LED microneedle roller
Patent Information
- Application Number
- CN202611190494.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-06
- Publication Date
- 2026-10-27
AI Technical Summary
本发明一种LED微针滚轮，本发明通过手柄主体、具有电气连接通路及转轴安装孔的导电支架与中心装配轴的结构配合，将发光组件与微针滚轮组件进行了高度的电气接通与机械集成，使得在应对起伏多变的面部轮廓进行连续滚动操作时，光源体系与微针阵列能够始终保持同步运动，克服了现有独立分体式设备难以使光源焦区追踪微针动态运动轨迹的缺陷，确保了光照作用区与微针瞬时刺入的微孔区域实时重合；
Smart Images
Figure CN122973784A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of skin beauty and skin physiotherapy equipment technology, and in particular to an LED microneedle roller. Background Technology
[0002] Microneedling rollers are commonly used in the beauty and skincare industry. They primarily rely on microneedles arranged on the roller surface to create microchannels on the skin, promoting the penetration of skincare ingredients. Current industry practice shows that microneedling's physical penetration enhancement and LED photobiological therapy have synergistic effects, and the combination of the two can simultaneously open the skin barrier and provide deep light-based repair. To achieve these synergistic effects, current microneedling treatments typically use a combination of phototherapy components and microneedling components.
[0003] Existing combination solutions mainly take two forms: independent external and internal integration. However, both forms have their own technical limitations in actual working conditions.
[0004] The first method typically uses a separate external light source paired with a purely mechanical microneedle roller for separate operation. This approach, relying on separate devices for coordinated operation, has the following drawbacks. The reason it's difficult to achieve ideal synergy is that facial contours have varying curvatures, and during continuous rolling, the microneedle's effective area is in a dynamic displacement state. Using a separate external light source means the operator needs to constantly adjust the light's illumination angle to track the microneedle's rolling trajectory. This separate operation makes it difficult to ensure that the light source's focal zone always coincides with the micropore area where the microneedle momentarily pierces, reducing the reliability of simultaneous phototherapy and penetration enhancement.
[0005] To address the cumbersome nature of separate operations, there are also attempts to integrate LED light-emitting components directly into the microneedle roller, i.e., placing the light source inside the central rotating shaft of the roller. This solution, which relies on internal light emission and transmits light from the inside out, also has the following drawbacks.
[0006] The reason why the internally integrated solution has a weak luminous intensity and is difficult to reach the effective phototherapy threshold is because it is limited by both the internal space size and the external optical transmission path. First, due to the small overall size of the handheld microneedle roller, the space inside the roller that can be used to arrange the central rotating shaft is limited. This limited cavity structure restricts the size of the internal LED chip, driver substrate and heat dissipation components, thereby limiting the initial output power of the light-emitting component.
[0007] Secondly, in the light transmission path, when the built-in light source emits light outwards, the light path needs to pass through the translucent roller shell and the outer microneedle array in sequence. When the light passes through the interface of materials with different densities, refraction and surface reflection occur, resulting in primary energy loss. More importantly, the outer surface of the roller is densely covered with opaque metal microneedles (usually arranged in a high-density array). These dense metal structures are located precisely in the light emission path, and the metal needles and the needle roots inside the shell block the outward-transmitted light. This scattering and shadow-blocking effect generated by the high-density metal components not only further weakens the effective light energy reaching the skin surface but also makes the transmitted light spot exhibit uneven brightness distribution, making it difficult to achieve the requirements of uniform and effective local phototherapy. Summary of the Invention
[0008] The present invention provides an LED microneedle roller to address the problems in existing microneedle phototherapy combination schemes, such as the difficulty in achieving overlap between the light-illuminated area and the microneedle action area in separate operation, and the limitations of built-in integrated structures due to internal space and light path obstruction by dense metal microneedles, resulting in limited light output power, large light energy transmission loss and uneven light spot distribution.
[0009] The present invention employs the following technical solution: an LED microneedle roller. It includes... The handle body has a power supply component inside and a plug-in female with built-in conductive contacts at the front end; A conductive bracket, the rear end of which is inserted into the plug-in female to form an electrical connection with the power supply component, and the front end extends into a symmetrical fork-shaped clamping arm, on which a rotating shaft mounting hole is provided; The central assembly shaft has both ends inserted into the rotating shaft mounting holes and fixedly connected to the conductive bracket. A microneedle roller assembly, comprising a roller body sleeved outside the central mounting shaft and adapted to rotate about it; The roller body adopts a multi-piece axially stacked structure, which is composed of several independent disc-shaped wheel pieces that are tightly attached and spliced together along the axial direction. The disc-shaped wheel has a through-hole for light transmission, and a positioning gap is formed at the joint of two adjacent disc-shaped wheels. A microneedle is embedded in the positioning gap. The light-emitting component is electrically connected to the conductive support and is adapted to output light and irradiate the skin surface through the light-transmitting micropores and positioning gaps.
[0010] Furthermore, the microneedle roller assembly also includes a hollow roller shaft; The roller shaft is coaxially provided with an assembly hole and is sleeved outside the central assembly shaft and is adapted to rotate around it; Each of the disc-shaped wheel pieces is sequentially and tightly fitted together on the outside of the roller shaft along the axial direction of the roller shaft to provide a support base for the stacked layers.
[0011] Furthermore, the positioning gap is formed by the spacing of positioning protrusions provided on the side of the disc-shaped wheel; Each of the disc-shaped wheel pieces has a crimping ring embedded on its side, and the crimping ring abuts against and presses against the surface of the microneedle; Roller end caps are fastened to both sides of the roller body along the axial direction, which are suitable for fixing the micro needle by axially tightening with the crimping ring to prevent it from loosening during rolling.
[0012] Furthermore, the central assembly shaft is specifically a light guide shaft with the light-emitting component integrated inside. The shaft wall of the light guide shaft adopts a side-emitting light design to transmit light to the outside. The light guide shaft has positioning shaft heads at both ends. The positioning shaft heads are inserted into the mounting holes of the shaft and pressed against the annular conductive contacts in the holes to achieve electrical conduction and mechanical positioning.
[0013] Furthermore, the central assembly shaft is specifically a support shaft that provides support. An assembly gap is reserved between the inner wall of the fork-shaped clamping arm and the end face of the roller body, so that one end of the support shaft has a partially exposed area to the outside. It also includes an external phototherapy component that is suspended on the front side of the roller body; the light-emitting component is integrated inside the external phototherapy component; The external phototherapy component includes a damping fixing collar fitted onto the locally exposed area, an extension rod connected to the fixing collar, and a horizontal rod connected to the end of the extension rod; The light-emitting component is installed inside the horizontal bar.
[0014] Furthermore, the horizontal bar has a cavity inside and a light-leaking groove is formed on the surface inclined toward the bottom of the roller body; A light-diffusing plate with a frosted scattering layer is installed at the light-leaking groove, which is suitable for converting the direct light from the light-emitting component into a uniform surface light source and transmitting it to a specific position.
[0015] Furthermore, the outer surface of the horizontal bar is symmetrically provided with arc-shaped sliding grooves; A light-blocking cover is slidably installed in the sliding groove, and a damping slider that cooperates with the damping of the sliding groove is provided on the inner wall of the light-blocking cover. The light-blocking cover is adapted to slide and adjust along the sliding groove to block and adjust the illumination range transmitted from the light-diffusing plate.
[0016] Furthermore, the light-emitting component includes a rotating lamp post movably installed in the internal cavity of the horizontal rod, and a polyhedral rotating cover fixedly sleeved on the outside of the rotating lamp post; Each outer surface of the polyhedral rotating cover is embedded with LED light strips of different wavelengths, which are adapted to align the LED light strips of specific wavelengths with the light leakage groove when the rotating lamp post is rotated.
[0017] Furthermore, one end of the rotating lamp post extends out of the end of the horizontal rod and is fixedly connected to a switching knob; The end of the horizontal bar is integrally formed with a locking ring, and the inner wall of the locking ring is equidistantly embedded with spring steel balls that are pushed by springs. The outer wall of the switching knob is provided with a locking hole, and the spring steel ball is adapted to protrude partially and engage with the locking hole to form a damping position when switching bands.
[0018] Furthermore, the horizontal bar, the extension bar, and the support shaft all have interconnected cavities inside; The power supply wires of the LED light strip are concealed and pass through the interior of the horizontal rod, the extension rod and the support shaft in sequence, and are connected to the contacts in the mounting hole of the rotating shaft.
[0019] The technical solutions adopted in the embodiments of the present invention can achieve the following beneficial effects: This invention relates to an LED microneedle roller. Through the structural cooperation of the handle body, the conductive bracket with electrical connection path and rotating shaft mounting hole, and the central assembly shaft, the light-emitting component and the microneedle roller assembly are highly electrically connected and mechanically integrated. This allows the light source system and the microneedle array to maintain synchronous movement when continuously rolling to deal with the undulating facial contours. This overcomes the defect of existing independent and separate devices that make it difficult for the focal area of the light source to track the dynamic movement trajectory of the microneedles, and ensures that the illumination area and the micro-hole area where the microneedles are instantly inserted coincide in real time. Meanwhile, the roller body of the present invention adopts a multi-piece axial stacked structure, which is formed by several independent disc-shaped wheel pieces closely attached and spliced together. By opening light-transmitting micro-holes through the disc-shaped wheel pieces and using the positioning gap formed by the intervals at the splicing points of the wheel pieces to embed micro-needles, this structure can achieve high-density micro-needle modular assembly while forming a straight light-transmitting channel through the roller body. The light emitted by the light-emitting component can be directly transmitted to the skin surface through the light-transmitting micro-holes and positioning gaps, thereby effectively avoiding the refraction and reflection energy attenuation caused by the light having to penetrate the shell in traditional internal integration solutions. It also avoids the obstruction of the outward transmission light path by the dense metal needles and needle roots, reducing light energy loss and improving the uniformity of the light spot distribution. Attached Figure Description
[0020] The accompanying drawings, which are provided to further illustrate the invention and form part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.
[0021] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of an LED micro-needle roller according to this application; Figure 2 For the present invention Figure 1 A schematic diagram of the exploded structure; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the external phototherapy component structure of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the exploded structure; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B; Figure 7 For the present invention Figure 4 A schematic diagram of a local structure in the image; Figure 8 For the present invention Figure 7 A schematic diagram of the exploded structure; Figure 9 For the present invention Figure 8 Enlarged structural diagram at point C; Figure 10 For the present invention Figure 5 A schematic diagram of the exploded structure; Figure 11 for Figure 10 Enlarged structural diagram at point D.
[0022] Figure label: 1. Handle body; 2. Conductive support; 21. Rotary shaft mounting hole; 3. Microneedle roller assembly; 31. Roller body; 32. Light-transmitting micro-hole; 33. Positioning protrusion; 331. Roller shaft; 34. Microneedle; 35. Crimping ring; 36. Roller end cap; 37. Light guide shaft; 38. Support shaft; 4. External phototherapy assembly; 41. Extension rod; 42. Fixing collar; 43. Horizontal rod; 431. Sliding groove; 432. Light leakage groove; 44. Light shield; 45. Rotating lamp post; 46. Polyhedral rotating cover; 47. LED light strip; 48. Light dome; 49. Locking ring; 491. Spring steel ball; 410. Switching knob; 411. Locking buckle hole. Detailed Implementation
[0023] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.
[0024] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0025] Example 1: This example mainly introduces the basic structure and working principle of the LED microneedle roller, specifically: like Figures 1-3 As shown, this application provides an LED microneedle roller, including a handle body 1. The handle body 1 is a hollow ergonomic arc-shaped grip shell. It should be noted that: as the basis for gripping and powering the entire device, a drive circuit board and a battery compartment are set inside the handle body 1. The battery compartment contains an independent rechargeable lithium-ion battery for powering the entire circuit and the front-end phototherapy component. The outer wall of the handle body 1 has reserved control button positions, and a charging interface is set at the tail. A plug-in female is opened at the front end of the handle body 1, and the female has built-in conductive contacts that are connected to the internal circuit.
[0026] A conductive bracket 2 is connected to the front end of the handle body 1. The conductive bracket 2 is integrally formed from elastic conductive metal. The rear end of the bracket is a male plug-in end. An elastic conductive spring is provided on the male plug-in end. After the male plug-in end is inserted into the female plug-in end at the front end of the handle body 1, the elastic conductive spring can form an electrical connection with the internal circuit of the handle. The front end of the conductive bracket 2 extends into a symmetrical fork-shaped clamping arm. A rotating shaft mounting hole 21 is provided on the fork-shaped clamping arm, and an annular conductive contact is embedded in the rotating shaft mounting hole 21.
[0027] It should be noted that the conductive support 2 has a bent shape relative to the handle body 1 to fit the facial contour. This bent structure is suitable for ensuring that the microneedle roller assembly 3 fits the skin during operation.
[0028] A microneedle roller assembly 3 is provided at the front end of the conductive support 2. The microneedle roller assembly 3 includes a roller body 31. A roller shaft 331 is provided through the center of the roller body 31. A coaxial through mounting hole (not shown in the figure) is opened at the axis of the roller shaft 331. The roller body 31 is sleeved on the outside of the roller shaft 331. The roller body 31 is made of light-transmitting ABS material. The roller body 31 adopts a multi-piece axially stacked structure. Specifically, the roller body 31 is formed by several independent disc-shaped wheel pieces that are tightly spliced together along the axial direction of the central roller shaft 331. The disc-shaped wheel has a through-hole 32 for light transmission. Positioning protrusions 33 are spaced circumferentially on the side of the disc-shaped wheel, with a positioning gap between adjacent protrusions 33. The position of this positioning gap corresponds to the position of the through-hole 32. Medical stainless steel microneedles 34 are embedded within the positioning gaps. A crimping ring 35 is embedded on the side of each disc-shaped wheel, its surface contacting the microneedles 34 to press and hold the annularly distributed microneedles. By tightly fitting several disc-shaped wheels together axially, and using the crimping rings 35, the microneedles 34 are fixed, resulting in 192 microneedles 34 evenly distributed on the circumferential surface of the roller body 31. Roller end caps 36 are fastened to both axial sides of the roller body 31.
[0029] A light guide shaft 37 is fitted inside the roller shaft 331. The main body of the light guide shaft 37 is a cylindrical hollow shaft, which integrates an LED light source and a uniform light guide structure. The shaft wall adopts a side-emitting light design. The two ends of the light guide shaft 37 form positioning shaft heads with conductive contacts (not shown in the figure). The light guide shaft 37 is coaxially inserted into the mounting hole of the roller shaft 331. At the same time, the positioning shaft heads at both ends of the light guide shaft 37 are engaged in the shaft mounting hole 21 of the conductive bracket 2, so that the conductive contacts on the shaft head are pressed and connected with the annular contacts in the shaft mounting hole 21. The light guide shaft 37 is fixed to the conductive bracket 2. The roller body 31 is fitted on the outside of the light guide shaft 37, so that the roller body 31 is suitable for rotating around the light guide shaft 37. This shaft-sleeve separation structure allows the central light source to maintain static light emission, while the outer roller can roll smoothly, avoiding the internal wiring from tangling and breaking due to rotation.
[0030] During assembly, the light guide shaft 37 is coaxially inserted into the mounting hole of the roller shaft 331 of the microneedle roller assembly 3, allowing the roller body 31 to rotate freely around the light guide shaft 37. The positioning shaft heads at both ends of the light guide shaft 37 are inserted into the shaft mounting holes 21 of the fork-shaped arm at the front end of the conductive bracket 2, so that the conductive contacts on the positioning shaft heads are pressed and connected with the annular contacts in the shaft mounting holes 21, thus completing the assembly of the front roller module. This plug-in and pressing-conducting mechanical structure ensures the connection strength while achieving seamless connection of the internal circuit, simplifying the assembly process.
[0031] Subsequently, the male connector at the rear end of the conductive bracket 2 is inserted into the female connector at the front end of the handle body 1. The elastic conductive spring automatically engages and forms electrical conductivity, completing the assembly of the entire machine. This highly modular assembly logic enables each component to be produced and maintained independently, reducing the cost of later product maintenance and microneedle consumable replacement.
[0032] When the device is powered on, the battery inside the handle body 1 supplies power to the LED light source inside the light guide shaft 37 located at the axis through the drive board and the conductive path of the conductive bracket 2. The light guide shaft 37 continuously outputs beauty wavelength light to the outer periphery of the roller in a 360° range. When the hand handle body 1 is rolled on the skin surface, the microneedle roller assembly 3 rotates synchronously around the fixed light guide shaft 37. The microneedles 34 form instantaneous micropore channels on the skin surface. The light emitted by the light guide shaft 37 is directly transmitted to the skin surface through the light-transmitting micropores 32 and the gaps between the microneedles 34. Example
[0033] In the process of the above embodiment 1, by embedding the light guide shaft 37 in the center of the roller body 31, light is transmitted from the inside to the outside. However, when the light passes through the roller body 31 and the dense microneedles 34, it will be blocked and refracted to a certain extent, resulting in the attenuation of light energy reaching the skin surface. At the same time, the light guide shaft 37 emits light in all directions 360°, which will cause the light on the non-contact surface to be wasted and direct glare. To address this issue, this embodiment modifies the optical path structure and adds an external phototherapy component 4 based on Embodiment 1. Specifically, as follows... Figures 4-11 As shown, in this embodiment, the light guide shaft 37 in the original embodiment 1 is replaced by a support shaft 38. The two ends of the support shaft 38 are inserted into the shaft mounting holes 21 of the conductive bracket 2. The roller body 31 is rotatably sleeved on the outside of the support shaft 38. An assembly gap is reserved between the inner wall of the fork-shaped clamping arm at the front end of the conductive bracket 2 and one end face of the roller body 31. The assembly gap allows one end of the support shaft 38 to have a partially exposed area. This exposed area provides an independent mounting point for the subsequent mounting of external components.
[0034] An external phototherapy component 4 is provided on the front side of the microneedle roller assembly 3. The external phototherapy component 4 includes fixing collars 42 on both sides of the support shaft 38. The fixing collars 42 are sleeved on the outside of the partially exposed area of the support shaft 38, and the fixing collars 42 and the support shaft 38 are sleeved in a damping fit. Extension rods 41 are fixedly connected to the surface of each of the two fixing collars 42. A horizontal rod 43 is fixedly connected between the ends of the two extension rods 41 away from the fixing collars 42. The horizontal rod 43 is suspended on the front side of the roller body 31. The horizontal rod 43 is mechanically connected to the support shaft 38 through the extension rods 41. This floating installation structure allows the horizontal rod 43 and its internal light-emitting components to be separated from the rotation of the roller body 31, which not only avoids the optical obstruction and loss of the internal medium, but also prevents it from bumping into the face due to its spanning layout.
[0035] The horizontal rod 43 has a cavity inside. A light-leaking groove 432 is formed on the bottom surface of the horizontal rod 43 facing the roller body 31. The light-leaking groove 432 is inclined towards the bottom of the roller body 31 that contacts the facial skin. A light-diffusing plate 48 with a frosted scattering layer is installed at the light-leaking groove 432. Two arc-shaped sliding grooves 431 are symmetrically formed on the outer surface of the horizontal rod 43. A light-blocking cover 44 is slidably installed in the sliding groove 431. There are two light-blocking covers 44 symmetrically arranged. A damping slider is provided on the inner wall of the light-blocking cover 44. The damping slider is slidably connected to the sliding groove 431. By moving the position of the light-blocking cover 44 in the sliding groove 431, it is suitable for blocking and adjusting the range of light transmitted from the light-diffusing plate 48. This damping sliding structure provides smooth rotation adjustment of the light-blocking cover 44, ensuring the stability of the illumination range and achieving anti-glare. A rotating lamp post 45 is movably installed in the internal cavity of the horizontal rod 43. The two ends of the rotating lamp post 45 are movably connected to the inner wall of the horizontal rod 43 through a rotating shaft. A polyhedral rotating cover 46 with a polyhedral structure is fixedly sleeved on the outside of the rotating lamp post 45. LED light strips 47 are embedded on each outer surface of the polyhedral rotating cover 46. The polyhedral rotating cover 46 is opposite to the light leakage groove 432 at the bottom of the horizontal rod 43. Through the design of the polyhedral structure, multiple independent light sources are integrated in the limited external tube space, providing a structural basis for rapid switching of multiple bands.
[0036] One end of the rotating lamp post 45 extends out of the end of the horizontal rod 43 and is fixedly connected to a switching knob 410. A locking ring 49 is integrally formed at the end of the horizontal rod 43 near the switching knob 410. The switching knob 410 is inserted into the locking ring 49 and rotates in cooperation with the locking ring 49. Several spring steel balls 491 are equidistantly embedded on the inner wall of the locking ring 49. Under the pushing action of the back spring, the spring steel balls 491 partially protrude from the inner wall of the locking ring 49. At the same time, a locking buckle hole 411 is opened on the outer wall of the switching knob 410. The locking buckle hole 411 on the surface of the switching knob 410 engages with the partially protruding spring steel balls 491. This positioning mechanism ensures that the specific LED light strip 47 is aligned with the light leakage groove 432 with each band switch and provides the user with a mechanical gear switching feel.
[0037] It should be noted that the power supply wires of the LED light strip 47 pass through the internal cavity of the horizontal rod 43, the inside of the extension rod 41, and the inside of the support shaft 38 in sequence, and are connected to the contacts in the rotating shaft mounting hole 21 of the conductive bracket 2. This fully concealed internal wiring layout effectively avoids the risk of pulling and breaking of external flying wires during operation and the risk of short circuit caused by liquid ingress, thus improving the electrical safety of the whole machine.
[0038] During operation, the switching knob 410 is manually rotated, which drives the rotating lamp post 45 and the polyhedral rotating cover 46 to rotate within the horizontal rod 43. This causes the LED light strips 47 of different wavelengths attached to the polyhedral rotating cover 46 to align with the light leakage groove 432 and the light dome plate 48. During rotation, the spring steel ball 491 separates and engages between the inner wall of the locking ring 49 and the locking buckle hole 411 on the outer wall of the switching knob 410, forming mechanical damping during rotation. This enables the switching of different phototherapy wavelengths. The light emitted by the lit LED light strips 47 passes through the light dome plate 48 and directly illuminates the skin surface at the bottom of the roller body 31 from the outside. At the same time, the light range is limited to a specific contact arc surface by the sliding light shield 44.
[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.
Claims
1. An LED microneedle roller, characterized in that, include: The handle body (1) has a power supply component inside and a plug-in female with built-in conductive contacts at the front end; The conductive bracket (2) has its rear end inserted into the plug-in female socket to form an electrical connection with the power supply component, and its front end extends into a symmetrical fork-shaped clamping arm, on which a rotating shaft mounting hole (21) is provided. The central assembly shaft has both ends inserted into the rotating shaft mounting holes (21) and fixedly connected to the conductive bracket (2); The microneedle roller assembly (3) includes a roller body (31) sleeved outside the central mounting shaft and adapted to rotate about it. The roller body (31) adopts a multi-piece axial stacked structure, which is composed of several independent disc-shaped wheel pieces that are tightly attached and spliced together along the axial direction. The disc-shaped wheel has a through-hole (32) for light transmission, and the joint of two adjacent disc-shaped wheels is spaced apart to form a positioning gap, and a micro needle (34) is embedded in the positioning gap. The light-emitting component is electrically connected to the conductive support (2) and is adapted to output light and irradiate the skin surface through the light-transmitting micro-hole (32) and the positioning gap.
2. The LED microneedle roller according to claim 1, characterized in that: The microneedle roller assembly (3) also includes a hollow roller shaft (331). The roller shaft (331) has a mounting hole through it coaxially, and is sleeved on the outside of the central mounting shaft and is adapted to rotate around it; Each of the disc-shaped wheel pieces is sequentially and tightly fitted together on the outside of the roller shaft (331) along the axial direction of the roller shaft (331) to provide a support base for the stacked layers.
3. The LED microneedle roller according to claim 2, characterized in that: The positioning gap is formed by the positioning protrusions (33) provided on the side of the disc-shaped wheel; Each of the disc-shaped wheel pieces is fitted with a crimping ring (35) on its side, and the crimping ring (35) abuts against and presses against the surface of the microneedle (34); Roller end caps (36) are fastened to both sides of the roller body (31) along the axial direction, which are suitable for fixing the micro needle (34) by axially tightening the crimping ring (35) to prevent it from loosening during rolling.
4. The LED microneedle roller according to claim 3, characterized in that: The central assembly shaft is specifically a light guide shaft (37) with the light-emitting component integrated inside. The shaft wall of the light guide shaft (37) adopts a side-emitting light design to transmit light to the outside. The light guide shaft (37) has positioning shaft heads at both ends. The positioning shaft heads are inserted into the shaft mounting holes (21) and pressed and connected with the annular conductive contacts in the holes to achieve electrical connection and mechanical positioning.
5. The LED microneedle roller according to claim 3, characterized in that: The central assembly shaft is specifically a support shaft (38) that provides support. An assembly gap is reserved between the inner wall of the fork-shaped clamping arm and the end face of the roller body (31), so that one end of the support shaft (38) has a partially exposed area. It also includes an external phototherapy component (4) suspended on the front side of the roller body (31); the light-emitting component is integrated inside the external phototherapy component (4); The external phototherapy component (4) includes a damping fixing collar (42) fitted onto the local exposed area, an extension rod (41) connected to the fixing collar (42), and a horizontal rod (43) connected to the end of the extension rod (41). The light-emitting component is installed inside the horizontal bar (43).
6. The LED microneedle roller according to claim 5, characterized in that: The horizontal bar (43) has a cavity inside and a light leakage groove (432) is opened on the surface inclined toward the bottom of the roller body (31). A light-diffusing plate (48) with a frosted scattering layer is installed at the light-leaking groove (432), which is suitable for converting the direct light of the light-emitting component into a uniform surface light source and transmitting it to a specific position.
7. The LED microneedle roller according to claim 6, characterized in that: The outer surface of the horizontal bar (43) is symmetrically provided with arc-shaped sliding grooves (431). A light shield (44) is slidably installed in the sliding groove (431), and a damping slider that cooperates with the sliding groove (431) is provided on the inner wall of the light shield (44). The light-blocking cover (44) is adapted to slide along the sliding groove (431) to block and adjust the range of light transmitted from the light-diffusing plate (48).
8. The LED microneedle roller according to claim 6, characterized in that: The light-emitting component includes a rotating lamp post (45) movably installed in the cavity inside the horizontal rod (43), and a polyhedral rotating cover (46) fixedly sleeved on the outside of the rotating lamp post (45). Each outer surface of the polyhedral rotating cover (46) is embedded with LED light strips (47) of different wavelengths, which are suitable for aligning the LED light strips (47) of a specific wavelength with the light leakage groove (432) when the rotating lamp post (45) is rotated.
9. The LED microneedle roller according to claim 8, characterized in that: One end of the rotating lamp post (45) extends out of the end of the horizontal bar (43) and is fixedly connected to a switching knob (410). The end of the horizontal bar (43) is integrally formed with a locking ring (49), and the inner wall of the locking ring (49) is equidistantly embedded with spring steel balls (491) pushed by the spring. The outer wall of the switching knob (410) is provided with a locking hole (411), and the spring steel ball (491) is adapted to protrude partially and engage with the locking hole (411) to form a damping position when switching bands.
10. An LED microneedle roller according to claim 8, characterized in that: The horizontal bar (43), the extension bar (41), and the support shaft (38) all have interconnected cavities inside; The power supply wires of the LED light strip (47) are concealed in sequence through the interior of the horizontal rod (43), the extension rod (41) and the support shaft (38), and are connected to the contacts in the rotating shaft mounting hole (21).