A device and method for visualizing evaluation of skin elasticity
By using a skin elasticity evaluation device with laser positioning and mechanical limiting structure, combined with 3D image acquisition technology, the problem of inconsistent angles and forces in skin elasticity testing has been solved, achieving standardized indentation modeling and visual evaluation, and improving the accuracy and comparability of test results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-07
- Publication Date
- 2026-06-16
AI Technical Summary
In existing skin elasticity tests, it is difficult to precisely control the perpendicular angle between the device and the skin surface, and the pressure applied varies from person to person, resulting in poor consistency in the depth and shape of the indentation, which affects the accuracy and comparability of the test results.
The principle of three points being coplanar is achieved by using laser positioning components, combined with spring components and mechanical limiting structures to ensure constant pressing force. Indentation data is obtained through 3D image acquisition technology, forming a standardized and repeatable indentation molding process.
It achieves precise angle, constant pressure, and consistent shape in skin elasticity testing, improving the accuracy and comparability of test results, and providing a visual skin elasticity assessment tool.
Smart Images
Figure CN122208091A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of skin elasticity evaluation, specifically to a device and method for visually evaluating skin elasticity. Background Technology
[0002] Skin elasticity refers to the skin's ability to return to its original state after being deformed under external force. Its physiological basis mainly depends on the structural integrity and functional state of collagen and elastic fibers in the dermis. As one of the core indicators reflecting the degree of skin aging, accurate evaluation of skin elasticity has important application value in verifying the anti-aging efficacy of cosmetics, dermatological research, and clinical dermatology.
[0003] Currently, skin elasticity testing often involves creating a deformed impression on the skin surface through indentation, followed by instrumental assessment of recovery. However, existing molding procedures typically involve manually applying the device to the skin surface. In practice, it's difficult to precisely control the perpendicular angle between the device and the skin, and the pressure applied varies from person to person and from test to test, resulting in poor consistency in indentation depth and shape. Furthermore, traditional molding is complex and highly dependent on the operator's skill level. The repeatability of testing conditions between different operators or between multiple tests performed by the same operator is difficult to guarantee, directly impacting the accuracy and comparability of subsequent skin elasticity assessment results.
[0004] Therefore, there is an urgent need for a device for evaluating skin elasticity that can achieve precise vertical angle calibration, constant pressure control, and simplified operation. Summary of the Invention
[0005] In view of the above problems, the present application provides a device and method for visual evaluation of skin elasticity, which overcomes or at least partially solves the problem that it is difficult to guarantee the repeatability of test conditions between different operators or between multiple operations by the same operator, thus affecting the accuracy and comparability of subsequent skin elasticity assessment results.
[0006] A first aspect of this application provides a device for visually evaluating skin elasticity, comprising: a positioning element and an indentation forming element, the positioning element and the indentation forming element being connected. The positioning element includes a pressing sub-element, a spring sub-element, a shaft, a gripping sub-element, and a laser positioning sub-element; the indentation forming element includes a contact sub-element and a pressure head. The pressing sub-element is connected to the laser positioning sub-element via the shaft; the spring sub-element is arranged around the shaft; the gripping sub-element has a first hollow cavity, and the spring sub-element and the shaft are disposed within the first hollow cavity; the laser positioning sub-element is connected to the contact sub-element, and the contact sub-element is connected to the pressure head. In use, the positioning element is adjusted; when the laser positioning sub-element forms three laser points on the surface of the skin to be tested, the pressing sub-element is pressed until it contacts the gripping sub-element. The spring in the spring sub-element is compressed to provide a constant and repeatable pressing force. The pressing sub-element drives the shaft and the laser positioning sub-element to move in a direction close to the surface of the skin to be tested. The contact sub-element contacts the surface of the skin to be tested, and the pressure head, after contacting the surface of the skin to be tested, squeezes the surface of the skin to be tested to form an indentation.
[0007] This embodiment provides a device for visually evaluating skin elasticity. The device utilizes the principle of three coplanar points on a laser positioning component to transform the vertical calibration process into a visual judgment of laser point overlap. This allows the operator to precisely adjust the device to be perpendicular to the surface of the skin being tested, eliminating angular deviations caused by traditional visual estimation. Simultaneously, the mechanical limiting mechanism between the spring component, pressing component, and gripping component ensures constant control of the pressing pressure, guaranteeing consistent pressure values for each indentation. This application simplifies the complex indentation molding operation into a standardized, repeatable mechanical action. It requires no professional operator skills to obtain skin indentations with precise angles, constant pressure, and consistent shape, providing a stable and reliable physical sample basis for subsequent skin elasticity assessment and improving the accuracy and comparability of test results.
[0008] In one alternative embodiment, the spring component includes a first fixing plate, a second fixing plate, and a spring; the first fixing plate is fixed to the shaft on the side near the pressing component, the second fixing plate is fixed to the gripping component, the first end of the spring is fixed to the first fixing plate, the second end of the spring is fixed to the second fixing plate, and when the spring is compressed, the first fixing plate moves in the direction close to the second fixing plate.
[0009] In this embodiment, the transmission path and control precision of the pressing force are further optimized by setting up a cooperative structure of the first fixing plate, the second fixing plate, and the spring. The first fixing plate is fixed to the side of the shaft near the pressing component, the second fixing plate is fixed to the gripping component, and the spring connects the two. When the pressing component drives the shaft to press down, the spring is compressed between the two fixing plates, so that the deformation direction of the spring is highly consistent with the movement direction of the shaft. This effectively avoids the spring from deflecting or getting stuck during compression, ensuring stable transmission of the pressing force. This allows the compression stroke and elastic force output of the spring to be accurately reproduced in each pressing operation, further consolidating the constancy and repeatability of the pressing force. This provides a more reliable mechanical guarantee for the indentation molding process, while simplifying the assembly and maintenance of the device and improving its ease of use and durability.
[0010] In one alternative approach, the indenter contacts the surface of the skin to be tested before the contact element. Both the contact element and the indenter are cylindrical, with the outer diameter of the contact element being larger than the outer diameter of the indenter.
[0011] By setting the indenter to contact the skin surface before the contact element, and by defining both the contact element and the indenter as cylindrical with the contact element's outer diameter larger than the indenter's outer diameter, the process control and effect of indentation formation were further optimized. This ensures that the indenter contacts and penetrates the skin first, thus forming a clear annular indentation on the skin surface. Subsequently, the contact element adheres to the skin, and its larger outer diameter provides a stable support surface, effectively dispersing pressure and enhancing the device's adhesion stability on the skin, preventing device displacement during indentation. Simultaneously, the cylindrical design ensures the symmetry and uniform force distribution of the indentation, resulting in a regular indentation shape with clear boundaries, providing a more accurate and reliable physical sample basis for subsequent skin elasticity assessment.
[0012] In one alternative approach, the laser positioning sub-component has six laser beads on one side of its surface connected to the indentation forming component. The six laser beads are combined in pairs to form three positioning groups. The three positioning groups emit non-parallel positioning lasers, and the positioning lasers emitted by each positioning group converge at a distance of one centimeter from the laser positioning sub-component. When the laser positioning sub-component forms three laser points on the surface of the skin to be tested, the device for visually evaluating skin elasticity is perpendicular to the surface of the skin to be tested.
[0013] This embodiment utilizes the principle of three points being coplanar to transform the abstract judgment of spatial perpendicularity into an intuitive judgment of laser point coincidence. When the operator observes only three clear laser points on the surface of the skin to be tested, it indicates that the device has maintained a standard perpendicularity to the surface of the skin and the angle is correct. This eliminates the angle deviation caused by reliance on the operator's visual experience or repeated adjustments in traditional operations, making the perpendicularity calibration process simple, fast, and repeatable. It improves the standardization level of indentation modeling and provides a reliable guarantee for obtaining skin indentations with consistent shape and uniform force.
[0014] In one alternative embodiment, the device further includes an alignment member having a first receiving space and a second receiving space that communicate with each other. The second receiving space is used to receive the pressure head. The contact element is received in the first receiving space on the side closest to the second receiving space. After the indentation forming element is placed into the alignment member, the positioning element is placed into the alignment member. The positioning element is partially or entirely received in the first receiving space. The alignment member is used to accurately align the positioning element and the indentation forming element when they are connected.
[0015] The spatial positioning of the alignment component ensures precise alignment between the positioning component and the indentation forming component, guaranteeing that their axes are collinear during connection and preventing tilting or offset of the indentation forming component due to manual assembly deviations. Simultaneously, the alignment component serves as a temporary assembly carrier, allowing operators to reliably connect the positioning component and the indentation forming component without visual adjustment. This simplifies the operation process, improves assembly efficiency and consistency, and provides a fundamental guarantee that the indentation forming component will conform correctly to the skin during subsequent indentation molding.
[0016] In one alternative embodiment, the device further includes an adhesive element disposed on one side of the contact sub-component for connection with the laser positioning sub-component and on one side of the contact sub-component for contact with the surface of the skin to be tested.
[0017] In this embodiment, one side of the contact component is temporarily fixed to the laser positioning component via an adhesive, ensuring that the indentation forming component maintains a stable relative position with the positioning component during the transfer of the indentation forming component from the alignment component to the surface of the skin to be tested. This avoids assembly failure or angular displacement caused by shaking or detachment. The other side of the contact component is adhered to the surface of the skin to be tested via an adhesive, allowing the indentation forming component to be uniformly and firmly attached to the skin, maintaining a fixed position during indentation formation and preventing displacement or lifting caused by skin respiration, micro-movement, or the weight of the device itself.
[0018] In one alternative embodiment, the alignment member is further provided with a protrusion, the protrusion having a second hollow cavity, the second hollow cavity, the first receiving space and the second receiving space being connected, the pressure head passing through the second hollow cavity and being received in the second receiving space, the protrusion being used to prevent the adhesive part provided on the side of the contact sub-component for contacting the surface of the skin to be tested from contacting the alignment member.
[0019] A second aspect of this application provides a method for visually evaluating skin elasticity using a device for visually evaluating skin elasticity, comprising: a qualified subject cleansing their face with a standardized cleansing product and marking the surface of the skin to be tested. First, an indentation forming element is placed into a positioning element, then a positioning element is placed into the positioning element, fixing the indentation forming element onto a laser positioning element, and then the positioning element is removed; the positioning laser is turned on, and the direction of the positioning element is adjusted until the laser positioning element forms three laser points on the surface of the skin to be tested; the pressing element is then pressed along this direction to ensure that the indentation forming element is evenly pressed onto the surface of the skin to be tested. After a first time interval, the indentation forming element is removed, and an image of the surface of the skin to be tested is acquired using a 3D image acquisition instrument, and the initial indentation volume is analyzed. After the second time interval, images of the skin surface were acquired again, and the volume of the second depression was analyzed. Skin recovery rate on the surface of the tested skin .
[0020] The skin elasticity visualization evaluation method provided in this embodiment combines the standardized device provided in the aforementioned embodiments with 3D image acquisition technology to achieve full-process quantification and visualization from indentation modeling to elasticity recovery. This method first uses the device to form a standard indentation on the surface of the skin to be tested, with precise angles, constant pressure, and consistent shape, fundamentally eliminating modeling deviations caused by differences in operator experience in traditional methods. Then, a 3D image acquisition instrument acquires the three-dimensional morphology data of the indentation at the initial moment and after recovery, and calculates the skin recovery degree R value, transforming the abstract skin elasticity into an intuitive image of volume change and a quantifiable value. This method retains the accuracy and repeatability required for scientific evaluation while presenting the tactile characteristic of "elasticity" in a visual image form, allowing consumers to "understand" changes in skin elasticity at a glance. It provides a rigorous and easily disseminated evaluation tool for verifying the anti-aging efficacy of cosmetics, significantly improving the standardization level and interpretability of skin elasticity testing results.
[0021] In one alternative approach, the first time interval is 15 minutes and the second time interval is 5 minutes.
[0022] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of this application are described below. Attached Figure Description
[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the structure of a device for visually evaluating skin elasticity provided in some embodiments of this application.
[0025] Figure 2 This is a schematic diagram of the structure of the gripping component and the second fixing piece provided in some embodiments of this application.
[0026] Figure 3 This is a partial structural schematic diagram of a device for visually evaluating skin elasticity, provided in some embodiments of this application.
[0027] Figure 4 A cross-sectional view of a positioning element with a spring in an uncompressed state, provided for some embodiments of this application.
[0028] Figure 5 A cross-sectional view of a positioning member with a spring in a compressed state, provided for some embodiments of this application.
[0029] Figure 6 This is a schematic diagram showing the intersection of positioning lasers emitted by a laser positioning sub-component provided in some embodiments of this application.
[0030] Figure 7 A cross-sectional view of an indentation forming member placed inside an alignment member, according to some embodiments of this application.
[0031] Figure 8 This is a cross-sectional view of the positioning element, indentation forming element, and alignment element provided in some embodiments of this application before assembly.
[0032] Figure 9 This is a cross-sectional view of the positioning element, indentation forming element, and alignment element after assembly, according to some embodiments of this application.
[0033] Figure 10 This is a schematic diagram of the structure of an indentation forming part provided in some embodiments of this application.
[0034] Figure 11 Scatter plot of R² values and the correlation of R values for 10 subjects.
[0035] Figure 12 Example image of skin elasticity visualization captured by Antera3D.
[0036] Figure 13 Scatter plot of R² values and the correlation of R values for 13 subjects.
[0037] Figure 14 Example image of skin elasticity visualization captured by Primos CR.
[0038] Figure 15 This is a schematic diagram illustrating the actual use of the skin elasticity visualization evaluation device provided in the embodiments of this application. Detailed Implementation
[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
[0041] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and drawings of this application are intended to cover without excluding other meanings. The words "a" or "an" do not exclude the presence of multiples.
[0042] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0043] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.
[0044] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).
[0045] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, "connection" or "linkage" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by fasteners, such as a connection fixed by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. In circuit structures, "connection" or "linkage" can refer not only to a physical connection but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate component, as long as the circuit is connected; it can also refer to the internal connection of two components. Signal connection can refer not only to signal connection through a circuit but also to signal connection through a media, such as radio waves. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0046] Figure 1 This is a schematic diagram of the structure of a device for visually evaluating skin elasticity provided in some embodiments of this application. Figure 2 This is a schematic diagram of the structure of the gripping component and the second fixing piece provided in some embodiments of this application.
[0047] refer to Figure 1 and Figure 2 The device includes a positioning component and an indentation forming component, which are connected. The positioning component includes a pressing component 01, a spring component, a shaft 02, a gripping component 03, and a laser positioning component 04. The indentation forming component includes a contact component 05 and a pressure head 06. The pressing component 01, the gripping component 03, and the laser positioning component 04 can all be cylindrical. The pressing component 01 is connected to the laser positioning component 04 via the shaft 02. The spring component is arranged around the shaft 02. The gripping component 03 has a first hollow cavity 031, and the spring component and the shaft 02 are located within the first hollow cavity 031. The laser positioning component 04 is connected to the contact component 05, and the contact component 05 is connected to the pressure head 06. In use, adjust the positioning element. When the laser positioning element 04 forms three laser points on the surface of the skin to be tested, press the pressing element 01 until it contacts the holding element 03. The spring 071 inside the spring element is compressed to provide a constant and repeatable pressing force, wherein the pressing force can be up to 225 g / cm². 2 The above describes the process of pressing component 01 moving shaft 02 and laser positioning component 04 towards the surface of the skin to be tested, contact component 05 contacting the surface of the skin to be tested, and pressing head 06 pressing the surface of the skin to be tested to form an indentation.
[0048] The pressure head 06 can be a raised annular structure on the surface of the contact element 05, with the following geometric dimensions: outer diameter (the diameter of the outer circumference of the annulus) not greater than 6 mm; width (the radial thickness of the annulus) 0.8–1.2 mm, equal to half the difference between the outer and inner diameters; and depth (the height of the raised annulus) 1–2 mm. This dimensional range ensures that the indentation is clearly formed and suitable for human skin testing. The outer diameter of the pressing element 01 can be larger than the size of the first hollow cavity 031 to prevent the pressing element 01 from entering the first hollow cavity 031, thus avoiding inconsistent pressing force.
[0049] In practical applications, the indentation forming part can be a thin sheet structure of equal thickness and made of transparent material. When the positioning laser is incident perpendicularly, the light will not be deflected when passing through the indentation forming part. Furthermore, the reflection interference can be eliminated by setting an anti-reflection film on the indentation forming part, and the laser point can be precisely superimposed on the skin without affecting the realization of the three-point coplanar positioning principle.
[0050] This embodiment provides a device for visually evaluating skin elasticity. Utilizing the three-point coplanarity principle of the laser positioning component 04, the vertical calibration process is transformed into a visual judgment of laser point overlap. This allows the operator to precisely adjust the device to be perpendicular to the skin surface being tested, eliminating angular deviations caused by traditional visual estimation. Simultaneously, the mechanical limiting mechanism between the spring component, pressing component 01, and gripping component 03 ensures constant control of the pressing pressure, guaranteeing consistent pressure values for each indentation. This application simplifies the complex indentation molding operation into a standardized, repeatable mechanical action. It requires no professional operator skills to obtain skin indentations with precise angles, constant pressure, and consistent shape, providing a stable and reliable physical sample basis for subsequent skin elasticity assessment and significantly improving the accuracy and comparability of test results.
[0051] Figure 3 This is a partial structural schematic diagram of a device for visually evaluating skin elasticity provided in some embodiments of this application. Figure 4 This is a cross-sectional view of a positioning member with a spring in an uncompressed state, provided in some embodiments of this application. Figure 5 A cross-sectional view of a positioning member with a spring in a compressed state, provided for some embodiments of this application.
[0052] refer to Figure 2 , Figure 3 , Figure 4 and Figure 5The spring component includes a first fixing plate 072, a second fixing plate 073, and a spring 071. The first fixing plate 072 is fixed to the shaft body 02 on the side near the pressing component 01, the second fixing plate 073 is fixed to the holding component 03, the first end of the spring 071 is fixed to the first fixing plate 072, and the second end of the spring 071 is fixed to the second fixing plate 073. When the spring 071 is compressed, the first fixing plate 072 moves in the direction close to the second fixing plate 073.
[0053] In this embodiment, the transmission path and control precision of the pressing force are further optimized by setting up a cooperative structure of the first fixing plate 072, the second fixing plate 073, and the spring 071. The first fixing plate 072 is fixed on the side of the shaft 02 near the pressing component 01, the second fixing plate 073 is fixed on the gripping component 03, and the spring 071 is connected between the two. When the pressing component 01 drives the shaft 02 to press down, the spring 071 is compressed between the two fixing plates, so that the deformation direction of the spring 071 is highly consistent with the movement direction of the shaft 02. This effectively avoids the spring 071 from deflecting or getting stuck during the compression process, ensuring the stable transmission of the pressing force. This allows the compression stroke and elastic force output of the spring 071 to be accurately reproduced in each pressing operation, further consolidating the constancy and repeatability of the pressing force, providing a more reliable mechanical guarantee for the indentation molding process, while simplifying the assembly and maintenance of the device and improving its convenience and durability.
[0054] In some embodiments, the pressure head 06 contacts the surface of the skin to be tested before the contact element 05. Both the contact element 05 and the pressure head 06 are cylindrical, and the outer diameter of the contact element 05 is larger than the outer diameter of the pressure head 06.
[0055] By setting the indenter 06 to contact the skin surface before the contact element 05, and by limiting both the contact element 05 and the indenter 06 to cylindrical shapes with the outer diameter of the contact element 05 being larger than that of the indenter 06, the process control and effect of indentation formation are further optimized. This ensures that the indenter 06 contacts and presses into the skin first, thus forming a clear annular indentation on the skin surface. Subsequently, the contact element 05 adheres to the skin, and its larger outer diameter provides a stable support surface, effectively dispersing pressure and enhancing the adhesion stability of the device on the skin, preventing device displacement during the indentation process. Simultaneously, the cylindrical design ensures the symmetry and uniform force distribution of the indentation, resulting in a regular indentation shape with clear boundaries, providing a more accurate and reliable physical sample basis for subsequent skin elasticity assessment.
[0056] In some embodiments, Figure 6 This is a schematic diagram illustrating the convergence of positioning lasers emitted by laser positioning sub-components provided in some embodiments of this application. (See reference) Figure 6The laser positioning sub-component 04 has six laser beads 08 on one side of its surface connected to the indentation forming component. These six laser beads 08 are arranged in pairs to form three positioning groups. Each of the three positioning groups emits non-parallel positioning lasers, and the lasers emitted by each group converge at a distance of one centimeter from the laser positioning sub-component 04. These three convergence points are coplanar laser points. When the laser positioning sub-component 04 forms three laser points on the surface of the skin to be tested, the skin elasticity visualization evaluation device is perpendicular to the surface of the skin to be tested.
[0057] This embodiment utilizes the principle of three points being coplanar to transform the abstract judgment of spatial perpendicularity into an intuitive judgment of laser point coincidence. When the operator observes only three clear laser points on the surface of the skin to be tested, it indicates that the device has maintained a standard perpendicularity to the surface of the skin and the angle is correct. This eliminates the angle deviation caused by reliance on the operator's visual experience or repeated adjustments in traditional operations, making the perpendicularity calibration process simple, fast, and repeatable. It improves the standardization level of indentation modeling and provides a reliable guarantee for obtaining skin indentations with consistent shape and uniform force.
[0058] In some embodiments, the device further includes an alignment member 09, which may be a circular groove structure, and the dimensions of the alignment member 09, the positioning member, and the indentation forming member are matched. Figure 7 This is a cross-sectional view of an indentation forming member inserted into an alignment member, provided in some embodiments of this application. Figure 8 This is a cross-sectional view of the positioning element, indentation forming element, and alignment element provided in some embodiments of this application before assembly. Figure 9 This is a cross-sectional view of the positioning element, indentation forming element, and alignment element after assembly, according to some embodiments of this application. (See reference...) Figure 7 , Figure 8 and Figure 9 The alignment member 09 is provided with a first receiving space 091 and a second receiving space 093, which are connected. The second receiving space 093 is used to receive the pressure head 06. The contact part 05 is received in the first receiving space 091 on the side close to the second receiving space 093. After the indentation forming part is placed into the alignment member 09, the positioning part is placed into the alignment member 09 and contacts the indentation forming part. The positioning part is partially or completely received in the first receiving space 091. The alignment member 09 is used to accurately align the positioning part and the indentation forming part when they are connected.
[0059] The spatial positioning of the alignment component 09 ensures precise alignment between the positioning component and the indentation forming component, guaranteeing that their axes are collinear during connection and preventing tilting or offset of the indentation forming component due to manual assembly deviations. Simultaneously, the alignment component 09 serves as a temporary assembly carrier, allowing the operator to reliably connect the positioning component and the indentation forming component without visual adjustment. This simplifies the operation process, improves assembly efficiency and consistency, and provides a fundamental guarantee that the indentation forming component will conform correctly to the skin during subsequent indentation molding.
[0060] In some embodiments, Figure 10 This is a schematic diagram of the structure of an indentation forming part provided in some embodiments of this application, with reference to... Figure 10 The device also includes an adhesive 10, which can be an adhesive or other adhesive material. The adhesive 10 is provided on one side of the contact sub-component 05 for connection with the laser positioning sub-component 04 and on the other side of the contact sub-component 05 for contact with the surface of the skin to be tested.
[0061] In this embodiment, one side of the contact component 05 is temporarily fixed to the laser positioning component 04 via the adhesive component 10. This ensures that the indentation forming component remains relatively stable relative to the positioning component during the transfer of the indentation forming component from the alignment component 09 to the surface of the skin to be tested, avoiding assembly failure or angular displacement due to shaking or detachment. The other side of the contact component 05 is adhered to the surface of the skin to be tested via the adhesive component 10, allowing the indentation forming component to be evenly and firmly attached to the skin, maintaining a fixed position during indentation formation, and preventing displacement or lifting due to skin respiration, micro-movement, or the weight of the device.
[0062] In some embodiments, the alignment member 09 is further provided with a protrusion 092, the protrusion 092 is provided with a second hollow cavity, the second hollow cavity, the first receiving space 091 and the second receiving space 093 are all connected, the pressure head 06 passes through the second hollow cavity and is received in the second receiving space, the protrusion 092 is used to block the adhesive 10 provided on the side of the contact sub-member 05 that is used to contact the surface of the skin to be tested from contacting the alignment member 09.
[0063] In practical applications, the indentation forming part can also be provided with a mating part 11, which contacts the protrusion 092, and the protrusion 092 can be a bead-shaped protrusion.
[0064] Another embodiment of this application also provides a method for visually evaluating skin elasticity using a device, comprising: a qualified subject cleansing their face with a standardized cleansing product and marking the surface of the skin to be tested. First, an indentation forming element is placed into a positioning element, then a positioning element is placed into the positioning element, fixing the indentation forming element onto a laser positioning element. The positioning element is then removed. The positioning laser is turned on, and the direction of the positioning element is adjusted. When the laser positioning element forms three laser points on the surface of the skin to be tested, the pressing element is pressed along this direction to ensure that the indentation forming element is evenly pressed onto the surface of the skin to be tested. After a first time interval, the indentation forming element is removed from the surface of the skin to be tested. An image of the surface of the skin to be tested is acquired using a 3D image acquisition instrument, and the initial indentation volume is analyzed. After the second time interval, images of the skin surface were acquired again, and the volume of the second depression was analyzed. Skin recovery rate on the surface of the tested skin The first time interval can be 15 minutes, and the second time interval can be 5 minutes.
[0065] The skin elasticity visualization evaluation method provided in this embodiment combines the standardized device provided in the aforementioned embodiment with 3D image acquisition technology to achieve full-process quantification and visualization from indentation modeling to elasticity recovery. This method first uses the device to form a standard indentation on the surface of the skin to be tested, with precise angles, constant pressure, and consistent shape, fundamentally eliminating modeling deviations caused by differences in operator experience in traditional methods. Then, a 3D image acquisition instrument is used to acquire the three-dimensional morphology data of the indentation at the initial moment and after recovery, and the skin recovery degree is calculated. This method transforms the abstract concept of skin elasticity into intuitive images of volume changes and quantifiable numerical values. It retains the precision and repeatability required for scientific evaluation while presenting the tactile characteristic of "elasticity" in a visual image format, allowing consumers to "understand" changes in skin elasticity at a glance. This provides a rigorous yet easily understandable assessment tool for verifying the anti-aging efficacy of cosmetics, significantly improving the standardization and interpretability of skin elasticity testing results.
[0066] The skin elasticity visualization evaluation method provided in this application will be described below with reference to specific embodiments.
[0067] Example 1
[0068] Subject selection Selection criteria: 1. Age between 18 and 42 years old; 2. No allergic diseases, and no history of allergies to cosmetics or other topical preparations; 3. Those whose facial skin is free of damage, acne, scars, birthmarks, pigmented nevi, inflammation, etc.; 4. Be able to understand the testing process, voluntarily participate in the test and sign a written informed consent form, and abide by the testing procedures.
[0069] Exclusion criteria: 1. Women who are currently pregnant or breastfeeding; 2. The test site has dermatitis, scars, or severe folliculitis, which may affect the experimental results; 3. Patients with clinically unhealed inflammatory skin diseases at the test site; 4. Those who have used antihistamines in the past week or immunosuppressants in the past month; 5. Subjects who have participated in related or other clinical trials or taken oral hormone medications or other activities that may affect test results within the past month; 6. Other factors that researchers believe will affect the evaluation results.
[0070] Test process: Subjects cleaned their faces under the guidance of testers, and then sat still for 30 minutes in an environment with a temperature of 20°C to 22°C and a relative humidity of 40% to 60%. The intersection of the outer corner of the eye and the corner of the mouth was selected as the skin surface to be tested and marked. The tester first places the indentation forming part into the alignment part with the indenter head facing down, then places the positioning part into the alignment part to fix the indentation forming part onto the laser positioning part, and removes the positioning part; turns on the positioning laser, holds the part by hand and adjusts the direction of the positioning part, and when the laser positioning part forms 3 laser points on the surface of the skin to be tested; press the part along this direction to make the indentation forming part press evenly on the surface of the skin to be tested; After the indentation form is pressed against the surface of the skin to be tested for 15 minutes, it is gently peeled off, and images of the skin surface are acquired using Antera 3D to analyze the initial indentation volume. Five minutes later, images of the skin surface were acquired again, and the volume of the second depression was analyzed. .
[0071] It should be noted that, in order to increase the consistency between the results of this method and the traditional skin elasticity testing method, the elasticity R2 value of the subject's skin surface was also collected before modeling. The skin surface recovery degree was calculated, and the skin recovery degree was: .
[0072] Data statistics results The initial depression volume was obtained by analyzing the initial depression image and the depression image recovered after 5 minutes using the image analysis software built into Antera 3D. Second concave volume The skin recovery degree R was further calculated and compared with the skin elasticity R2 value obtained from the traditional elasticity test. In this embodiment, there were 10 qualified subjects, and their relevant data are shown in Table 1.
[0073] Table 1. R² values and R values for 10 subjects
[0074] A higher R2 value indicates better elasticity; a higher R value indicates better skin recovery within the same time period. Skin elasticity refers to the skin's ability to return to its original shape after deformation, so a higher R value can also indicate better skin elasticity.
[0075] Figure 11 A scatter plot showing the R² values and the correlation between R values for 10 subjects, where x represents the R² value, y represents the R value, and R represents the R-value. 2 R² and R = the coefficient of determination obtained after linear fitting. 2 The closer the value is to 1, the higher the goodness of fit. (From Table 1 and...) Figure 11 Chinese R 2 The value of R² is 0.8062, indicating that the R value measured by the method provided in this embodiment has good consistency with the R² value measured by the traditional method, and the R value is directly proportional to the R² value. Therefore, it can effectively evaluate skin elasticity, verifying the reliability and effectiveness of the evaluation method. Specifically, R... 2 It can be automatically calculated using statistical software such as Excel, SPSS, and Python's sklesnd library. Figure 12 Example image of skin elasticity visualization captured by Antera3D, for reference. Figure 12 The changes in skin elasticity of subject P009 can be visually observed. Figure 12 (a) is the initial concavity image, and (b) is the concavity image after 5 minutes of recovery.
[0076] Example 2 Subject selection and testing procedures were the same as in Example 1, except that the 3D image acquisition instrument was replaced with a Primos CR. The initial indentation images and the indentation images after 5 minutes of recovery were analyzed using the accompanying Vectra image analysis software. This verified that consistent results could be obtained using different 3D image acquisition instruments, thus demonstrating the reliability and stability of the evaluation method provided in this example. In this example, there were 13 qualified subjects, and their relevant data are shown in Table 2.
[0077] Table 2.1 R² values and R values for 13 subjects
[0078] Figure 13This is a scatter plot showing the R² values and the correlation between R values for 13 subjects, where x represents the R² value, y represents the R value, and R0 represents the R2 value. 2 R² and R = the coefficient of determination obtained after linear fitting. 2 The closer the value is to 1, the higher the goodness of fit. (From Table 2 and...) Figure 13 Chinese R 2 The value of R = 0.7166 indicates that the R value measured by the method provided in this embodiment has good consistency with the R² value measured by the traditional method, and the R value is directly proportional to the R² value. Therefore, it can effectively evaluate skin elasticity, verifying the reliability and effectiveness of the evaluation method. Specifically, R... 2 It can be automatically calculated using statistical software such as Excel, SPSS, and Python's sklesnd library. Figure 14 Example image of skin elasticity visualization collected by Primos CR, for reference. Figure 14 The changes in skin elasticity of subject P013 can be visually observed. Figure 14 (c) is the initial concave image, and (d) is the concave image after 5 minutes of recovery.
[0079] Figure 15 This is a schematic diagram of the actual use of the skin elasticity visualization evaluation device provided in the embodiments of this application. In the figure, (e) is a schematic diagram of the state when the skin elasticity visualization evaluation device is perpendicular to the surface of the skin to be tested, and (g) is a schematic diagram of the indentation formed on the surface of the skin to be tested.
[0080] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.
[0081] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. A device for visually evaluating skin elasticity, characterized in that, The device includes: A positioning element and an indentation forming element, wherein the positioning element and the indentation forming element are connected; The positioning component includes a pressing component, a spring component, a shaft, a gripping component, and a laser positioning component; the indentation forming component includes a contact component and a pressure head. The pressing component is connected to the laser positioning component via the shaft, the spring component is arranged around the shaft, the gripping component has a first hollow cavity, and the spring component and the shaft are arranged in the first hollow cavity; the laser positioning component is connected to the contact component, and the contact component is connected to the pressing head; In use, adjust the positioning component. When the laser positioning component forms three laser points on the surface of the skin to be tested, press the pressing component until it contacts the gripping component. The spring inside the spring component is compressed to provide a constant and repeatable pressing force. The pressing component drives the shaft and the laser positioning component to move in a direction close to the surface of the skin to be tested. The contact component contacts the surface of the skin to be tested. After the pressure head contacts the surface of the skin to be tested, it squeezes the surface of the skin to be tested to form an indentation.
2. The apparatus according to claim 1, characterized in that, The spring component includes a first fixing plate, a second fixing plate, and the spring; The first fixing plate is fixed to the shaft body on the side near the pressing part, the second fixing plate is fixed to the gripping part, the first end of the spring is fixed to the first fixing plate, the second end of the spring is fixed to the second fixing plate, and when the spring is compressed, the first fixing plate moves in the direction close to the second fixing plate.
3. The apparatus according to claim 1, characterized in that, The pressure head contacts the surface of the skin to be tested before the contact element. Both the contact element and the pressure head are cylindrical, and the outer diameter of the contact element is larger than the outer diameter of the pressure head.
4. The apparatus according to claim 1, characterized in that, The laser positioning sub-component has six laser beads on one side of its surface connected to the indentation forming component. The six laser beads are combined in pairs to form three positioning groups. The three positioning groups emit non-parallel positioning lasers. The positioning lasers emitted by each positioning group converge at a distance of one centimeter from the laser positioning sub-component. When the laser positioning sub-component forms three laser points on the surface of the skin to be tested, the skin elasticity visualization evaluation device is perpendicular to the surface of the skin to be tested.
5. The apparatus according to claim 1, characterized in that, The device further includes an alignment member, which has a first accommodating space and a second accommodating space. The first accommodating space and the second accommodating space are connected. The second accommodating space is used to accommodate the pressure head. The contact sub-component is accommodated in the first accommodating space on the side close to the second accommodating space. After the indentation forming member is placed in the alignment member, the positioning member is placed in the alignment member. The positioning member is partially or entirely accommodated in the first accommodating space. The alignment member is used to accurately align the positioning member and the indentation forming member when they are connected.
6. The apparatus according to claim 5, characterized in that, The device further includes an adhesive component disposed on one side of the contact sub-component for connection with the laser positioning sub-component and on the other side of the contact sub-component for contact with the surface of the skin to be tested.
7. The apparatus according to claim 6, characterized in that, The alignment member is further provided with a protrusion, and the protrusion is provided with a second hollow cavity. The second hollow cavity, the first accommodating space and the second accommodating space are all connected. The pressure head passes through the second hollow cavity and is accommodated in the second accommodating space. The protrusion is used to prevent the adhesive part provided on the side of the contact sub-component that is used to contact the surface of the skin to be tested from contacting the alignment member.
8. A method for visually evaluating skin elasticity, characterized in that, The method, applied to the skin elasticity visualization evaluation apparatus according to any one of claims 1-7, comprises: Eligible subjects used standardized cleansing products to clean their faces and mark the areas on the surface of the skin to be tested. First, place the indentation forming element into the alignment element, then place the positioning element into the alignment element to fix the indentation forming element onto the laser positioning sub-element, and remove the positioning element; turn on the positioning laser and adjust the direction of the positioning element. When the laser positioning sub-element forms 3 laser points on the surface of the skin to be tested; press the pressing sub-element along this direction so that the indentation forming element is evenly pressed onto the surface of the skin to be tested; After the indentation forming element presses against the surface of the skin to be tested for a first time interval, it is removed, and an image of the surface of the skin to be tested is acquired using a 3D image acquisition instrument to analyze the initial indentation volume. After the second time interval, an image of the skin surface to be tested is acquired again, and the volume of the second depression is analyzed. ; The skin recovery degree of the skin surface to be tested .
9. The method according to claim 8, characterized in that, The first time interval is 15 minutes, and the second time interval is 5 minutes.