CN117077479A

CN117077479A - Ergonomic eyeglass design and manufacturing method and Ergonomic eyeglass

Info

Publication number: CN117077479A
Application number: CN202311040484.8A
Authority: CN
Inventors: 刘波; 徐在坤
Original assignee: Beijing Bar Headed Goose Intelligent Technology Co ltd
Current assignee: Beijing Bar Headed Goose Intelligent Technology Co ltd
Priority date: 2023-08-17
Filing date: 2023-08-17
Publication date: 2023-11-17
Anticipated expiration: 2043-08-17
Also published as: CN117077479B

Abstract

The present disclosure provides an ergonomic eyeglass design and preparation method and ergonomic eyeglass, relating to the eyeglass design and manufacturing field. The ergonomic eyeglass design and preparation method includes determining eyeglass parameters and styles; head-face reverse engineering 3D modeling and data processing; the method comprises the steps of adopting a forward engineering method to establish an integral spectacle frame model and a pile head model of the glasses, and adopting a reverse engineering method to establish an adaptive nose support model of the glasses; establishing an integrated mirror body model according to the mirror frame model, the pile head model and the adaptive nose support model; and establishing an adaptive glasses leg model by adopting a forward and reverse engineering hybrid modeling method according to the glasses parameters, the glasses frame model, the pile head model and the head and face 3D model. Finally, the glasses mainly prepared by the flexible digital manufacturing technology are simple in structure, exquisite, firm and convenient to assemble, the suitability and comfort level of the glasses and the head and face parts of a user are improved, the accuracy and stability of three postures of the glasses can be ensured, and the wearing quality and the use experience of the user are improved.

Description

Ergonomic eyeglass design and manufacturing method and Ergonomic eyeglass

Technical Field

The invention relates to the technical field of glasses design and manufacturing, in particular to an ergonomic glasses design and manufacturing method and ergonomic glasses.

Background

In the prior art, glasses basically stay in the traditional modes of manual standardization, standardized design and standardization and batch manufacturing, and related parts such as a lens ring, a cross beam, a nose support assembly, a pile head, a hinge assembly, a lens leg assembly, various fasteners and the like are standardized and batch manufactured and then assembled for production. Because the head and face structural outline of each user is different, and the structural size of the prior glasses adopts standardized and normalized design modes based on experience and statistical data, the glasses are difficult to accurately adapt to different users, so that the glasses are poor in head and face adaptation degree with the users, and the glasses are difficult to assemble. For example, the nose pad has poor fitting property with nose parts, the length of the spleen body and the shape of the foot cover are difficult to be well matched with the head structure and the ear roots, so that the nose pad is excessively pressed on the skin and the glasses are worn, and the problems of loosening, sliding down, poor stability, poor comfort, attractive appearance and the like are caused. In addition, the existing glasses have the problems of complex structure and process flow, tiny and numerous parts, high assembly difficulty, low precision, easy deformation, poor durability, poor maintainability and the like, and the adaptation degree and wearing quality of the glasses are also easy to reduce.

Disclosure of Invention

The invention aims at providing an ergonomic glasses design and preparation method and an ergonomic glasses, which are convenient to assemble, improve the fit degree of the ergonomic glasses and the head and the face of a user, ensure the accuracy and the stability of three postures of the ergonomic glasses and improve the wearing quality and the use experience of the user.

In a first aspect, the present invention provides an ergonomic eyeglass design and method of making, comprising:

s1: determining glasses parameters and styles, wherein the glasses parameters comprise parameters of a glasses frame, parameters of lenses and posture parameters of the glasses frame, and the styles are determined according to functional requirements and use scenes of users;

s2: head-face reverse engineering 3D modeling and data processing are carried out, a reverse engineering technology is adopted to obtain user head-face point cloud and image original data, the original data is optimized and curved surface fitting is carried out to carry out 3D modeling, and feature detection and measurement are carried out on the original data to obtain design parameters; wherein the reverse engineering techniques include 3D scanning and stereoscopic techniques;

s3: establishing an integral frame model of the glasses by adopting a forward engineering method according to the glasses parameters and style information; the integral mirror frame model comprises left and right mirror rings, a cross beam and a shaping sheet;

S4: according to style information of the glasses, a pile head model of the glasses is established by adopting a forward engineering method, and the pile head model comprises a pile head body, a front hinge, a positioning base surface and simulated glasses legs;

s5: an adaptive nose pad model is established by adopting a reverse engineering method, the adaptive nose pad is one of important ergonomic structural bodies, a NURBS curved surface of a nose is taken as an original design basis, fitting design modeling is carried out by adopting a complete customization mode, and the adaptive nose pad is tightly attached to the nose of a user in design;

s6: integrating the integral mirror frame model, the adaptive nose support model and the pile head model by adopting a forward and reverse engineering mixed modeling method to establish an integrated mirror body model; the integral mirror frame model and the adaptive nose support model are fixedly connected through a nose support structure body and are smoothly fused into a whole, and the integral mirror frame model and the pile head model are fixedly connected through a pile head transition reinforcing sheet and are smoothly fused into a whole;

s7: establishing an adaptive mirror leg model by adopting a forward and reverse engineering hybrid modeling method according to the parameters and style of the glasses, the integrated mirror body model and the head and face 3D model; the fitted temple is also one of the important ergonomic structures, including the head, body and tail of the spleen; the spleen body adopts a bending pre-deformation design in appearance, and a gradual change section design is structurally carried out according to a cantilever theory; the ridge line of the spleen tail is subjected to fitting design according to the outline structure of the rear auricle, and good adaptation with the rear auricle of a user is ensured in design.

The ergonomic eyeglass design and preparation method further comprises:

preparing left and right lenses according to the shaping sheet model, or processing and polishing finished lens blanks into matched left and right lenses by taking the finished shaping sheet as a template, preparing an integrated lens body according to the integrated lens body model, and preparing an adaptive lens leg according to the adaptive lens leg model;

fitting the fitted temple pieces to the integral body to form an ergonomic eyeglass frame, and fitting the left and right lenses into left and right rims of the ergonomic eyeglass frame to form an ergonomic eyeglass finished product.

In a second aspect, the present invention provides an ergonomic eyeglass made using the ergonomic eyeglass design and manufacturing method as described above.

The beneficial effects of the embodiment of the invention include:

the ergonomic glasses design and preparation method provided by the embodiment of the invention adopts a forward engineering method to establish an integral glasses frame model and a pile head model of the glasses, adopts a reverse engineering method to establish an adaptive nose support model of the glasses, and adopts a forward and reverse engineering mixed modeling method to fuse the integral glasses frame model, the pile head model and the adaptive nose support model to generate an integrated glasses body model. And establishing an adaptive glasses leg model by adopting a forward and reverse engineering hybrid modeling method according to the glasses parameters, the integral glasses frame model, the pile head model and the head and face 3D model. The comprehensive application of the technology and the modeling method truly integrates the ideas of ergonomics and customization into the design and preparation process of the glasses, thereby fundamentally ensuring that the invention can prepare high-quality customized ergonomic glasses products meeting various use scenes and diversity requirements of users.

The ergonomic glasses provided by the embodiment of the invention are manufactured by adopting the design and preparation method of the ergonomic glasses, are simple in structure, convenient to assemble, attractive and practical, and high in precision of the whole glasses and each structural part, can improve the fitting degree of the ergonomic glasses and the head and the face of a user, can ensure the accuracy and the stability of three postures of the glasses, and improves the wearing quality and the use experience of the user.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic block diagram of steps of an ergonomic eyeglass design method provided by an embodiment of the present invention;

FIG. 2 is a block diagram of sub-steps of step S1 of FIG. 1;

FIG. 3 is a block diagram of sub-steps of step S2 in FIG. 1;

FIG. 4 is a block diagram of the substeps of step S3 of FIG. 1;

FIG. 5 is a block diagram of the substeps of step S4 of FIG. 1;

FIG. 6 is a block diagram of sub-steps of step S5 of FIG. 1;

FIG. 7 is a block diagram of sub-steps of step S6 of FIG. 1;

FIG. 8 is a block diagram of sub-steps of step S7 of FIG. 1;

fig. 9 is a block diagram of sub-steps of the ergonomic eyeglass manufacturing method (step S8) provided in the present embodiment;

FIG. 10 is a graphical illustration of a design modeling process for adapting a nose pad;

FIG. 11 is a graphical schematic diagram of a design modeling process for an adaptive temple;

FIG. 12 is a schematic view of a front view of ergonomic glasses according to an embodiment of the present invention;

fig. 13 is a schematic view of a rear view of an ergonomic eyeglass according to an embodiment of the present invention, which is partially cut away.

Icon: 100-ergonomic glasses; 110-mirror body; 111-pile heads; 112-transition reinforcement sheet; 120-integral frame; 121-a mirror ring; 122-a beam; 123-a strength enhancing ring; 124-a lens mounting groove; 125-shaping sheets; 130-fitting a nose pad; 131-curved surface supporting leaf bodies; 132-nose pad support sheet; 133-ventilation holes; 134-anti-skid patterns; 135-vent holes; 140-fitting the temples; 141-splenic head; 142-spleen body; 143-spleen tail.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the structures and technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The structures of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or structure to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the mechanical connection and the fusion transition connection can be adopted; can be fixed by direct mortise and tenon joint or can be connected by a hinge. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the prior art, glasses basically stay in the traditional modes of manual standardization, standardized design and standardization and batch manufacturing, and related parts such as a lens ring, a cross beam, a nose support assembly, a pile head, a hinge assembly, a lens leg assembly, various fasteners and the like are standardized and batch manufactured and then assembled for production. Because the head and face structural outline and the like of each user are different, the structural size of the prior glasses adopts standardized and normalized design modes based on experience and statistical data, and the glasses are difficult to adapt to different users, so that the adaptation degree of the glasses and the users is poor, and the glasses are difficult to prepare; for example, the nose pad has poor fitting property with nose parts, and the length of the spleen body and the shape of the foot cover are difficult to be well matched with the head structure and the ear roots, so that the nose pad is excessively pressed on the skin or the glasses are loosened and slipped down after being worn, the stability is poor, the comfort is poor, the attractiveness is affected, and the like. In particular, for the existing optical glasses, the requirements of the structure and posture parameters such as pupil distance, pupil height, eye distance, front inclination angle, mirror angle and the like are difficult to ensure when the glasses are worn, so that the optical axis of the optical lens is difficult to be accurately matched with the visual axis of the eye, and the defect of vision correction function is caused, so that the side effects such as dizziness, nausea, blurred vision, deepening of degree, internal and external strabismus and the like are caused. In addition, the existing glasses have the problems of complex structure and process flow, tiny and numerous parts, high assembly difficulty, low precision, easy deformation, poor durability, poor maintainability and the like, and the adaptation degree and wearing quality of the glasses are also easy to reduce.

In view of this, this embodiment proposes an ergonomic glasses, fully considers the contradiction between the standardized normalization of the existing glasses structure size and the diversity of the user's head and face structure size, truly integrates the ergonomic and customized ideas into the glasses design and preparation process, and provides a brand-new customized ergonomic glasses design and preparation method, so as to well solve various problems in the existing glasses design, manufacture and lens matching.

Referring to fig. 1, an ergonomic glasses design and preparation method provided by an embodiment of the present invention includes:

s2: head-face reverse engineering 3D modeling and data processing are carried out, user head-face point cloud and image original data are obtained by adopting a reverse engineering technology, the original data are optimized and subjected to surface fitting to carry out 3D modeling, and feature detection and measurement are carried out on the original data to obtain design parameters; wherein reverse engineering techniques include 3D scanning and stereoscopic techniques;

s3: according to the parameters and style information of the glasses, a forward engineering method is adopted to establish an integral frame model of the glasses; the integral mirror frame model comprises left and right mirror rings, a cross beam and a shaping sheet;

s6: adopting a forward and reverse engineering mixed modeling method, integrating an integral mirror frame model, an adaptive nose support model and a pile head model to establish an integrated mirror body model; the integral mirror frame model and the adaptive nose pad model are fixedly connected through a nose pad supporting structure body and are smoothly fused into a whole, and the integral mirror frame model and the pile head model are fixedly connected through a pile head transition reinforcing sheet and are smoothly fused into a whole;

s7: establishing an adaptive mirror leg model by adopting a forward and reverse engineering hybrid modeling method according to the parameters and style of the glasses, the integrated mirror body model and the head and face 3D model; adapting the temple is also one of the important ergonomic structures, including the head, body and tail of the spleen; the spleen body adopts a bending pre-deformation design in appearance, and a gradual change section design is structurally carried out according to a cantilever theory; the ridge line of the spleen tail is subjected to fitting design according to the outline structure of the rear auricle, and good adaptation with the rear auricle of a user is ensured in design.

Referring to fig. 2, in step S1, the step of determining parameters and styles of glasses mainly includes: step S11, step S12, step S13, and step S14.

Step S11: the functional requirements and the use scenes of the user are analyzed. Functional requirements include, but are not limited to, light protection, vision care, vision correction, diving swimming, labor protection, cosmetic decoration, etc., and use scenarios include, but are not limited to, office, indoor, outdoor, sports, swimming, skiing, and dangerous work, etc. Comprehensive reference to these functional requirements, use of situational information and ergonomic correlation theory is one of the important bases for estimating the design parameters.

Step S12: refraction and diopter analysis. The diopter, the astigmatism and the interpupillary distance of the eyes of the user are determined through optometry. If the user has vision correction requirements, the step mainly determines parameters such as diopter, astigmatism, pupil distance and the like of the eyes of the user through professional optometry equipment and professional analysis.

Step S13: and analyzing and selecting lens parameters. The parameters of the lens are determined according to the functional requirements and the use situation of the user and the optometry result in step S12. Wherein, the parameters of the lens comprise material, thickness, base curve of the lens and the like. In particular, for vision correction lenses, parameters such as correction power, refractive index, abbe number, camber, coating film and the like need to be determined, and the data information is a necessary basis for the eyeglass design modeling process; after the lens parameters are determined, the optimal lens model is selected from the lens database by combining the user function requirements and the use scene.

Step S14: and determining three postures, structural parameters and styles of the glasses. Wherein, three posture parameters of the glasses comprise the front inclination angle, the mirror angle and the eye distance of the glasses; the structural parameters of the glasses comprise parameters such as the size and distance of a glasses ring, the size and position of a cross beam, the position of a pile head, the pre-deformation axis of a glasses leg, the shape of a section and the like; the style information of the glasses comprises the shapes of lenses and mirror rings, pile head patterns, beam patterns, nose pad patterns, glasses leg patterns and the like. Preferably, in this step, according to the results of steps S11 to S13, the ergonomic theory, the vision correction theory, the glasses professional correlation theory, and the user preference are integrated, and the three-posture of the glasses, the parameters of the adaptive nose pad, the parameters of the adaptive glasses leg, and other key parameters are determined as necessary input parameters for the hybrid modeling of forward and reverse engineering.

It should be noted that, the front tilt angle, the mirror angle and the eye distance are collectively referred to as three postures of the glasses, and the accuracy and stability of the three postures of the glasses directly affect the wearing quality of the glasses and the use experience of the user. The fitting nose pad and the fitting glasses leg are the most important ergonomic structures of the glasses, the fitting nose pad and the fitting glasses leg are fitted with the head and face of a user, and the fitting degree directly influences the accuracy and stability of three postures, so that the validity and the fitting of the ergonomic structures are always considered in the design and preparation process of the glasses.

Referring to fig. 3, in step S2, the steps of head-face reverse engineering 3D modeling and data processing mainly include: step S21, step S22, step S23, step S24, step S25, and step S26.

Step S21: and acquiring head and face original point cloud data of the user by a reverse engineering method. Mature technologies and equipment such as 3D scanning, stereoscopic vision, camera arrays and the like can be adopted to collect original point cloud data of the appearance structure of the head and the face of a user, and necessary cutting, merging, coordinate transformation and the like are carried out on the data to form input point cloud data.

Step S22: and optimizing and gridding packaging the original point cloud data. And (3) denoising, filtering, sampling, aligning and registering the input point cloud data in the step (S21) to form orderly and orderly high-quality global point cloud data, and performing gridding packaging on the global point cloud data to generate a 3D grid model of the user head and face structure.

Step S23: and (5) trimming and optimizing the grid model. Performing grid doctor trimming, noise reduction, relaxation, hole repair, fairing and the like on the 3D grid model in the S22 to generate a fairing complete grid model; in particular, for the requirements of ergonomic structures such as orbit supports, the uneven areas around the eyebrows and eyes in the mesh model are further subjected to relaxation and sanding smoothing to generate a high-quality model with more smooth local details.

Step S24: NURBS surface modeling based on grid model. And S23, manually extracting curvature lines, constructing curved surface sheets, moving panels, constructing grids, fitting curved surfaces and splicing the high-quality grid model or directly adopting automatic curved surface operation to generate an accurate and smooth 3D-NURBS curved surface model of the head and the face of the user.

Step S25: facial feature point detection and measurement based on pattern recognition. Firstly, feature points such as pupils, inner and outer canthus, upper auricle and the like are detected by using artificial intelligent algorithms such as mature face recognition, feature detection and the like, then coordinates of the feature points are calculated by adopting a stereoscopic vision technology or matching the feature points with point clouds, and parameters such as interpupillary distance, temporal width, upper auricle distance and the like are further calculated.

Step S26: and establishing a joint base coordinate system of the head and face model and the eyeglass modeling. Firstly, a joint base coordinate system is established according to the characteristic points in S25 and the head and face 3D model in S24, then the absolute pose of the characteristic points and the head and face 3D model is kept motionless, the coordinate systems of the characteristic points and the head and face 3D model are transformed from an original coordinate system to a newly built joint base coordinate system, at the moment, the head and face 3D model is in a given modeling pose in the joint base coordinate system, and the joint base coordinate system is used as a reference coordinate system for three-pose and subsequent design modeling of glasses.

The method for establishing the base coordinate system comprises the following steps: 1. taking the midpoint of the connecting line of the left pupil and the right pupil as the origin of a basic coordinate system, wherein the y-axis is collinear with the connecting line, and the direction of the y-axis points to the left pupil from the right pupil; 2. the x-axis is parallel to the horizontal vision of eyes in the head-face 3D model and points to the vision direction; 3. the z-axis is defined by the right hand rule of the space coordinate system according to the x-axis and the y-axis, is vertical to the horizontal sight line and is vertically upwards.

Referring to fig. 4, in step S3, the step of establishing the overall frame model of the glasses by using the forward engineering method mainly includes: step S31, step S32, step S33, step S34, step S35, and step S36.

Step S31: designing a lens contour curve and generating a shaping sheet model. Firstly, designing a lens contour curve according to the style and the use scene of the glasses, and lofting and scaling the shape of the lens ring according to the temporal width and the interpupillary distance of a user; secondly, an extension spherical surface where the front surface and the rear surface of the shaping sheet are positioned is established, and the contour line of the lens is stretched to generate an annular stretching surface which is intersected with the two spherical surfaces; secondly, generating a curved surface enveloping body through combined trimming operation and generating a shaping sheet base body model through closed curved surface operation; finally, a positioning hole is formed in the center of the shaping sheet through groove or hole opening operation and is used as a positioning reference when the lens is ground.

It will be appreciated that the curvature of the spherical surface should be consistent with the base curve parameters of the standard lens in step S13, so that the shaped piece and the front surface of the standard lens have the same curvature, and will be used as a template for the grinding process of the real lens in the subsequent step; in addition, the front and rear surfaces of the shaping sheet are generally designed to be spherical surfaces, but are not limited to the spherical surfaces, and can be other types of curved surfaces, and the invention is not limited.

Step S32: and generating left and right lens ring models according to the lens contour and the lens base curve. Firstly, carrying out assembly tolerance lofting on a lens contour curve to generate a lens ring contour; secondly, generating a first mirror ring matrix model through modeling operations such as graphic stretching, curved surface combined trimming, thick curved surface and the like according to parameters such as a mirror lens base curve, a mirror ring thickness, a mirror ring height and the like; and then, attaching a layer of strength enhancement ring structure to the outer side of the first mirror ring to form a first mirror ring model through external ring surface sweeping and curved surface sewing operation. Optionally, if the glasses are in a half frame structure, the lower half frame needs to be removed through a physical cutting operation. Finally, after various modification operations such as chamfering and rounding are performed to smooth and beautify the model, a symmetrical second mirror ring model is generated through a physical mirror image operation.

In this embodiment, the first rim model is a right rim model, and the second rim model is a left rim model; alternatively, in some embodiments, if the size and strength of the rim base is sufficient, the strength-enhancing rim need not be created, and in other embodiments, the left rim model may be created first, followed by a mirror image operation to create the right rim model, which is not specifically limited herein.

Step S33: and carrying out pose transformation on the left and right rim models according to the three poses of the glasses. Firstly, according to the coordinates of the left pupil and the right pupil and the parameters of the lens distance, the left and the right mirror circles are respectively transformed to preset positions through translational transformation, at the moment, the optical center position of the rear surface of the lens is right in front of the pupil, and the distance between the optical center position and the corneal vertex at the pupil is just consistent with the lens distance; then, respectively carrying out sweepback rotation transformation on the left and right mirror rings, wherein the rotation shafts are respectively vertical straight lines which pass through the rotation centers of the left and right eyeballs and are parallel to the z axis, and the rotation angle is (180-mirror angle)/2; finally, the left and right mirror rings are used as a whole to perform forward tilting rotation transformation, the rotation axis is a connecting line of the rotation centers of the left and right eyeballs, and the rotation angle is the forward tilting angle.

It can be understood that the pose transformation of the left and right mirror rings is based on the joint base coordinate system in the S26, so that the left and right mirror rings and the preset lenses can be ensured to meet the three designed poses of the glasses, and the whole glasses can meet the three designed pose requirements after the subsequent forward and reverse engineering modeling.

It should be noted that, the center of rotation of an eyeball is a term of art for ophthalmology, and is a center point around which the eyeball moves in all directions, and is generally located 13.5 mm behind the vertex of the cornea. For users with better left and right pupil symmetry, the step S32 and the step S33 can be combined and simplified, namely, pose transformation is firstly carried out after a first mirror ring model is generated, and finally, a second mirror ring conforming to three poses is obtained through mirror image operation, and for users with worse left and right pupil symmetry, the steps are needed to be operated respectively according to the original steps.

Step S34: and building an adaptive beam model according to the left and right mirror ring models and the pose. Firstly, determining the position of a cross beam, appearance parameters and modeling flow according to the style of glasses; secondly, according to the pose of the left and right mirror rings and characteristic side lines near the upper cross beam of the mirror rings, adopting spline curve connection, fillet connection, curve projection, curve cutting, curve jointing and other operations to outline the 3D wire frame structure of the cross beam; and finally, on the basis of the wire frame, adopting operations such as a filling curved surface, a cutting curved surface, a sweeping curved surface, an extrapolation extending, a bridging curved surface, a jointing curved surface and the like to generate an envelope curved surface of the beam. Optionally, for some types of glasses, the envelope curved surface can be further subjected to closed curved surface operation to generate a physical model of the cross beam; for other models, a pre-established standard beam model can be selected from a database in advance, and a target solid model of the beam is generated after positioning, scaling and affine transformation.

Step S35: and fixedly connecting and fusing the left and right mirror ring models into a whole according to the beam model. Firstly, according to the envelope curve of the beam in the step S34, the left mirror ring model and the right mirror ring model are fixedly connected and fused into a whole through stitching curve operation, and the envelope curve is the outer surface of the beam model at the moment; then, the joint of the left and right mirror rings and the cross beam is subjected to smooth treatment through chamfering operation, so that the left and right mirror rings and the cross beam are smoothly integrated; optionally, for the materialized beam model in S34, the left and right mirror rings are fixedly connected and fused into a whole through the beam by combining solid boolean operations such as trimming, adding and assembling; finally, pile head positioning base points are marked on the outer sides of the left and right mirror rings, and it is to be noted that the pile head positioning base points on the mirror rings are a datum point for pile head fusion positioning and are generally located at the middle position of the z-axis coordinate of the outer surface of the mirror ring, wherein the z-axis coordinate of the outer surface of the mirror ring is about 9mm, and therefore the working state of the mirror legs is approximately horizontal.

Step S36: and generating a lens mounting structure according to the eyeglass style and the lens parameters. Optionally, for the full-frame glasses, generating an annular lens mounting groove on the inner side surface of the lens ring through groove-type curved surface sweeping and solid segmentation operation or directly through grooving operation; for the half-frame glasses, the operations of circular sweep, combined trimming, entity addition, entity removal, hole creation and the like are performed to generate half-frame lens mounting structures, wherein the mounting structures comprise lens fixing ribs, fish-wire guide grooves, fish-wire holes and the like; for other glasses, the lens mounting structure with other shapes such as a stepped ring surface, an arc ring surface and the like can be formed or the inner side surface of the lens ring can be kept unchanged according to the requirement, and the glasses are not limited herein.

By combining the steps S31 to S36, preferably, the lens contour curve, the shaping sheet model, the rim model, some beam models and even the whole rim model can be used as relatively standardized modeling elements, and can be reused in different embodiments of the present invention, so that these standard modeling elements can be pre-established and stored in the feature structure database, and in the later design modeling process, the required graphics and models are directly selected from the feature structure database according to parameters such as style and size to perform rapid design modeling.

Referring to fig. 5, in step S4, the step of establishing a pile head model of the glasses by using the forward engineering method mainly includes: step S41, step S42, step S43, step S44, and step S45.

Step S41: and generating a pile head body sweeping guide line according to the eyeglass parameters and the style. Drawing a longitudinal sweeping guide line of the pile head according to the eyeglass parameters and the pile head patterns in the step S1, wherein the sweeping guide line is generally a quarter segment elliptical arc, and a starting point and a finishing point are respectively taken as a long axis vertex and a short axis vertex of the ellipse; optionally, the sweep guide line may be a combination of an arc, spline line, fold line, and different lines according to different pile head patterns, without limitation; in addition, considering that the post-treatment facilitates good fusion of the pile head and the rim, the sweep guide line generally extends about 10% outward from the origin.

Step S42: and designing the sweep cross section shape of the pile head according to the parameters and the style of the glasses. Determining the style of the pile head according to the parameters and style of the glasses in the step S1, and drawing the shape or contour curve of the transverse sweeping section of the pile head; alternatively, the swept cross-sectional shape may be U-shaped, T-shaped, E-shaped, O-shaped, C-shaped, rectangular, trapezoidal, oval, etc. according to different pile head patterns, without limitation.

Step S43: and generating a pile head body model according to the sweeping guide line and the section shape. Firstly, generating a shell curved surface or an envelope curved surface of the pile head through explicit curved surface sweeping operation according to the sweeping guide line of S41 and the sweeping cross-section shape of S42; then, generating a pile head body model through thick curved surface or closed curved surface operation; finally, the edge of the pile head body is smoothed through necessary chamfering operation.

It can be understood that for U-shaped, E-shaped and C-shaped cross sections, the pile head body will enclose the pile head transition reinforcing piece and the mirror ring to form a weight-reducing cavity, while for O-shaped, oval and trapezoidal cross sections, a tubular weight-reducing cavity will be directly formed, and for T-shaped and rectangular cross sections, a weight-reducing cavity will not be formed; in addition, it should be noted that the pile heads of several types are merely different in structure and shape, and have consistent structural strength and use function through proper parameter design.

Step S44: generating a front hinge and positioning base surface structure on the pile head body model. Firstly, creating hole characteristics at a preset position and a preset direction of the tail of the pile head to generate a front hinge structure for installing the glasses leg, wherein the front hinge corresponds to a rear hinge of the glasses leg and is short for the front hinge; secondly, the end face of the pile head and the pile tail is a sweep termination face, is an accurate plane characteristic, and can be used as a positioning base face for installing and working of the glasses leg after being subjected to chamfering modification; and finally, marking an assembly base point of the pile head, and generating a simulated mirror leg characteristic attached to the positioning base surface through graphic stretching operation.

It will be appreciated that for U, E and T sections, hole features may be created directly on the side walls or ribs on the pile head body to form the front hinge structure, while for other sections it is necessary to create hinge lugs at the head and tail and then to create hole features on the lugs to form the front hinge structure.

It should be noted that, the pile head assembly base point is the starting point of the pile head body sweeping guide line in S41, and generally coincides with the origin of the modeling coordinate system of the pile head, and is used as a positioning reference when the pile head and the mirror frame are fixedly connected and fused; the simulated glasses leg attached to the pile head positioning base surface is a hollow rod-shaped stretching ring surface in fact and is used for representing the pose and the local appearance of the real glasses leg at the auricle, and the simulated glasses leg is used as an auxiliary characteristic structure for pile head positioning and can be used for carrying out pose transformation along with the pile head during positioning.

S45: and storing the generated pile head model and parameters into a characteristic structure database. Preferably, the pile head model is a relatively standard modeling element of forward engineering design, and can be reused in different embodiments of the invention, so that various pile head models can be built in advance through the steps of S41 to S44 and stored in a characteristic structure database, and in the later design modeling process, the matched pile head model is directly selected from the characteristic structure database for standby according to parameters such as expected pile head style, size and the like.

It should be noted that, in this embodiment, the connection manner of the temple and the pile head adopts a hinge manner, and optionally, the connection manner of the temple and the pile head may also be a mortise-tenon connection manner, a spring connection manner, or a direct fusion and fixation connection manner, so that the connection structures of the pile head and the temple spleen head are different, and the invention is not limited.

Referring to fig. 6 and 10, in step S5, the step of establishing an adaptive nose pad structural model by using a reverse engineering method mainly includes: step S51, step S52, step S53, step S54, and step S55; step S51 to step S55 correspond to fig. 1 to fig. 5 in the graphical example of fig. 10, respectively.

Step S51: nose point cloud clipping and nose NURBS surface generation. Firstly, cutting out local point cloud data of a nose from the original point cloud data in S21; then, generating a nose NURBS curved surface model through the steps of point cloud optimization processing, gridding packaging, grid model optimization and accurate curved surface modeling.

In the processing procedure of this step, it is required to ensure that the point cloud, the grid model and the final NURBS curved surface model of the nose are always in the correct pose in the joint base coordinate system described in S26, that is, are completely matched with the entire head-face 3D model with the adjusted pose. Optionally, the nose NURBS surface model can also be cut directly from the generated head and face 3D-NURBS surface model to improve modeling efficiency.

Step S52: and generating a 3D contour line of the nose pad curved surface supporting leaf body according to the nose pad style. Firstly, determining a nose pad style according to the parameters, the style and the application scene of the glasses in the step S1, and drawing a parameterized standard nose pad outline graph. Secondly, stretching the contour graph according to a preset direction to generate a stretching curved surface, wherein the stretching curved surface is a 3D cutting ring surface; secondly, generating an intersecting curve of the 3D cutting ring surface and the nose NURBS curved surface through curved surface intersecting operation; and finally, further optimizing and smoothing the intersecting curve through curve commands such as a 3D fillet, a connecting curve, a projection curve, curve smoothing and the like to generate a 3D contour line of the final nose pad curved surface supporting blade body.

The above operation process is only one scheme for generating the 3D contour line of the curved surface supporting leaf body of the nose pad, and the scheme is suitable for the fan-shaped, butterfly-shaped, saddle-shaped integral nose pad and the circular, elliptic and egg-shaped split nose pad. Alternatively, other schemes may be used: firstly, drawing a parameterized skeleton graph according to a nose pad style or directly adopting a contour edge line of a mirror ring close to a nose as the skeleton graph; secondly, stretching the skeleton graph according to a preset direction to generate a stretching curved surface, or generating a sweeping curved surface by adopting display sweeping with the skeleton graph as a guide line; secondly, generating an intersecting curve of the stretching curved surface or the sweeping curved surface and the nose NURBS curved surface through curved surface intersecting operation; and finally, performing further transformation and deformation treatment on the intersecting curve through curve operation such as curve cutting, parallel curve, 3D circular arc, 3D circular angle, connecting curve, projection curve and the like to generate a 3D contour line of the final nose pad curved surface supporting blade body. The scheme is suitable for the split type nose pad of V-shaped, shoulder pole-shaped, hourglass-shaped and earphone-shaped integral nose pads and foot-shaped and traditional shapes.

It should be noted that, the above two solutions are only some embodiments of the present invention, the design modeling process of the present invention follows the design method of reverse engineering, and the design is based on the nose NURBS curved surface, and the finally generated 3D contour lines of the nose pad curved surface supporting leaf body are all 3D curves attached to the nose NURBS curved surface, so the design solutions conforming to the above features belong to the embodiments of the present invention.

Preferably, design elements such as a standard outline graph, a part of skeleton graph and the like have reusability, can be stored in a characteristic structure database after the design is finished, and can be directly used for customizing the design process after a target design element is selected from the database in the later design modeling process through proper lofting and scaling; in addition, the design modeling process is parameterized design modeling, and the final 3D contour line modeling can be adjusted by adjusting the graphics position, the stretching direction, the arc radius, the translation distance, the curve connection parameters, the sweep curve shape and other methods during or after the design is completed.

Step S53: and cutting out the curved surface of the curved surface supporting blade template according to the 3D contour line. And (3) cutting out the curved surface supporting blade body template curved surface from the nose NURBS curved surface model through curved surface segmentation operation according to the 3D contour line of the curved surface supporting blade body in the step S52. It can be understood that, for the integral nose pad, the template curved surface obtained by cutting is an integral curved surface, and for the split nose pad, the template curved surface obtained by cutting is a split curved surface, and the split curved surfaces are distributed left and right in pairs, can be one pair, can be two pairs or three pairs, and are equal, and the embodiment is not particularly limited.

Step S54: and generating a curved surface supporting leaf body model of the nose support according to the curved surface of the supporting leaf body template. Firstly, a curved surface supporting blade body model of a nose support is generated by translating a curved surface, stretching the curved surface, cutting the curved surface and closing the curved surface on the basis of a 3D contour line of the supporting curved surface supporting blade body and the curved surface of the curved surface supporting blade body template. Alternatively, the thick curved surface operation can be applied to the curved surface of the curved surface supporting blade template to directly generate the curved surface supporting blade model of the nose support; and then, each edge of the curved surface supporting blade body model is processed through a chamfering operation, so that the curved surface supporting blade body model with smooth appearance is generated.

Step S55: generating anti-skid patterns and ventilation holes on the curved surface supporting blade body according to the nose supporting style. Firstly, designing a parameterized geometric figure template of the nose support anti-skid pattern, scaling and adapting the parameterized geometric figure template, projecting the parameterized geometric figure template onto a curved surface of a nose support curved surface support blade template, and generating an anti-skid pattern structure through grooving or rib operation; secondly, designing a parameterized geometric figure template of the nose pad ventilation hole, scaling and adapting the parameterized geometric figure template, projecting the parameterized geometric figure template onto the curved surface of the nose pad curved surface and generating a ventilation hole structure through operations such as grooves, holes, hollows and the like.

Alternatively, the geometric figure templates of the anti-skid patterns and the ventilation holes can be directly generated on the curved surface of the curved surface supporting blade template through operations such as intersecting of the stretching curved surface, side line translation, curve cutting, rolling deviation and the like; in addition, the number and shape of the anti-skid patterns and the ventilation holes can be any number and shape, the embodiment of the invention is not limited, and the layout of the anti-skid patterns and the ventilation holes can be left-right layout, up-down layout, symmetrical layout, random layout or other layout modes, and the invention is not limited.

Preferably, design elements such as geometric pattern templates and design parameters of the anti-skid patterns and the vent holes have reusability, the design elements can be stored in a feature structure database after the design is completed, target elements can be selected from the database in the later design modeling process, and the target elements can be directly used for customizing the design modeling process after proper lofting and scaling.

The step S51 to the step S55 are combined, the generated adaptive nose pad structural model adopts a reverse engineering method and is based on nose original point cloud data, and because the human face and the nose are not absolutely symmetrical, the finally generated adaptive nose pad curved surface pad leaf body is not absolutely symmetrical but approximately symmetrical, so that the adaptability of the adaptive nose pad structural model to the curved surface structure of the nose of a user is optimal, thereby providing good supporting and positioning functions for the whole glasses, fully embodying the customizing characteristic and the ergonomic characteristic of the invention, and being a core innovation point of the invention.

In addition, the adaptive nose pad is only one ergonomic structure of the invention, and in practice, according to application scenes and user requirements, several optional ergonomic structures of the orbit support body, the sweat blocking strip, the cheekbone support body and the temporal support body can be integrated, and the design thought, the modeling method and the structural form of the adaptive nose pad are completely similar to those of the adaptive nose pad, so that the functions and the ergonomic characteristics of the glasses are further enhanced.

Referring to fig. 7, in step S6, the step of establishing an integrated mirror model by using a hybrid modeling method of forward and reverse engineering mainly includes: step S61, step S62, step S63, step S64, step S65, and step S66.

Step S61: three-gesture positioning of the integral mirror frame and positioning of the nose support curved surface supporting blade body. The integral mirror frame model, the curved surface support blade model of the nose support and the head and face 3D model of the user are ensured to be correctly positioned in the joint base coordinate system described in S26, namely, the head and face 3D model is in a set modeling pose, the mirror frame model is in a preset three-pose, and the curved surface support blade model is in a pose which is accurately matched and attached with the nose of the head and face 3D model.

Step S62: the type, style and modeling parameters of the nose pad support structure are determined. Determining the type and style of the nose pad support structure and related design parameters according to the style of the glasses, the nose pad style and the preference of a user; the type and the style of the nose pad supporting structure body comprise supporting side wings, supporting skirt edges, supporting sheets, supporting stems and a fusion type supporting structure, wherein the fusion type supporting structure is complex, and the nose pad curved surface supporting leaf body is respectively fused and fixedly connected with the cross beam and the left and right mirror rings by adopting a transition curved surface structure body; modeling parameters for the nose pad support structure include position, size, length, width, thickness, diameter, etc.

Step S63: the modeling of the nose support structure and the connection fusion of the curved surface supporting blade body and the mirror frame. Firstly, according to the type, style and design parameters of the nose pad supporting structure, operations such as sweeping, intersecting, fillet, connecting curve, segmentation, curved surface bridging, curved surface filling and the like are adopted to establish a connecting curve or a connecting curved surface from a curved surface pad blade body to a mirror ring and/or a cross beam; secondly, generating a nose support structure model by adopting circular sweep, a thick curved surface, a closed curved surface and other operations on the generated connecting curve or the connecting curved surface; secondly, through solid Boolean operations such as adding, assembling and combined trimming, the curved surface supporting leaf body of the nose support in S5 is fixedly connected and fused with the integral mirror frame in S3 through a nose support supporting structure; and finally, carrying out smooth transition treatment on the generated edge and entity joint through chamfering operation.

The nose pad supporting structure has the functions of fixing the curved surface blade supporting body structure to the cross beam and/or the left and right glasses rings of the integral glasses frame, keeping the relative pose of the curved surface blade supporting body structure and the left and right glasses rings stable and unchanged, so that the nose pad supporting structure has the functions of adapting and bridging, is a completely customized structure, namely the geometric shapes of the nose pad supporting structures of the same style of glasses of the same style are similar, but the structural parameters are not completely the same, even the left and right parts of the nose pad supporting structures in the same pair of glasses are not absolutely symmetrical, only approximate symmetry can be achieved, and the purpose of the nose pad supporting structure is to accurately adapt to the non-absolute symmetry of the nose structure of a human face.

Step S64: and generating a vent hole structure on the nose pad supporting structure body according to the style of the glasses. Firstly, designing a parameterized geometric figure template of a vent hole according to the style of glasses, scaling and adapting the parameterized geometric figure template, and then projecting the parameterized geometric figure template onto a connecting curved surface for constructing a nose support supporting structure; then, the vent hole structure is generated through the operations of grooves, holes, hollows and the like. It will be appreciated that vent structures are suitable for support wings, support skirts, support sheets and fused support structures having a certain side area, and are not suitable for support stem structures of a slim stem shape.

Alternatively, the graphic template of the vent hole can be directly generated on the connecting curved surface of the nose support structure through the operations of stretching the intersection of the curved surfaces, side line translation, curve cutting, rolling offset, circular curve and the like; preferably, modeling elements such as geometric pattern templates and design parameters of the vent holes have reusability, the modeling elements can be stored in a feature structure database after the design is completed, and in the later design modeling process, target modeling elements can be selected from the database and directly used in the design modeling process after proper lofting and scaling.

It should be noted that, for several optional ergonomic components of the orbit support, the sweatband, the cheekbone support and the temporal support, all are connected to the rim and/or the cross beam by corresponding support structures, the design concept, the modeling method and the structural form are completely similar to those of the nose pad support structure.

Step S65: and determining the adaptive pose of the pile head according to the head-face 3D model and the mirror frame pose. Firstly, loading a head-face 3D-NURBS curved surface model, an integral mirror frame model and a pile head model in a joint base coordinate system, and ensuring that the head-face 3D model is in a set modeling pose and the mirror frame model is in a preset three-pose; secondly, locking the position and the posture of the integral mirror frame to be unchanged, and carrying out translation transformation on the pile head model to enable the assembling base point of the pile head in the S44 to coincide with the pile head positioning base point on the mirror ring in the S35; and finally, taking the positioning base point as a rotation base point, and adjusting the rotation conversion angle of the pile head around the y axis and the z axis through the rotation conversion operation of an entity, so that the simulated mirror leg attached to the pile head is contacted and tangent with the curved surface of the upper auricle part, and the effect of good adaptation is achieved.

Step S66: and (3) generating a transition reinforcing sheet, and fixedly connecting and fusing the pile head and the mirror frame. Firstly, extracting an outer contour side line of a lens ring near a pile head; secondly, drawing a proper sweep profile curve, and carrying out explicit sweep by taking the extracted rim outer profile edge line as a sweep rate guide line to generate an original curved surface of the pile head transition reinforcing sheet; secondly, obtaining an intersecting curve of the pile head model and the original curved surface of the transition reinforcing sheet through intersecting operation of the pile head model and the original curved surface of the transition reinforcing sheet, and performing series of operations such as connection, round angle, segmentation, projection, joint and the like on the intersecting curve and the rim outer contour line to generate a 3D contour curve of the transition reinforcing sheet; secondly, cutting the original curved surface of the transition reinforcing sheet according to the contour curve of the transition reinforcing sheet through a cutting operation to obtain a template curved surface of the transition reinforcing sheet; secondly, generating a pile head transition reinforcing sheet model through thick curved surface operation according to the curved surface of the transition reinforcing sheet template; finally, the pile head, the transition reinforcing sheet and the mirror frame are fixedly connected and fused into a whole through joint trimming operation.

It should be noted that, the sweep profile curve of the original curved surface of the generated transition reinforcing sheet generally consists of a section of arc and a straight line, and according to different pile head patterns, the sweep profile curve can also be in different forms such as spline lines, whole sections of arc, etc., so long as the function, strength and structure of the generated pile head transition reinforcing sheet are ensured to meet the requirements, and the sweep profile curve is not limited here; the shape and the size of the transition reinforcing sheet are matched with the pose, the style and the shape of the pile head so as to achieve the effect of attractive and compact appearance; for some types of pile heads, such as T-shaped and O-shaped section pile heads, the shape and size of the transition reinforcing piece can be designed according to standard specifications in advance due to good adaptability, so that the modeling process is simplified.

Combining the steps S61 to S66, wherein the integrated mirror body comprises an integral mirror frame, an adaptive nose support, a nose support supporting structure body, left and right pile heads, pile head transition reinforcing sheets, optional eye socket supporting bodies and other ergonomic structures; the design thought and modeling method related to the nose support body, pile head transition reinforcing sheet and the like are specific application of the forward and reverse engineering hybrid modeling method, and are important manifestations of guarantee and innovation of ergonomic characteristics and customization characteristics.

Referring to fig. 8 and 11, in step S7, the step of establishing an adaptive temple model by using a hybrid modeling method of forward and reverse engineering mainly includes: step S71, step S72, step S73, step S74, step S75, step S76, and step S77; step S72 to step S77 correspond to fig. 1 to 6 in the graphical example of fig. 11, respectively.

Step S71: and determining the materials and geometric elements of the glasses legs according to the styles and the use scenes of the glasses. Firstly, determining manufacturing materials of the glasses legs according to the styles and the use scenes of the glasses; and secondly, determining design geometric factors of the glasses leg according to mechanical properties such as rigidity and strength of manufacturing materials and a cantilever beam theory, wherein the design geometric factors comprise factors such as the cross-sectional size and gradual change strategy of the glasses leg, the cross-sectional shape, the lofting coefficient, the shape of a flexible line of the spleen body section of the glasses leg and the like.

Step S72: the spleen axis and each cross-sectional shape are generated according to the geometric factors of the glasses legs. Firstly, generating a first axis and a second axis of the spleen body of the glasses leg, wherein the first axis is generally a straight line, the pile head points to the position of the upper auricle, the second axis is generated by superposing corresponding deflection on the first axis according to the deflection line in S71, and the first axis and the second axis can be approximated by a section of spline in actual operation; secondly, a certain number of equally dividing is carried out on the first axis and the second axis respectively, and then an equally dividing point plane perpendicular to the first axis and the second axis is established at each equally dividing point; finally, drawing each cross-section graph of the spleen body on each bisector plane, and gradually reducing the size from the head to the tail of the spleen.

It should be noted that, the lengths of the first axis and the second axis are the same, which is that the distance from the upper auricle position to the pile head positioning base surface in S65 is further prolonged by about 10%; the first axis is the axis when the spleen body is deformed and straightened due to the fit of the ears when the glasses are worn, the second axis is the actual pre-deformation axis of the spleen body, and the design purpose is to generate certain clamping force when the glasses are worn; optionally, the first axis may be designed as a slightly curved arc to better adapt to the shape of the head, the number of the first axis and the second axis can be equal to 8 to 15 according to the needs, and the cross section of the spleen body is generally in a rounded rectangle, but according to different temple styles and user preferences, the first axis can be designed as a rounded square, a round shape, an oval shape and other different shapes, so long as the requirements of functions and performances are met, and the invention is not limited.

Step S73: and generating the spleen body model of the adaptive mirror leg according to the axis and the cross-sectional shape of the spleen body. Firstly, taking the first axis in the step S72 as a guide line and a sweep ridge line, and generating a verification spleen body model through multi-section entity operation according to the corresponding section graph cluster; next, the second axis in S72 is used as a guide line and sweep ridge line, and an actual spleen body model is generated by a multi-section solid operation according to the corresponding section pattern cluster.

The verification that the spleen body model is a simulation model of the true glasses leg after the spleen body is deformed and straightened can be used for analyzing the suitability of the deformed glasses leg and ears, and can also be used for a virtual try-on link, and the actual spleen body model is superimposed with deflection pre-deformation and is a model based on the actual processing and preparation of the glasses leg.

Step S74: the rear hinge structure of the spleen head part and the limit basal plane structure are generated. Firstly, drawing a contour graph of a rear hinge lug at one end of a spleen body close to a pile head; secondly, directly attaching to the spleen body model through thick curved surface operation to generate a rear hinge lug; secondly, forming rear hinge holes on the rear hinge lugs at positions corresponding to the front hinge holes of the pile head through hole opening operation; finally, the spleen body model is generated through multi-section solid operation, and the end face of the head of the spleen body is an accurate plane, and is used as a limiting base surface for installing and working of the glasses leg after rounded corner trimming.

It should be noted that, the spleen head includes back hinge and spacing basal plane structure, and wherein back hinge is abbreviated as back hinge, including hinge tab and hinge hole, the back hinge of spleen head will be with the preceding hinge accurate hinge assembly of stake head when glasses are assembled, and the spacing basal plane of spleen head will be fit with the location basal plane of stake head when glasses are worn.

Step S75: generating the axis of the spleen tail and each section shape according to the curved surface structure of the rear auricle root. Firstly, collecting a plurality of characteristic points according to the curved trend and the structure of the rear auricle part; secondly, generating a 3D spline according to the characteristic points through spline operation fitting, and performing fairing optimization on the spline through fine adjustment of the position of the characteristic points and curve fairing operation; secondly, carrying out halving on the spline line again, and then establishing a plane perpendicular to the axis at each halving point to form a group of halving point planes; finally, the splenic tail cross-sectional shape is drawn on each bisecting plane, with the cross-sectional shape generally being circular.

Optionally, the number of the characteristic points is generally 6 to 12 according to the size of the ear, and the trend and the structure of the curved surface of the rear auricle can be fully described; the number of the halving points is generally 6 to 12, and preferably, the halving points can generate smooth splenic tail entities; the cross section of the splenic tail can also be a rounded rectangle, a rounded trapezoid and the like, and the cross section with more accurate suitability can be generated by solving the intersection line of each bisector plane and the curved surface of the auricular root outline.

Step S76: generating a splenic tail model according to the splenic tail axis and each section shape. Firstly, generating an envelope curve of the spleen tail through multi-section curve operation according to the axis of the spleen tail and the shapes of all sections; secondly, generating a spleen tail model through closed curved surface operation; finally, carrying out fairing treatment on the tail end of the spleen tail model through chamfering operation; it can be understood that the appearance and the function of the spleen tail of the invention are similar to those of the foot cover of the traditional glasses and are used for hooking ears and positioning the glasses, but the spleen tail structure of the invention has the ergonomic characteristic and has better suitability and stability; preferably, a soft material coating layer is designed on the outer surface of the spleen tail so as to further increase friction force and comfort.

Step S77: cutting and fixedly connecting the spleen body and the spleen tail model into a whole. First, at the upper auricle position of the actual spleen body model in S73, the end portion is cut out by a dividing operation; secondly, also in the position of the auricle on the splenic tail model in S76, the front end portion is cut off by the dividing operation; secondly, after the position and the pose of the spleen body and the spleen tail are accurately matched, the spleen body and the spleen tail are fixedly connected and fused into a whole through assembly or entity Boolean operation, and an actual glasses leg model for manufacturing is generated; and finally, adopting the same steps, and generating a verification mirror leg model for adaptation detection and virtual try-on after cutting, matching and fixedly connecting fusion operations are carried out on the corresponding verification spleen body model and the corresponding verification spleen tail model.

In the case of preparing the spleen body and the spleen tail by adopting nonmetallic materials, the spleen body and the spleen tail are integrally formed by adopting a fusion design method and adopting flexible manufacturing methods such as 3D printing, numerical control processing and the like in the preparation process; for the case that the spleen body is made of metal materials and the spleen tail is made of nonmetal materials, the spleen head, the spleen body and the spleen body adopt alternative design modeling and preparation schemes: the structure of the spleen body and the design modeling flow are basically unchanged, the rear part of the auricle on the spleen body needs to be designed into a traditional tail needle structure, the rear hinge of the spleen head is designed and prepared according to the traditional method, the spleen tail is still designed and modeled according to the steps from S75 to S77, but a corresponding tail needle hole structure is added.

Combining the steps S71 to S77, wherein the design of the spleen body is based on the theory related to cantilever beam and material mechanics, the section is gradually reduced from large to small, the pre-deformation of the axis refers to the shape of a flexible line, and the adaptive glasses leg prepared by adopting the scientific design method can generate more accurate and reasonable deformation and more suitable clamping force when being worn; in addition, the adaptive mirror leg model adopts a forward and backward engineering hybrid modeling method and is based on a 3D model of the head and the face of a user and an integrated mirror body model, and the shape and the position of the ears of a human body are not absolutely symmetrical, so that the finally generated adaptive mirror leg model is not absolutely symmetrical but approximately symmetrical, but is optimal in adaptation with the ears and the head and face structures of the user, thereby providing more excellent supporting and limiting functions for the whole glasses, fully embodying the custom characteristic and the ergonomic characteristic of the invention, and being another core innovation point of the invention.

It should be noted that, the steps S3, S4, S5, S6 and S7 are not performed in strict sequence, and there are design intersections in the steps; the step S3 and the step S4 adopt a forward engineering parameterized modeling strategy, the step S5 adopts a reverse engineering parameterized modeling strategy, and the step S6 and the step S7 adopt a modeling strategy of mixing forward engineering and reverse engineering and parameterizing. The forward engineering can adopt mature professional modeling software such as Catia, UG, proE and the like, the reverse engineering adopts mature technologies such as 3D scanning, stereoscopic vision, camera arrays and the like and mature data processing modeling software such as Geomagic, imageware and the like, the forward engineering and reverse engineering mixed modeling is the fusion of the forward engineering and the reverse engineering technologies, the comprehensive application of the technologies is the fundamental guarantee of the customization and the ergonomic characteristics of the invention, and the suitability and the comfort of the finished glasses can be greatly improved.

In addition, the invention also has three advanced modeling support technologies, namely a parameterized modeling, a modeling database and an automatic modeling service program. The main idea of parametric modeling is that by utilizing the parametric modeling function of Catia software, various glasses parameters, style information, geometric form factors, parameter calculation formulas, material characteristic data and the like are fused into a model as design input data at the beginning of modeling, and the structure and the size of the model can be automatically adjusted or new models with different shapes and sizes can be generated by adjusting and modifying the input parameters during and after the model is built; the main idea of the modeling database is that a characteristic structure database is built for relatively standard and general design elements and generated reusable models, so that target elements and models can be directly selected from the database to participate in modeling in the later modeling process; preferably, an artistic material database and the like can be established, so that efficient support is provided for the beautification and decoration of the later-period glasses; the main idea of the automatic modeling service program is that a design modeling service program is developed based on secondary development interfaces of modeling software such as Catia/CAA, UG/NX Open and the like, and 3D design modeling processes such as parameter-driven feature modeling, model adaptation, model adjustment, model transformation, entity fusion and the like are automatically completed through a computer; the three modeling auxiliary measures greatly improve the efficiency and quality of the customized design modeling, improve the automation degree and simplify the manual workload, thereby being an important innovation and feature of the invention.

Referring to fig. 9, the ergonomic eyeglass design and manufacturing method further includes step S8, model verification and physical manufacturing of the eyeglass. The step S8 mainly comprises the following steps: step S81, step S82, step S83, step S84, and step S85.

Step S81: and the whole glasses model is decorated and artistic beautified. Firstly, extracting elements such as hollowed-out patterns, carved textures, artistic fonts, logo, decorative entities and the like from an artistic material database according to the styles of glasses and the preference of users; secondly, artistic elements are carved or attached to proper positions of the integrated mirror body and the adaptive mirror leg through affine transformation, graphic projection, rolling offset, boss, slotting and thick curved surface operation, addition, removal, combined trimming and other solid Boolean operation.

Step S82: and (5) detecting virtual assembly and suitability of the whole glasses model. Firstly, loading a head face 3D-NURBS curved surface model, an integrated mirror model, a verification mirror leg model and a shaping sheet model in a joint base coordinate system, and ensuring that the head face 3D model is in a set modeling pose and the integrated mirror model and the shaping sheet model are in correct three-pose; secondly, assembling the left and right glasses legs and the glasses body together through the constraint relations of the fitting function of the parts and the contact between the pile head positioning base surface and the spleen head limiting base surface, and the like, so as to form a complete glasses model; and finally, detecting the adapting degree of the head and face 3D model, the mirror body model and the mirror leg model and the problems of interference, collision, dislocation and the like in a computer, and if the problems exist, returning to the corresponding design flow to carry out iterative modification.

Step S83: virtual try-on and aesthetic evaluation of the overall eyeglass model. Firstly, according to the preference and selection of a user, giving materials and rendering surfaces to the whole glasses model in S82 to obtain a simulation 3D model approximating reality; then, acquiring head and face images of a user in real time, and matching and fusing the glasses model and the head and face images of the user in an interactive mode to realize virtual try-on, wherein the user can evaluate the wearing effect; finally, the user completes virtual try-on and aesthetic evaluation, if the user gives feedback comments of modification and optimization, the corresponding design modeling link is returned to carry out iterative modification, so that a closed-loop feedback design flow is formed, and the preparation stage is carried out until the user is satisfied.

Step S84: and (3) preparing the integrated mirror body and the adaptive mirror leg. Firstly, preparing an integrated mirror body integrally according to an integrated mirror body model; secondly, preparing left and right temples and left and right shaping sheets according to the actual temples model and the shaping sheet model; finally, after the processing of each part of the glasses is finished, necessary polishing and polishing treatment is carried out, and optionally, surface treatment such as paint spraying, coloring and the like can be carried out according to the requirements and the preference of users.

Step S85: preparation of lenses and assembly delivery of physical spectacles. Firstly, taking the shaping sheet in S84 as a template and parameters such as pupil distance, pupil height and the like as inputs, and carrying out automatic cutting and polishing processing through a lens edging machine to prepare a finished lens; preferably, the 3D digital model of the shaping sheet in the step S31 and pupil coordinates can be input into a novel digital lens edging machine for direct polishing and processing to prepare a finished lens; secondly, assembling the prepared lens, the integrated lens body and the adaptive lens legs to form finished spectacles, wherein the lenses are optionally arranged on the full-frame spectacles through lens mounting grooves, and the lenses are arranged on the half-frame spectacles through lens fixing ribs, fishing line guide grooves, fishing line holes and the like; finally, after the trial wearing and quality evaluation of the finished glasses, delivering the finished glasses to users, and completing the whole glasses preparation and matching process.

Combining the steps S81 to S85, based on the design ideas of customization, ergonomic characteristics and integrated structures, the integrated mirror body, the adaptive mirror leg and other accessories are mainly manufactured in a flexible processing mode such as 3D printing, numerical control processing and laser engraving, and the like, and the integrated mirror body and the adaptive mirror leg are manufactured integrally at one time without redundant processing and assembly; the assembly of the whole glasses only needs to assemble three parts of the integrated glasses body, the adaptive glasses legs and the lenses together, the assembly steps are simple and efficient, the precision of the glasses is high, the structure is simple, the functions are not lost, the manufacturing method is greatly different from the manufacturing method of the existing glasses mainly based on traditional mechanical processing, and the method is also an important innovation point of the manufacturing link.

Referring to fig. 12 and 13, an embodiment of the present invention further provides an ergonomic glasses 100, which is manufactured by the ergonomic glasses design and manufacturing method according to any of the foregoing embodiments. The ergonomic eyeglass 100 comprises a frame and lenses, the frame comprising an interconnected integrated temple 110 and an adapter temple 140, the integrated temple 110 comprising an integral frame 120, a stake head 111, a transition piece 112, an adapter nose pad 130, and optionally other ergonomic structures including at least one of an orbit support, a sweat band, a cheekbone support, and a temporal support. The integral mirror frame 120 comprises a left mirror ring 121, a right mirror ring 122, a beam 122, a strength enhancing ring 123, a lens mounting groove 124 and a shaping sheet 125, and the adaptive nose pad 130 comprises a curved surface pad body 131, a nose pad supporting sheet 132, ventilation holes 133, anti-slip patterns 134 and ventilation holes 135. The adapter temple 140 includes a splenic head 141, a splenic body 142, and a splenic tail 143.

In summary, the ergonomic glasses design and preparation method and the ergonomic glasses 100 provided by the embodiments of the present invention have the following beneficial effects:

the design and preparation method of the ergonomic glasses and the customized ergonomic glasses finished product provided by the embodiment of the invention have the advantages that the customized adaptive nose pad structure can be perfectly attached to the nose of a human face, the supporting area is greatly increased, and the problems of small size, poor attaching property, poor supporting property, skin pressing, easy sliding, uncomfortable pain points and the like of the traditional nose pad can be thoroughly solved; the customized adaptive glasses leg can be perfectly attached to the auricle part of the user, the contact area is greatly increased, and the problems that the traditional glasses leg is not matched in length, the ear is not hooked firmly, the first pain point is not held and the like are thoroughly solved. In general, the customized and integrated mirror body structure is further integrated with proper nose pads, adaptive mirror legs, optional eye socket supporting bodies and other ergonomic structures, so that the overall supporting stress condition of the glasses and the adaptation problem of the appearance of the glasses and the head and face structures are greatly improved and optimized, the problems of loose and smooth movement, poor stability, inaccurate positioning, poor comfortableness and the like of the conventional glasses can be thoroughly solved, the use effect of sliding-free, shifting-free and noninductive wearing can be achieved, and good wearing quality and use experience are brought to users. Particularly, for the vision correction glasses widely used, the size and shape of the glasses prepared by the invention can be accurately matched with the face and head structures, and the three postures of the glasses can be ensured to well meet the design requirements when the glasses are worn, so that the optical axes of lenses and the visual axes of eyes can be ensured to be accurately matched, and dynamic deviation is avoided, the vision correction quality of the optical glasses is greatly improved, and the side effects of dizziness, nausea, blurred deformation of the visual field, even vision decline, degree increase, internal and external strabismus and the like of the existing myopia glasses are basically eliminated.

Thanks to the three more advanced modeling support techniques of the present invention: the parameterized modeling, the modeling database and the automated modeling service program and the guiding ideas of full digitalization, data multiplexing and simplified structure throughout the design modeling process greatly improve the efficiency and quality of the customized design modeling and even the whole glasses preparation process, improve the automation degree and simplify the manual workload, thereby fundamentally changing the low-efficiency lagging modes of the traditional glasses manual design, normalized design, two-dimensional design and two-dimensional drawing. The customization and personalized design process of the real-time participation of the user and the feedback iterative optimization process based on the virtual assembly and virtual try-on enable the complex and low-efficiency lens matching process of the prior glasses to be completely integrated into the customization design preparation process of the glasses in the embodiment, which greatly simplifies or completely omits complex and low-efficiency links such as repeated selection, measurement, processing, assembly, try-on, debugging and evaluation feedback in the traditional lens matching process, thereby completely avoiding adverse factors such as experience, skill, emotion, manual measurement error, operation stability and the like of a lens matching technician, directly preparing a finished product meeting aesthetic, personalized and fashionable requirements of the user, and completely meeting the requirements of the user in terms of structure, layout, style, decorative and cosmetic effects and the like, saving the user time and bringing brand-new lens matching experience to the user.

Based on the technology such as ergonomic technology, 3D design modeling technology and customized flexible manufacturing, can directly prepare two kinds of high integration structure of integration mirror body that have fused structures such as mirror circle, crossbeam, adaptation nose holds in the palm, integrated pile head and have fused hinge, spleen head, spleen body and spleen tail's adaptation mirror leg, saved a large amount of processing assembly steps to the precision of glasses whole and each spare part has been promoted. Compared with the prior glasses, the assembly and debugging process is greatly simplified, and the glasses have the advantages of simple structure, firmness, durability, excellent quality, low failure rate, accurate positioning and the like; secondly, the problems of complex and complicated production process, fine and complex structure, tiny and various spare parts, various materials and the like of the traditional glasses can be avoided; and moreover, the standardized, normalized, batched and decentralized production modes of the conventional glasses can be changed, and the inherent problems of unstable quality, high derivative cost, no customization, high maintenance difficulty and the like of the glasses are greatly improved.

In the whole design preparation link, user demands are fully collected, user use scenes are analyzed, the customization and personalized design processes of later-stage user real-time participation and feedback iteration optimization processes based on virtual assembly and virtual try-on can be performed, and targeted specialized ergonomic glasses 100 with different structures and characteristics, such as child optical glasses, student optical glasses, indoor office glasses, outdoor glasses, sports glasses, swimming glasses, skiing glasses, sunglasses, cosmetic decoration glasses, protective glasses and the like, can be tailored for different application scenes of the user.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An ergonomic eyeglass design and method of making comprising:

2. The method for designing and manufacturing ergonomic glasses according to claim 1, wherein in step S1, the step of determining parameters and styles of glasses comprises:

s11: analyzing the functional requirements and the use scenes of the user;

s12: determining the diopter, astigmatism and interpupillary distance of eyes of a user through optometry;

s13: determining parameters of the lens according to the functional requirements and the use scenes of the user and the optometry result; wherein the parameters of the lens comprise material, thickness and base curve of the lens; if the glasses are optical glasses, the parameters of the lenses further comprise degrees, refractive indexes, abbe numbers and bending degrees;

s14: and determining three postures, structural parameters and style information of the glasses according to the results of the steps S11, S12 and S13, wherein the parameters of the three postures comprise the front inclination angle, the mirror surface angle and the eye distance of the glasses.

3. The ergonomic glasses design and manufacturing method according to claim 2, wherein in step S2, the step of head-face reverse engineering 3D modeling and data processing includes:

s21: acquiring original point cloud data of a user head face appearance structure by adopting a reverse engineering technology;

s22: denoising, filtering, cutting, sampling, aligning and registering the original point cloud data in the step S21 to form orderly and convenient-to-process global point cloud data, and gridding and packaging the global point cloud data to generate a 3D grid model of the user head and face;

S23: performing grid doctor trimming, noise reduction, relaxation, hole repairing and smoothing treatment on the whole 3D grid model in the step S22 to generate a smooth and complete 3D grid model, and performing relaxation and abrasive paper polishing smoothing treatment on the eyebrow and the unsmooth area around the eyes in the 3D grid model;

s24: the 3D grid model generated in the S23 is subjected to a plurality of manual modeling operations such as curvature line extraction, curved surface sheet construction, moving panel construction, grid construction and curved surface fitting or automatic curved surface modeling operation is directly adopted, so that an accurate and smooth 3D-NURBS curved surface model of the user head and face part is generated;

s25: the characteristic points of the pupil, the inner and outer corners and the upper auricle are detected by combining an artificial intelligence algorithm of face recognition and characteristic detection with a stereoscopic vision technology, coordinates of the pupil, the inner and outer corners and the upper auricle are calculated respectively, and parameters of the pupil distance, the temporal width and the auricle width are further calculated;

s26: and (3) carrying out positioning matching on the characteristic points in the step (S25) and the head and face part 3D-NURBS curved surface model in the step (S24), and establishing a joint base coordinate system of glasses modeling and the head and face part 3D model as a reference coordinate system of three-gesture and subsequent design modeling of the glasses according to the characteristic points and the 3D-NURBS curved surface model.

4. The method for designing and manufacturing ergonomic glasses according to claim 3, wherein in step S3, the step of creating the overall frame model of the glasses by using the forward engineering method comprises:

s31: designing a lens contour curve according to the use scene and the parameters of the lens, and generating a shaping sheet model by stretching the lens contour curve, generating a spherical surface, and performing combined trimming and closed curved surface series operation;

s32: generating left and right mirror ring models according to the lens contour curve and the lens base curve, and firstly, performing assembly tolerance lofting on the lens contour curve to generate a mirror ring contour; then, generating a left mirror ring model through curve stretching, curve joint trimming and thick curve modeling operation according to the parameters of the base curve, the mirror ring thickness and the mirror ring height of the lens; finally, after optimizing the left mirror ring model, generating a symmetrical right mirror ring model through entity mirror image operation;

s33: according to the three postures and pupil coordinates of the glasses, in the joint base coordinate system in S26, the left and right mirror circles are transformed to preset postures, and firstly, according to pupil coordinates and mirror distance parameters, the left and right mirror circles are respectively transformed to corresponding positions through translation transformation; secondly, respectively carrying out sweepback rotation transformation on the left and right mirror rings according to the mirror angle; finally, the left and right mirror rings are used as a whole to perform forward tilting rotation transformation according to the forward tilting angle;

S34: according to the left and right mirror ring models, the left and right mirror ring pose and the beam style and geometric parameters corresponding to the glasses style selected by the user, adopting curve operation of side line extraction, curve connection, round angle, projection, segmentation and joint and curve operation of filling, sweeping and extrapolation extension, establishing an envelope curve model of the beam or further generating a beam entity model through closed curve operation;

s35: according to the envelope curved surface of the cross beam or the solid model of the cross beam, the models of the left and right mirror rings are fixedly connected through the cross beam through stitching curved surface operation or joint trimming, adding and assembling solid Boolean operation, the joint parts are smoothly transitionally fused into a whole to form an integral mirror frame model, and finally pile head positioning base points are marked on the outer sides of the left and right mirror rings;

s36: generating a lens mounting structure according to the eyeglass style and the lens parameters; if the glasses adopt a full frame structure, generating an annular lens mounting groove on the inner side surface of the lens ring through groove-shaped curved surface sweeping and entity dividing operation or directly through grooving operation; if the glasses adopt a half-frame structure, the half-frame lens mounting structure is generated through circular sweeping, combined trimming, entity adding, entity removing and hole creating operations, and the lens mounting structure comprises lens fixing ribs, a fishing line guide groove and a fishing line hole.

5. The method for designing and manufacturing ergonomic glasses according to claim 4, wherein in step S4, the step of creating the pile head model of the glasses by using the forward engineering method comprises:

s41: determining a longitudinal sweeping guide line of the pile head according to the parameters and the style of the glasses in the step S1, wherein the style comprises the pile head style, the sweeping guide line is a quarter segment elliptic curve, and a starting point and a finishing point are respectively taken as a long axis vertex and a short axis vertex of the ellipse;

s42: drawing a transverse sweep cross section shape or profile curve of the pile head according to the eyeglass parameters and pile head patterns, wherein the cross section shape or profile curve can be designed into different shapes according to different pile head patterns;

s43: according to the sweep guide line in S41 and the contour curve in S42, an explicit sweep modeling operation is adopted to establish a pile head body shell curved surface, and then a thick curved surface modeling method is adopted to act on the shell curved surface to form the pile head body structure;

s44: generating the front hinge of the pile head by adopting hole characteristics and rounding modeling operation in the preset position and direction of the tail of the pile head body, then taking the end face of the tail of the pile head body as a positioning base surface for assembling and working of a glasses leg, generating simulated glasses leg characteristics attached to the positioning base surface by graphic stretching operation, and finally marking an assembling base point of the pile head, wherein the assembling base point is a modeling base point;

S45: and (3) establishing pile head models of various types according to parameters and styles of various glasses in advance, and storing the pile head models into a characteristic structure database in the steps of S41 to S44, wherein in the later design modeling process, the preset pile head models can be directly selected from the characteristic structure database according to the pile head styles and sizes for rapid modeling.

6. The method for designing and manufacturing ergonomic glasses according to claim 4, wherein in step S5, the step of establishing the adaptive nose pad model by using the reverse engineering method comprises:

s51: cutting and intercepting local point cloud data of a nose from the original point cloud data in the step S21, and then generating a NURBS curved surface model of the precise fairing of the nose through point cloud denoising, sampling, gridding packaging, gridding doctor optimizing, fairing processing and precise curved surface reconstruction;

s52: selecting or newly creating a contour graph of a nose pad curved surface supporting leaf body from a characteristic structure database according to the parameters and the style of the glasses in the S1, wherein the style comprises a nose pad style, and then stretching the contour graph according to a preset direction to generate a 3D cutting ring surface, wherein the intersection line of the cutting ring surface and the NURBS curved surface of the nose in the S51 is the 3D contour line of the nose pad curved surface supporting leaf body;

S53: adjusting, optimizing, smoothing and scaling the nose pad curved surface supporting leaf body according to the 3D contour line of the nose pad curved surface supporting leaf body in the step S52, and then cutting the nose pad curved surface supporting leaf body from the NURBS curved surface of the nose in the step S51 through a cutting operation to obtain a nose pad curved surface supporting leaf body template curved surface;

s54: generating an adaptive nose pad curved surface supporting blade body model through translational curved surface, tensile curved surface, cutting curved surface and closed curved surface modeling operation or directly through thick curved surface modeling operation according to the nose pad curved surface supporting blade body template curved surface in S53;

s55: selecting or newly creating a geometric figure template of the nose pad anti-skid pattern from a characteristic structure database, scaling and adapting the geometric figure template, projecting the geometric figure template onto the curved surface of the adapting nose pad curved surface supporting blade template, and generating the curved surface supporting blade anti-skid pattern through grooving or rib modeling operation;

and/or selecting or newly creating a geometric figure template of the nose pad ventilation hole from the characteristic structure database, scaling and adapting the geometric figure template, projecting the geometric figure template onto the curved surface of the adapting nose pad curved surface support blade body template, and generating the curved surface support blade body ventilation hole through modeling operations of grooves, holes and hollows.

7. The method for designing and manufacturing ergonomic glasses according to claim 6, wherein in step S6, the step of integrating the integral frame model, the adaptive nose pad model and the pile head model to create an integrated body model by adopting a forward and reverse engineering hybrid modeling method comprises:

S61: in the joint base coordinate system, the head and face 3D model is positioned in a preset modeling pose, the integral mirror frame model is positioned to a corresponding pose according to three poses of glasses, and the pose attached to the nose of the head and face 3D model is kept unchanged by the adaptive nose support curved surface support leaf model;

s62: determining the style, type and modeling geometric parameters of an adaptive nose pad support structure according to the selection of a user and the style of glasses, wherein the type and style of the adaptive nose pad support structure comprise support flanks, support skirts, support sheets, support stems and a fusion type support structure;

s63: according to the determined style, type and modeling parameters of the nose pad supporting structure, firstly adopting operations of sweep, intersection, fillet, connection curve, segmentation, curved surface bridging and curved surface filling to establish a connection curve or a connection curved surface from a curved surface pad blade body to a mirror ring and/or a cross beam; then, generating a nose support structure model by adopting circular sweep or thick curved surface operation according to the generated connecting curve or connecting curved surface; finally, through the solid Boolean operation modeling operation of assembly or combined trimming, one end of the adaptive nose support structure body is fixedly connected with the curved surface support blade body in a fusion way, and the other end of the adaptive nose support structure body is fixedly connected with the mirror ring or/and the cross beam in a fusion way, and the joint part adopts a rounded smooth transition;

S64: selecting or newly creating a geometric figure template of a vent hole from a characteristic structure database, scaling and adapting the geometric figure template, projecting the geometric figure template on the side surface of the support flank and/or the support sheet, and generating a vent hole structure on the support flank and/or the support sheet through hole opening and groove modeling operation according to requirements;

s65: according to the positioning base points of the pile heads fixedly connected to the left and right mirror ring models and the assembly base points on the pile head models, keeping the integral mirror frame models motionless, and adjusting the positions of the left and right pile heads so that the assembly base points of the left and right pile heads are respectively overlapped with the positioning base points of the left and right mirror rings;

according to the three postures of the glasses and the coordinates of the characteristic points of the upper earroots in the combined base coordinate system of the integral glasses frame model, the postures of the left pile head and the right pile head are adjusted by taking the assembly base points of the left pile head and the right pile head as the reference, so that the simulated glasses leg in S44 reaches the matched external opening angle and the body leg angle, and at the moment, the tail parts of the simulated glasses leg are matched with the characteristic points of the upper earroots;

s66: according to the pile head model and the left and right mirror ring models, a pile head transition reinforcing sheet model is built through edge line extraction, sweep contour and sweep guide line establishment, explicit sweep, intersection, segmentation, connection, fillet, projection, joint, curved surface cutting and thick curved surface modeling operation, and the transition reinforcing sheet is attached to the outer side surface of the mirror ring and the outer side edge line to be generated;

The left pile head model and the right pile head model are fixedly connected and fused with the left mirror ring model and the right mirror ring model through joint trimming operation to form a whole, and the entity joint is smoothly transited and fused into a whole, so that the whole mirror frame model is respectively integrated with the adaptive nose support and the pile head to form the integrated mirror body model.

8. The method for designing and manufacturing ergonomic glasses according to claim 1, wherein in step S7, the step of building the adaptive temple model by using the hybrid modeling method of forward and reverse engineering further comprises:

s71: determining the style, manufacturing materials and pre-deformation of the glasses leg according to the style and the use scene of the glasses, and then determining the design geometric elements of the glasses leg according to the cantilever theory, wherein the design geometric elements comprise the cross-section size and the gradual change strategy of the glasses leg, the cross-section shape, the lofting coefficient and the flexible line shape of the spleen body section of the glasses leg;

s72: respectively establishing a first scanning ridge line and a second scanning ridge line of the spleen body part of the glasses leg according to the design geometric elements of the glasses leg and the distance between the upper earroot characteristic points and the positioning base surface of the pile head, wherein the first scanning ridge line is a straight line, and the second scanning ridge line is overlapped with corresponding deflection generation on the first scanning ridge line and is bent towards the buckling direction;

Dividing the first sweeping ridge line and the second sweeping ridge line by 8-15 equal parts, then establishing equally dividing point planes perpendicular to the first sweeping ridge line and the second sweeping ridge line at the equally dividing points, and drawing each sweeping section graph of the spleen body on each equally dividing point plane, wherein the size of each sweeping section graph gradually reduces from the head to the tail of the spleen;

s73: generating an adaptive mirror leg spleen segment model by adopting modeling operation of multi-section sweep, a closed curved surface or a multi-section entity according to the first sweep ridge line, the second sweep ridge line and the corresponding sweep section graph;

the spleen segment model generated based on the first sweep ridge line is a verification spleen model, is a simulation model of a real glasses leg after the spleen body is deformed, and can be used for suitability detection and virtual try-on links of the glasses leg; the spleen body section model generated based on the second sweep ridge line is a real spleen body model, has the same cross section shape but is superimposed with deflection pre-deformation, and is a model based on actual processing and preparation of the glasses leg;

s74: drawing a contour graph of the rear hinge lug at one end of the spleen body, which is close to the pile head, and directly generating the rear hinge lug on the spleen body model through thick curved surface operation; then, generating rear hinge holes on the rear hinge lugs at positions corresponding to the front hinge holes of the pile head through hole opening operation according to the structure and parameters of the front hinge on the pile head model in S44; in addition, the end face of the head of the spleen body is a plane, which is used as a limiting base surface of the glasses leg, and the rear hinge structure, the limiting base surface and the connected head of the spleen body are jointly called as the spleen head;

S75: according to the trend and the structure of the curved surface of the rear auricle part, a 3D spline is generated through spline operation fitting to serve as an axis of the spleen tail and sweep the ridge line, 6-12 equal divisions are carried out on the spline, then a plane perpendicular to the axis is established at each equal division point, and the shape of each sweep section of the spleen tail is drawn on each equal division plane;

s76: generating an envelope curve of the spleen tail through multi-section curve operation according to the sweep ridge line and each section shape of the spleen tail, generating a spleen tail model through closed curve operation, and finally, carrying out fairing treatment on the tail end of the spleen;

s77: cutting out the tail end part through a segmentation operation according to the real spleen body model of S73, cutting out the front end part through a segmentation operation according to the spleen tail model of S76 at the upper auricle position, finally, carrying out accurate matching on the position and the posture of the spleen body and the spleen tail after cutting, and fixedly connecting and fusing the spleen body and the spleen tail into a whole through assembly or entity Boolean operation to generate an actual mirror leg model for entity preparation;

according to the verification spleen body model in S73 and the spleen tail model in S76, the same steps are adopted, and through segmentation, matching of positions and postures and assembly or entity boolean operation, the verification spleen body model and the spleen tail model are fixedly connected and fused, and then the verification mirror leg model for adapting detection and virtual try-on is generated.

9. The ergonomic eyeglass design and production method of any one of claims 4-8, further comprising:

fitting the fitting temples to the integral frames to form an ergonomic eyeglass frame, and fitting the left and right lenses to left and right rims of the ergonomic eyeglass frame, respectively, to form an ergonomic eyeglass finished product.

10. An ergonomic eyeglass, characterized in that it is manufactured by the ergonomic eyeglass design and manufacturing method according to any one of claims 1 to 9.