Orthopedic insole preparation method

Abstract

The invention discloses a preparation method of orthopedic insoles and belongs to the field of orthopedic surgery. Comprising the following steps: collecting plantar contour information and plantar pressure information; preparing the large shape of the insole by using the sole contour information; plantar pressure is distributed and projected to the insole large shape; the insole is divided into different areas according to plantar pressure distribution; carrying out lattice treatment; carrying out smooth transition treatment on different areas; the insole large shape subjected to smooth transition treatment is converted into a file capable of being recognized by a 3D printer; the orthopedic insole with the softness and hardness in smooth transition among different areas is obtained through 3D printing. According to plantar pressure distribution, the insole is divided into different areas at will; the adjustment of different rigidities of partition positions can be conveniently realized; the soft and hard smooth transition effect between different areas is obtained; therefore, the purpose of carrying out smooth transition treatment on different areas is achieved, and the orthopedic insole which meets the customization requirement of a user, has different hardness at different positions, has smooth transition between different hardness and is comfortable to wear is manufactured.

Description

Technical Field

[0001] The invention belongs to the field of medical orthopedics, and in particular relates to a method for preparing an orthopedic insole. Background Art

[0002] Insoles are common daily aids. Daily wear can relieve foot pressure and prevent excessive friction between the soles of shoes and feet. They have functions such as foot care and prevention.

[0003] For patients with diabetic foot, flat feet, foot deformities, etc., special insoles can play a role in correction, fixation and rehabilitation, and have the functions of preventing, treating and alleviating foot diseases.

[0004] Many foot diseases (flat feet, diabetic foot, hallux valgus, etc.) can be treated / relieved by wearing orthotic insoles.

[0005] Orthotics are available for sale online or in stores.

[0006] These insoles have different material partitions at different positions. The purpose of this setting is to make the softness and hardness of different positions of an insole different.

[0007] The invention patent with the authorization announcement date of 2022.04.15 and the authorization announcement number of CN 112716103 B discloses a "porous variable stiffness diabetic foot decompression insole and its preparation method". The insole includes a main body, which is composed of a plurality of beams connected to each other to form a mesh porous structure, and the beams are hollow to form airways; different adjustment areas are set on the main body corresponding to different pressure areas on the sole of the foot, and the cross-sectional shapes of the airways in each adjustment area are the same or different, and the sizes of the cross-sectional shapes are the same or different; during the human gait cycle, the airway can be inflated or deflated by the inflation and deflation mechanism to dynamically adjust the stiffness and air permeability of each adjustment area. The insole using this technical solution has variable stiffness and air permeability, which is conducive to the rehabilitation of diabetic foot.

[0008] The plantar pressure distribution collected by the patient standing on the test platform is the basis for the design of the softness and hardness of the insole. Based on the different pressures at each position of the plantar, insoles of different hardness are designed.

[0009] The invention patent application with the publication date of October 26, 2021 and the publication number of CN 113547734 A discloses a "method for making a multi-structure 3D printed orthopedic insole", which includes the following steps: obtaining personal foot 3D data, establishing a foot 3D model and determining the 3D surface of the sole; determining the foot shape and dividing the sole into zones according to the obtained relevant data, and dividing the insole into the same number of production areas; determining the production materials, production structures and densities used in the corresponding production areas of the insole according to the pressure data and the foot shape; generating an insole structure model according to the foot 3D model and the 3D surface of the sole; importing the insole structure model into a 3D printer, and printing the insole in the order of each production area according to the insole structure model and the production materials, production structures and densities used in each production area of ​​the insole. This technical solution adjusts the local material properties of different areas of the insole according to each person's foot shape, foot shape of different pathologies and pressure distribution, so that the insole can be customized to suit various foot shapes.

[0010] From the perspective of product and research, the above solution and idea of ​​using different hardness for different positions of orthopedic insoles are correct.

[0011] However, the hardness and softness of different parts of the orthopedic insole vary according to the specific conditions of the soles of different people's feet. This is also one of the problems with non-customized insoles on the market.

[0012] Another question is, if Figure 1 , Figure 2 As shown in the figure, at the adjacent parts of different material partitions of an insole (or the junction, A, B, C and A′, B′, C′ in the figure represent different material partitions, and the junction of two material partitions is represented by a thick solid line in the figure), the hardness of the insole actually has a sudden change in hardness gradient; in other words, at the junction of two materials with different hardnesses, there is a phenomenon or part where the hardness of the insole suddenly changes; that is, the transition between the hardness of different materials is unnatural, which will cause physical discomfort when stepping between the two hardnesses.

[0013] At the same time, if Figure 2 As shown in , conventionally designed 3D printed insoles also have the same problem, that is, there is no smooth transition when printing different hardnesses; that is: the existing method of using 3D printing technology to print the same material with different hardnesses by setting and adjusting different "filling degrees" does not solve the problem of smooth transition between hardnesses of different materials in the design and preparation process. Summary of the invention

[0014] The technical problem to be solved by the present invention is to provide a method for preparing an orthopedic insole. The insole is divided into different regions with reference to the measured plantar pressure distribution map; the adjustment of different stiffness (hardness) of the partitioned positions can be easily realized through lattice processing; the effect of smooth transition of hardness between different regions is obtained by smoothing each fitting rod lattice and surface lattice in the insole, changing each rod diameter and the thickness of the surface sheet; it is helpful to manufacture an insole that meets the customized needs of users (different hardness at different positions) and is comfortable to wear (smooth transition between different hardness).

[0015] The technical solution of the present invention is to provide a method for preparing an orthopedic insole, which is characterized by comprising the following steps:

[0016] 1) Data collection:

[0017] 1.1) Collecting plantar contour information and plantar pressure information;

[0018] 2) Design:

[0019] 2.1) Prepare the insole shape using the plantar contour information;

[0020] 2.2) Project the sole pressure onto the insole;

[0021] 2.3) Divide the insole into different areas according to different plantar pressure distribution;

[0022] 2.4) Performing lattice processing;

[0023] 2.5) Provide smooth transition between different areas;

[0024] 3) Manufacturing:

[0025] 3.1) 3D printing machine selection;

[0026] 3.2) Convert the insole after gentle transition processing into a file recognizable by a 3D printer;

[0027] 3.2) Use 3D printing to obtain orthopedic insoles with a smooth transition of softness and hardness between different areas.

[0028] Specifically, in the step 1) of data collection, the plantar pressure data is obtained by measuring the thrust required to lift the patient's foot when the arch of the patient's foot needs to be corrected.

[0029] Furthermore, the plantar pressure is measured by measuring the pressure of the patient's foot on the orthopedic insole when the patient's foot reaches the required normal arch or the height required for the treatment of the arch.

[0030] Furthermore, the height required to be raised is detected by a displacement sensor; and the pressure of the foot on the orthotic insole is detected by a force sensor.

[0031] Specifically, in the step 2.1), the insole shape refers to generating an adaptive insole model using digital modeling software.

[0032] Specifically, in the step 2.4), the plantar pressure is divided into different areas of the insole, and different partitions are generated and crystallized.

[0033] Furthermore, the lattice includes rod lattice and face lattice.

[0034] Specifically, in the step 2.5), in the digital modeling software, the fitted rod lattice and the face lattice are smoothed by a sphere, and the rod diameter or the face sheet thickness is changed, thereby achieving the purpose of smooth transition of pressure values ​​between different regions.

[0035] Specifically, the method for preparing the orthopedic insole uses the measured plantar pressure distribution map as a reference, and divides the insole into different areas according to the plantar pressure distribution, thereby realizing arbitrary partitioning of different pressure ranges; and by crystallizing the insole, the adjustment of different stiffnesses at the partition positions can be realized.

[0036] Furthermore, the method for preparing orthopedic insoles smoothes the fitting rod lattices and the surface lattices, changes the rod diameter and the surface thickness, and thereby achieves the purpose of smooth transition between different areas, which helps to manufacture orthopedic insoles that meet user customization needs, have different hardnesses in different positions, and have smooth transitions between different hardnesses, and are comfortable to wear.

[0037] Compared with the prior art, the advantages of the present invention are:

[0038] 1. The technical solution of the present invention uses the measured plantar pressure distribution map as a reference, and according to the plantar pressure distribution, the insole is roughly divided into different areas, and any partitions with different pressure ranges can be realized;

[0039] 2. The technical solution of the present invention can conveniently realize the adjustment of different stiffness (softness and hardness) of the partition position through lattice processing;

[0040] 3. The technical solution of the present invention achieves a smooth transition effect of softness and hardness between different areas by changing the diameter of each rod and the thickness of the surface sheet in the insole;

[0041] 4. The technical solution of the present invention achieves the purpose of smooth transition between different regions by smoothing the fitted rod lattice and the face lattice in the modeling software, changing the rod diameter and the face sheet thickness, and the implementation cost is low;

[0042] 5. The technical solution of the present invention is helpful to manufacture insoles that meet the customized needs of users (different hardness at different positions) and are comfortable to wear (smooth transition between different hardnesses). BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a structural schematic diagram of an existing patch-type insole;

[0044] Figure 2 This is a schematic diagram of the structure of the existing conventionally designed 3D printed insole;

[0045] Figure 3 It is a schematic diagram of a block diagram of a method for preparing an orthopedic insole of the present invention;

[0046] Figure 4 is a schematic diagram of unilateral plantar pressure distribution in the present invention;

[0047] Figure 5 It is a schematic diagram of the structure of the insole of the present invention;

[0048] Figure 6 are schematic diagrams of structures of different rod lattice structure examples;

[0049] Figure 7 It is a schematic diagram of the structure of different face lattice examples;

[0050] Figure 8 It is a schematic diagram of the structure of the rod lattice insole;

[0051] Fig. 9 It is a schematic diagram of the structure of the surface lattice insole;

[0052] Fig.10 It is a schematic diagram of the microscopic sphere fitting structure of the present invention;

[0053] Fig.11 It is a schematic diagram of the structure of insoles with different softness and hardness obtained by mapping different surface thicknesses by images in the present invention. DETAILED DESCRIPTION

[0054] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0055] Figure 3 The technical solution of the present invention provides a method for preparing an orthopedic insole, comprising:

[0056] 1) Data collection:

[0057] 1.1) Collecting plantar contour information and plantar pressure information;

[0058] 2) Design:

[0059] 2.1) Prepare the insole shape using the plantar contour information;

[0060] 2.2) Project the sole pressure onto the insole;

[0061] 2.3) Divide the insole into different areas according to different plantar pressure distribution;

[0062] 2.4) Performing lattice processing;

[0063] 2.5) Provide smooth transition between different areas;

[0064] 3) Manufacturing:

[0065] 3.1) 3D printing machine selection;

[0066] 3.2) Convert the insole after gentle transition processing into a file recognizable by a 3D printer;

[0067] 3.2) Use 3D printing to obtain orthopedic insoles with a smooth transition of softness and hardness between different areas.

[0068] Specifically, in step 1) data collection, at least the plantar pressure data is required for the subsequent steps; the obtained plantar pressure distribution, such as Figure 4 as shown in .

[0069] In step 2.1), the insole model refers to the use of digital modeling software to generate a suitable insole model (see Figure 5 ).

[0070] In step 2.4), the plantar pressure is divided into different areas of the insole, and different partitions are generated and crystallized.

[0071] Lattice formation is essentially the repetition of the same morphological features, and a single lattice is similar to a Lego block.

[0072] Among them, lattice can be divided into two types: rod lattice and surface lattice. Figure 6 , Figure 7 Examples of different rod lattices and face lattices are given in .

[0073] In step 2.4), a re-lattice operation is performed, and a lattice insole is generated after distortion and deformation based on the insole's general shape, such as Figure 8 , Fig. 9 as shown in .

[0074] Figure 8 , Fig. 9 They are schematic diagrams of the structures of the rod lattice insole and the surface lattice insole respectively.

[0075] In step 2.5), if Fig.10As shown in , the technical solution uses spheres to smooth the fitted rod lattices and face lattices at the microscopic level, changes the rod diameter and face sheet thickness, and thereby achieves the purpose of smooth transition between different regions.

[0076] In general, the technical solution of the present invention, after having the ability of smooth transition, uses an image (which can be a measured plantar pressure distribution map or other) as a reference to change the diameter of each rod and the thickness of the surface sheet in the insole, and uses 3D printing to obtain an orthopedic insole with a smooth transition of softness and hardness between different areas.

[0077] In the above processes and steps, since lattice formation, rod lattice, face lattice, recrystallization operations, as well as smoothing, changing rod diameter, face thickness and other operations are all specific concepts and operation steps in digital modeling software (for example, finite element analysis software: ABAQUS, ANSYS or MSC, etc.), their specific implementation methods and detailed operation steps will not be described here.

[0078] Example:

[0079] A patient with diabetic foot needs orthotics, using the following steps:

[0080] The first step is to scan the sole contour to create the general shape of the insole;

[0081] The second step is to collect the plantar pressure of both feet;

[0082] The third step is to input the plantar pressure distribution value and the obtained general shape of the insole into the design software to generate an insole model with different lattice rod diameters at different positions;

[0083] The fourth step is to submit the insole model to the 3D printer slicing software for slicing and printing.

[0084] The technical solution of the present invention can realize the following functions according to the needs of personalized customization:

[0085] 1. Realize arbitrary partitioning of insoles with different pressure ranges;

[0086] 2. Ability to adjust different stiffness (softness) of different partition positions;

[0087] 3. A smooth transition between softness and hardness is achieved in different stiffness zones;

[0088] 4. Partitioning and stiffness adjustment can be performed directly according to the image, which is convenient and easy to implement.

[0089] The invention can be widely used in the design and preparation fields of orthopedic insoles.

Claims

1. A method for preparing an orthopedic insole, characterized in that The following steps are involved: 1) Data collection: 1.1) Collecting plantar contour information and plantar pressure information; 2) Design: 2.1) Prepare the insole shape using the plantar contour information; 2.2) Project the sole pressure onto the insole; 2.3) Divide the insole into different areas according to different plantar pressure distribution; 2.4) Performing lattice processing; 2.5) Provide smooth transition between different areas; 3) Manufacturing: 3.1) 3D printing machine selection; 3.2) Convert the insole after gentle transition processing into a file recognizable by a 3D printer; 3.2) Use 3D printing to obtain orthopedic insoles with a smooth transition of softness and hardness between different areas.

2. The method for preparing an orthopedic insole according to claim 1, characterized in that In the data collection of step 1), the plantar pressure data is obtained by measuring the thrust required to lift the patient's foot when the arch of the patient's foot needs to be corrected.

3. The method for preparing an orthopedic insole according to claim 1, characterized in that The plantar pressure is measured by measuring the pressure of the patient's foot on the orthopedic insole when the patient's foot reaches the required normal arch or the height required for the treatment of the arch.

4. The method for preparing an orthopedic insole according to claim 3, characterized in that The height required to be raised is detected by a displacement sensor; the pressure of the foot on the orthotic insole is detected by a force sensor.

5. The method for preparing an orthopedic insole according to claim 1, characterized in that In the step 2.1), the insole shape refers to the use of digital modeling software to generate an adaptive insole model.

6. The method for preparing an orthopedic insole according to claim 1, characterized in that In the step 2.4), the plantar pressure is divided into different areas of the insole to generate different partitions and crystallize them.

7. The method for preparing an orthopedic insole according to claim 6, characterized in that The crystallization includes rod lattice and surface lattice.

8. The method for preparing an orthopedic insole according to claim 1, characterized in that In the step 2.5), in the digital modeling software, the fitted rod lattice and the surface lattice are smoothed by a sphere, and the rod diameter or the surface thickness is changed, thereby achieving the purpose of smooth transition of pressure values ​​between different regions.

9. The method for preparing an orthopedic insole according to claim 1, characterized in that The orthopedic insole preparation method uses the measured plantar pressure distribution map as a reference, divides the insole into different areas according to the plantar pressure distribution, and can realize arbitrary partitioning of different pressure ranges; by crystallizing the insole, the adjustment of different stiffness of the partition position can be realized.

10. The method for preparing an orthopedic insole according to claim 1, characterized in that The method for preparing an orthopedic insole smoothes the fitting rod lattice and the surface lattice, changes the rod diameter and the surface sheet thickness, and thereby achieves the purpose of smooth transition between different areas, which helps to manufacture an orthopedic insole that meets the customized needs of users, has different hardnesses at different positions, has a smooth transition between different hardnesses, and is comfortable to wear.

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