A DIY insole manufacturing method and system for improving the biomechanical alignment

Abstract

The present invention provides a DIY insole manufacturing method and system for improving the bio-mechanical line. The method includes: obtaining the body information of the measured person, where the body information includes the BMI index, foot pressure distribution, and footprint map; obtaining the arch information of the measured person according to the footprint map; comprehensively obtaining a pre-shaped insole with a recommended hardness based on the BMI index and the foot pressure distribution; heating and softening the pre-shaped insole, and combining it with an arch mold corresponding to the arch information of the measured person to form a customized insole. The present invention can customize an insole that conforms to the human biomechanical characteristics according to an individual's BMI, foot pressure distribution, and arch information, so as to perfectly fit the foot, and can disperse the plantar pressure, adjust the gait, relieve fatigue, and increase the comfort of the foot.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of insoles, and particularly relates to a DIY insole manufacturing method and system for improving the biomechanical alignment. Background Art

[0002] Insoles commonly used by people have different functions according to their functions. The functions of conventional insoles are only to absorb sweat and keep warm, while for health-care insoles, which are beneficial to people's health, antibacterial insoles, deodorant insoles, traditional Chinese medicine insoles, etc. have been further developed. There is also a kind of insole called a functional insole, which is an insole with special functions, such as: antistatic insoles, height-increasing insoles, waterproof insoles, air circulation insoles, etc.

[0003] In the improved design of insoles, the balance between shock absorption and support has been increasingly emphasized. Shock absorption refers to the use of shock-absorbing technology at the bottom of the insole to absorb part of the reaction force from the ground, thereby reducing the pressure exerted by the ground on the knees and ankles. This function is most valued by general runners, especially those with a larger body mass, because running itself is prone to knee injuries, and insoles with good shock-absorbing performance can help reduce such injuries. Support is to use special materials at the heel part of the insole, which can prevent foot injuries caused by movement deformation during running (for example, when there is a sudden protrusion on the ground, it is easy to cause sprains).

[0004] Due to the lack of understanding and protection awareness of the feet, as well as the influence of economic conditions and other aspects, functional customized insoles are mostly used for physical therapy, mainly for patients with foot diseases or those with difficulty walking such as cerebral palsy, and the price is expensive.

[0005] In life, some people need customized insoles to achieve the purposes of correcting sports postures, improving sports performance, treating diseases, and increasing comfort. With the progress of the medical cause, the development of competitive sports, and the improvement of people's requirements for the comfort of wearing shoes, the number of customized insoles has increased rapidly, and people's demand for and dependence on customized insoles have also increased day by day. However, the existing insole customization technology has the disadvantages of complex processes, long processing cycles, low precision of insoles, and easy deviation of fit.

[0006] There has emerged a solution for existing customized insoles to establish a three-dimensional model file using a three-dimensional scanner and then process the insoles. With the application of the three-dimensional scanner, the cooperation of professional personnel is required, increasing the cost. Moreover, although this customization method is much faster than the traditional manual customization method, its customization time is still more than several hours. In addition, the insole manufacturing method using 3D printing technology has certain limitations in material selection because most shoe materials cannot be 3D printed, especially lightweight shock-absorbing foam materials. Therefore, the performance of insoles obtained by 3D printing will be limited.

[0007] The Body Mass Index (BMI) is a globally recognized method for classifying obesity levels and has received increasing attention in society. Currently, the World Health Organization uses the BMI to define obesity or overweight. The calculation method of the BMI is to divide the weight in kilograms by the square of the height in meters. Since the BMI is closely related to the total body fat, it is more accurate than simply relying on the weight indicator. The China Office of the International Life Sciences Institute analyzed and summarized the data of a ten-year sampling survey of the population and formulated the weight index classification standards for Chinese ordinary adults as follows: normal, BMI ≤ 24.0; overweight, 24.0 < BMI < 28.0; obese, BMI ≥ 28.0.

[0008] For overweight and obese people, the foot load-bearing is greater than that of people with normal weight, resulting in problems with the biomechanical line. Whether the lower limb biomechanical line is normal directly affects people's standing and walking. The foot is the fulcrum of the human body. When people stand, walk, and perform related actions, it is the key to maintaining body balance, control, and coordination ability, and also the key to maintaining the normal biomechanical line.

[0009] The load-bearing behavior of the foot (including standing, walking, or running, etc.) involves the joint cooperation of three independent systems: bones, muscles, and the central nervous system. Any change in the "foundation" will cause problems with the mechanical structure, leading to various compensatory problems, resulting in functional deficiencies and affecting the ability to stand, walk, or run.

[0010] When the foot morphology changes (such as flat feet, calcaneal spurs, valgus heel, hallux valgus, etc.), it will induce a series of pains, such as plantar fasciitis, heel pain, Achilles tendinitis, bursitis of the big toe, etc.

[0011] An abnormal lower limb biomechanical line will also affect the change of the human "skeleton", causing injuries to other joints in the lower limbs, such as traumatic arthritis or degeneration in the ankle joint, knee joint, hip joint, etc., and even functional leg length inequality.

[0012] According to a survey by the domestic health organization, 82% of people suffer from foot diseases to varying degrees, and most of the foot diseases are caused by improper shoe wearing. Ill-fitting shoes keep the foot muscles in an abnormal state of tension for a long time, causing ligament relaxation or atrophy of the arch muscles, resulting in foot diseases such as flat feet and hallux valgus.

[0013] The Chinese Patent Application Publication No.: CN105216354A provides a customizable insole and its manufacturing method. During the process of making a foot mold, plasticine is required, which is complex in operation and poor in shaping property, and prone to errors during the subsequent insole manufacturing process. At the same time, the single heat-deformable material used does not select materials with different properties for each part or area based on the differences in human biomechanics, and cannot meet the needs of people with different foot diseases, so it has certain limitations.

[0014] The Chinese Patent Application Publication No.: CN102862308A also provides a manufacturing method for customized insoles. During the manufacturing process, a lower mold needs to be customized in advance, and an upper mold needs to be made according to the customer's foot shape. The whole process is cumbersome and complex, not suitable for rapid customization, and the insole cannot achieve local functionalization. Summary of the Invention

[0015] The technical problem to be solved by the present invention is to provide a DIY insole manufacturing method and its system for improving the biomechanical line by comprehensively considering the BMI index related to obesity, the type of foot arch, and the foot pressure distribution, so as to correct the biomechanical defects with personalized fitting, thereby helping users ensure and timely relieve potential and related musculoskeletal problems.

[0016] To solve the above technical problems, the present invention provides a DIY insole manufacturing method for improving the biomechanical line, characterized in that the method includes:

[0017] Step 1, obtaining the body information of the measured person, where the body information includes the BMI index, foot pressure distribution, and footprint diagram;

[0018] Step 2, obtaining the foot arch information of the measured person according to the footprint diagram;

[0019] Step 3, obtaining a pre-shaped insole with a recommended hardness by comprehensively considering the BMI index and the foot pressure distribution;

[0020] Step 4, heating and softening the pre-shaped insole, and combining it with a foot arch mold corresponding to the foot arch information of the measured person to form a customized insole.

[0021] Preferably, the present invention further provides a DIY insole manufacturing method for improving the biomechanical line, characterized in that the foot arch mold is obtained according to the footprint diagram and satisfies:

[0022] Obtain the position coordinates of the first point (A), the second point (A'), and the third point (B) in the footprint diagram, where the first point (A) and the second point (A') are points tangent to the inner forefoot and the heel respectively on a straight line, the fourth point (O) is the midpoint of the line connecting the first point (A) and the second point (A'), and the third point (B) is the intersection point of the extension line of the first point (A) towards the highest point (d) of the arch of the foot and the perpendicular line of the fourth point (O);

[0023] The arch mold of the subject satisfies the equation:

[0024]

[0025] where b and a satisfy:

[0026]

[0027] where A' is the length between the first point (A) and the fourth point (O), and B' is the length between the third point (B) and the fourth point (O).

[0028] Preferably, the present invention further provides a DIY insole manufacturing method for improving the biomechanical alignment, characterized in that the arch mold includes several molds of flat arch, normal arch, and high arch respectively corresponding to different foot size ranges.

[0029] Preferably, the present invention further provides a DIY insole manufacturing method for improving the biomechanical alignment, characterized in that the step three further includes:

[0030] (1) When the BMI index is less than 24 and the foot pressure is in the front, select the forefoot material with a Shore hardness index of 50 - 59 and the heel material with a Shore hardness index of 60 - 75;

[0031] (2) When the BMI index is less than 24 and the foot pressure is in the middle, select the forefoot and heel materials with a Shore hardness index of 60 - 75;

[0032] (3) When the BMI index is less than 24 and the foot pressure is in the back, select the forefoot material with a Shore hardness index of 60 - 75 and the heel material with a Shore hardness index of 50 - 59;

[0033] (4) When the BMI index is between 24 - 28 and the foot pressure is in the front, select the forefoot material with a Shore hardness index of 40 - 49 and the heel material with a Shore hardness index of 50 - 59;

[0034] (5) When the BMI index is between 24 - 28 and the foot pressure is in the middle, select the forefoot and heel materials with a Shore hardness index of 50 - 59;

[0035] (6) When the BMI index is between 24 and 28 and the foot pressure is at the back, select forefoot materials with a Shore hardness index of 50 - 59 and rear - foot materials with a Shore hardness index of 40 - 49;

[0036] (7) When the BMI index is greater than 28 and the foot pressure is at the front, select forefoot materials with a Shore hardness index of 25 - 39 and rear - foot materials with a Shore hardness index of 40 - 49;

[0037] (8) When the BMI index is greater than 28 and the foot pressure is in the middle, select fore - and - rear - foot materials with a Shore hardness index of 40 - 49;

[0038] (9) When the BMI index is greater than 28 and the foot pressure is at the back, select forefoot materials with a Shore hardness index of 40 - 49 and rear - foot materials with a Shore hardness index of 25 - 39.

[0039] Preferably, the present invention further provides a DIY insole manufacturing method for improving the biomechanical alignment, characterized in that the step four further includes:

[0040] Step four - one: The feet of the measured person step into and fit with the vacuum - forming unit;

[0041] Step four - two: Evacuate the vacuum - forming unit to fix the shape of the foot mold;

[0042] Step four - three: Place the pre - shaped insole softened by heating into the foot mold of the vacuum - forming unit;

[0043] Step four - four: The measured person steps into and stands on the pre - shaped insole again, and place the arch mold between the recommended insoles;

[0044] Step four - five: As the pre - shaped insole cools and hardens at room temperature, the customized insole is formed.

[0045] The present invention also provides a DIY insole manufacturing system for improving the biomechanical alignment, characterized by including:

[0046] A pressure - detection unit for detecting and obtaining the physical information of the measured person, where the physical information includes weight, foot - pressure distribution, and footprint map;

[0047] A touch - screen unit for inputting physical information including height parameters;

[0048] A main - control unit for calculating and providing a pre - shaped insole with a recommended hardness according to the foot - pressure distribution, footprint map, and the weight and height parameters;

[0049] An insole - forming unit for collecting the footprints of the measured person and performing pressing and forming on the pre - shaped insole in combination with the arch mold corresponding to the arch information of the measured person.

[0050] Preferably, the present invention further provides a DIY insole manufacturing system for improving the biomechanical alignment, characterized in that the system further includes:

[0051] An arch mold, disposed between the arches of the two feet of the subject when stepping into the mold using the insole forming unit, and the arch mold satisfies:

[0052] Obtain the position coordinates of the first point (A), the second point (A'), and the third point (B) in the footprint diagram, where the first point (A) and the second point (A') are points tangent to the inner forefoot and the heel respectively on a straight line, the fourth point (O) is the midpoint of the line connecting the first point (A) and the second point (A'), and the third point (B) is the intersection point of the extension line of the first point (A) to the highest point (d) of the arch and the perpendicular line of the fourth point (O);

[0053] The arch mold of the subject satisfies the equation:

[0054]

[0055] where b and a satisfy:

[0056]

[0057] where A' is the length between the first point (A) and the fourth point (O), and B' is the length between the third point (B) and the fourth point (O).

[0058] Preferably, the present invention further provides a DIY insole manufacturing system for improving the biomechanical alignment, characterized in that the arch mold includes several types of molds for flat arches, normal arches, and high arches corresponding to different foot size ranges respectively.

[0059] Preferably, the present invention further provides a DIY insole manufacturing system for improving the biomechanical alignment, characterized in that the main control unit obtains the BMI index according to the height and weight, and makes the following selections based on the index and the plantar pressure distribution:

[0060] (1) When the BMI index is less than 24 and the foot pressure is in the front, select the forefoot material with a Shore hardness index of 50 - 59 and the rearfoot material with a Shore hardness index of 60 - 75;

[0061] (2) When the BMI index is less than 24 and the foot pressure is in the middle, select the front and rear foot materials with a Shore hardness index of 60 - 75;

[0062] (3) When the BMI index is less than 24 and the foot pressure is in the rear, select the forefoot material with a Shore hardness index of 60 - 75 and the rearfoot material with a Shore hardness index of 50 - 59;

[0063] (4) When the BMI index is between 24 and 28 and the foot pressure is in the front, select the forefoot material with a Shore hardness index of 40 - 49 and the rearfoot material with a Shore hardness index of 50 - 59;

[0064] (5) When the BMI index is between 24 and 28 and the foot pressure is in the middle, select the front and rear foot materials with a Shore hardness index of 50 - 59;

[0065] (6) When the BMI index is between 24 and 28 and the foot pressure is in the rear, select the forefoot material with a Shore hardness index of 50 - 59 and the rearfoot material with a Shore hardness index of 40 - 49;

[0066] (7) When the BMI index is greater than 28 and the foot pressure is in the front, select the forefoot material with a Shore hardness index of 25 - 39 and the rearfoot material with a Shore hardness index of 40 - 49;

[0067] (8) When the BMI index is greater than 28 and the foot pressure is in the middle, select the front and rear foot materials with a Shore hardness index of 40 - 49;

[0068] (9) When the BMI index is greater than 28 and the foot pressure is in the rear, select the forefoot material with a Shore hardness index of 40 - 49 and the rearfoot material with a Shore hardness index of 25 - 39.

[0069] Preferably, the present invention further provides a DIY insole manufacturing system for improving the biomechanical alignment, characterized in that the system further includes:

[0070] An insole heating unit for heating and softening the pre-shaped insole before shaping.

[0071] Preferably, the present invention further provides a DIY insole manufacturing system for improving the biomechanical alignment, characterized in that the insole shaping unit further includes:

[0072] An air extraction control unit and a vacuum forming unit, the air extraction unit includes an air pump for evacuating the inside of the vacuum forming unit, and then fitting the pre-shaped insole to the vacuum forming unit for shaping.

[0073] Preferably, the present invention further provides a DIY insole manufacturing system for improving the biomechanical alignment, characterized in that the pressure detection unit includes a foot pressure plate.

[0074] Compared with the prior art, the present invention has the following advantages:

[0075] The insoles of the present invention can be professionally customized according to the individual's plantar conditions. The customized insoles conform to the human biomechanical characteristics, can be personalized according to the individual's plantar pressure conditions and foot disease conditions, thus perfectly fitting the feet, and can disperse the plantar pressure, adjust the gait, relieve fatigue and increase the comfort of the feet.

[0076] Using the technical solution of the present invention, the customized insole has a short production cycle, can be customized on-site, and the whole process takes no more than dozens of minutes. The insole has high dimensional accuracy of the shape and completely fits the shape of the sole. The whole customization process is dust-free and environmentally friendly.

[0077] The rapid prototyping equipment for customizing the insole of the present invention has a compact structure, is light in weight and easy to move. The preparation method of the custom insole using this equipment is simple, feasible and efficient. It can be applied to shopping malls, specialty stores and various sports venues. Moreover, the process of collecting the sole shape can enhance the user experience and increase the user's interest in the custom insole; the rapid custom molding can improve the work efficiency of the merchant, expand the sales volume of related products and increase the output value. Brief Description of the Drawings

[0078] The accompanying drawings are provided to further understand the present application. They are incorporated and constitute a part of the present application. The drawings show embodiments of the present application and, together with this specification, serve to explain the principles of the present invention. In the drawings:

[0079] Figure 1 is a schematic diagram of the composition of a DIY insole manufacturing system for improving the biomechanical alignment of the present invention;

[0080] Figure 2 is a schematic diagram of obtaining the arch type according to the foot shape diagram of the measured person;

[0081] Figure 3(1) shows a schematic diagram of the measured person standing with both feet together;

[0082] In Figure 3(2), the innermost ellipse abstracted from Figure 3(1) is a schematic diagram of the arch mold;

[0083] Figure 4(1) and 4(2) respectively show schematic diagrams of the decomposition and combination of the insole adopted by the present invention.

[0084] Reference Signs

[0085] 10 - Main control unit

[0086] 11 - Pressure detection unit

[0087] 12 - Touch screen unit

[0088] 13 - Insole selection unit

[0089] 14 - Arch mold unit

[0090] 15 - Insole molding unit

[0091] 151 - Air extraction control unit

[0092] 152 - Vacuum molding unit

[0093] 16 - Insole heating unit

[0094] 4 - Insole

[0095] 40 - Insole body

[0096] 401 - Rear sole

[0097] 402 - Front sole

[0098] 41 - Lining

[0099] 42 - Polymer thermoplastic plate Detailed implementation manners

[0100] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some examples or embodiments of the present application. For those of ordinary skill in the art, without creative efforts, the present application can also be applied to other similar scenarios based on these drawings. Unless it is obvious from the language context or otherwise stated, the same reference numerals in the figures represent the same structure or operation.

[0101] As shown in the present application and the claims, unless the context clearly indicates an exceptional situation, words such as "a", "an", "one", and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0102] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for the sake of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0103] In the description of the present application, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description. Without contrary explanation, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0104] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "above-mentioned", etc. may be used herein to describe the spatial positional relationship of one device or feature shown in the figures with respect to other devices or features. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "beneath" the other devices or structures. Thus, the exemplary term "above" can include both orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations of the spatial relative descriptions used herein will be made.

[0105] In addition, it should be noted that the use of terms such as "first", "second", etc. to limit components is only for the convenience of differentiating the corresponding components. Without additional statement, the above terms have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present application. In addition, although the terms used in the present application are selected from well-known and commonly used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant according to his or her judgment, and their detailed meanings are described in the relevant parts of the description herein. In addition, it is required to understand the present application not only through the actual terms used, but also through the meaning implied by each term.

[0106] Flowcharts are used in the present application to illustrate the operations performed by the system according to the embodiments of the present application. It should be understood that the operations before or below do not necessarily have to be executed precisely in sequence. On the contrary, various steps can be executed in reverse order or simultaneously. At the same time, or other operations can be added to these processes, or one or several steps of operations can be removed from these processes.

[0107] Please refer to Figure 1 which shows a DIY insole manufacturing system for improving the biological force line of the present invention.

[0108] The system includes a pressure detection unit 11, a touch screen unit 12, an insole selection unit 13, an arch mold unit 14, an insole forming unit 15, an insole heating unit 16, and a main control unit 10.

[0109] Among them, the insole forming unit 15 includes an air extraction control unit 151 and a vacuum forming unit 152.

[0110] When using this system, the person to be measured first stands barefoot on the detection area of the pressure detection unit 11.

[0111] Then, data such as height is input through the prompt of the touch screen unit 12.

[0112] The pressure detection unit 11 obtains the foot pressure distribution and footprint of the person to be measured. The pressure detection unit 11 is usually composed of a foot pressing plate or a similar pressure sensor to collect foot information, including data such as foot shape, foot pressure distribution, and body weight (W).

[0113] After obtaining the above information, the main control unit 10 of this system performs background calculation and judgment, and provides recommended pre-shaped insoles and recommended arch molds for the person to be measured from several kinds of insoles through the touch screen unit 12.

[0114] After the person to be measured selects the recommended pre-shaped insole from the insole selection unit 13, it is first placed in the insole heating unit 16 for heating and softening, and then the final DIY production is realized through the insole forming unit 15. The specific steps are as follows:

[0115] The insole forming unit 15 includes two parts, an air extraction control unit 151 and a vacuum forming unit 152.

[0116] The person to be measured first steps barefoot into the area of the vacuum forming unit 152. After vacuum extraction, the footprint shape of the person to be measured is initially obtained. Then, the heated pre-shaped insole is placed into the footprint shape of the vacuum forming unit, and the recommended arch mold is selected from the arch mold unit 14 according to the prompt of the touch screen unit 12. The person to be measured stands on the heated and softened pre-shaped insole again, and the arch mold is attached between the two standing feet. While the insole cools, forming is achieved, and the finally formed insole completely fits the curved surface of the sole.

[0117] Preferably, during the forming process, the insoles are placed in the formed foot shape according to the left and right feet. A person stands on the insoles, and at the same time, several actions such as squatting, lifting the front sole, and placing the center of gravity on the rear heel are used to simulate the center of gravity landing during the process of human walking and standing, so that the insoles change shape again according to the center of gravity, achieving the effect of matching the individual foot shape.

[0118] Since the recommended customized insoles selected for the tested person comprehensively consider the plantar pressure condition and the BMI index, the biomechanical line of the user is greatly improved.

[0119] In the above DIY process, the recommended customized insoles obtained by the tested person are based on the following factors:

[0120] First, the BMI parameter.

[0121] The main control unit 10 in the background obtains the BMI index according to the weight and height parameters of the tested person:

[0122] BMI = W / T 2

[0123] The main control unit 10 makes a judgment according to the BMI index:

[0124] BMI ≤ 24, normal

[0125] 24 < BMI < 28, overweight

[0126] BMI ≥ 28, obese

[0127] Second, the arch type.

[0128] Understanding the arch type of the tested person aims to select an arch mold, and there are specifically two methods:

[0129] (1) Select an arch mold close to the arch type and foot length of the tested person:

[0130] A preferred embodiment of the present invention is to use the Footprint Angle (FA for short) and the Chippaux Smirak Index (CSI for short) to determine the arch type, specifically as follows:

[0131] The pressure detection unit 11 obtains Figure 2 the foot shape diagram of the tested person as shown, and obtains arch information with reference to the following steps:

[0132] Step 1, draw a straight line A - A' on the Figure 2 footprint diagram, and this straight line is tangent to the inner forefoot and the heel at points A and A' respectively;

[0133] Step 2, find the highest point d of the arch, and draw a straight line A - d from point A to the highest point d of the arch;

[0134] Step 3, the footprint angle FA (α) is formed between the two straight lines A - A' and A - d. According to the value of the footprint angle FA, it is used to evaluate the arch type, corresponding to:

[0135] Footprint angle Arch type 0°-34.9° Flat foot (low arch) 35°-44.9° Normal arch >44.9° High arch

[0136] Table 1

[0137] After determining three different arch types, three arch molds are provided for different ranges of foot length sizes. For example:

[0138] Three arch molds for flat feet, normal feet, and high arches corresponding to foot lengths of 32 - 36 yards

[0139] Three arch molds for flat feet, normal feet, and high arches corresponding to foot lengths of 37 - 46 yards

[0140] ……

[0141] The above method of recommending arch molds is relatively simple. The arch mold unit 14 provides the corresponding molds above, and the main control unit 10 recommends the closest one according to the arch type evaluated by the foot size of the person being measured.

[0142] In addition, other simple methods of judging arch types based on footprint diagrams can also be adopted.

[0143] (2) Obtaining the arch mold according to the footprint diagram of the person being measured

[0144] Please refer to Figure 3(1), which shows the schematic of the person being measured standing with both feet together;

[0145] Figure 3(2) shows the shape abstracted from the scene of standing with both feet together, where the innermost ellipse is the arch mold.

[0146] Similar to the above Figure 2 In Figure 3, A and A' are the points tangent to the inner front sole and the heel respectively on a straight line, O is the midpoint of the line segment A - A', and B is the intersection point of the extension line of A to the highest point d of the arch and the perpendicular line of O;

[0147] The arch mold is elliptical and satisfies the following equation:

[0148]

[0149] Among them, the relationship between a, b and A, B in the footprint diagram is as follows:

[0150] A = ka

[0151] B = kb (2)

[0152] According to Figure 2 The coordinates of A and B obtained, the equation of the straight line A, B is:

[0153]

[0154] After simplification, we get:

[0155]

[0156] Since the inner ellipse is tangent to AB at point M, substituting formula (4) gives:

[0157]

[0158] After simplification, we get:

[0159]

[0160] According to the tangency relationship:

[0161]

[0162] Therefore, a and b satisfy:

[0163]

[0164] Therefore, by using this method, the relevant parameters of the elliptical arch mold can be obtained according to the measured footprint map of the measured person, and a personalized and accurate arch mold can be obtained through 3D printing.

[0165] For the arch molds formed by the above two methods, the selected height is usually 3 - 4 cm.

[0166] Third, foot pressure distribution information.

[0167] This pressure distribution involves three types: pressure in the front, pressure in the middle, and pressure in the back. In the solution of the present invention, this information can be obtained through the pressure detection unit 11.

[0168] Combining the three situations of the BMI index and the pressure distribution information, Table 2 is formed as follows.

[0169]

[0170] Table 2

[0171] In Table 3 below, the hardness grading indications of various materials including EVA, plastic, PU, foamed rubber, etc. are given: among them, the hardness unit is: Shore hardness

[0172]

[0173] Table 3

[0174] Combining the foot information of the measured person obtained from the above Tables 1 - 3, Table 4 gives the corresponding relationship for insole selection:

[0175]

[0176] Table 4

[0177] Specifically explained as:

[0178] (1) If the BMI index is less than 24 and the foot pressure is in the front, choose a forefoot material with a Shore hardness index of 50-59 and a rear foot material with a Shore hardness index of 60-75;

[0179] (2) If the BMI index is less than 24 and the foot pressure is medium, choose forefoot and heel materials with a Shore hardness index of 60-75;

[0180] (3) If the BMI index is less than 24 and the foot pressure is at the rear, choose a forefoot material with a Shore hardness index of 60-75 and a rearfoot material with a Shore hardness index of 50-59;

[0181] (4) When the BMI index is 24-28 and the foot pressure is in the front, choose a forefoot material with a Shore hardness index of 40-49 and a rear foot material with a Shore hardness index of 50-59;

[0182] (5) When the BMI index is 24-28 and the foot pressure is medium, choose forefoot and heel materials with a Shore hardness index of 50-59;

[0183] (6) When the BMI index is 24-28 and the foot pressure is at the rear, choose a forefoot material with a Shore hardness index of 50-59 and a rearfoot material with a Shore hardness index of 40-49;

[0184] (7) When the BMI index is greater than 28 and the foot pressure is in the front, choose a forefoot material with a Shore hardness index of 25-39 and a rear foot material with a Shore hardness index of 40-49;

[0185] (8) When the BMI index is greater than 28 and the foot pressure is medium, choose forefoot and heel materials with a Shore hardness index of 40-49;

[0186] (9) When the BMI index is greater than 28 and the foot pressure is at the back, choose a forefoot material with a Shore hardness index of 40-49 and a rear foot material with a Shore hardness index of 25-39.

[0187] Figure 4(1) and 4(2) The schematic diagrams of the disassembly and assembly of the insole of the present invention are respectively shown.

[0188] The insole of the present invention comprises an insole body 40, a full-length insole veneer 41 on the body 40, and a polymer thermoplastic plate 42 below the insole body 40. The polymer thermoplastic plate 42 can cover the arch of the foot and the rear sole 401. The three parts are heat-processed and bonded to form a finished DIY custom insole 4 as shown in Figure 4 (2).

[0189] The DIY insole of the present invention selects corresponding forefoot and rearfoot materials according to the above description, so that the final insole is more in line with the individual's BMI parameters and foot pressure distribution and other information.

[0190] In summary, the method and system of the present invention are simple, fast, have a standard molding, are clean and comfortable, and have high efficiency compared with the traditional plaster molding and footprint molding. Through the gravity of the person and the characteristics of the insole itself, the insole is adapted to the foot shape of the person, and can better meet the functional requirements of increasing the function of the foot. At the same time, it matches the individual foot shape, greatly improving the wearing comfort, and effectively meeting the requirements of the insole for relieving pressure and enhancing sports ability.

[0191] The product of the present invention has a good molding effect, is suitable for personalized customization, and can be made to match the foot shape of each person. Moreover, the operation time of the whole process is short. Compared with the original technology, the working time is shortened from one to two weeks to within 5-10 minutes, greatly improving the working efficiency of custom-made insoles and reducing the labor and product costs in the whole process.

[0192] The present invention has a relatively high degree of intelligence, requires simple operation for operators, is easy to be standardized, is suitable for wide popularization and promotion, and has a broad market prospect.

[0193] Most importantly, the method and system of the present invention integrate the BMI parameter related to body weight and the foot pressure distribution information in the biomechanical line, realize the optimal fitting arch mold factor in the molding process, and comprehensively consider the hardness of the custom-made insole according to the individual differences of users. The whole process is realized through a set of system DIY.

[0194] The basic concepts have been described above. Obviously, for those skilled in the art, the above invention disclosure is only an example and does not constitute a limitation to this application. Although not explicitly stated here, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are proposed in this application, so such modifications, improvements, and corrections still belong to the spirit and scope of the exemplary embodiments of this application.

[0195] At the same time, specific words are used in this application to describe the embodiments of this application. Such as "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0196] The basic concepts have been described above. Obviously, for those skilled in the art, the above invention disclosure is only an example and does not constitute a limitation to this application. Although not explicitly stated here, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are proposed in this application, so such modifications, improvements, and corrections still fall within the spirit and scope of the exemplary embodiments of this application.

[0197] Meanwhile, this application uses specific terms to describe the embodiments of this application. Such as "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0198] Similarly, it should be noted that, in order to simplify the expression of the disclosure of this application and thus help the understanding of one or more inventive embodiments, in the previous description of the embodiments of this application, sometimes multiple features are grouped into one embodiment, drawing, or description thereof. However, this disclosure method does not mean that the features required by the subject matter of this application are more than those mentioned in the claims. In fact, the features of the embodiments are fewer than all the features of the individual embodiments disclosed above. <s

[0199] In some embodiments, numbers are used to describe the components and the quantity of attributes. It should be understood that such numbers used for the description of embodiments are, in some examples, modified by the modifiers "about", "approximate", or "substantially". Unless otherwise stated, "about", "approximate", or "substantially" indicate that the said numbers allow a variation of ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, and such approximate values can change according to the characteristics required by individual embodiments. In some embodiments, the numerical parameters should consider the specified significant digits and adopt the method of retaining the general number of digits. Although the numerical ranges and parameters used to confirm the breadth of the scope in some embodiments of this application are approximate values, in specific embodiments, the setting of such numerical values is as precise as possible within the feasible range.

[0200] Although this application has been described with reference to the current specific embodiments, those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate this application, and various equivalent changes or substitutions can be made without departing from the spirit of this application. Therefore, as long as the changes and variations of the above embodiments are within the scope of the spirit of this application, they will fall within the scope of the claims of this application.

Claims

1. A DIY insole manufacturing method for improving the biomechanical alignment, characterized in that, The method includes: Step 1: Obtain the physical information of the subject, where the physical information includes the BMI index, foot pressure distribution, and footprint; Step 2: Obtain the arch information of the subject according to the footprint; Step 3: Obtain a pre-shaped insole with a recommended hardness by synthesizing the BMI index and the foot pressure distribution; Step 4: Heat and soften the pre-shaped insole, and combine it with an arch mold corresponding to the arch information of the subject to form a customized insole; Among them, the arch mold is obtained according to the footprint and satisfies: Obtain the position coordinates of the first point (A), the second point (A'), and the third point (B) in the footprint, where the first point (A) and the second point (A') are points tangent to the inner forefoot and the heel respectively on a straight line, the fourth point (O) is the midpoint of the line connecting the first point (A) and the second point (A'), and the third point (B) is the intersection point of the extension line of the first point (A) to the highest point (d) of the arch and the perpendicular line of the fourth point (O); The arch mold of the subject satisfies the equation: Among them, b and a satisfy: Among them, A' is the length between the first point (A) and the fourth point (O), and B' is the length between the third point (B) and the fourth point (O).

2. The DIY insole manufacturing method for improving the biomechanical line according to claim 1, characterized in that The arch mold includes several molds for flat arches, normal arches, and high arches corresponding to different foot size ranges respectively.

3. The DIY insole manufacturing method for improving the biomechanical alignment according to claim 1 or 2, characterized in that, Step 3 further includes: (1) When the BMI index is less than 24 and the foot pressure is in the front, select a forefoot material with a Shore hardness index of 50-59 and a heel material with a Shore hardness index of 60-75; (2) When the BMI index is less than 24 and the foot pressure is in the middle, select front and rear sole materials with a Shore hardness index of 60-75; (3) When the BMI index is less than 24 and the foot pressure is in the back, select a forefoot material with a Shore hardness index of 60-75 and a heel material with a Shore hardness index of 50-59; (4) When the BMI index is between 24-28 and the foot pressure is in the front, select a forefoot material with a Shore hardness index of 40-49 and a heel material with a Shore hardness index of 50-59; (5) When the BMI index is between 24-28 and the foot pressure is in the middle, select front and rear sole materials with a Shore hardness index of 5 ​ ​ ​ ​ 4. The DIY insole manufacturing method for improving the biological force line according to claim 3, characterized in that, ​ ​ ​ Step 43, place the pre-shaped insole softened by heating into the foot mold of the vacuum forming unit; Step 44, the subject steps into and stands side by side on the pre-shaped insole again, and place the arch mold between the pre-shaped insoles; Step 45, as the pre-shaped insole cools and hardens at room temperature, the customized insole is formed.

5. A DIY insole manufacturing system for improving the biomechanical alignment, characterized in that, It includes: A pressure detection unit for detecting and obtaining the physical information of the subject, where the physical information includes body weight, foot pressure distribution, and footprint map; A touch screen unit for inputting physical information including height parameters; A main control unit that calculates and provides a pre-shaped insole with a recommended hardness based on the foot pressure distribution, footprint map, body weight, and height parameters; An insole forming unit that combines the pre-shaped insole with the arch mold corresponding to the arch information of the subject to perform footprint collection and pressing forming of the subject; The arch mold is arranged between the arches of the two feet where the subject steps into and forms using the insole forming unit, and the arch mold satisfies: Obtain the position coordinates of the first point (A), the second point (A'), and the third point (B) in the footprint map, where the first point (A) and the second point (A') are points tangent to the inner forefoot and the heel respectively on a straight line, the fourth point (O) is the midpoint of the line connecting the first point (A) and the second point (A'), and the third point (B) is the intersection point of the extension line of the first point (A) to the highest point (d) of the arch and the perpendicular line of the fourth point (O); The arch mold of the subject satisfies the equation: where b and a satisfy: where A' is the length between the first point (A) and the fourth point (O), and B' is the length between the third point (B) and the fourth point (O).

6. The DIY insole manufacturing system for improving the biomechanical alignment according to claim 5, characterized in that The arch mold includes several molds for flat arches, normal arches, and high arches corresponding to different foot size ranges respectively.

7. The DIY insole manufacturing system for improving the biomechanical alignment according to claim 5 or 6, characterized in that The main control unit obtains the BMI index based on height and weight, and makes the following selections by synthesizing this index and the foot pressure distribution: (1) When the BMI index is less than 24 and the foot pressure is in the front, select the forefoot material with a Shore hardness index of 50 - 59 and the rear foot material with a Shore hardness index of 60 - 75; (2) When the BMI index is less than 24 and the foot pressure is in the middle, select the front and rear foot materials with a Shore hardness index of 60 - 75; (3) When the BMI index is less than 24 and the foot pressure is in the rear, select the forefoot material with a Shore hardness index of 60 - 75 and the rear foot material with a Shore hardness index of 50 - 59; (4) When the BMI index is between 24 - 28 and the foot pressure is in the front, select the forefoot material with a Shore hardness index of 40 - 49 and the rear foot material with a Shore hardness index of 50 - 59; (5) When the BMI index is between 24 - 28 and the foot pressure is in the middle, select the front and rear foot materials with a Shore hardness index of 50 - 59; (6) When the BMI index is between 24 - 28 and the foot pressure is in the rear, select the forefoot material with a Shore hardness index of 50 - 59 and the rear foot material with a Shore hardness index of 40 - 49; (7) When the BMI index is greater than 28 and the foot pressure is in the front, select the forefoot material with a Shore hardness index of 25 - 39 and the rearfoot material with a Shore hardness index of 40 - 49; (8) When the BMI index is greater than 28 and the foot pressure is in the middle, select the forefoot and rearfoot materials with a Shore hardness index of 40 - 49; (9) When the BMI index is greater than 28 and the foot pressure is in the rear, select the forefoot material with a Shore hardness index of 40 - 49 and the rearfoot material with a Shore hardness index of 25 - 39.

8. The DIY insole manufacturing system for improving the biological force line according to claim 7, characterized in that, The system further includes: An insole heating unit for heating and softening the pre-shaped insole before shaping.

9. The DIY insole manufacturing system for improving the biomechanical alignment according to claim 8, wherein, The insole shaping unit further includes: An air extraction control unit and a vacuum forming unit. The air extraction control unit includes an air pump for evacuating the inside of the vacuum forming unit and then fitting the pre-shaped insole to the vacuum forming unit for shaping.

10. The DIY insole manufacturing system for improving the biomechanical alignment according to claim 9, characterized in that The pressure detection unit includes a foot pressure plate.

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