Insole capable of supporting foot arch and preparation method thereof

Abstract

The invention relates to the technical field of articles of daily use, and discloses an insole capable of supporting a foot arch and a preparation method thereof.The insole capable of supporting the foot arch comprises an insole body and a foot arch supporting structure located at the foot arch position of the insole body; the insole body comprises a first surface and a second surface, and the first surface acts on the sole of a human body; the arch supporting structure is located between the first surface and the second surface of the insole body, is in a protruding shape, is thick in the middle and is gradually thinned on the two sides, and acts on the arch of the human body. The protruding part of the arch supporting structure is attached to the first surface of the insole body, and the bottom of the arch supporting structure is smoothly connected with the second surface of the insole body. When the insole capable of supporting the foot arch is used, foot pressure is effectively dispersed and foot fatigue is relieved through the supporting structure at the foot arch part, the air permeability and sweat absorption of the insole are improved by adopting the opening design, and the comfort and durability of the insole in long-term use are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of daily necessities, and in particular to an insole capable of supporting a foot arch and a preparation method thereof. Background Art

[0002] Insoles are widely used in the fields of shoemaking, health care, special functions, etc., and are generally divided into two modes: shoemaking application insoles and market commodity insoles. The shoemaking application insoles are mainly used to match the outsole and midsole of the shoe to make the corresponding shape; the size plate is made according to the last plate or panel, and the corresponding shape is made. Market commodity insoles are mainly sold directly as a commodity, designed by developers and circulated in the market.

[0003] The foot is an important part of the human body, with 26 bones, 33 joints, 20 muscles of different sizes, 114 strong ligaments, countless sensitive nerves and rich blood vessels. Therefore, it is also called the second heart of the human body. Therefore, the health of the foot is closely related to the health of the whole body. The arch of the foot is formed by the tarsal bones and metatarsal bones connected by ligaments and joints. It is an arched structure, which makes the foot strong, light and elastic. It can withstand greater pressure and buffer the vibration caused by walking, running and jumping. At the same time, it can also protect the blood vessels and nerves of the sole from compression. If the soft tissue (ligaments, muscles, etc.) that maintains the arch of the foot is congenitally dysplastic or the soft tissue that maintains the arch of the foot is overstrained or fractured, it can cause the arch of the foot to collapse and flatten, forming a flat foot, also known as flat foot deformity, which leads to limited activity. At present, there are many insole products on the market, but most ordinary insoles lack an effective arch support structure. When walking or standing for a long time, the lack of arch support can easily lead to foot fatigue, pain, and even foot diseases. Some insoles with arch support function have problems such as poor support effect, poor comfort or insufficient durability. Therefore, in order to avoid the above problems, there is an urgent need for an insole that can provide good arch support and has both comfort and durability. Summary of the invention

[0004] In view of this, the present invention proposes an insole with arch support and a preparation method thereof, aiming to solve the problems of poor supporting effect, poor comfort and insufficient durability of the arch support insole in the current technology.

[0005] In one aspect, the present invention provides an insole capable of supporting an arch of the foot, comprising an insole body and an arch supporting structure located at the arch position of the insole body;

[0006] The insole body comprises a first surface and a second surface, wherein the first surface acts on the sole of a human foot;

[0007] The arch support structure is located between the first surface and the second surface of the insole body, and is convex, thick in the middle and gradually thinner on both sides, and acts on the arch of the human body;

[0008] The raised portion of the arch support structure is attached to the first surface of the insole body, and the bottom of the arch support structure is smoothly connected to the second surface of the insole.

[0009] Preferably, the first surface of the insole body is made of a breathable and sweat-absorbent material, and the second surface of the insole body is made of a wear-resistant and highly elastic material.

[0010] Preferably, the breathable and sweat-absorbent material on the first surface of the insole body comprises a leather material, and the wear-resistant and highly elastic material on the second surface of the insole body comprises an ethylene-vinyl acetate copolymer material.

[0011] Preferably, the connection between the first surface of the insole body and the raised portion of the arch support structure is a porous surface, which increases the air permeability of the first surface of the insole body.

[0012] Preferably, the arch support structure is made of elastic material.

[0013] Preferably, the elastic material used in the arch support structure includes ethylene-vinyl acetate copolymer material.

[0014] Preferably, the length of the arch support structure is 65-75 mm, and the height from the top protrusion of the arch support structure to the bottom of the arch support structure is 15-20 mm.

[0015] Preferably, the length of the arch support structure is 68-72 mm, and the height from the top protrusion of the arch support structure to the bottom of the arch support structure is 16-18 mm.

[0016] On the other hand, the present invention also provides a method for preparing the insole capable of supporting the arch of the foot, comprising the following steps:

[0017] (1) Mold design and cutting: The insole body is made using mold cutting technology;

[0018] (2) Punching: Punching holes at the arch of the first surface of the insole body;

[0019] (3) Installation of the support structure: fix the arch support structure to the arch position of the insole body;

[0020] (4) Lamination: The first surface of the insole body, the arch support structure and the second surface of the insole body are sequentially laminated, and hot pressing is used to form an insole that can initially support the arch;

[0021] (5) Post-processing: After trimming the edges of the preliminary insole with arch support, the insole with arch support is obtained.

[0022] Preferably, the fixing method in step (3) includes applying glue and / or sewing.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention discloses an insole capable of supporting an arch of the foot, comprising an insole body and an arch supporting structure located at the arch of the foot of the insole body; the insole body comprises a first surface and a second surface, the first surface acting on the sole of the human foot; the arch supporting structure is located between the first surface and the second surface of the insole body, and is convex, thick in the middle, and gradually thinning on both sides, acting on the arch of the human foot; the convex part of the arch supporting structure is attached to the first surface of the insole body, and the bottom of the arch supporting structure is smoothly connected to the second surface of the insole. When the insole capable of supporting an arch of the foot provided by the present invention is used, the support structure at the arch of the foot effectively disperses the pressure on the foot, reduces foot fatigue, and prevents foot diseases.

[0025] The present invention further defines that the first surface of the insole body is a breathable sweat-absorbent material, and the second surface of the insole body is a wear-resistant high-elastic material, and the breathable sweat-absorbent material includes a cortical material, and the wear-resistant high-elastic material includes an ethylene-vinyl acetate copolymer material. The present invention selects cortical material as the first surface material of the insole body, and the tiny pores between the dermal fibers can promote air circulation and reduce the stuffiness of the feet. At the same time, the cortical material can absorb sweat and evaporate slowly (especially after punching), keep the feet dry, and reduce the risk of fungal growth. In addition, the surface of the cortical material is delicate and skin-friendly, which can reduce the blistering or wear of the feet caused by friction, and has a certain ductility, which can be slightly deformed with the shape of the foot to enhance the sense of wrapping. Not only that, the cortical material has strong tear resistance, is not easy to deform or crack after long-term use, and the surface dense structure can resist daily wear and tear, extending the service life of the insole. The tannic acid component in the cortical material can also inhibit bacterial reproduction, reduce odor, and the surface is smooth, and stains are not easy to penetrate.

[0026] The present invention selects ethylene-vinyl acetate copolymer material (EVA) as the second surface material of the insole body. The density range of the material (0.15-0.30g / cm 3), which is significantly lighter than rubber or TPU materials, reduces the overall weight of the insole and relieves the burden on the foot, making it suitable for people who stand or exercise for a long time. In addition, the closed-cell foam structure of EVA can provide excellent resilience (rebound rate ≥ 70%), effectively absorb impact when walking or running, and reduce vibration damage to the foot and knee joints. At the same time, it disperses the pressure on the sole of the foot through material deformation and relieves the local high-pressure areas of the heel and forefoot. The dense surface layer of EVA can resist insole friction, and also has high wear resistance and compression deformation resistance, avoiding support failure caused by long-term use.

[0027] The present invention further defines that the connection between the first surface of the insole body and the raised portion of the arch support structure is a porous surface, thereby increasing the air permeability of the first surface of the insole body and ensuring comfort and durability for long-term use.

[0028] The present invention further defines that the arch support structure is made of an elastic material, and the elastic material includes an ethylene-vinyl acetate copolymer material. The ethylene-vinyl acetate copolymer material gives the arch support structure excellent resilience, wear resistance and compression deformation resistance, thereby enhancing the durability and comfort of the arch support insole and extending its service life.

[0029] The present invention further defines that the length of the arch support structure is 65-75mm, and the height from the top protrusion of the arch support structure to the bottom of the arch support structure is 15-20mm. This size range is designed according to the arch shape and size of most people, so it can better adapt to the foot structure of different users and provide comfortable support. The arch support with a length of 65-75mm can better disperse the foot pressure, reduce the risk of foot sprain, and maintain the stability of the foot. The height of 15-20mm can effectively support the arch of the foot and reduce the fatigue and pressure of the arch of the foot when standing or walking for a long time. During exercise, the arch support can provide better force transmission and motion control, thereby improving sports performance. It can help prevent foot diseases such as flat feet and plantar fasciitis, especially for people with collapsed arches or problems with foot structure. At the same time, the appropriate arch support size can also improve gait, help users maintain a correct walking posture, and reduce pressure on the knees, hip joints and waist. Help reduce excessive fatigue of calf muscles and foot muscles, thereby improving endurance for long-term activities.

[0030] The present invention also provides a method for preparing the above-mentioned insole with arch support, comprising the following steps: (1) mold design and cutting: using mold cutting technology to make the insole body; (2) punching treatment: punching the arch position of the first surface of the insole body; (3) installation of the support structure: fixing the arch support structure at the arch position of the insole body; (4) lamination: sequentially superimposing the first surface of the insole body, the arch support structure and the second surface of the insole body, and using hot pressing to obtain a preliminary insole with arch support; (5) post-processing: trimming the edges of the above-mentioned preliminary insole with arch support to obtain the insole with arch support. The preparation method of the insole with arch support provided by the present invention is simple, and the standardization of the shape and size of the insole is ensured through mold design and cutting, which is conducive to large-scale production and quality control; the designed insole conforms to the structure of the human foot and can provide better comfort and support; the punching process increases the air permeability of the insole, which helps to reduce foot sweating and keep the foot dry; through lamination and hot pressing, the three-layer structure of the insole body (first surface, arch support structure and second surface) can be ensured to be firmly combined to improve the overall durability. The present invention further defines that the fixing method described in step (3) includes glue application and / or sewing, and the arch support structure is fixed by the method of glue application and / or sewing, which can ensure the stability and durability of the support structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 It is a schematic diagram of the first surface of the insole body of the present invention;

[0033] Figure 2 is a schematic diagram of the second surface of the insole body of the present invention;

[0034] Figure 3 It is a schematic diagram of the arch support structure of the present invention.

[0035] Among them, 110, the first surface; 111, the porous surface; 112, the second surface; 113, the arch support structure. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] As attached Figure 1 -Attached Figure 3 As shown, an insole capable of supporting the arch of the foot comprises an insole body and an arch supporting structure 113 located at the arch position of the insole body;

[0038] The insole body includes a first surface 110 and a second surface 112, wherein the first surface 110 acts on the sole of a human foot;

[0039] The arch support structure 113 is located between the first surface 110 and the second surface 112 of the insole body, and is convex, thick in the middle and gradually thinner on both sides, and acts on the arch of the human body;

[0040] The raised portion of the arch support structure 113 is attached to the first surface 110 of the insole body, and the bottom of the arch support structure 113 is smoothly connected to the second surface 112 of the insole.

[0041] In some embodiments of the present invention, the first surface 110 of the insole body is made of a breathable and sweat-absorbent material, and the second surface 112 of the insole body is made of a wear-resistant and highly elastic material.

[0042] In some embodiments of the present invention, the breathable and sweat-absorbent material of the first surface 110 of the insole body includes a cortical material, and the wear-resistant and highly elastic material of the second surface 112 of the insole body includes an ethylene-vinyl acetate copolymer material. The cortical material has good air permeability, which can promote air circulation and reduce the stuffiness of the feet. In addition, the surface of the cortical material is delicate and skin-friendly, which can reduce blistering or wear of the feet caused by friction and extend the service life of the insole. Ethylene-vinyl acetate copolymer material (EVA) has a lower density, which can reduce the overall weight of the insole and reduce the burden on the foot. The closed-cell foam structure can provide excellent resilience, effectively absorb impact force, reduce vibration damage to the foot and knee joints, and alleviate local high-pressure areas of the heel and forefoot. The surface dense layer of EVA can resist insole friction, and also has high wear resistance and compression deformation resistance, avoiding support failure caused by long-term use.

[0043] In some embodiments of the present invention, the connection between the first surface 110 of the insole body and the raised portion of the arch support structure 113 is a porous surface 111, which increases the air permeability of the first surface 110 of the insole body.

[0044] In some embodiments of the present invention, the arch support structure 113 is made of elastic material.

[0045] In some embodiments of the present invention, the elastic material used in the arch support structure 113 includes ethylene-vinyl acetate copolymer material. The ethylene-vinyl acetate copolymer material gives the arch support structure 113 excellent resilience, wear resistance and compression deformation resistance, enhances the durability and comfort of the arch support insole, and prolongs its service life.

[0046] In some embodiments of the present invention, the length of the arch support structure 113 is 65-75 mm, and the height from the top protrusion of the arch support structure 113 to the bottom of the arch support structure 113 is 15-20 mm. This size range can better adapt to the foot structure of different users, provide more comfortable support, better disperse foot pressure, and reduce the risk of foot sprains and fatigue pressure of the arch.

[0047] In some embodiments of the present invention, the length of the arch support structure 113 is 68-72 mm, and the height from the top protrusion of the arch support structure 113 to the bottom of the arch support structure 113 is 16-18 mm.

[0048] The present invention also provides a method for preparing the above-mentioned insole capable of supporting the arch of the foot, comprising the following steps:

[0049] (1) Mold design and cutting: The insole body is made using mold cutting technology;

[0050] (2) Punching: Punching holes at the arch of the first surface of the insole body;

[0051] (3) Installation of the support structure: fix the arch support structure to the arch position of the insole body;

[0052] (4) Lamination: The first surface of the insole body, the arch support structure and the second surface of the insole body are sequentially laminated, and hot pressing is used to form an insole that can initially support the arch;

[0053] (5) Post-processing: After trimming the edges of the preliminary arch-supporting insole, an arch-supporting insole is obtained.

[0054] The method for preparing the insole with arch support provided by the present invention is simple and can ensure the standardization of the shape and size of the insole through mold design and cutting, which is conducive to large-scale production and quality control; the designed insole conforms to the structure of the human foot and can provide better comfort and support; the punching process increases the air permeability of the insole, which helps to reduce foot sweating and keep the foot dry; through lamination and hot pressing, it can ensure that the three-layer structure of the insole body (the first surface, the arch support structure and the second surface) is firmly combined to improve the overall durability.

[0055] In some embodiments of the present invention, the fixing method in step (3) includes applying glue and / or sewing, which can ensure the stability and durability of the supporting structure.

[0056] Example 1

[0057] This embodiment provides an insole capable of supporting an arch of the foot, comprising an insole body and an arch supporting structure located at the arch position of the insole body;

[0058] The insole body includes a first surface and a second surface, and the first surface acts on the sole of a human foot;

[0059] The arch support structure is located between the first surface and the second surface of the insole body. It is convex, thick in the middle and gradually thinner on both sides. It acts on the human arch. Figure 3 shown.

[0060] The raised part of the arch support structure is attached to the first surface of the insole body, and the bottom of the arch support structure is smoothly connected to the second surface of the insole.

[0061] The first surface of the insole body is made of leather material, and the second surface of the insole body is made of yellow Fulilong material.

[0062] The connection between the first surface of the insole body and the raised portion of the arch support structure is a porous surface, which increases the air permeability of the first surface of the insole body.

[0063] The arch support structure adopts a water blue crescent foam cushion core material. The length of the arch support structure is 70mm, and the height from the top protrusion of the arch support structure to the bottom of the arch support structure is 17mm.

[0064] The method for preparing the above-mentioned insole capable of supporting the arch of the foot comprises the following steps:

[0065] (1) Mold design and cutting: Use CNC machine tools to make ergonomic molds, and cut the first surface of the insole body and the second surface of the insole body according to the mold contour. The tolerance is controlled within ±0.5mm (to ensure that the shape of the insole conforms to the shape of the human foot).

[0066] (2) Punching treatment: laser punching (hole diameter 0.5 mm, hole spacing 2 mm) is performed on the arch position of the first surface (leather material) of the insole body to enhance air permeability;

[0067] (3) Installation of the support structure: Inject the EVA material into a crescent-shaped mold, foam it at 150°C and 0.5 MPa for 20 minutes, take it out and cool it down to obtain the arch support structure. Apply the arch support structure to the arch position of the insole body with environmentally friendly polyurethane glue;

[0068] (4) Lamination: The first surface of the insole body, the arch support structure and the second surface of the insole body are sequentially stacked and sent into a hot press machine for hot pressing for 30 seconds at a temperature of 100° C. and a pressure of 5 MPa to obtain a preliminary insole with arch support;

[0069] (5) Post-processing: Use a high-frequency cutting machine to remove excess burrs from the preliminary arch-supporting insole, and polish the trimmed edges (sandpaper grit 400), to finally obtain an arch-supporting insole with a smooth surface that fits the arch of the foot.

[0070] Finished product verification

[0071] The arch support insole prepared in Example 1 was subjected to a compression test, and the test results showed that the compressive strength of the arch support structure of the insole was 85 kPa, and the air permeability (ASTM D737 standard) of the arch support insole was 350 L / m 2 / s, meets the requirements of human arch support and comfort.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An insole capable of supporting the arch of the foot, characterized in that: It includes an insole body and an arch support structure located at the arch position of the insole body; The insole body comprises a first surface and a second surface, wherein the first surface acts on the sole of a human foot; The arch support structure is located between the first surface and the second surface of the insole body, and is convex, thick in the middle and gradually thinner on both sides, and acts on the arch of the human body; The raised portion of the arch support structure is attached to the first surface of the insole body, and the bottom of the arch support structure is smoothly connected to the second surface of the insole.

2. The insole with arch support according to claim 1, characterized in that: The first surface of the insole body is made of a breathable and sweat-absorbent material, and the second surface of the insole body is made of a wear-resistant and highly elastic material.

3. The insole with arch support according to claim 2, characterized in that: The breathable and sweat-absorbent material on the first surface of the insole body comprises a leather material, and the wear-resistant and highly elastic material on the second surface of the insole body comprises an ethylene-vinyl acetate copolymer material.

4. The insole with arch support according to claim 1, characterized in that: The connection between the first surface of the insole body and the raised portion of the arch support structure is a porous surface, which increases the air permeability of the first surface of the insole body.

5. The insole with arch support according to claim 1, characterized in that: The arch support structure is made of elastic material.

6. The insole with arch support according to claim 5, characterized in that: The elastic material used in the arch support structure includes ethylene-vinyl acetate copolymer material.

7. The insole with arch support according to claim 1, characterized in that: The length of the arch support structure is 65-75 mm, and the height from the top protrusion of the arch support structure to the bottom of the arch support structure is 15-20 mm.

8. The insole capable of supporting the arch of the foot according to claim 7, characterized in that: The length of the arch support structure is 68-72 mm, and the height from the top protrusion of the arch support structure to the bottom of the arch support structure is 16-18 mm.

9. The method for preparing an insole capable of supporting the arch of a foot according to any one of claims 1 to 8, characterized in that: The following steps are involved: (1) Mold design and cutting: The insole body is made using mold cutting technology; (2) Punching: Punching holes at the arch of the first surface of the insole body; (3) Installation of the support structure: fix the arch support structure to the arch position of the insole body; (4) Lamination: The first surface of the insole body, the arch support structure and the second surface of the insole body are sequentially laminated, and hot pressing is used to form an insole that can initially support the arch; (5) Post-processing: After trimming the edges of the preliminary insole with arch support, the insole with arch support is obtained.

10. The method for preparing an insole capable of supporting the arch of a foot according to claim 9, characterized in that: The fixing method in step (3) includes applying glue and / or sewing.

Images