Insole with function of automatically adjusting arch support

Abstract

The utility model discloses an insole capable of automatically adjusting arch supporting performance, which belongs to the technical field of insoles, is used for supporting an arch part of a human body and comprises an insole body, and a raised pad is arranged at at least one position of the arch part on a supporting surface of the insole body; the raised pad is made of a water swelling or thermal expansion material; when the raised pad is made of a water-swelling material and the sole of the human body is dry, a gap is reserved between the raised pad and the arch part, and when the sole of the human body is wet, the raised pad swells towards the direction of the sole; when the raised pad is made of a thermal expansion material, a gap is reserved between the raised pad and the arch part when the sole of a human body is at normal temperature, and when the sole is heated, the raised pad expands towards the sole; a gap is reserved between the sole and the arch before exercise, comfort is improved, the protruding pad expands after exercise so as to make contact with the arch and support the arch, descending of the arch is effectively prevented, and the cushioning performance of the arch is better kept.

Description

TECHNICAL FIELD

[0001] The utility model relates to insole technical field especially relates to a kind of insoles with automatic adjustment arch support. BACKGROUND

[0002] In long-distance running or marathon, foot is impacted continuously, which can cause muscle fatigue of foot, resulting in arch drop. At present, whether running shoes or socks, the main performance is in the cushioning, rebound, ventilation, weight and other performance of the material, but no product pays attention to arch drop caused by fatigue, which leads to the decline of foot cushioning ability, and the deformation of running posture is intensified by foot eversion, which not only reduces the sports performance, but also easily induces the occurrence of sports injury.

[0003] Prior art such as Chinese patent publication No. CN106466000A discloses an arch insole for supporting the foot of a person, which includes a pad and an arch piece. The pad extends to form a forefoot, an arch and a heel corresponding to the foot of the person, and has an arc shape following the shape of the foot bottom of the person. The arch pad is attached to the bottom surface of the pad to support the arch of the person. The arch pad includes a core part, a first extension part and a groove, wherein the first extension part is arranged around the core part, and the groove is arranged between the core part and the first extension part.

[0004] Although the above-mentioned patent sets an arch pad on the insole for supporting the foot, but it is inevitable to deviate after exercise, so that the arch pad cannot completely fit the foot of the wearer. UTILITY MODEL CONTENT

[0005] The utility model provides a kind of insoles with automatic adjustment arch support, can change with the movement state of wearer, to adhere to foot bottom and support, effectively prevent the drop of arch, so that better keep its arch cushioning performance.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] An insole with automatic adjustment arch support for supporting the arch of a person includes an insole body, and a raised pad is provided on the support surface of the insole body at at least one position corresponding to the arch. The raised pad is made of a material that swells when exposed to water or heat. When the raised pad is made of a material that swells when exposed to water, a gap is left between the raised pad and the arch when the foot bottom of the person is dry, and the raised pad swells towards the foot bottom and comes into contact with the arch when the foot bottom of the person is wet. When the raised pad is made of a material that swells when exposed to heat, a gap is left between the raised pad and the arch when the foot bottom of the person is at room temperature, and the raised pad swells towards the foot bottom and comes into contact with the arch when the foot bottom is warmed up.

[0008] The utility model discloses a preferred technical scheme lies in when the protuberant pad is set to meet the thermal expansion material, the protuberant pad's material quality is shape memory alloy.

[0009] The utility model discloses a preferred technical scheme lies in the shape memory alloy is nickel titanium alloy.

[0010] The utility model discloses a preferred technical scheme lies in when the protuberant pad is set to meet the water expansion material, the protuberant pad's material quality is polyurethane resin or high water absorbent resin, the polyurethane resin is PU glue or PUR glue, and the high water absorbent resin is one of starch grafting acrylate, grafting acrylamide, high substitution degree crosslinking carboxymethyl cellulose, crosslinking carboxymethyl cellulose grafting acrylamide, crosslinking type hydroxyethyl cellulose grafting acrylamide polymer.

[0011] The utility model discloses a preferred technical scheme lies in the protuberant pad is set to air cushion, and the air cushion is filled with gas.

[0012] The utility model discloses a preferred technical scheme lies in the gas filled in the air cushion is nitrogen.

[0013] The utility model discloses a preferred technical scheme lies in the protuberant pad is at least partially inlaid to the support surface of insole body.

[0014] The utility model discloses a preferred technical scheme lies in the outside of protuberant pad is covered with cloth.

[0015] The utility model discloses a preferred technical scheme lies in when the protuberant pad is located at the transverse arch position of arch part, the shape of protuberant pad is consistent with the shape of transverse arch, and when the protuberant pad is located at the middle waist position of arch part, the shape of protuberant pad is consistent with the shape of the middle waist position of arch part.

[0016] The utility model discloses a preferred technical scheme lies in when the protuberant pad is located at the transverse arch position of arch part, the shape of protuberant pad is consistent with the shape of transverse arch, and when the protuberant pad is located at the middle waist position of arch part, the shape of protuberant pad is consistent with the shape of the middle waist position of arch part.

[0017] (1) through setting up protuberant pad on insole body, and protuberant pad can expand along with the motion state change of wearer, thereby contacting with the arch part of human body, effectively preventing the drop of arch, thereby better keeping the cushioning performance of arch, and then maintaining good motion state.

[0018] (2) the selection of material is various, and the suitable material can be selected from temperature and humidity, so that the motion of wearer is guaranteed. DRAWINGS

[0019] Figure 1 It is the whole structure schematic diagram of insole with automatic adjustment arch support property provided in the embodiment of the utility model,

[0020] Figure 2 This is a schematic diagram of the overall structure of the insole with automatic arch support provided in a specific embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the overall structure of the insole with automatic arch support provided in a specific embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the overall structure of the insole with automatic arch support provided in a specific embodiment of the utility model, which is not convex before exercise;

[0023] Figure 5 This is a schematic diagram of the overall structure of the insole with automatic arch support provided in a specific embodiment of the utility model being lifted up after exercise;

[0024] Figure 6 This is a schematic diagram of the overall structure of the raised pad of the insole with automatic arch support provided in a specific embodiment of the utility model before exercise;

[0025] Figure 7 This is a schematic diagram of the overall structure of the raised pad of the insole with automatic arch support provided in a specific embodiment of the utility model being lifted up after exercise;

[0026] Figure 8 This is a schematic diagram of the overall structure of the raised pad of the insole with automatic arch support provided in a specific embodiment of the utility model, in which the air cushion is not raised before exercise;

[0027] Figure 9 This is a schematic diagram of the raised pad structure of the insole with automatic arch support provided in the specific embodiment of the utility model, with the air cushion lifted after exercise

[0028] In the picture:

[0029] 1. Insole body; 2. Raised pad; 3. Gap; 4. Arch of the foot; 5. Air cushion; 6. Fabric. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0031] like Figures 1-9 As shown, the present invention provides an insole with automatically adjustable arch support, which is used to support the wearer's arch 4. The insole includes an insole body 1 that substantially conforms to the shape of the human foot sole. A raised pad 2 is provided on the support surface of the insole body 1 at at least one location on the arch 4. For example, the raised pad 2 may be provided at the mid-arch position and / or the transverse arch of the arch 4.

[0032] The raised pad 2 is made of a material that swells when heated or when wet, so that when the wearer moves, the arch 4 is heated or the arch 4 sweats and the sweat flows onto the raised pad 2, the raised pad 2 can be raised to fit the arch 4, the higher the temperature or humidity, the closer the fit, supporting the arch 4, effectively preventing the arch from falling, thereby better maintaining its arch shock-absorbing performance, and thus maintaining a good sports state.

[0033] When the raised pad 2 is provided on the insole body 1, when the human body normally wears the insole, there is a gap 3 between the insole body 1 and the arch 4, and no discomfort is caused; when the human body moves, the foot heat increases, causing the temperature to rise or the sweat to be wet, at this time the material of the raised pad 2 will swell, filling the gap 3, thereby achieving the purpose of supporting the arch 4.

[0034] The outer side of the raised pad 2 can also be covered with cloth 6, and the cloth 6 is made of the same material as the cloth of the insole body 1.

[0035] Because the foot will heat and sweat during exercise, the temperature in the shoe cavity can reach more than 40 degrees, and a large amount of sweating will cause the insole to be soaked, so the material of the raised pad 2 is made of a material that swells when wet or when heated, and the following examples can be used.

[0036] Preferably, the raised pad 2 is at least partially embedded in the support surface of the insole body 1, so that the human body is not easy to displace during activity.

[0037] Example 1

[0038] The thermal expansion material of the raised pad 2 is a shape memory alloy, preferably a nickel-titanium alloy, which has a unique property that the crystal structure is different above and below 40 degrees Celsius. In a high temperature environment, the crystal structure of the nickel-titanium alloy has high symmetry, while when the temperature is below 40 degrees, the single orientation at high temperature will change to a martensite variant with different orientations. This temperature-dependent crystal structure change is the basis for shape memory alloys to "remember" their original shape and restore that shape when subjected to external stimuli (40 degrees). The shape memory alloy is adhered to the insole body 1 by glue.

[0039] Example 2

[0040] The material of the raised pad 2 can also use PU glue, which belongs to water-swellable material, moisture-curing reaction type polyurethane hot melt adhesive, the main component is isocyanate-terminated polyurethane prepolymer, PU primer resin is PU-261, which is a hydrophilic polyurethane resin with high peel strength, high moisture permeability and excellent water washing resistance. Appearance: light yellow viscous liquid viscosity (CPS / 25°C): 60000-90000 solid content (%): 45±2, PU-261 can be crosslinked with isocyanate resin and amino resin crosslinking agent, the ratio of PU-261-100g, C09-4g, CRL-2g, C06-2g, solvent (DMF / TOL) is appropriate, the curing condition is 135-145°C x 3-5, and the prepared primer is brushed on the upper surface of the insole body 1 according to requirements, and the glue thickness is 0.5mm; PU fabric resin PU-729 is a high-moisture-permeable aromatic polyurethane resin for surface coating, appearance: light yellow viscous liquid, viscosity (CPS / 25°C): 20000-50000, solid content (%): 30±2, tensile strength 30MPa, elongation at break 650%, 100% modulus 4, PU-729 contains SiO2, which needs to be stirred before use. Curing condition: 135-145°C x 3-5 minutes, pu-726 is brushed on the primer, and the printing is 5-10 times, and the total thickness of pu-726 is 2mm.

[0041] After printing the above PU glue on the insole body 1, the insole is soaked in sweat, and the glue part will swell after absorbing water.

[0042] Polyurethane (PUR) is a polymer with a urethane chain segment repeat unit, which is prepared by the reaction of isocyanate and polyol. PUR products are divided into two categories: foamed products and non-foamed products. Foamed products include soft, hard and semi-hard PUR foam plastics. Non-foamed products include coatings, adhesives, synthetic leather, elastomers and elastic fibers, etc.

[0043] PUR glue is accompanied by chemical reactions during physical changes. After complete curing, it will not melt when heated, and it is irreversible. It has a low application temperature, can reach the initial bonding strength in a few minutes, and has excellent final bonding strength and reliability. PUR glue is widely used in consumer electronics, IOT related industries and markets, suitable for bonding various materials, especially precise dispensing, and can achieve excellent waterproof sealing.

[0044] PUR glue needs to be packaged in a sealed manner, and the general heating temperature during use is between 110-130°C. It has fast curing speed, good bonding strength and impact resistance. PUR glue does not use solvents and chemicals, has good environmental performance, is safe to human body and environment, and meets environmental protection requirements.

[0045] Example 3

[0046] The raised pad 2 can also use super absorbent polymer (SAP), which is also a water-swellable material, has hydrophilic groups, and can absorb sweat and swell. Currently, there are super absorbent polymers on the market, such as starch grafted acrylate, grafted acrylamide, high-substitution degree cross-linked carboxymethyl cellulose, cross-linked carboxymethyl cellulose grafted acrylamide, cross-linked hydroxyethyl cellulose grafted acrylamide polymer, etc. However, since the super absorbent polymer swells into a hydrogel after absorbing water, it cannot separate the sweat again, so the raised pad 2 is disposable, that is, it can be detachably connected to the insole body 1, and can be combined with the insole body 1 by double-sided adhesive tape or magic tape, etc. for disassembly and replacement.

[0047] Embodiment 4

[0048] Part of the raised pad 2 is made into an air cushion 5, nitrogen gas is injected into the air cushion 5, the nitrogen gas moves more intensively at 40 degrees, and the volume of the air cushion increases in the sealed air bag, thereby supporting the arch 4.

[0049] Since the ground clearance gradually decreases from the medial longitudinal arch to the lateral longitudinal arch, in order to better support the arch 4, the thickness of the raised pad 2 gradually decreases from the medial side of the insole body 1 to the lateral side of the insole body, so that the shape of the raised pad 2 is consistent with the waist of the arch 4, and especially for people with abnormal foot shapes such as flat feet, the raised pad 2 can effectively support the "descending" bones and joints on the medial longitudinal arch and maintain the arch curvature. Similarly, when the raised pad 2 is located at the transverse arch position of the arch 4, the shape of the raised pad 2 is consistent with the shape of the transverse arch, that is, the middle thickness of the raised pad 2 is the largest, and gradually decreases towards both ends, so that the raised pad 2 can better support the transverse arch.

[0050] The utility model is described through preferred embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. The utility model is not limited by the specific embodiments disclosed herein, and other embodiments falling within the scope of the claims of the present application all belong to the scope of protection of the utility model.

Claims

1. A shoe insole with automatic adjustment of arch support, used to support the arch (4) of a human body, characterized in that: it comprises a shoe insole body (1), and a raised pad (2) is arranged on the supporting surface of the shoe insole body (1) at at least one position of the arch (4); the raised pad (2) is made of water-swelling or heat-swelling material; when the raised pad (2) is made of water-swelling material, a gap (3) is left between the raised pad (2) and the arch (4) when the sole of the human body is dry, and the raised pad (2) swells towards the sole and contacts the arch (4) when the sole of the human body is wet; when the raised pad (2) is made of heat-swelling material, a gap (3) is left between the raised pad (2) and the arch (4) when the sole of the human body is at room temperature, and the raised pad (2) swells towards the sole and contacts the arch (4) when the sole is warmed.

2. The shoe insole with automatic adjustment of arch support according to claim 1, characterized in that: when the raised pad (2) is made of heat-swelling material, the raised pad (2) is made of shape memory alloy.

3. The shoe insole with automatic adjustment of arch support according to claim 2, characterized in that: the shape memory alloy is nickel-titanium alloy.

4. The shoe insole with automatic adjustment of arch support according to claim 1, characterized in that: when the raised pad (2) is made of water-swelling material, the raised pad (2) is made of polyurethane resin or superabsorbent resin; the polyurethane resin is PU glue or PUR glue; and the superabsorbent resin is one of starch grafted acrylate, grafted acrylamide, high-substitution cross-linked carboxymethyl cellulose, cross-linked carboxymethyl cellulose grafted acrylamide, and cross-linked hydroxyethyl cellulose grafted acrylamide polymer.

5. The shoe insole with automatic adjustment of arch support according to claim 1, characterized in that: the raised pad (2) is a gas pad (5) filled with gas.

6. The shoe insole with automatic adjustment of arch support according to claim 5, characterized in that: the gas filled in the gas pad (5) is nitrogen.

7. The shoe insole with automatic adjustment of arch support according to claim 1, characterized in that: the raised pad (2) is at least partially embedded in the supporting surface of the shoe insole body (1).

8. The shoe insole with automatic adjustment of arch support according to claim 1, characterized in that: the outer side of the raised pad (2) is covered with cloth (6).

9. The shoe insole with automatic adjustment of arch support according to any one of claims 1-8, characterized in that: when the raised pad (2) is located at the transverse arch position of the arch, the shape of the raised pad (2) is consistent with the shape of the transverse arch; and when the raised pad (2) is located at the middle waist position of the arch, the shape of the raised pad (2) is consistent with the shape of the middle waist position of the arch. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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