Shoe capable of adjusting tightness of instep and easy to put on and take off

Abstract

The invention discloses a pair of shoes capable of adjusting the tightness of insteps and easy to put on and take off, belongs to the technical field of shoes, and is suitable for diabetic patients, old people and other people with easily-swollen feet or limited limb movement and common users. The shoe aims at solving the problems that an existing shoe needs to be manually adjusted to be put on and taken off and is difficult to adapt to foot swelling. The technical scheme is characterized in that a vamp body is made of breathable knitted fabric; the shoe tongue is internally provided with a shape memory resin supporting piece (which is provided with a hollow area and is overlapped and sewn to form an upper warping surface body) to prevent inward rolling; a multi-curved-surface resin protective shell is embedded in the shoe heel part, so that one-step pedaling is realized, and heel falling is prevented; the instep is provided with a magic tape adjusting belt (which can be integrally or split into three independent sub-belts) with the width of 4-6cm, and the girth can be adjusted; the lining is of a buffering structure, and feet are prevented from being placed. The wearing and taking-off time is shorter than or equal to 2 seconds, the oppression disappearance rate of a diabetic patient after swelling regulation is 88%, the cost is low, mass production is easy, and convenience and comfort are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of footwear products, in particular to a shoe with integrated functions of "convenient wearing and taking off" and "dynamic tightness adjustment", which is particularly suitable for user groups with swollen feet or limited limb movement, such as diabetic patients, the elderly and postoperative rehabilitation patients, and can also meet the needs of ordinary users for wearing convenience and comfort. BACKGROUND

[0002] The existing shoe products have systematic deficiencies in meeting the needs of special groups, mainly in the following aspects.

[0003] 1. Poor wearing and taking-off convenience.

[0004] The traditional tongue is prone to collapse and roll in, and manual adjustment is often required when wearing and taking off. The heel lacks a guiding structure and needs to be bent or assisted by hand, which is extremely inconvenient for people with limited mobility. Although there are improvements such as heel lifting belts, they only solve the problem of taking off shoes and do not optimize the tongue rolling phenomenon, so wearing and taking off still require manual intervention. In addition, the "mechanical knob tightening shoe" structure on the market is complex, high in cost, and requires manual operation of mechanical parts, making it difficult to achieve mass market popularity, and the wearing and taking-off convenience has not been fundamentally improved.

[0005] 2. Insufficient dynamic adaptability.

[0006] The size of human feet changes dynamically due to blood circulation, temperature, and pathological reasons such as diabetes, with a daily circumference change of 3-5 cm. However, most existing shoes have a static fixed design: air bag shoes need to be manually inflated and have limited adjustment range (only 2-3 cm), and simple adjustment shoes only have single-area tightness adjustment, which cannot adapt to the full range of foot swelling in real time. Over-tightness can easily compress blood vessels and affect blood circulation, and over-looseness can cause the shoes to not follow the feet, increasing the risk of walking.

[0007] Therefore, there is an urgent need in the art for an innovative shoe that can systematically solve the problems of wearing and taking-off convenience, dynamic adaptability, and overall comfort, achieving the integrated functions of "no need for auxiliary wearing and taking-off + real-time adaptation to swelling". SUMMARY

[0008] The present application aims to solve the defects of the prior art and provide a shoe that can achieve "one-foot kick" wearing and taking-off and precise adjustment of foot arch tightness, taking into account the pathological needs of special groups and the daily needs of ordinary users, while also having the feasibility of low-cost mass production. TECHNICAL SOLUTION

[0009] A shoe with adjustable foot arch tightness and easy wearing and taking-off, comprising a shoe body, the shoe body comprising a shoe upper body, a tongue, a shoe back, a foot arch tightness adjustment device, and an inner structure, with the following specific design.

[0010] (1) Shoe upper body.

[0011] The breathable knitted fabric is made of 80% combed cotton + 20% spandex blend, with a yarn density of 200 needles / inch, excellent breathability and elasticity: air permeability ≥ 500 mm / s, can quickly discharge the moisture in the shoes; the horizontal tensile rate ≥ 30%, can slightly deform with the shape of the foot, reduce the feeling of restraint when wearing shoes, avoid the foot hot or tight.

[0012] (2) Tongue intelligent support structure.

[0013] Support core design: The inside of the tongue is fixedly embedded with a support along the length direction, which is made of shape memory resin, with a length of 85% of the total length of the tongue and a thickness of 2mm; the support is provided with a hollow area, which can support the tongue and enhance the breathability, avoiding the heat inside the tongue.

[0014] Support forming process: The hollow area divides the support into a main support part and two edge support parts; the main support part is cut in the middle and overlapped by 0.3cm for sewing, so that its length is shorter than the original length; in the natural state, the length of the edge support part remains unchanged due to the shortening of the main support part, and the support spontaneously forms a prestressed curved surface body with the front end up 5mm and the rear end up 3mm, thereby ensuring that the tongue is constantly in an uplift state and eliminating the problem of internal rolling when putting on and taking off.

[0015] Tongue lining optimization: The inner surface of the tongue is compounded with a 1mm thick sponge pad (density 25kg / m³), which completely covers the support, avoiding direct contact between the support and the foot, and improving the comfort of the tongue.

[0016] (3) Heel guiding and locking structure.

[0017] Shell material and forming: A multi-curved heel shell is embedded in the inner side of the shoe back, which is integrally formed by resin through a mold, with a curvature strictly matching the anatomical profile of the human heel bone, a fit degree ≥ 90%, ensuring that the heel and the shell have no gap and shake.

[0018] Guiding and locking function: The upper edge of the heel shell extends a smooth guide part with an inclination angle of 15°, and the lower end of the guide part is provided with a carding foot part protruding inward to the shoe cavity (visible in the side view central section view); when wearing shoes, the guide part guides the heel to slide smoothly, and the carding foot part is engaged with the upper edge of the heel bone after wearing, preventing the shoes from falling off when walking.

[0019] Buffer layer design: The entire inner side of the heel shell is compounded with a 20mm thick, 25kg / m³ density foamed sponge flexible buffer layer, and the buffer layer is covered with a lycra fabric (grammage 180g / m²), which not only disperses the contact pressure of the heel (contact pressure ≤ 20kPa), but also avoids friction between the shell and the skin, reducing the risk of heel wear.

[0020] (4) Instep tightness adjustment device.

[0021] Basic type adjustment strap: 1 piece of 5cm wide adjustment strap made of synthetic leather; one end of the adjustment strap is sewn and fixed to the inner instep of the shoe body, and the other end is detachably connected to the outer instep of the shoe body through a magic tape, and the magic tape is 5cm wide. The adjustment range covers 3-5cm circumference, which is suitable for different swelling degrees of the foot.

[0022] Extended type adjustment strap: composed of 3 independent sub-adjustment straps (each about 2cm wide), a split system, with independent magic tapes at the inner and outer instep ends, and the sub-adjustment straps are fixed at different heights of the shoe body (2cm above the forefoot, middle instep, and rear instep); users can selectively loosen the corresponding sub-adjustment strap according to the specific swelling area of the foot (such as swelling in the middle instep), or completely detach a sub-adjustment strap (such as the ulcer area of the foot), to achieve precise pressure management.

[0023] (5) Comprehensive anti-foot resting lining structure.

[0024] Lining layer composition: the entire shoe cavity inside the shoe body (toe, side, arch, heel, and ankle) is fully covered with a "spandex and cotton blended fabric + foamed sponge" composite lining layer; the spandex content in the blended fabric is 18%, and the cotton content is 82%, which is good for skin and excellent in elasticity; the foamed sponge has a density of 25kg / m³, and has both cushioning and rebounding performance (rebound time 3-5s).

[0025] Beneficial effects.

[0026] Efficiency of putting on and taking off: the tongue support structure maintains an upward state, and cooperates with the heel guide part to make the opening width of the shoe cavity not less than 8cm, so that manual intervention is not needed during the process of putting on and taking off. According to the test of 100 subjects over 65 years old, the average time of putting on and taking off is not more than 2 seconds, which is more than 60% shorter than the traditional structure, and there is no phenomenon of the tongue curling or falling into the shoe.

[0027] Adaptability: the instep adjustment device can achieve 3cm to 5cm of circumference adjustment, supporting local or overall tightness adjustment. According to the test of 50 diabetic patients on the swelling state of the foot in the afternoon, the instep compression of the foot after adjustment is significantly reduced, and the local pressure drop rate is not less than 88%, which improves the wearing stability and comfort compared with the fixed tightness structure.

[0028] Comprehensive comfort protection: the cushioning lining and the heel cushioning layer form double protection, the foot contact pressure is evenly distributed (the maximum contact pressure is ≤20kPa), and the "foot resting" phenomenon is completely eliminated; continuous wearing test for 8 hours shows that the incidence of foot abrasion and tenderness is 0, which is especially suitable for sensitive feet such as diabetic patients.

[0029] High cost performance and mass production: no complex mechanical parts, which can be directly used for large-scale production.

[0030] Multi-scenario adaptation: Breathable knitted vamp and inner breathable design adapt to summer wear; detachable adjustable strap adapts to foot ulcer care, taking into account multiple use scenarios such as daily, pathological, seasonal, etc. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 : Overall structure of the shoe.

[0032] Figure 2 : Structure and process of the tongue support.

[0033] Figure 3 : Side view of the multi-curved heel shell.

[0034] Wherein, vamp main body 1, tongue 2, shoe back 3, instep tightness adjusting device 4, magic tape 5, support 21, hollow area 22, main body support part 23, edge support part 24, overlapping sewing part 25, heel shell 30, guide part 31, and card foot part 32. DETAILED DESCRIPTION Example 1: Heel shell and support cooperate to realize "one foot on and off"

[0035] 1. Parameter setting.

[0036] Tongue support: PEEK resin material, thickness 2mm, length accounts for 85% of the tongue, hollow area accounts for 30%, main body support part overlapping sewing 0.3cm, natural state front and back end upwarp height is 5mm, 3mm respectively.

[0037] Multi-curved heel shell: TPU resin integral molding, guide part inclined 20°, inner side foamed sponge buffer layer 2mm thick (density 25kg / m³), outer cover 180g / m² Lycra fabric.

[0038] Inner layer: 18% spandex + 82% cotton blended fabric, composite 25kg / m³ sponge.

[0039] 2. Putting on and taking off process.

[0040] Putting on shoes: in the user's upright state, the tongue is kept upwarping under the action of the support; the toes are stretched into the shoe cavity, the heel contacts the guide part of the shell, and is lightly stepped down, the guide part is slightly deformed (≤2cm) due to the elasticity of TPU resin, guiding the heel to slide into the shoe cavity along the curved surface; after the heel is completely in place, the card foot part is engaged with the upper edge of the calcaneus, the fixing is completed, and the whole process does not need to manually adjust the tongue or bend down for assistance, which takes about 1 second.

[0041] Taking off shoes: the user steps on the heel of the other foot with one foot, and the shoe is taken off by lifting the foot. The tongue is in an upwarping state under the action of the support, ready for the next time of putting on shoes.

[0042] 3. Effect verification.

[0043] 100 people over 65 years old were selected for testing, 60 of whom had difficulty bending over. 95% of the feedback was that they could put on and take off the shoes independently without the assistance of others, and there was no heel slipping, tongue rolling or foot rubbing. The convenience score for putting on and taking off the shoes (on a scale of 10) averaged 9.2, significantly higher than that of traditional shoes (an average of 5.8). Example 2: Dynamic adjustment of diabetic foot swelling (application of an extended adjustment strap)

[0044] 1. Parameter setting.

[0045] Instep adjustment device: 3 independent 2cm wide sub-adjustment straps made of synthetic leather, with Velcro at the ends of the sub-adjustment straps, and Velcro fixed on the inside and outside of the shoe body, 4cm high and 6cm wide.

[0046] 2. Usage scenarios and operations.

[0047] Morning foot normal state: 3 sub-adjustment straps are fixed at the lowest position (closest to the sole), the adjustment straps fit the instep, the contact pressure is ≤15kPa, there is no compression, and the shoe heel is good (no sliding when walking).

[0048] Afternoon foot swelling (mainly swelling in the middle of the instep): while sitting, the user tears off the Velcro of the upper 2 sub-adjustment straps with one hand, moves the inside and outside ends of each up by 1cm, and reattaches the Velcro to fix it; the lower sub-adjustment strap remains at the lowest position to maintain the overall stability of the shoe; after adjustment, the swelling area of the instep increases by 2cm, the contact pressure decreases to ≤12kPa, the compression disappears, and the blood circulation is normal (there is no significant increase in foot skin temperature).

[0049] Foot ulcer care: if the user has a 0.5cm x 0.5cm ulcer on the lateral side of the instep, the lateral sub-adjustment strap in the corresponding area can be completely removed to avoid friction and further damage; the other 2 sub-adjustment straps remain fixed to ensure normal wear of the shoe.

[0050] 3. Effect verification.

[0051] 50 diabetic patients (all with afternoon foot swelling symptoms, with swelling circumference of 2-4cm) were selected for testing, 88% of whom reported that there was no compression after adjustment and they could wear the shoes continuously throughout the day (more than 8 hours); the foot swelling pain relief rate was 75% higher than that of traditional fixed elastic shoes, and there was no foot numbness or purple phenomenon caused by shoe compression. Example 3: Detachable adjustment strap and inner coordination for summer / serious swelling scenarios

[0052] 1. Parameter setting.

[0053] The instep adjusting device comprises three detachable sub-adjusting belts, and two ends of each sub-adjusting belt are connected with the shoe body through buckles, and the opening and closing force of the buckles is less than or equal to 3N, so that the device is convenient to operate by one hand.

[0054] The inner layer: the instep to the heel area is provided with a breathable mesh cloth (the air permeability is greater than or equal to 800 mm / s), and other parameters are the same as those in example 2.

[0055] 2. Usage scenarios and operations.

[0056] Summer / sports scenarios: the middle sub-adjusting belt is detached, and the inner breathable mesh cloth area forms an air flow channel (the air flow speed is greater than or equal to 0.3 m / s); in a 35 DEG C high-temperature environment, the temperature in the shoe is 4.2 DEG C lower than that in a conventional shoe, and the humidity (relative humidity) in the shoe is 25% lower than that in a conventional shoe, and there is no stuffy feeling.

[0057] Severe swelling of the foot: the user's foot circumference is increased by 5 cm due to diabetic complications, all three sub-adjusting belts are detached, the instep circumference can be increased by 5 cm at most, and the swollen foot can be completely accommodated; the inner sponge always fits the foot, and there is no local suspension or compression, and the foot does not feel pain when walking.

[0058] The above examples are only preferred embodiments of the present application, and are not limiting of the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A shoe with adjustable instep tightness and easy on and off, comprising a shoe body, said shoe body including a main upper, a tongue, a heel counter, and an instep tightness adjustment device, characterized in that: The main body of the shoe upper is made of breathable knitted fabric; A support member is fixedly provided inside the shoe tongue along its length. The support member is made of a material with shape memory properties, so that the upper end of the shoe tongue maintains a natural upward tilt. The inner side of the heel counter is provided with a multi-curved heel guard, the shape of which is adapted to the anatomical contour of the human heel, and the upper edge of the guard is provided with a guide part to allow the heel to slide into the shoe cavity. The instep tension adjustment device is equipped with a horizontally arranged adjustment strap, the left and right ends of which are connected to the shoe body respectively.

2. The adjustable instep tightness and easy-to-wear shoe according to claim 1, characterized in that: The support is made of resin.

3. The adjustable instep tightness and easy-to-wear shoe according to claim 2, characterized in that: The support member has a breathable and compressible hollow area.

4. The shoe with adjustable instep tightness and easy on / off as described in claim 2, characterized in that: The support component is divided into a main support part and two edge support parts by a hollow area; The main support part is made by cutting the middle part and then stitching it together. Its length is different from the length when it was not cut. When the support part is pulled, the length of the two edge support parts remains unchanged, so that the support part forms a curved body with the front and rear ends curving upward.

5. The shoe with adjustable instep tightness and easy on / off as described in claim 1, characterized in that: The multi-curved heel cover is integrally molded from resin using a mold.

6. The shoe with adjustable instep tightness and easy on / off as described in claim 5, characterized in that: The inner side of the multi-curved heel cover is also equipped with a flexible cushioning layer, which is made of foamed sponge.

7. The shoe with adjustable instep tightness and easy on / off as described in claim 5, characterized in that: The lower end of the guide portion of the multi-curved heel cover is connected to a locking foot portion; In the side view of the central cross-section, the foot-clamping part protrudes more from the shoe cavity direction than other parts of the multi-curved heel shell, thus securing the heel during normal wear and preventing it from slipping off.

8. The shoe with adjustable instep tightness and easy on / off as described in claim 1, characterized in that: The width of the adjustment strap is 4 cm to 6 cm, and the outer connector is Velcro.

9. A shoe with adjustable instep tightness and easy on / off as described in claim 8, characterized in that: The length of the support component accounts for more than 80% of the total length of the shoe tongue, and its thickness is 1.5 mm to 5 mm.

10. The shoe with adjustable instep tightness and easy on / off as described in claim 1, characterized in that: The adjustment belt is composed of several sub-adjustment belts; The sub-adjustment belt is detachable and its position can be adjusted.

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