Functional auxiliary shoe

Abstract

The invention discloses a functional auxiliary shoe, and aims to solve the problems of wearing and taking-off difficulty and falling risk of groups with limited limb movement, abnormal gaits or balance dysfunction. The auxiliary shoe is composed of a vamp system and a sole system in a cooperative mode, the vamp system is convenient to put on and take off and stably attached through a built-in heel cup, the heel cup is sequentially provided with an upper portion, an arch transition portion and a lower portion from a shoe opening to the inside, and in a side view, the arch transition portion at least partially protrudes out of the front portion, so that the heel is guided to smoothly slide in; the heels are clamped to prevent falling off when the shoes are worn; the shoe sole system adopts differential friction design, the first friction coefficient of the half sole area is smaller than the second friction coefficient of the heel area, the half sole low resistance reduces stepping jamming, the heel high resistance enhances the ground gripping stability, and the high resistance area extends to the outer side wall of the heel to prevent lateral slipping. Organic unification of wearing and taking-off convenience, walking stability and anti-skid safety is achieved, and the anti-skid shoe is suitable for wide groups such as old people, patients with nervous system diseases and patients with osteoarticular diseases.

Description

Technical Field

[0001] The present invention relates to the field of shoemaking technology, specifically to the intersection of rehabilitation assistive devices and aging-friendly products. It aims to provide a functional assistive shoe that is easy to put on and take off, adapts to gait and has anti-slip functions. It is suitable for groups with limited limb movement, abnormal gait or balance dysfunction, including the elderly, Parkinson's patients, stroke sequelae patients, arthritis patients and other people who need special foot care and support. Background Art

[0002] In daily life, people with limited limb mobility or balance impairments often face a dual challenge: First, putting on and taking off shoes becomes a challenge. Elderly people with difficulty bending over, and those with neurological diseases who experience reduced manual dexterity, struggle to lift and adjust their feet, often requiring traditional shoes. This can lead to falls due to imbalance. While some hands-free shoes simplify donning and donning, their lack of fit can lead to frequent heel fall-off during walking, increasing safety risks. Second, there's a conflict between slip resistance and gait adaptation during walking. Excessive frictional resistance in the forefoot during stride can easily lead to stuttering and falling, such as the "panicked gait" of Parkinson's disease patients. Inadequate heel grip during landing can lead to backward or sideways slipping during standing or starting, as is the case with elderly people whose balance ability deteriorates. Existing footwear often uses a single friction coefficient design, failing to balance "flexible walking" with "stable grip." Furthermore, it lacks lateral anti-slip protection, increasing the risk of lateral falls. Therefore, there is an urgent need for functional assistive footwear that integrates "easy donning and donning, stable fit, and differentiated anti-slip properties." Summary of the Invention

[0003] The core of this invention lies in the collaborative design of the upper system and the sole system to build a complete functional system of "easy to put on and take off - fit and prevent slipping - gait adaptation - anti-slip and stable", providing a safe and comfortable wearing solution for a wide range of people.

[0004] Innovation in the upper system focuses on the structural design of the heel cup.

[0005] The heel cup is integrated into the back support assembly on the inner side of the back of the shoe, and forms an upper part, an arched transition part and a lower part in sequence from the shoe opening inward.

[0006] The top of the upper portion is inclined upward and backward away from the back of the shoe, forming a smooth slope of 15° to 45°. When the user places the heel against this position, the shoe can slide naturally along the inclined surface without the help of the hands, which greatly reduces the difficulty of putting on and taking off the shoe. It is especially suitable for people with limited bending or unilateral limb weakness.

[0007] The upper part and the lower part are smoothly connected by an arched transition part, which at least partially protrudes forward in the contour line of the upper part and the lower part in a side view. This "forward convex" structure is crucial - when putting on the shoes, the heel slides into the shoe cavity area through the arched transition part; in the wearing state, the arched transition part clamps the recess on the upper side of the heel, forming a "buckle" like anti -slip effect, avoiding falling off when walking or exercising.

[0008] The lower part adopts a hemispherical structure that fits the calcaneus of the heel, and the inner wall curvature matches the human calcaneus curve, providing stable support and dispersing pressure through large-area contact to improve long-term wear comfort.

[0009] To enhance the overall stability of the shoe body, the lower end of the lower part also extends several fixed structures, which are firmly connected to the sole after bending, limiting the displacement of the heel cup in the up-down and left-right directions, ensuring long-term reliability of the structure.

[0010] The sole surface of the sole system includes a forefoot area and a heel area, which are designed to adapt to the gait requirements through differential friction.

[0011] The forefoot area covers the toe to the metatarsal head area, has a first friction coefficient, and its surface is a low-resistance smooth area with a friction coefficient controlled at a low level (≤0.3), a surface roughness Ra≤1.6μm, and a shallow texture with a depth of ≤0.3mm. It can reduce the ground resistance when walking, avoid the "foot stuck" feeling, adapt to small step forward, drag and other abnormal gait, and also retain basic anti-slip ability.

[0012] The heel area covers the calcaneus area and has a second friction coefficient, which is higher than the first friction coefficient (≥0.65), which is realized by a deep-textured anti-slip sheet made of high-elastic resin and / or wear-resistant material, with a groove depth of ≥1.0mm and a contact area of more than 60% of the heel area. It provides strong grip in standing, starting or stopping moments; more importantly, the anti-slip sheet extends to the lateral wall of the heel to form a 2~8mm high wall structure, effectively resisting lateral force and significantly reducing the risk of lateral slipping when the body is inclined.

[0013] This coordinated design of the upper and the sole makes the auxiliary shoes not only easy to put on and take off for people with limited limb movement, but also ensures walking safety through close fitting and differential anti-slip, covering daily wear, rehabilitation training, home care and other scenes. Advantages

[0014] The advantages of the present application are embodied in the dual breakthroughs of function synergy and population adaptation: the inclined guiding design of the heel cup shortens the putting on and taking off time to 1-2 seconds without the need for hand assistance, solving the problem of putting on shoes for people with difficulty in bending over and hand dysfunction; the "clamping and anti-falling" feature of the arch-shaped transition part reduces the falling rate by more than 90% compared to traditional hands-free shoes, improving walking stability. The differential friction design of the sole reduces the abnormal gait by 65% and the risk of slipping by 70%, taking into account "flexible stepping" and "stable grip". At the same time, the overall structure enhances stability through fixed structures, and the material selection takes into account elasticity and wear resistance, with a service life of 1.5-2 years for single and double shoes, suitable for a wide range of populations such as the elderly, patients with nervous system diseases, and patients with bone and joint diseases, meeting the market demand for rehabilitation aids and aging products. It has significant practical value and broad application prospects. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor under the premise of not paying the creative labor: Figure 1 A side view of a functional auxiliary shoe provided by the embodiment of the present application; Figure 2 A perspective view of a heel cup provided by the embodiment of the present application; Figure 3 A side view of a heel cup provided by the embodiment of the present application, and the dashed line in the figure is a vertical line; Figure 4 A plan view of the sole system bottom provided by the embodiment of the present application.

[0016] In the figure, 10 is a functional auxiliary shoe, 20 is a shoe upper system, 30 is a sole system, 31 is a forefoot region, 32 is a heel region, 100 is a heel cup, 101 is an upper part, 102 is an arch-shaped transition part, 103 is a lower part, and 104 is a fixed structure. DETAILED DESCRIPTION

[0017] Embodiment one, taking a daily shoe suitable for the elderly population as an example, as shown in Figure 1 The shoe upper system 20 of a functional auxiliary shoe 10, the shoe upper material adopts a knitted fabric with elasticity and ventilation, the heel cup 100 is like Figure 2As shown, from the shoe opening inward, the upper portion 101, the arched transition portion 102, the lower portion 103 and the fixing structure 104 are formed in sequence. The top of the upper portion 101 is tilted upward and backward away from the shoe upper, and the lower portion 103 is a hemispherical structure that fits the heel bone. The intersection of the lower end of the upper portion 101 and the extension line of the lower end of the lower portion 103 is smoothly transitioned to form the arched transition portion 102. The arched transition portion 102 is as shown in FIG. Figure 3 As shown, relative to the upper portion 101 and the lower portion 103 , at least a portion protrudes further forward.

[0018] The heel cup 100 is integrally molded from TPU material with a Shore A hardness of 85. The upper part 101 is tilted at a 30° angle, the arched transition part 102 protrudes forward 5mm, and the lower part 103 has a hemispherical structure with a curvature radius of 38mm, which is suitable for the calcaneal morphology of most elderly people; the fixing structure 104 consists of five extension pieces with a width of 8mm, which are bonded to the sole after bending, with a bonding strength of 2.0MPa.

[0019] like Figure 4 As shown, in the sole system 30, the forefoot area 31 has a surface roughness of Ra = 1.2μm, a shallow texture interval of 2.5mm, and a primary friction coefficient of 0.28. The anti-slip patch in the heel area 32 features a cross-grid pattern with a depth of 1.2mm, a secondary friction coefficient of 0.70, and an outer wall height of 5mm. After a three-month trial with 100 elderly people aged 65 and over, the average donning and doffing time was 1.5 seconds, with no slipping or falling during walking. 95% of the respondents reported that the shoes were comfortable and not uncomfortable.

[0020] Example 2, a rehabilitation model for stroke patients, incorporates the above modifications: the angle of the upper portion 101 of the heel cup 100 is increased to 40°, making it easier for those exerting force on one side; the primary coefficient of friction in the forefoot area 31 is reduced to 0.25, reducing drag during gait; and the height of the heel area 32, which wraps around the wall, is increased to 8mm, enhancing lateral stability. Clinical trials have shown that the success rate of single-leg donning and doffing has increased from 25% to 92%, and stuttering during gait training has been reduced by 70%.

[0021] Example three, taking Parkinson's disease patients as an example. The heel cup 100 is integrally injection molded with TPU material with a Shore A hardness of 90, which is suitable for the characteristics of the feet of Parkinson's patients. The upper part 101 has an inclination angle of 30°, forming a smooth guide slope, which facilitates the patient to slide into the shoe along the slope only by foot force when the patient cannot assist in lifting the shoe due to hand tremor; the arched transition part 102 protrudes forward by 4mm, and the protruding area in the side view accurately corresponds to the recessed area below the heel tendon, which can tightly tighten the heel when worn, avoiding the heel from falling off when the patient takes small steps and rushes forward quickly in "frightened gait". The lower part 103 is a hemispherical structure with a curvature radius of 36mm, which fits the calcaneus shape of Parkinson's patients, disperses the pressure when walking, and reduces local friction damage caused by unstable gait; the lower end of the lower part 103 extends 4 fixed structures 104 with a width of 8mm, which has a bonding strength of 2.2MPa after bending, enhancing the structural stability of the upper system 20 and the sole system 30, preventing the heel cup 100 from shifting left and right when walking. The rear support assembly is filled with 1.8mm thick PU foam sponge, covering the edge area of the heel cup 100, reducing the discomfort of foot friction with hard structure caused by tremor.

[0022] In this embodiment, the forefoot area 31 accounts for 50% of the total length of the sole, with a surface roughness Ra=1.0μm and shallow fine lines with a spacing of 2mm, and the first friction coefficient is controlled at 0.25 (dry condition), which reduces the ground jamming when the forefoot steps in "frightened gait" through low resistance design, adapting to the gait requirements of small steps and quick forward rush; the heel area 32 accounts for 30% of the total length of the sole, and the anti-slip sheet made of rubber with a Shore A hardness of 65, the surface is a sawtooth pattern with a depth of 1.5mm, the second friction coefficient reaches 0.75 (dry condition), ensuring the grip force in the instant of starting and stopping; the anti-slip sheet extends to the lateral wall of the heel to form a 7mm high wall structure, enhancing the lateral stability and reducing the risk of lateral slipping caused by body imbalance.

[0023] Actual effect: 20 Parkinson's patients (Hoehn-Yahr stage 2-3) tried for 2 months, with an average of 1.2 seconds to put on and take off, and they could complete the putting on and taking off independently without the assistance of family members; the jamming sensation score of "frightened gait" during walking decreased by 72%, and no falling incidents occurred in the 30-meter walking test; 90% of the patients feedback that the heel fit was stable and there was no falling off phenomenon, and the discomfort of foot compression was significantly reduced.

[0024] The above examples are only preferred modes, and any modifications, material replacements or structural adjustments within the principles of the present application shall be included in the protection scope.

Claims

1. A functional auxiliary shoe, characterized by: Including upper system and sole system; The upper system includes a shoe back, and a back support assembly is provided on the inner side of the shoe back; The back support assembly has a built-in heel cup; The heel cup is provided with an upper portion, an arched transition portion, and a lower portion in sequence from the shoe opening inward; The top of the upper portion is inclined upward and backward away from the shoe back; The lower part is a hemispherical structure that fits the heel bone; The intersection of the lower end of the upper portion and the extension line of the lower end of the lower portion is smoothly transitioned to form an arched transition portion; In a side view, at least a portion of the arched transition portion protrudes further forward relative to the upper portion and the lower portion; The sole system includes a forefoot area and a heel area; The forefoot region has a first coefficient of friction; The heel region has a second coefficient of friction; The first friction coefficient is smaller than the second friction coefficient.

2. The functional assistive shoe according to claim 1, characterized in that: When the user wears the shoe, the heel slides along the inclined surface of the upper portion, through the arched transition portion, and into the lower area. Complete the shoe-putting action; When the shoe is worn, the arched transition portion holds the heel, preventing it from falling off easily.

3. The functional assistive shoe according to claim 1, characterized in that: A plurality of fixing structures extend downwardly from the lower end of the lower portion of the heel cup; The fixing structure enhances the structural stability of the upper system and the sole system in the shoe form.

4. The functional assistive shoe according to claim 1, characterized in that: The forefoot area includes a low-resistance smooth area to reduce the feeling of stuttering when walking.

5. The functional assistive shoe according to claim 1, characterized in that: The heel area includes a high-resistance anti-slip area; The high-resistance anti-slip area extends to the outer side wall of the heel to prevent lateral slipping.

Images