Elastic supporting piece and shoes thereof

Abstract

The invention designs a pair of shoes with elastic shoe stretchers by combining stress concentration and dispersion principles. The key point of the invention is that the rear upper of the shoe or the rear upper belt of the sandal is provided with an elastic supporting piece, so that the shoe can be easily worn without the help of hand assistance. And meanwhile, the welt of the shoe is restored to a normal state after the shoe is put into the foot according to the principles of stress dispersion and elastic force restoration, so that the attractiveness of the shoe is ensured. According to the innovative design and manufacturing process, the production cost of the shoes is reduced, the use experience is optimized, the wearing convenience and practicability of the shoes are improved, meanwhile, the comfort and stability are ensured, and the defects in the prior art are overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of shoe manufacturing, and particularly to a hands-free shoe that can be easily worn without the assistance of hands. Specifically, the elastic support member structure combines the principles of stress concentration and dispersion to achieve the convenience and stability of shoe wearing. This technology is applicable to various types of shoes, especially easy-to-wear shoe products such as sports shoes and casual shoes. Background Art

[0002] Utility model patent application No. CN202321904385.5 discloses a shoe strap with a rigid convex curved portion and an L-shaped anchor to improve the comfort and convenience of putting on and taking off shoes. This technology requires the shoe strap to have a specific three-dimensional supporting force shape, which needs to be injection molded with a specific mold, and this three-dimensional structure is not convenient for sewing operations during the shoe-making process.

[0003] Therefore, there is an urgent need for a technical solution that can reduce mold costs and facilitate actual shoe-making operations, realizing the function of wearing shoes without the need to lift by hand, so as to better meet market demands. Summary of the Invention

[0004] The purpose of the present invention is to enable easy wearing of shoes without the assistance of hands by combining an elastic support member based on the principle of stress concentration.

[0005] The present invention also aims to reduce the production cost of shoes through innovative design and manufacturing processes, optimize the user experience, increase the convenience and practicality of shoe wearing, while ensuring comfort and stability, and overcoming the deficiencies in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solution: An elastic support member, characterized in that: it has a first form and a second form.

[0007] According to some embodiments of the present invention, the elastic support member is a sheet-shaped planar body made of resin material through a flat mold, set as the first form, which is the initial planar state. The elastic support member is a planar horseshoe shape when not under force, and each part is relatively flat. The central part of the horseshoe shape is set as the pressure-bearing part, and the two ends of the opening part of the horseshoe shape are set as the fixing parts. The part connecting the pressure-bearing part and the two fixing parts is the support part. In terms of width, the pressure-bearing part is the narrowest, the support part is slightly wider, and the fixing part is the widest. In the first form, all parts of the elastic support member are on the same plane, and the whole presents a relatively regular shape. From the appearance, there is no obvious three-dimensional sense.

[0008] Preferably, the second form is installed on the shoe and is in a three-dimensional form. Specifically, the bottom edges of the two fixing parts are parallel and pulled apart to separate them, and the elastic support member begins to change its shape. The narrowest pressure-bearing part will sink downward under the action of stress, forming an inclined curved surface. The inclination degree of this curved surface depends on the magnitude and direction of the stress, as well as the elastic characteristics of the material. At the same time, the support part will be distorted as the pressure-bearing part deforms, forming an inclined three-dimensional structure. At this time, the elastic support member is a complex curved surface structure with a specific shape and function.

[0009] Preferably, the pressure-bearing part is the narrowest in width, and after being subjected to pressure, its degree of deformation is relatively large. When changing from the planar state to the three-dimensional state, the pressure-bearing part rotates backward the most severely, forming an inclined shape. This inclined shape provides a guiding effect for the heel, enabling the heel to slide into the shoe more smoothly. At the same time, the inclination of the pressure-bearing part also helps to disperse stress, transferring a part of the stress to the support part and the fixing part. The pressure-bearing part is located at the bottom of the heel tendon of the heel and is concave facing the foot. The upper part of its concave surface is inclined backward, forming an inclined surface in the direction of the shoe interior. When viewed from the side, this inclined surface is linear.

[0010] Preferably, the width of the support part is between that of the pressure-bearing part and the fixing part. During the process of changing from the planar state to the three-dimensional state, the support part is distorted backward and downward as the pressure-bearing part deforms. Due to its relatively large width, the degree of distortion of the support part is relatively small, but it still plays an important role in connecting the pressure-bearing part and the fixing part. The distortion of the support part provides a certain elasticity and stability for the entire elastic support member. It can bear a part of the pressure from the pressure-bearing part and transfer it to the fixing part. At the same time, when the heel leaves, the support part can help the elastic support member return to the initial three-dimensional state.

[0011] Preferably, the inclination amplitude of the pressure-bearing part is adjusted by the shape of the elastic shoe support. The shape of the first form of the elastic support member can be appropriately adjusted according to different shoe styles and wearing scenarios, as well as the inclination amplitude of different rear straps. Different shapes, widths, and angles result in the second form of the elastic support member including, but not limited to, different inclination angles and lateral widths of the pressure-bearing part. It requires practitioners in this industry to continuously design and test to obtain an ideal shape. The inclination amplitude of the pressure-bearing part is adjusted by the arc degree of the elastic shoe support. The larger the arc degree of the first form, the larger the inclination amplitude of the pressure-bearing part in the second form.

[0012] Preferably, the elastic support member is made of a material with support force and elastic characteristics. In the second form, when the external force exceeds its support strength, the elastic support member will deform, and when the external force is less than its support strength, the elastic support member will return to its original shape.

[0013] Preferably, the elastic support member further includes two fixing parts. The fixing part has the widest width, and its main function is to firmly fix the elastic support member on both sides of the rear strap. During the process of the plane becoming three-dimensional, the shape of the fixing part changes relatively little, but it needs to bear the tensile force and torsional force from the support part and the pressure-bearing part. The larger width of the fixing part enables it to better fix with the vamp, ensuring the stability and reliability of the elastic support member during use.

[0014] According to some embodiments of the present invention, the fixing part can be fixed to the vamp part of the shoe by sewing.

[0015] According to some other embodiments of the present invention, the fixing part can also be bent inward and fixed to the sole part between the insole and the outsole of the shoe when pulling the vamp.

[0016] Preferably, whether the fixing part is fixed by sewing or gluing, after the upper is shaped by last fitting, the second form can be obtained.

[0017] Preferably, the elastic support member corresponds to each part of the shoe upper respectively. Among them, the pressure-bearing part corresponds to the upper end part of the rear strap, and the support part corresponds to the inner and outer waists of the rear strap.

[0018] Preferably, the application of stress concentration and dispersion is fully reflected in this improved technology, especially in the design of the elastic support member. Stress concentration and dispersion enable the shoe support member to provide dynamic response under the action of stress. Through its specific inclination and deformation, it can not only facilitate the wearer to quickly put on the shoes, but also quickly return to its shape after wearing, ensuring the stability and comfort of the shoes. This structural design not only has significant advantages in realizing the hands-free function, but also reflects the novelty and creativity of the present invention in the field of shoemaking technology.

[0019] Preferably, by adjusting the widths of the pressure-bearing part, the support part and their connecting parts of the elastic support member, the width in the left-right direction of the inclined plane of the pressure-bearing part in the second form can be effectively adjusted. The wider the pressure-bearing part, the wider the width in the left-right direction of the inclined plane of the pressure-bearing part in the second form.

[0020] According to some other embodiments of the present invention, when making sandals, the elastic support member is installed inside or outside the rear strap of the sandal, and a good hands-free effect can also be achieved.

[0021] Preferably, the elastic support has fine textures on its surface, which can increase the friction with other shoe materials and improve the stability of the elastic support. It also increases the adhesion of glue. When the elastic support is assembled on the surface of the shoe back or back strap, these textures including but not limited to hollow, stripes, dots, stone patterns, checkered patterns, etc. can also increase the aesthetics.

[0022] According to some embodiments of the present invention, the fixing portion is designed to be slightly triangular so as to be more stable.

[0023] When the front end of a human foot is inserted into the shoe and the heel is stepped down, the pressure-bearing portion of the elastic shoe support is bent backward and downward by the downward stepping force, thereby increasing the foot-entry diameter of the shoe opening, so that the heel slides into the shoe cavity along the inclined surface of the pressure-bearing portion. At the moment the heel enters the shoe cavity, the support portion quickly returns to its original shape, and the shoe back also returns to its original shape at the same time, locking the heel and preventing the heel from falling off easily.

[0024] Preferably, the design of the entire hands-free shoe fully considers ergonomics to ensure that the elastic shoe stretcher can provide the wearer with the best wearing and taking-off experience. In particular, the design at the heel makes it possible to put on the shoe without the need for additional auxiliary tools, and the heel can smoothly enter the shoe cavity and be firmly stuck, avoiding the problem of unstable heel sliding during the wearing and taking-off process, and also solving the problem of the tongue being rolled into or curled up in the shoe cavity. Beneficial Effects

[0025] Compared with the prior art, the present invention has the following beneficial effects.

[0026] Easy to put on and take off: The elastic shoe support of the present invention uses the principle of stress concentration to make the process of putting on and taking off shoes more convenient. The wearer can easily slide the heel into the shoe cavity without the help of hands. It is suitable for users of different ages and physical conditions, and is of great significance especially for people with mobility difficulties.

[0027] Comfortable and stable: The dynamic deformation design of the elastic shoe tree not only improves the convenience of putting on shoes, but also ensures that the heel can be firmly fixed after putting on shoes.

[0028] Reduced production costs: The use of flat molds reduces the cost of three-dimensional molds. At the same time, the flat elastic shoe tree is more convenient to operate during the upper making operation, thus effectively reducing the production cost of shoes.

[0029] Diversified appearance design: The hands-free shoes of the present invention can be diversified in appearance design according to different styles and market demands, and are suitable for the aesthetic needs of different age groups and consumer groups. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1A side view of a shoe with an elastic shoe tree provided in an embodiment of the present invention.

[0031] Figure 2 A schematic diagram of a first form of an elastic shoe tree provided by an embodiment of the present invention.

[0032] Figure 3 A side view of a second form of an elastic shoe tree provided by an embodiment of the present invention.

[0033] Figure 4 A three-dimensional diagram of a second form of an elastic shoe tree provided by an embodiment of the present invention.

[0034] Figure 5 A schematic diagram of the deformation of the support portion of a second form of an elastic support member provided by an embodiment of the present invention when subjected to a pedal force.

[0035] Figure 6 A side view of a sandal with an elastic shoe tree provided in an embodiment of the present invention.

[0036] In the figure: shoe 1, shoe opening 10, shoe front upper 11, shoe back upper 12, shoe middle upper 13, shoe foot 14, shoe tongue 15, elastic support member 1340, pressure-bearing part 1341, support part 1342, and fixing part 1343. DETAILED DESCRIPTION

[0037] The embodiments described in the embodiments of the present invention are only some embodiments of the present invention, not all embodiments. 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.

[0038] Combine the following Figure 1 - Figure 6 The embodiments of the present invention are described. Figure 1 The embodiment of the present invention provides a shoe with an elastic shoe tree, comprising an upper portion 2 consisting of a shoe opening 10, a shoe midsole 13 inside and outside the shoe opening 10, a shoe front 11 before the shoe opening 10, and a shoe rear 12 after the shoe opening 10, an insole portion 20, a midsole 30, and a shoe bottom 40. The shoe rear 12 is composed of an upper material and a filling material, and an elastic support member 1340 sandwiched therebetween.

[0039] Specifically, the elastic support member 1340 is a sheet-like plane body made of a resin material, which is set to a first form. A horseshoe-shaped blank is made by injection molding or cutting, see Figure 2。The elastic support member 1340 is made of a resin material, which generally has a certain elasticity and plasticity, providing a basis for forming a three-dimensional shape. This material can withstand external force deformation to a certain extent and can recover a certain shape after the external force is removed, providing the necessary elastic support force for the support member. The present invention can be realized only by simple blanking with a punching knife, reflecting the novelty and creativity of this improved technology in the field of hands-free shoes. Of course, the blanking method can also be knife cutting, laser cutting, etc., which can be changed according to the specific equipment situation, and it is advisable to have a smooth cut surface without burrs. For those with three-dimensional requirements for the elastic support member 1340, such as avoiding the R corner that presses the foot or having different thickness requirements for each part, it can be formed by mold injection.

[0040] Specifically, the shape of the first form of the elastic support member 1340 can be appropriately adjusted according to various styles, wearing scenarios, and the inclination amplitude of the pressure-bearing part 1341. Different shapes, widths, and angles result in the second form of the elastic support member including, but not limited to, different inclination angles and lateral widths of the pressure-bearing part 1341, and it requires the laborious creation of practitioners in this industry to obtain an ideal shape. The width of the pressure-bearing part 1341 is narrower than that of the support part 1342.

[0041] Specifically, the two ends of the elastic support member 1340, that is, the fixing parts 1343, are fixed to the vamp part 14 of the shoe upper 10 by sewing or gluing. After last shaping, the second form, that is, the three-dimensional form, is obtained. When the fixing parts 1343 of the elastic support member 1340 are fixed to the vamp part of the shoe upper, connection stresses will be generated, and these stresses are transmitted to other parts of the elastic support member 1340 through the fixing parts 1343, especially the support part 1342 and the pressure-bearing part 1341. This stress transmission prompts the elastic support member 1340 to gradually change from a planar form to a three-dimensional form, and the shape and angle of each part gradually meet the design requirements. The action of the stress enables the parts to coordinate with each other and reach a stress balance state.

[0042] Specifically, stress concentration refers to the phenomenon that the stress increases significantly in the local area where the shape of an object changes sharply, such as near holes, notches, grooves, weak links, etc. When the geometric shape of an object changes suddenly, uneven stress distribution will be caused at the change. The greater the degree of mutation, the greater the stress concentration coefficient. The present invention utilizes this principle. Refer to Figures 3-4 , the upper part of the elastic support member 1340 is twisted and inclined backward according to the stress concentration principle to form the pressure-bearing part 1341. The lower part of the elastic support member 1340 is the fixing part 1343 fixed to the vamp part 14 of the shoe upper 10, and there is a support part 1342 between the pressure-bearing part 1341 and the fixing part 1343.

[0043] Specifically, the elastic support member 1340 corresponds to each part of the rear shoe upper 12. Among them, the pressure-bearing part 1341 corresponds to the upper part of the rear shoe upper strap, the support part 1342 corresponds to the middle shoe upper 13 and the rear shoe upper 12, and the fixing part 1343 corresponds to the vamp edge of the middle shoe upper 13.

[0044] In this embodiment, referring to Figure 3 , the pressure-bearing part 1341 is the support body of the upper part of the rear shoe upper strap, that is, there is also an inclined surface that slopes backward at the top of the rear shoe upper 12, expanding the foot entry diameter of the shoe mouth 10 of the shoe 1. It is advisable that the length ratio of the front shoe upper 11 to the heel-to-toe direction of the shoe mouth 10 after the shoe mouth 10 is expanded is 2:3. When the heel touches the pressure-bearing part 1341, the pressure will be dispersed along the inclined surface to the support part 1342, causing the support part 1342 to bend and deform backward and downward, thereby further expanding the foot entry diameter of the shoe mouth and allowing the heel to slide into the shoe cavity. This embodiment proves that increasing the shoe mouth 10 is an effective solution to the problem of easy foot entry.

[0045] In this embodiment, referring to Figure 3 , the pressure-bearing part 1341 is located at the bottom of the heel tendon of the heel, in the shape of an arc V-shaped concave with a wider front and a narrower rear facing the foot, and the surface slopes backward according to the principle of stress concentration, forming an inclined surface in the direction of the shoe interior. The side view of this inclined surface is a straight line that slopes backward. The pressure-bearing part 1341 is the support body of the upper part of the rear shoe upper 12, that is, the middle of the upper part of the rear shoe upper 12 is low and the outer edge is high. This design inspiration comes from the flat and concave shape of the bottom of the heel, aiming to imitate the shape and size of the heel part, so that the upper part of the rear shoe upper 12 can better bear the pressure of the heel, better support the heel, provide good stability, and provide a comfortable wearing experience. And the side view shows an inclined surface in the direction of the shoe interior. The purpose of this feature is to allow the heel to slide into the shoe cavity along the upper part of the rear shoe upper 12. When the foot steps on the upper part of the rear shoe upper 12, there will be no obvious feeling of pinching the foot. This design helps to improve the wearing comfort, reduce the discomfort to the foot, and at the same time the heel can smoothly slide into the shoe cavity.

[0046] In this embodiment, referring to Figure 3 , Figure 4 , the lower part of the elastic support member 1340 is the fixing part 1343. The fixing part 1343 is an integral part of the elastic support member 1340. When the fixing part 1343 is fixed to the vamp edge of the shoe upper part 10, the function of the fixing part is not only to fix the support member on the shoe body, but also to transfer the pressure received to other parts of the shoe body through the connection with the shoe upper part 10 and the shoe bottom 40, further dispersing the stress. This effectively strengthens the elastic support member 1340 and the entire shoe body structure. This design not only improves the durability and stability of the shoe, but also helps to extend the service life of the shoe.

[0047] In this embodiment, see Figure 3 , Figure 4 The pressure-bearing portion 1341 uses the principle of stress concentration to form an inclined surface at the upper end of the shoe upper 12 toward the inside of the shoe. The main function of the design is to enable the heel to smoothly enter the shoe cavity during the shoe wearing process, thereby increasing the wearing comfort and convenience. Through this design, the heel can smoothly slide into the inside of the shoe, avoiding friction or obstruction with the shoe upper 12, and improving the smoothness and comfort of shoe wearing.

[0048] The application of the stress concentration principle is fully reflected in the improved technology, especially in the design of the elastic shoe stretcher. The stress concentration principle enables the shoe stretcher to provide dynamic response under stress. Through its specific inclination and deformation, it can not only facilitate the wearer to put on the shoes quickly, but also quickly restore the shape after putting on, ensuring the stability and comfort of the shoes. This structural design not only has significant advantages in realizing the flash-through function, but also reflects the novelty and creativity of the present invention in the field of shoemaking technology.

[0049] In this embodiment, the upper part of the support part 1342 is respectively connected to the two ends of the pressure-bearing part. When the shoes are worn normally, the support parts 1342 on both sides of the heel can better fix the heel during wearing, thereby improving wearing comfort and stability, and reducing the possibility of heel displacement.

[0050] In this embodiment, the elastic support member 1340 is made of a resin material with good support and resilience. In the selection of resin materials, it is recommended to use materials such as TPU (polyurethane), TPE (thermoplastic elastomer) or TPEE (thermoplastic polyester elastomer). These materials have good elasticity and toughness, can provide sufficient support, and have the advantages of wear resistance, durability, and high temperature resistance. Therefore, the elastic shoe stretcher made of these high-elasticity new materials can effectively meet the structural requirements of the shoes while ensuring wearing comfort and durability. Among them, TPU has excellent elasticity and can deform quickly after being subjected to force, such as Figure 5As shown, it can quickly return to its original state after the pressure disappears. This property is crucial for the elastic support member 1340. When the heel steps on the pressure-bearing part 1341, the TPU material can cause the pressure-bearing part 1341 to sink downward and form an inclined surface, and at the same time, the support part can also bend backward and downward accordingly. After the foot leaves, the elasticity of the TPU can help the elastic support member 1340 quickly return to the initial flat state, preparing for the next use. This good elasticity enables the elastic support member 1340 to adapt to different foot shapes and pressures, providing stable support and a comfortable wearing experience. The elastic support member 1340 needs to withstand a certain amount of pressure and tensile force during daily use, so the strength and toughness of the material are key factors. TPU also has high strength and toughness, and can resist the action of external forces without being easily damaged or broken. At the fixing part 1343, the TPU can withstand the tensile force and torsion force from the support part 1342 and the pressure-bearing part 1341, ensuring that the elastic support member 1340 is firmly fixed on both sides of the shoe heel 12. At the same time, at the support part 1342 and the pressure-bearing part 1341, the strength and toughness of the TPU can ensure that the elastic support member 1340 will not be overly deformed or lose its structural stability during the process of being deformed by force.

[0051] In this embodiment, for the elastic support member 1340, when the external force exceeds its support strength, refer to Figure 5 , the elastic support member 1340 will deform and bend backward. When the external force is less than its support strength, the elastic support member 1340 will recover and maintain its original shape. The elastic support member 1340 is the support body of the shoe heel 12. When the upper end of the shoe heel 12 is stepped on by the heel with force, the internal support part 1342 will be stressed and bend backward and deform. This deformation enables the heel to slide down along the pressure-bearing part 1341, easily pass through the shoe opening 10, and then smoothly slide into the shoe cavity to complete the shoe-wearing action. After the heel slides into the shoe cavity, the expansion force acting on the support part 1342 will disappear instantly, and at the same time, the support part 1342 will instantly return to its original shape due to the resilience and narrow the shoe opening 10. The V-shaped arc with a wider front and a narrower rear formed by the two support parts 1342 and the pressure-bearing part 1341 can hold the bottom part of the Achilles tendon of the foot so that it is not easy to fall off. This structural design not only ensures the wearing comfort of the shoes but also enhances the fixing property of the shoe heel 12, bringing a better user experience to the wearer.

[0052] In this embodiment, the elastic support member 1340 can effectively change the inclination angle of the pressure-bearing part 1341 by adjusting the width, angle and other shapes of the pressure-bearing part 1341, the support part 1342 and their connecting parts, so as to meet the needs of various styles and wearing scenarios. This flexible application of the stress concentration principle enables the shoe support member to provide dynamic response under the action of stress. Through its specific inclination and deformation methods, it is very difficult for practitioners in this field to think of by experience and simple labor. Therefore, it has remarkable non-obviousness.

[0053] In this embodiment, a central positioning mark aligned with the center of the back part 12 of the shoe can be marked on the elastic support member 1340. During the shoe-making process, the central positioning mark can be identified visually or tactilely to accurately align the elastic shoe support with the center of the back part of the shoe. Through this alignment, it is ensured that the elastic shoe support provides uniform support, avoids the skew of the back part of the shoe, and improves the aesthetic feeling and wearing comfort.

[0054] In this embodiment, refer to Figure 1 , the elastic support member 1340 is installed between the upper material and the lining material of the back part 12 of the shoe. The installation method is simple and similar to the traditional method of installing a hot melt sheet or a stiffener. To prevent the elastic support member 1340 from shifting between the upper material and the lining material, it is recommended to apply a small amount of glue during installation to fix and paste it. The filling material can be a soft material such as sponge that can absorb impact force to improve the comfort of foot contact. In this embodiment, the sponge with a thickness of 1.0 to 2.0 cm is used, and the two side edges of the elastic shoe support should be covered with the filling material to prevent rubbing the foot.

[0055] In other embodiments of the present invention, the elastic support member 1340 can be assembled to the outside of the back part 12 of the shoe, and a good hands-free effect can also be achieved. It can also be partially hollowed out or designed with patterns to increase the aesthetic feeling of the appearance of the shoe.

[0056] In this embodiment, the fine texture on the surface of the formed elastic support member 1340 enhances the adhesion of the adhesive. The depth of these textures can be no more than 0.5 mm, and the forms can be linear, reticular, dot-shaped, frosted, polished, wavy, spotted, concave-convex, spiral or granular, etc. These textures are distributed on the surface of the elastic support member 1340, and by increasing the contact area and friction force, the adhesion performance of the adhesive is significantly improved. This design is significantly different from the smooth surface in the prior art and provides a better adhesion effect.

[0057] In this embodiment, refer to Figures 2-4, the lower fixing part 1343 of the elastic support member 1340 adopts a slightly triangular shape with stability. The purpose of this design is to enhance the fixing effect of the elastic shoe support in the upper part of the shoe, ensuring that sufficient support force and stability can be provided during wearing. This slightly triangular structural form can effectively disperse external forces and improve the rigidity of the overall structure, thereby maintaining the stability of the shape and function of the shoe during use.

[0058] In other embodiments of the present invention, the lower fixing part 1343 of the elastic support member 1340 can also adopt other shapes or directly follow the width of the support part 1342, as long as the fixing effect of the elastic support member 1340 in the upper part 10 of the shoe can be ensured, and other shapes of the fixing part 1343 also fall within the protection scope of the present invention.

[0059] In other embodiments of the present invention, the elastic support member 1340 can also be implemented in sandals. As Figure 6 shown, the elastic support member 1340 is installed in the rear strap of the sandal, the pressure-bearing part 1341 corresponds to the highest point in the center of the back of the rear strap, the support part 1342 is the support body of the rear strap, the fixing part 1343 is located at the lowermost part of the rear strap and is fixed to the bottom of the rear strap by sewing or other means, or the fixing part 1343 is bent and pulled to be fixed between the middle bottom 30 and the shoe bottom 30, jointly constituting the support frame of the rear strap. When the experimenter's heel steps on the central part of the back of the rear strap, the internal elastic support member 1340 will be subjected to an external force, and the support part 1342 will bend backward and downward along an arc trajectory, causing the entrance of the sandal to expand. At the same time, the heel slides down along the pressure-bearing part 1341, easily passes through the shoe opening 10, and then smoothly slides into the shoe cavity of the sandal to complete the shoe-wearing action. When the heel slides into the shoe cavity, the expansion force acting on the support part 1342 will disappear instantly, and at the same time, the support part 1342 will instantly return to its original shape due to the resilience force to narrow the shoe opening 10. The V-shaped arc with a wider front and a narrower rear formed by the two support parts 1342 and the pressure-bearing part 1341 can hold the bottom part of the Achilles tendon of the foot so that it is not easy to fall off. This structural design not only ensures the wearing comfort of the shoes but also increases the types of shoes to which the present invention can be applied.

[0060] The hands-free shoe of the present invention has a simple design and production process, can be mass-produced by conventional production equipment, and has high market competitiveness and application value.

[0061] Applicable to a wide range of application scenarios, especially for groups such as the elderly, disabled people, pregnant women, etc. For these groups, putting on and taking off shoes is often a troublesome operation, and the hands-free shoes of the present invention can greatly improve the convenience of them putting on shoes. At the same time, the present invention is also particularly applicable to occasions where shoes need to be put on and taken off frequently, such as medical staff, athletes, etc., and these groups have higher requirements for the convenience and comfort of putting on and taking off shoes.

Claims

1. An elastic support member, characterized in that: it has a first form and a second form; The first form is a planar form; The second form is installed on the shoe and is a three-dimensional form, including a pressure-bearing part and two supporting parts; The pressure-bearing portion is located at the bottom of the Achilles tendon of the heel and is concave facing the foot. The upper part of the concave surface is tilted backward to form an inclined surface toward the inside of the shoe. The inclined surface is straight when viewed from the side. The upper parts of the two support parts are respectively connected to the two ends of the pressure-bearing part, and the width is greater than that of the pressure-bearing part; The inclination range of the pressure-bearing portion is adjusted by the shape of the elastic shoe support; The elastic support member is made of a material having supporting force and elastic characteristics. In the second form, when the external force exceeds its supporting strength, the elastic support member will deform, and when the external force is less than its supporting strength, the elastic support member will return to its original shape.

2. The elastic support member according to claim 1, characterized in that: The elastic support member further comprises two fixing parts; The upper part of the fixing part is connected to two ends of the lower part of the supporting part respectively, and has a width greater than that of the supporting part.

3. The elastic support member according to claim 2, characterized in that: The fixing part stitching is fixed to the upper part of the shoe.

4. The elastic support member according to claim 2, characterized in that: The fixing portion can be bent inwardly and fixed to the sole of the foot.

5. A shoe, characterized in that: The invention comprises an elastic support member according to any one of claims 1 to 4.

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