Hand-free shoe

Abstract

The invention designs a hand-free shoe. The key point of the invention is that the elastic supporting piece is arranged in the heel, and the shoe can be easily worn without the help of hand assistance by increasing the foot inlet diameter of the welt when the shoe is worn. 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, it combines an elastic support member based on the principle of stress concentration 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 full-coverage shoes and sandals. Background Art

[0002] With the accelerating pace of modern life and the increasing demand for comfort and convenience among people, hands-free shoes have gradually become an important product category in the market. Especially among the elderly, pregnant women, disabled people, and certain groups with specific needs, the demand is more obvious. Traditional shoes usually require the assistance of both hands for putting on and taking off. Especially at the heel part of the shoes, it is difficult for the heel to smoothly slide into the shoe cavity, and often requires the assistance of hands to adjust the state of the shoe opening and the tongue.

[0003] In the prior art, as disclosed in Japanese Patent Laid-Open No. 2009-077768, a plate-shaped elastic body is installed in the rear strap of a slipper. Again, as disclosed in Japanese Patent Laid-Open No. 2024-128061, a rigid heel structural element is installed in the rear strap of a sandal. The common feature of such components is that the central position at the rear of the rear strap is an arc-shaped convex structure, and the lower fixed part is integrally formed in an approximate L shape. Therefore, it is required that such components be molded three-dimensional structures. The three-dimensional structure requires high mold costs during molding, and also requires more labor costs in the later shoe upper assembly, and the process is complex.

[0004] Therefore, there is an urgent need for a new improved solution that can achieve the function of wearing shoes without hand assistance while reducing mold costs and processing costs, so as to better meet the market demand. Especially for groups such as the elderly and disabled people, this technology can significantly improve the convenience and practicality of wearing, reduce the shoe manufacturing cost, and improve the well-being of middle and low-income groups. Summary of the Invention

[0005] The purpose of the present invention is to provide a hands-free shoe that can be easily worn without the assistance of hands through the design of an elastic support member that combines the principle of stress concentration.

[0006] The present invention also aims to reduce the production cost of shoes, optimize the user experience, increase the convenience and practicality of shoe wearing, while ensuring comfort and stability, and overcome the deficiencies in the prior art through innovative design and manufacturing processes.

[0007] To achieve the above purpose, the present invention proposes a hands-free shoe, and the specific technical solution is as follows.

[0008] A hands-free shoe includes an elastic support member. The elastic support member was originally a sheet-shaped flat body made of a resin material, set in a first form, which is an initial flat state. It is a flat material molded from a resin material and is in a horseshoe shape. 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 the first form, all parts of the elastic support member are on the same plane, presenting a relatively regular shape as a whole. Looking from the outside, there is no obvious three-dimensional sense.

[0009] Preferably, the width of the pressure-bearing part is smaller than that of the support part, and the width of the support part is smaller than that of the fixing part.

[0010] Preferably, the elastic support member is made of a resin material with good supporting force and elastic characteristics. In terms of material selection, TPU (thermoplastic polyurethane), TPE (thermoplastic elastomer), silicone, PE (polyethylene), PP (polypropylene), etc. all have rigidity and good toughness. Among them, the physical properties of TPU are the most suitable.

[0011] Pull the bottom edges of the two fixing parts parallel and pull them apart to both sides, 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. At this time, the back of the side view of the curved surface is a straight line. The inclination degree of the curved surface depends on the magnitude and direction of the stress, as well as the elastic characteristics of the material.

[0012] At the same time, the support part will be distorted as the pressure-bearing part deforms, forming an inclined three-dimensional structure.

[0013] The elastic support member at this time is in a second form, which is a complex curved surface structure with a three-dimensional shape.

[0014] Preferably, the width of the pressure-bearing part is the narrowest, and after being subjected to pressure, its degree of deformation is relatively large. When changing from the flat state to the three-dimensional state, the pressure-bearing part rotates backward the most, forming an inclined shape. This inclined shape provides a guiding function 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 and transfer a part of the stress to the support part and the fixing part.

[0015] Preferably, the width of the support part is between that of the pressure-bearing part and the fixing part. During the process of the plane becoming three-dimensional, the support part twists backward and downward as the pressure-bearing part deforms. Due to its relatively large width, the degree of twist 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 twist of the support part provides a certain amount of 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 recover to its initial three-dimensional state due to elasticity.

[0016] Preferably, the fixing part has the widest width, and its main function is to firmly fix the elastic support member on both sides of the shoe heel. 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 torsion force from the support part and the pressure-bearing part. The relatively large width of the fixing part enables it to better disperse these forces and ensure the stability and reliability of the elastic support member during use.

[0017] Preferably, the shape of the first form of the elastic support member can be appropriately adjusted according to different shoe styles, wearing scenarios, and the inclination amplitude of different shoe heels. The second forms of the elastic support member obtained with different shapes, widths, and angles include, but are 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.

[0018] Preferably, the inclination amplitude of the pressure-bearing part is adjusted by the size of the circular arc of the elastic shoe support. The larger the circular arc of the first form, the larger the inclination angle of the pressure-bearing part in the second form.

[0019] Preferably, the two fixing parts of the elastic support member are sewn or glued and fixed at the binding part of the shoe upper. After the shoe upper is formed by covering the last, the second form is obtained.

[0020] Preferably, the elastic support member corresponds to each part of the shoe upper. Among them, the pressure-bearing part corresponds to the upper part of the shoe heel, the support part corresponds to the inner and outer waists of the shoe heel, and the fixing part corresponds to the lower binding parts of the inner and outer waists of the shoe heel.

[0021] 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 stress. Through its specific inclination and deformation, it can not only facilitate the wearer to quickly put on the shoes but also quickly recover 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.

[0022] Preferably, the elastic support member will deform and bend backward when the external force exceeds its support strength, and will recover and maintain its original shape when the external force is less than its support strength.

[0023] Preferably, the elastic support member, the two support parts and the pressure-bearing part form a V-shape of an arc that is wider in the front and narrower in the back, which can clamp the heel of the foot.

[0024] Preferably, the elastic support member has a substantially uniform thickness, and the width of the inclined surface of the pressure-bearing portion in the second form can be effectively adjusted by adjusting the width of the pressure-bearing portion, the support portion, and their connection parts. The wider the upper and lower widths of the pressure-bearing portion, the wider the width of the inclined surface of the pressure-bearing portion in the second form.

[0025] Preferably, the elastic support member may also be designed with a groove between the support portion and the fixing portion for easy bending. In the process of manufacturing the upper of sandals, the fixing portion is bent along the groove position to be fixed under the midsole plate, which can better play the role of fixing the back strap.

[0026] Preferably, the elastic support member is installed between the upper material and the lining material of the heel 12 of the shoe.

[0027] Preferably, the elastic support member has a fine texture on its surface.

[0028] Preferably, the elastic support member and the fixing portion are roughly triangular in shape and have stability.

[0029] Preferably, when wearing the shoe, when the front end of the human foot is inserted into the shoe and the heel steps down, the pressure-bearing portion is subjected to the downward stepping force and bends rearward and downward, 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 supporting portion will quickly return to its original shape, and the heel of the shoe will also return to its original shape at the same time, locking the heel and preventing the heel from falling off easily. Beneficial Effects

[0030] Compared with the prior art, the present invention has the following beneficial effects.

[0031] Reduced production costs: The use of flat molds saves mold costs. In addition, the three-dimensional sewing problem is eliminated during the upper processing, effectively reducing the production cost of shoes.

[0032] Easy to put on and take off: The elastic shoe stretcher 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. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A side view of a hands-free shoe provided by an embodiment of the present invention.

[0035] Figure 2 This is a design diagram of a first form of an elastic support member of a hands-free shoe provided by an embodiment of the present invention.

[0036] Figure 3 A side view of a second form of an elastic support member of a hands-free shoe provided by an embodiment of the present invention.

[0037] Figure 4 A three-dimensional diagram of a second form of an elastic support member of a hands-free shoe provided by an embodiment of the present invention.

[0038] Figure 5 A schematic diagram of deformation of a support portion of an elastic support member of a hands-free shoe provided by an embodiment of the present invention when subjected to a pedaling force in a second form.

[0039] Figure 6 A side view of a foot entering a shoe cavity of a hands-free shoe provided by an embodiment of the present invention.

[0040] Figure 7 A side view of a hands-free sandal provided in an embodiment of the present invention.

[0041] Figure 8 A plan view of the mold layout of an elastic support member of a hands-free shoe provided in an embodiment of the present invention.

[0042] Figure 9 Schematic diagrams of other embodiments of an elastic support member of a hands-free shoe provided by an embodiment of the present invention.

[0043] In the figure: shoe 1, shoe opening 10, shoe front upper 11, shoe heel 12, shoe middle upper 13, shoe foot 14, elastic support member 100, pressure-bearing part 101, support part 102, fixing part 103.

[0044] The following will describe the embodiments of the present invention in conjunction with Figure 1 - Figure 9 to illustrate the embodiments of the present invention.

[0045] Referring to Figures 1-4 , an embodiment of the present invention provides a hands-free shoe, which includes a shoe upper part 10 composed of a shoe opening 10, a mid-upper 13 on the inner and outer sides of the shoe opening 10, a front upper 11 in front of the shoe opening 10, and a heel 12 behind the shoe opening 10, an insole part, a midsole part, and a sole part. Among them, the heel 12 is composed of a shoe upper material, a filling material, and an elastic support member 100 sandwiched in the middle.

[0046] According to an embodiment of the present invention, referring to Figure 2 , the elastic support member 100 is a sheet-shaped planar body made of a resin material, set in a first form, which is horseshoe-shaped. 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 the first form, all parts of the elastic support member are on the same plane, and the overall shape is relatively regular. From the appearance, there is no obvious three-dimensional sense.

[0047] According to other embodiments of the present invention, the elastic support member 100 can also be realized by simple blanking with a punching knife. Of course, the blanking method can also be cutting with a knife or scissors, laser cutting, etc., which can be changed according to the specific equipment situation, and it is advisable that the cut surface is smooth without burrs.

[0048] To improve work efficiency, referring to Figure 8 shown, a flat die or a knife die can be more effectively typeset relative to a three-dimensional die, improving efficiency and reducing costs.

[0049] The elastic support member 100 is made of a resin material. The resin material usually has a certain elasticity and plasticity, which provides a basis for its formation of a three-dimensional form. 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 elastic support member 100 of the present invention is formed by injection molding with a die. To avoid rubbing the feet, the edge can be designed as an R corner or each part has different thicknesses.

[0050] According to an embodiment of the present invention, the shape of the first form of the elastic support member 100 can be appropriately adjusted according to various styles, wearing scenarios, and the inclination amplitude of the pressure-bearing part 101. Different shapes, widths, and angles result in a second form of the elastic support member including, but not limited to, different inclination angles and lateral widths of the pressure-bearing part 101. It requires the laborious creation of practitioners in this industry to obtain an ideal shape. The key point is that the width of the pressure-bearing part must be narrower than that of the support part.

[0051] According to an embodiment of the present invention, the two ends of the elastic support member 100, namely the fixing portions 103, are fixed to the vamp edge 14 of the shoe upper 10 by sewing or gluing. After last shaping, a second form, i.e., a three-dimensional form, is obtained. When the fixing portions 103 of the elastic support member 100 are fixed to the vamp edge of the shoe upper, connection stresses are generated, and these stresses are transmitted through the fixing portions 103 to other parts of the elastic support member 100, especially the support portion 102 and the pressure-bearing portion 101. This stress transmission causes the elastic support member 100 to gradually transform from a planar form to a three-dimensional form, and the shapes and angles of each part gradually conform to the design requirements. The action of the stresses enables the parts to coordinate with each other and reach a stress balance state.

[0052] According to an embodiment of the present invention, stress concentration refers to the phenomenon that the stress increases significantly in a 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 point. 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 100 twists and inclines backward according to the stress concentration principle to form the pressure-bearing portion 101. Refer to Figure 3 , the rear side of the pressure-bearing portion is straight. The fixing portion 103 of the lower part of the elastic support member 100 is fixed to the vamp edge 14 of the shoe upper 10, and there is a support portion 102 between the pressure-bearing portion 101 and the fixing portion 103.

[0053] According to an embodiment of the present invention, the elastic support member 100 corresponds to each part of the shoe heel 12 respectively. Among them, the pressure-bearing portion 101 corresponds to the upper part of the shoe heel, the support portion 102 corresponds to the middle vamp 13 and the shoe heel 12, and the fixing portion 103 corresponds to the vamp edge 14 of the middle vamp 13.

[0054] In this embodiment, refer to Figure 3 , the pressure-bearing portion 101 is a support for the upper part 131 of the shoe heel, that is, there is also an inclined surface that inclines backward at the top of the shoe heel 12, expanding the entrance diameter of the shoe mouth 10 of the shoe 1. It is appropriate that the length ratio of the front vamp 11 to the shoe mouth 10 in the toe-heel direction after the shoe mouth 10 is expanded is 3:2. When the heel contacts the pressure-bearing portion 101, the pressure will be dispersed along the inclined surface to the support portion 102, causing the support portion 102 to bend and deform backward and downward, thereby further expanding the entrance diameter of the shoe mouth and enabling 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 entry.

[0055] In this embodiment, refer to Figure 3 , Figure 4, the pressure-bearing part 101 is located at the bottom of the Achilles tendon of the heel, in the shape of an arc V-shaped concave with a wider front and a narrower rear facing the foot. The surface slopes backward according to the principle of stress concentration, forming an inclined surface towards the inside of the shoe. The inclined surface appears as a straight backward slope in side view. The pressure-bearing part 101 is the support of the upper part of the shoe heel 12, that is, the middle of the upper part of the shoe heel 12 is low and the outer edge is high. This design inspiration comes from the flat 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 shoe heel 12 can better bear the pressure of the heel, better support the heel, provide good stability, and provide a comfortable wearing experience. And in side view, it presents an inclined surface towards the inside of the shoe. The purpose of this feature is to allow the heel to slide smoothly into the shoe cavity along the upper part of the shoe heel 12. When the foot steps on the upper part of the shoe heel 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.

[0056] In this embodiment, refer to Figure 3 , Figure 4 , the elastic support member 100 has a fixed part 103 at the lower part. The fixed part 103 is fixed to the vamp 14 of the shoe upper 10 by means of sewing. The fixed part 103 is an integral part of the elastic support member 100. When the fixed part 103 is fixed to the vamp 14 of the shoe upper 10, the function of the fixed 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, further dispersing the stress. This effectively strengthens the elastic support member 100 and the entire shoe body structure. This design not only improves the durability and stability of the shoes, but also helps to extend the service life of the shoes.

[0057] In this embodiment, refer to Figure 3 , Figure 4 , the pressure-bearing part 101 uses the principle of stress concentration to form an inclined surface towards the inside of the shoe on the upper part of the shoe heel 12. The main function of its design is to enable the heel to smoothly enter the shoe cavity during the process of putting on shoes, 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 heel 12, and improving the smoothness and comfort of putting on shoes.

[0058] The application of the principle of stress concentration is fully reflected in this improved technology, especially in the design of the elastic shoe support. The principle of stress concentration enables the shoe support member to provide dynamic response under 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 flash-on function, but also reflects the novelty and creativity of the present invention in the field of shoe-making technology.

[0059] In this embodiment, the support parts 102 are respectively connected to both ends of the pressure-bearing part at the upper part. When the shoes are worn normally, the support parts 102 on both sides of the heel can better fix the heel during the wearing process, improving the wearing comfort and stability, and at the same time reducing the possibility of heel displacement.

[0060] In some other embodiments of the present invention, as Figure 9 shown in a, the elastic support member 100 of the planar body in the first form can extend one or several support parts 102 from the lower bottom of the pressure-bearing part 101. Thus, when the elastic support member 100 is deformed into the three-dimensional second form, as Figure 9 shown in b, the extended support parts 102 are arranged at the central position of the rear end of the shoe counter, playing a role in supporting the shoe counter. And the width of the extended support parts 102 can be adjusted according to the style requirements, and the central part bulging backward in the longitudinal direction can further increase the fitting comfort.

[0061] In this embodiment, the elastic support member 100 is made of a resin material with good support force and resilience. In the selection of the resin material, it is recommended to choose materials such as TPU (polyurethane), TPE (thermoplastic elastomer), or TPEE (thermoplastic polyester elastomer). These materials have good elasticity and toughness, can provide sufficient support strength, and have the advantages of wear resistance, durability, high temperature resistance, etc. Therefore, choosing the elastic shoe support made of these new high-elasticity materials can effectively meet the structural requirements of the shoes, while ensuring the wearing comfort and durability. Among them, TPU has excellent elasticity, can quickly deform under force, and can quickly return to its original state after the pressure disappears. For the elastic support member 100, this characteristic is crucial. When the heel steps on the pressure-bearing part 101, the TPU material can make the pressure-bearing part 101 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 TPU can help the elastic support member 100 quickly return to the initial planar state, preparing for the next use. This good elasticity enables the elastic support member 100 to adapt to different foot shapes and pressures, providing stable support and a comfortable wearing experience. The elastic support member 100 needs to withstand a certain amount of pressure and pulling force during daily use, so the strength and toughness of the material are key factors. TPU also has relatively high strength and toughness, and can resist the action of external forces without being easily damaged or broken. At the fixing part 103, TPU can withstand the pulling force and torsion force from the support part 102 and the pressure-bearing part 101, ensuring that the elastic support member 100 is firmly fixed on both sides of the shoe heel 12. At the same time, at the support part 102 and the pressure-bearing part 101, the strength and toughness of TPU can ensure that the elastic support member 100 will not be overly deformed or lose its structural stability during the process of being deformed by force.

[0062] In this embodiment, refer to Figure 5 , Figure 6 , the elastic support member 100 will deform and bend backward when an external force exceeds its support strength. When the external force is less than its support strength, the elastic support member 100 will recover and maintain its original shape. The elastic support member 100 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 portion 102 will be stressed and bend backward and deform. This deformation enables the heel to slide down along the pressure-bearing portion 101, 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 portion 102 will disappear instantly, and at the same time, the support portion 102 will instantly recover 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 portions 102 and the pressure-bearing portion 101 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 fixity of the shoe heel 12, bringing a better user experience to the wearer.

[0063] In this embodiment, the elastic support member 100 has a uniform thickness. By adjusting the width, angle and other shapes of the pressure-bearing portion 101, the support portion 102 and their connecting parts, the inclination angle of the pressure-bearing portion 101 can be effectively changed 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 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.

[0064] In this embodiment, a center positioning mark aligned with the center of the shoe heel 12 can be marked on the elastic support member 100. During the shoe-making process, the center positioning mark can be identified visually or tactilely to accurately align the elastic shoe support with the center of the shoe heel. Through this alignment, it is ensured that the elastic shoe support provides uniform support, avoiding the skew of the shoe heel, and improving the aesthetic feeling and wearing comfort.

[0065] In this embodiment, refer to Figure 1 , the elastic support member 100 is installed between the upper material and the lining material of the shoe heel 12 of the shoe. The installation method is simple, similar to the traditional method of installing a hot melt sheet or a stiffener. To prevent the elastic support member 100 from shifting and moving between the upper material and the lining material, it is recommended to brush a small amount of glue during installation to fix and paste it. The filling material can be selected from soft materials 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.

[0066] In this embodiment, the fine textures on the surface of the formed elastic support member 100 enhance the adhesion of the adhesive. The depth of these textures only needs to be no more than 0.5 mm, and the forms can be linear, reticular, punctate, frosted, polished, wavy, spotted, concave-convex, spiral or granular, etc. These textures are distributed on the surface of the elastic support member 100, and by increasing the contact area and friction, 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.

[0067] In this embodiment, refer to Figures 2-4 , the lower fixing part 103 of the elastic support member 100 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 shoe upper part and ensure that sufficient supporting 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, so as to maintain the stability of the shape and function of the shoes during use.

[0068] In other embodiments of the present invention, the lower fixing part 103 of the elastic support member 100 can also adopt other shapes or directly follow the width of the supporting part 102. As long as the fixing effect of the elastic support member 100 in the shoe upper part 10 can be ensured, other shapes of the fixing part 103 also belong to the protection scope of the present invention.

[0069] In other embodiments of the present invention, the elastic support member 100 can also be implemented in sandals. As Figure 7 shown, the elastic support member 100 is installed in the rear strap of the sandal. The pressure-bearing part 101 corresponds to the highest point in the center of the back of the rear strap. The supporting part 102 is the support body of the rear strap. The fixing part 103 is located at the bottom of the rear strap and is fixed to the bottom of the rear strap by sewing or other means, jointly constituting the support frame of the rear strap. When the heel of the experimenter steps on the central part of the back of the rear strap, the internal elastic support member 100 will be subjected to external force, and the supporting part 102 will bend backward and downward along an arc trajectory, resulting in the expansion of the entrance of the sandal. At the same time, the heel slides down along the pressure-bearing part 101, easily passes through the shoe mouth 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 supporting part 102 will disappear instantly, and at the same time, the supporting part 102 will instantly return to its original shape due to the resilience force to narrow the shoe mouth 10. The V-shaped arc with a wider front and a narrower rear formed by the two supporting parts 102 and the pressure-bearing part 101 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 implemented.

[0070] The hands-free shoes of the present invention have a simple design and production process, can be mass-produced through conventional production equipment, and have high market competitiveness and application value.

[0071] Applicable to a wide range of application scenarios, especially for groups such as the elderly, disabled persons, 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 wearing 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. These groups have higher requirements for the convenience and comfort of putting on and taking off shoes.

[0072] In addition, the design of the hands-free shoes can also be applicable to the children's footwear market. By adding interesting design elements, the hands-free function not only improves the convenience of putting on and taking off shoes, but also increases the fun of wearing shoes.

Claims

1. A hands-free shoe, characterized in that: Including elastic support for the heel of the shoe; The elastic support member is a three-dimensional curved structure formed by deformation of a plane body; The elastic support member comprises a pressure-bearing portion, a supporting portion and a fixing portion; The elastic support member is in the state of a three-dimensional curved structure. The pressure-bearing portion is located at the bottom of the Achilles tendon of the heel, forming an inclined surface that is straight when viewed from the side, so that the heel can slide into the shoe; The supporting part is connected to the pressure-bearing part and the fixing part respectively at the top and the bottom; The pressure-bearing portion has a width smaller than that of the supporting portion and the fixing portion; The fixing part is a roughly triangular shape with stability and is fixed to the foot part.

2. A hands-free shoe, characterized in that: Including elastic support for the heel of the shoe; The elastic support member is a three-dimensional curved structure formed by deformation of a plane body; The elastic support member comprises a pressure-bearing portion, a supporting portion and a fixing portion; The elastic support member is in the state of a three-dimensional curved structure. The pressure-bearing portion is located at the bottom of the Achilles tendon of the heel, forming an inclined surface that is straight when viewed from the side, so that the heel can slide into the shoe; The supporting part is connected to the pressure-bearing part and the fixing part respectively at the top and the bottom; The pressure-bearing portion has a width smaller than that of the supporting portion and the fixing portion; The fixing part is a slightly triangular shape with stability and is fixed under the midsole plate after being bent.

3. The hands-free shoe according to any one of claims 1 and 2, characterized in that: The inclination amplitude of the curved surface of the pressure-bearing portion is adjusted by the distance between the two supporting portions; The angle formed by the two supporting components and the pressure-bearing portion is adjusted by the width of the pressure-bearing portion relative to the supporting portion.

4. The hands-free shoe according to any one of claims 1 and 2, characterized in that: The elastic support member is made of a resin material with good supporting force and resilience. When the external force exceeds its supporting strength, the support portion will be deformed; when the external force is less than its supporting strength, the support portion will return to its original shape.

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