Improved expandable shoe capable of growing three or more sizes with the wearer / user's foot

Abstract

An expandable shoe (01) capable of growing with the wearer / user's foot, comprising: an upper (18) and an expandable sole (16) both capable of automatically adjusting and comfortably accommodating the wearer's foot, resulting in increased comfort, usability and delayed obsolescence; wherein the sole (16) has a plurality of flaps (14) growing upward from the bottom surface of the sole (16) around the perimeter of the sole (16); wherein the shoe (01) is provided with an adjustment mechanism comprising a plurality of cuts positioned at different locations in the sole (16) with certain and / or equal and / or greater distances between the flaps (14), and wherein the cuts effectively change the length and width of the shoe (01) and change the internal dimensions of the shoe (01) to provide a comfortable fit to the wearer / user.

Description

Technical Field

[0001] This invention generally relates to footwear. More particularly, it relates to footwear intended for human use (e.g., children). More specifically, the invention relates to an improved expandable shoe and related methods, which expands to accommodate at least three or more sizes as the foot grows. A single pair of shoes naturally expands to multiple sizes, providing increased usability and product lifespan. Background Technology

[0002] Everyone's feet are different. Traditional shoes are made with average sizes in mind, designed to fit all and any user in a specific size. This makes the fit universal and universal, adapting to the shape of most feet in that size.

[0003] Shoes are made in many sizes for men, women, and children. As each individual grows, their foot size changes, continuing until a certain age. Commercially available shoes are made in different sizes to accommodate this changing sizing. These sizes range from 3.5 to 15 for men, 5 to 13.5 for women, and 5 to 13 for children. Some traditional shoes also come in half and quarter sizes, such as sizes 9, 9.5, and 10, for a better fit.

[0004] It doesn't offer a customized, perfect fit. A new pair of traditional shoes is meant to be forced into, or given time for the user's feet to adapt and adjust to them.

[0005] To provide customers with a custom-fitting look, shoemakers manufacture shoes in all of the aforementioned sizes. This increases inventory, manufacturing costs, and produces more shoes that end up in landfills, becoming harmful to the environment in addition to increasing costs / prices for manufacturers and end consumers.

[0006] Even with such a wide variety of shoe sizes available, wearers often fail to find a perfectly fitting pair. This is because not only the length of their feet but also their width determines how much they can tolerate in shoes.

[0007] In the case of children, their foot size grows as they grow overall, often making the task of finding the perfect shoe fit difficult and frustrating for parents. As a result, this necessitates frequent replacements with increasingly larger shoe sizes.

[0008] Furthermore, existing shoes may or may not have stretch elasticity, and may or may not have fasteners such as laces, straps, zippers, and other similar components to accommodate slightly larger feet. Such fasteners only support / allow space by loosening in one area. They do not naturally and equally expand or contract in all areas. Traditional shoes do not accommodate sizing changes. When feet can no longer fit, the shoes need to be replaced. Essentially, with current footwear technology, each shoe size requires a pair of size-matching shoes. This gives these traditional shoes a very short lifespan, making them useless to the user once feet can no longer fit.

[0009] Improperly fitting shoes can affect sensory nerves and hinder growth, especially in children. Furthermore, in the case of children aged 1 to 12, the number of shoe pairs needed is approximately 15 / 16. To avoid frequent repurchases, parents tend to buy larger sizes, causing the shoes to last longer or be worn more often than expected. This has an impact on discomfort, leading to pronation and supination of the feet. This can potentially result in lifelong disabilities.

[0010] Furthermore, many parents worldwide fail to maintain this frequent purchase of shoes for their children. This leads to three possibilities: hand-me-down shoes from older siblings / relatives, makeshift footwear made from recycled materials, or no shoes at all. In all of these cases, especially the absence of shoes, children's feet are exposed to soil contamination, which can lead to intestinal worms, causing various related illnesses and malnutrition. This also makes them susceptible to cuts and lacerations from sharp objects exposed to the soil.

[0011] To address these issues, traditional shoes require a "forced fit," where the user's foot adapts to their shape and fits perfectly. However, this can also damage the user's natural foot shape, leading to foot problems such as hammer toes, calluses, cysts, and other related foot deformities.

[0012] Some existing sandals with adjustable straps claim to expand to five sizes. These sandals require manual adjustment to each size, and their expansion is neither natural nor finely adjusted to provide a comfortable fit. These sandals have adjustable straps in three areas of the foot (sides, front of the heel, and back). However, compared to this invention, this adjustment is not natural or automatic. Furthermore, as sandals, they do not provide good full-foot protection due to gaps and cuts. This also leads to exposure to soil and other elements that can have adverse effects on the user's feet and overall health. Summary of the Invention

[0013] This invention fully solves all the aforementioned problems, wherein while traditional shoes follow the principle of "foot adapts to shoe," this invention focuses on "shoe adapts to foot." The shoes of this invention are sufficiently expanded to accommodate a wide range of foot sizes, with the expectation that a small number of shoe sizes are needed for all age groups and both sexes.

[0014] The shoes of this invention expand naturally, meaning that each user, with a unique foot compared to others, will have shoes that comfortably adjust to their foot size. The shoes of this invention feature a resilient upper and an expandable sole that automatically adjust and comfortably adapt to the wearer's foot. Therefore, the expansion is automatic and requires no manual intervention to accommodate growing feet.

[0015] This invention relates to an improved, scalable, and adjustable shoe capable of growing with the foot of a person (i.e., the wearer) for multiple different sizes, particularly at least three sizes. This concept allows the shoe to expand as the wearer's foot grows, enabling a single shoe to last three times longer than a conventional shoe. Therefore, a single pair of shoes naturally expands beyond multiple sizes, providing increased usability and product lifespan.

[0016] Therefore, this invention provides a shoe that expands and adapts according to each individual's foot and its growth. It allows for a customized fit and experience for each user as it adapts and adjusts to fit each user, ultimately providing maximum comfort for the feet. Expandable shoes save the money of buying new shoes every few months. With expandable shoes, users can obtain three to five pairs of shoes for the price of one.

[0017] Therefore, one aspect of the present invention relates to an expandable shoe capable of growing with the wearer's / user's foot, comprising: an upper and an expandable sole, both capable of automatically adjusting and comfortably adapting to the wearer's foot, resulting in increased comfort, usability, and delayed wear; wherein the sole has a plurality of flaps growing upward from the bottom surface of the sole around the periphery of the sole (16); wherein the shoe is provided with an adjustment mechanism comprising a plurality of cuts positioned at different locations in the sole, having a certain and / or equal and / or greater distance between the flaps, and wherein the cuts effectively alter the length and width of the shoe and the internal dimensions of the shoe to provide a comfortable fit to the wearer / user.

[0018] The upper includes: a stretchable collar with omnidirectional expansion features and a collar tongue; an upper opening; a stretchable upper piece inseparably sewn / attached to the stretchable collar; a stretchable lower piece inseparably sewn / attached to the stretchable upper piece; and a stretchable thick-knit pattern inseparably sewn / attached to the stretchable lower piece, wherein the stretchable thick-knit pattern is further inseparably sewn / attached to the side and bottom stabilization portions for the foot; wherein the stretchable lower piece is provided with a plurality of breathable ventilation holes, which helps the foot to sweat when the user wears the stretchable shoe; and wherein a pull strap is inseparably attached to the upper at the rear of the shoe.

[0019] The upper is made of a stretchable, mesh, elastic woven material inserted into the sole, and the sole is inseparable from the flaps surrounding the upper.

[0020] The sole has a top line of uniform width configured to extend around the entire upper periphery of the sole, wherein the top line extends at varying depths on the left and right sides of the sole compared to the front and rear sides, and wherein the height of the top line on the front and rear sides of the sole is greater than its height on the left and right sides. The sole has a uniform thickness and a tapered end facing the top line. The sole further has rib-like structural reinforcements on the inner and outer sides.

[0021] The sole has an elastomeric layer / stretchable midsole in its midsole section, which is glued or sandwiched between the lining of the sole and the upper.

[0022] The cut in the flap provided in the sole is an inverted "Y" shaped cut with a guide rounded apex, wherein the guide rounded apex is shaped to avoid tearing and snagging of the flap.

[0023] The cuts provided in the flap of the sole include other optional cut shapes, such as a 'V' shaped cut with a guide vertex, a straight cut with at least one guide vertex, a star-shaped cut with at least four guide vertexes, a wavy cut with at least one guide vertex, a pointed cut with at least one guide vertex, at least two micro-cuts on the top line of the sole, and at least one slit cut on the wall of the sole.

[0024] Another aspect of the invention relates to a last for making expandable shoes, the last having a rounded profile and comprising: a last top; a wide toe cap at its foreground conforming to the natural foot shape of adults and children; a straight bottom line without toe upturn and having zero heel protrusion or drop; and a rounded-corner last without a sole edge line, wherein the last is designed to reference human foot anatomy, including its profile, cross-section, and curves inspired by the human foot.

[0025] Another aspect of the invention relates to a manufacturing method for scalable shoes.

[0026] The main object and advantage of this invention is to provide an improved, expandable shoe for the human (i.e., wearer's) foot.

[0027] Another object and advantage of the present invention is to provide an expandable shoe that can grow to at least three sizes with the wearer's foot.

[0028] Another object and advantage of the present invention is to provide a shoe that can be easily and comfortably worn to allow for healthy foot development.

[0029] Another object and advantage of the present invention is to provide a shoe designed to expand and automatically adjust according to the shape of the wearer's foot to provide a precise fit as the wearer's foot grows, resulting in increased comfort, usability and delayed wear and tear.

[0030] Another object and advantage of the present invention is to provide an expandable shoe, including but not limited to a unique design that can be used by anyone, having an adjustment mechanism that can change the length of the shoe and change the internal size of the shoe to provide a comfortable fit.

[0031] Another object and advantage of the present invention is to provide an expandable shoe for infants aged 0 to 26 months and children up to 9 years old, wherein each shoe in the pair has an adjustment mechanism to accommodate the growth of the infant's or child's foot and to accommodate differences in foot size.

[0032] Another object and advantage of the present invention is to provide a scalable shoe made of flexible but durable materials, such as, but not limited to, lyocell, merinowool and other such highly flexible materials for the upper, and rubber, bio-TPU and other such durable materials for the sole, to withstand wear and tear from long-term use and to provide comfort and protection.

[0033] Another object and advantage of the present invention is to provide a non-slip sole for expandable shoes that allows the wearer to feel the ground both indoors and outdoors. The sole has an optimal thickness to provide protection for the foot, but also allows the wearer to feel the ground, thereby activating the nerve endings in his / her foot and promoting brain development.

[0034] Another object and advantage of the present invention is to provide a scalable footwear specifically designed for and contributing to the United Nations Sustainable Development Goals (SDGs), primarily targeting: (a) SDG3 – Good Health and Wellbeing; (b) SDG12 – Responsible Production and Consumption; (c) SDG9 – Industry, Innovation and Consumption; and (d) SDG17 – Global Partnerships.

[0035] Another object and advantage of the present invention is to provide a shoe that provides extension of the foot in the upward, lengthwise and sideways directions to provide a comfortable fit.

[0036] These and other objects of the invention will become apparent upon further review of the following description. Attached Figure Description

[0037] The invention will be described by way of example and with reference to the accompanying drawings, in which: Figure 1 The illustration depicts traditional shoes.

[0038] Figure 2A A top view of an expandable shoe according to an embodiment of the present invention is shown.

[0039] Figure 2B It shows Figure 2A Side view of the expandable shoe.

[0040] Figure 2C and 2D They are shown respectively Figure 2A The rear and front views of the expandable shoe.

[0041] Figure 2E Show Figure 2A A 3D model of an expandable shoe.

[0042] Figure 2F The diagram shows... Figure 2A An exploded view of the construction of an expandable shoe.

[0043] Figure 3A and 3B Side perspective views of an expandable shoe according to another embodiment of the present invention are shown.

[0044] Figure 4A- Figure 4D The following are orthographic projection views of the sole and flap of a shoe according to an embodiment of the present invention, including top view, side view, front view and cross-sectional view.

[0045] Figure 4E It shows Figure 4A- Figure 4D A three-dimensional diagram of the shoe sole and its flaps.

[0046] Figure 4F A perspective view of the sole and flap of a shoe according to another embodiment of the present invention is shown.

[0047] Figure 5A and 5BA set of hand-drawn sketches are shown, illustrating structural reinforcements, such as ribs, on the inner and outer sides of the sole according to an embodiment of the invention.

[0048] Figure 6 The expansion of the sole due to the opening of the flaps, according to the present invention, is shown.

[0049] Figure 6A A widthwise cross-section of a shoe sole in a non-extended state, according to an embodiment of the present invention, is shown.

[0050] Figure 6B The shaded area is shown to indicate Figure 6A The thickness and profile of the lateral cross section of the shoe sole are shown.

[0051] Figure 6C and 6D They are shown respectively Figure 6A The image shows a transverse cross-section of the sole in its extended state.

[0052] Figure 6E and 6F A longitudinal section and shaded area are shown according to an embodiment of the invention to indicate the longitudinal section thickness and profile of the sole in its unextended state, respectively.

[0053] Figure 6G and 6H Vertical shaded areas are displayed to indicate respectively. Figure 6E The image shows the cross-sectional thickness and profile of the sole in its extended state.

[0054] Figures 6I to 6K They are shown respectively Figure 6 The image shows a side view of the sole in its extended state.

[0055] Figure 6 L(i), Figure 6 M(i) and Figure 6 N(i) respectively show Figure 6 The top view of the shoe sole shown is in its minimum expansion stage.

[0056] Figure 6 L(ii), Figure 6 M(ii) and Figure 6 N(ii) respectively show Figure 6 The top view of the shoe sole shown shows it in the expansion and gradually growing to its maximum expansion stage.

[0057] Figure 6 O(i) Figure 6 P(i) and Figure 6 Q(i) respectively show Figure 6 The three-dimensional diagram of the shoe sole shown is at the smallest stage of expansion.

[0058] Figure 6 O(ii), Figure 6 P(ii) and Figure 6 Q(ii) respectively shows Figure 6 The three-dimensional diagram of the shoe sole shown is in the expansion and gradual growth stage to the maximum expansion stage.

[0059] Figure 6 R(i), Figure 6 R(ii) and Figure 6 R(iii) respectively shows Figure 6 The comparison of the various stages of the sole shown, from the minimum expansion stage to the expansion stage and / or the maximum expansion stage.

[0060] Figure 7A A top view of the flap and its details in a sole separated by an inverted "Y" shaped cut, according to an embodiment of the invention, is shown.

[0061] Figure 7B It shows Figure 7A A more detailed inverted "Y" shaped cut.

[0062] Figure 8A The flaps in the sole are shown in more detail, separated by inverted "Y" shaped cuts, illustrating the feasibility and direction of the extension according to the invention, indicated by arrows.

[0063] Figure 8B The invention illustrates a flap in a shoe sole, the flap being separated by inverted "Y" shaped cuts, from a minimum expansion phase to an expansion phase and / or a maximum expansion phase.

[0064] Figures 9.1 to 9.5 The diagram illustrates cut vertices of various shapes other than the 'Y' shaped cut, according to the invention, from the minimum expansion stage to the expansion stage and / or the maximum expansion stage.

[0065] Figure 10 The invention illustrates the arrangement of multiple flap cuts, taking into account the anatomical arrangement of the human foot relative to the extension of the sole.

[0066] Figure 11A An expandable shoe adapted to a size 22 mold / last is shown according to an embodiment of the present invention.

[0067] Figure 11B The same shoe adapted to a size 24 mold / last according to an embodiment of the present invention is shown (as shown in Figure 3).

[0068] Figure 12 The illustration shows a traditional shoe last with typical forefoot shape, heel shape, toe angle, and heel drop.

[0069] Figures 12A to 12C These are, respectively, a right view, a perspective view, and a left view of the shoe last for the expandable shoe used in this invention.

[0070] Figures 12D to 12I The expandable shoe for use in this invention is shown separately. Figure 12B and Figure 12C The shoe last's bottom view, right view, top view, front view, rear view, and perspective view.

[0071] Figures 13A to 13K The diagram shows... Figures 12A to 12I The shoe last shown is designed with reference to the anatomy, shape, characteristics, and variations of the human foot in different positions.

[0072] Figure 14A The illustration depicts an expandable shoe according to an embodiment of the invention, featuring shaded areas to indicate a thicker and stiffer weave pattern used in the fabric upper construction. This pattern is designed to provide lateral and plantar stability to the foot through its robustness.

[0073] Figure 14B The diagram illustrates the cross-shaded areas to indicate the difference in construction between the fabric upper and the previous one. Figure 14A A thinner, more stretched pattern, wherein the thin and stretched pattern comfortably covers the feet and provides moisture wicking and ventilation according to another embodiment of the invention. It expands well during the expansion process to accommodate growing sizes.

[0074] Figure 14C The illustration depicts an expandable shoe according to another embodiment of the invention, featuring shaded areas to indicate a very thin, light, and elastic woven pattern used for the fabric upper construction, wherein the pattern is located in the collar area of ​​the shoe and is highly expandable to allow the foot to enter the shoe easily and comfortably.

[0075] Figure 14D The illustration shows an expandable shoe according to another embodiment of the invention, with different shaded areas to indicate different weave patterns.

[0076] Figure 14E The illustration depicts an expandable shoe according to the invention, featuring shaded objects to indicate the sole inserted after the shoe is manufactured.

[0077] Figure 15A and Figure 15B The illustration shows children's growth patterns relative to age.

[0078] Figure 16 The illustration shows a comparative example of the use of the conventional and expandable shoes of this invention by children aged 1-9 years. Detailed Implementation

[0079] Although specific embodiments of the invention will now be described with reference to the accompanying drawings, it should be understood that these embodiments are merely examples and illustrative, representing only a small number of specific embodiments among many possible applications of the principles of the invention. Various changes and modifications that will be apparent to those skilled in the art are considered to be within the spirit, scope, and contemplation of the invention.

[0080] like Figure 1 As shown, conventional shoes, as a general rule, have space for foot growth in front of the toes. This space and overall construction of conventional shoes create numerous gaps 106 within the shoe. As can be seen, the gaps 106 are visible in all directions: front, back, sides, top, and bottom. The gaps 106 allow the foot to move within the shoe during activities such as running, hindering the wearer's movement. Using fasteners such as laces or straps cannot completely solve this problem. Since no two feet are identical in shape, and conventional shoes are constructed to fit an average size, the gaps 106 still exist in the shoes of every wearer / user.

[0081] Now for reference Figure 2A A top view of an expandable shoe 01 according to an embodiment of the present invention is shown; Figure 2B It shows Figure 2A Side view of the expandable shoe 01; and Figure 2C and 2D They are shown respectively Figure 2A The rear and front views of the expandable shoe 01; Figure 2E It shows Figure 2A A 3D view of the expandable shoe 01; Figure 2F It shows Figure 2A An exploded view of the structure of the expandable shoe 01.

[0082] like Figures 2A to 2F As shown, the expandable shoe 01 is basically composed of two main parts, namely, the sole 16 and the upper 18. The sole 16 protects the bottom of the foot from the ground, and the upper 18 covers the top of the foot.

[0083] The sole 16 is designed with multiple flaps 14 growing upwards from the bottom surface of the sole 16 around its perimeter. These flaps 14 are configured to surround the wearer's / user's foot from all sides. The flaps 14 are separated by multiple flap cutouts 110 located at different positions in the sole 16, such that there is a certain and / or equal and / or greater distance between the flaps 14 and the flap cutouts 110. The sole 16 has a sole top line 16A ( Figure 2E ), and a bottom line with a sole claw 10.

[0084] The upper 18 is made of a stretchable, elastic woven material, which is embedded within the sole 16 and is inseparable. A flap 14 surrounds the upper 18. The upper 18 and sole 16 are assembled together as a single shoe 01 by known means and methods, such as, but not limited to, strobel construction and cold glue construction processes. The upper 18 is woven and prepared into its form, wherein the upper 18 includes: a stretchable collar 18A having an omnidirectional expansion feature 18A1 and a collar tongue 18A2 (as shown in the image). Figure 2B and Figure 2E As shown), the shoe upper opening 18F; a stretchable upper piece 18B, which is inseparably sewn / attached to the stretchable collar 18A; a stretchable lower piece 18C, which is inseparably sewn / attached to the stretchable upper piece 18B; a stretchable thick, stiff woven pattern 18D, which is inseparably sewn / attached to the stretchable lower piece 18C; and a stretchable thick, stiff woven pattern 18D, which is further inseparably sewn / attached to the side and bottom stability parts 18E for the foot. The stretchable lower piece 18C is provided with multiple breathable ventilation holes 18C1, which helps to wick away sweat from the feet when the user wears the stretchable shoe 01.

[0085] like Figure 2B , 2C As shown in Figure 2E, a pull strap 22 is inseparably attached to the upper 18 on the rear side of shoe 01. The pull strap 22 helps the wearer / user put on shoe 01.

[0086] As shown in Figure 2G, the upper 18 is then placed on the foot mold / last 44, and a fabric insole is sewn to the underside of the upper 18 using a midsole fabric construction, with the last 44 located inside. The insole 26 is inserted into the upper 18. This final upper 18, with the last 44 inside, is bonded to the inside of the molded sole 36 using adhesive and a press. This process is called cold glue construction.

[0087] The sole 16 and upper 18 work together in conjunction. The sole 16, with its expandable features, has a robust construction configured to provide comfort to the wearer / user. The sole 16 has a top sole line 16A (as shown in the image). Figure 2C , 2EAs shown in Figure 2F, its configuration provides protection for the expandable shoe 01 and its wearer / user. The top sole line 16A extends around the entire upper periphery of the sole 16 with a uniform width, wherein the top sole line 16A extends with varying depths on the left and right sides of the sole 16 compared to the front and rear of the sole 16. Thus, the top sole line 16A has a greater height at the front and rear of the sole 16 compared to its height on the left and right sides. In an alternative embodiment, the top sole line 16A may have a varying width, for example, a greater width at the front and rear compared to the sides of the expandable shoe 01. When a larger-sized foot enters the expandable shoe 01, the flaps 14 on the periphery of the sole act like flower petals and open outwards, thereby supporting the foot and acting as an increased surface area of ​​the sole 16, while the upper 18 also stretches to accommodate the foot within the expandable shoe 01. The elasticity of the woven upper 18 restores the expandable shoe 01 to its initial shape after the foot is removed from the expandable shoe. This feature not only makes the Scalable Shoe 01 more comfortable by adapting to the wearer's foot, but also allows for extended lifespans with multiple sizes, making it a sustainable alternative to traditional shoes.

[0088] As can be seen, the flaps 14 of the sole 16 have unique new design features added to the traditional sole design. These flaps 14 open according to the shape of the wearer's foot, as much as needed and where. Each flap 14 will open to a different degree depending on the different foot shapes of different wearers / users.

[0089] Any two people can have the same foot length but different widths or thicknesses. Normally, two people can get shoes of the same size, which will not fit either of them properly. Sometimes, even the left and right feet may be slightly different in shape. The expandable shoe 01 of this invention adapts to the individual size and characteristics of each foot, and the flaps 14 open or retract accordingly. This greatly benefits the user in terms of comfort.

[0090] like Figure 2F As shown, the upper 18 of the expandable shoe 01 is a breathable mesh weave that stretches and softens against the skin. The upper 18 provides all-around protection for the foot while maintaining the lightweight nature of the expandable shoe 01. The upper 18 material absorbs moisture and sweat and evaporates it externally, keeping the user's feet dry and ventilated. The stretchable, elastic upper 18, coupled with the expandable sole 16, makes any fasteners such as laces, straps, and zippers entirely optional.

[0091] Further as Figure 2FAs shown, the insole 26 is positioned above the upper midsole plate 18G, which has an upper pad binding stitching 18H and is received by the inner surface 12 of the sole 16. The top line 16A of the sole 16 has a tapered end 24A that seamlessly joins to the upper 18 of the expandable shoe 01, as... Figure 2E The finished product is shown in the figure. The flaps 14 in the sole 16 are separated by a plurality of flexible inverted "Y"-shaped cuts 110 having guide rounded apexes 110A. The flaps 14 are pushed outward from the outwardly expanding front flaps 14A, and the curved walls of the flaps 14 bend outward to accommodate a precise foot, resulting in a larger footprint for the sole 16. However, the cuts 110 are not limited to an inverted Y shape and can be constructed in any other shape to achieve the desired expansion of the sole 16. These cuts 110 enhance the movement and expansion of the flaps 14, and allow for further fine-tuning of the foot shape.

[0092] Now refer to Figure 3A and Figure 3B These figures illustrate side perspective views of an expandable shoe 01 according to another embodiment of the invention. The expandable shoe 01 is provided with a sole 16 with a bottom line, the sole 16 having sole claws 10, and flaps 14 having a plurality of inverted Y-shaped cutouts 110 with guide rounded apexes 110A. The flaps 14 are pushed outward from the outwardly expanding front flaps, and the curved walls of the flaps 14 bend outward to accommodate a precise foot, resulting in a larger footprint for the sole 16. However, the cutouts 110 are not limited to an inverted Y shape and can be constructed in any other shape to achieve the desired expansion of the sole 16. The sole 16 also has a sole top line 16A and flexible V-shaped cutouts 16B. The V-shaped cutouts 16B in the sole improve the flexibility of the sole 16 and facilitate the natural folding of the foot during movement.

[0093] An upper 18 made of a stretchable elastic woven material is fitted within an inseparable sole 16, with flaps 14 surrounding the upper 18. The upper 18 and sole 16 are assembled together to form a shoe 01. The upper 18 is woven and prepared into its form, wherein the upper 18 includes a stretchable collar 18A, an elastic band 21, a tongue 19, and a stretchable upper panel 19A, each of which is inseparable sewn / connected, wherein the stretchable upper panel 19A is inseparable sewn / connected to a stretchable thick woven pattern 18D having lateral and heel stabilization portions 18E for the foot.

[0094] One pull strap 22 is inseparably attached to the stretchable collar 18A on the front side, and another pull strap 22 is attached to the upper 18 on the rear side of the shoe 01. The pull straps 22 assist the wearer / user in putting on the shoe 01. The stretchable upper 19A is provided with multiple breathable ventilation holes 18C1, which helps to wick away sweat from the feet when the user wears the stretchable shoe 01. The flexibility and operability of the flexible inverted Y-shaped cutout 110 are similar to those described above. Figures 2A-2F The embodiment of the inverted Y-shaped cut 110 discussed herein.

[0095] Figure 4A to Figure 4F The diagram shows orthographic projection views of the sole 16 and its flap 14 according to an embodiment of the present invention, including a top view, side view, front view, and cross-sectional view. For example, a cross-sectional view 24 of the sole is shown... Figure 4D As seen in the image, the thickness of the sole 16 is uniform throughout most of the cross-section 24, but the tapered portion 24A narrows towards the edge at the top of the sole 16. The flaps 14 are separated by a plurality of flexible V-shaped cutouts 27 formed within the flaps 14. The sole 16 has an inner sole surface 12 for receiving the wearer's / user's foot thereon. The flexible V-shaped cutouts 27 may be arranged in the sole 16 in an equidistant manner or alternatively in a manner with varying distances between two such V-shaped cutouts 27. With these flexible V-shaped cutouts 27, when a larger-sized foot enters the expandable shoe 01, the flaps 14 on the periphery of the sole 16 function like petals and flare outwards, thereby supporting the foot and acting as and providing an increased surface area of ​​the sole 16 to comfortably accommodate the foot within the wearer's / user's expandable shoe 01. The sole 16 with its flexible V-shaped cutout 27 not only makes the expandable shoe 01 more comfortable by adapting to the wearer's foot, but also allows for extended lifespans with multiple sizes, making it a sustainable alternative to traditional shoes.

[0096] Now for reference Figure 4F A perspective view of a sole 16 and its flaps 14 according to another embodiment of the invention is shown, wherein the flaps 14 are separated by a plurality of flexible inverted Y-shaped cuts 110, rather than flexible V-shaped cuts 27. The sole 16 has a top sole line 16A and an inner sole surface 12 for receiving the wearer's / user's foot thereon. With these flexible Y-shaped cuts 110, when a larger-sized foot enters the expandable shoe 01, the flaps 14 on the periphery of the sole 16 function like petals and flare outwards, thereby supporting the foot and providing increased surface area due to the greater expansion capability of the Y-shaped cuts 110 of the sole 16, so as to comfortably accommodate the foot within the wearer's / user's expandable shoe 01. This feature of the sole 16 with flexible Y-shaped cuts 110 not only makes the expandable shoe 01 more comfortable by adapting to the wearer's foot, but also allows for extended lifespans with multiple sizes, making it a sustainable alternative to traditional shoes.

[0097] In addition, such as Figure 5A and Figure 5B As shown, the sole 16 of the present invention may have structural reinforcements, such as ribs 25, added to its inner and outer sides. Ribs 25 are thin protrusions that extend laterally and vertically from a wall or plane to provide increased stiffness and strength to the sole 16. Figure 5AAs shown, rib 25 also has a break / cut on the inside of the sole 16 to support the expansion of the flap 14. Similarly, as Figure 5B As shown, ribs 25 are positioned on the outer side of the sole 16 to support the expansion of the flap 14. The ribs 25 smoothly merge with the tapered portion 24AA of the wall section of the sole 16 towards their end edges. The ribs 25 increase the strength of the sole 16 without thickening the wall of the sole 16, reducing the weight of the sole 16, requiring less material, and preventing other defects in the manufacturing process. These ribs 25 help the sole 16 and its outsole 23 maintain their initial, unexpanded form. Therefore, the ribs 25 provide sufficient additional support to allow the sole 16 and its flap 14 to expand. However, maintaining the unexpanded state is not essential but will depend on factors such as its size, the material composition of the sole 16, and other such manufacturing factors. Supporting elements (like the ribs 25 in the sole 16) function as a skeletal structure of the sole 16 and help hold the flap 14 upwards, allowing for free and smooth expansion. Considering the above, the position and workability of the ribs can be varied based on the width of the flap 14 for stability.

[0098] Figure 6 A perspective view of the sole 16 and its flap 14 according to the invention is shown. It can be seen that the extended and unextended positions of the sole 16 with flap 14 are shown. The flap 14 in the sole 16 is separated by a plurality of flexible inverted "Y"-shaped cutouts 110 having guide round apexes 110A. When the wearer / user's foot is received within the sole 16, force is applied outwardly to the wall of the sole 16, wherein the flexible inverted "Y"-shaped cutouts 110 in the initial unextended position expand due to the expansion of the guide round apexes 110A of the inverted "Y"-shaped cutouts, and cause the flap 14 to expand into the extended flap 14AA.

[0099] Further reference Figure 6 and Figures 6A to 6H This shows that due to the opening of the extended front flap 14A, the flap 14 of the sole 16 extends from a non-extended state to an extended state. It can be seen that the sole 16 of the expandable shoe 01 undergoes... Figure 6B The gradual expansion of the sole 16 in (where the flap 14A is not extended) is shown in Figure 7D (where the expansion of the flap 14 is greatest). This expansion of the flap 14 depends on the wearer's foot size or, in the case of a child, how that size grows. Figures 6A-6H As can be seen, in this particular embodiment, the cross-section of the sole is a tapered portion 24A that narrows towards the top line 16A of the sole 16. Figure 6E As shown, the tapered portion 24A is seamlessly joined to the upper 18 of the expandable shoe 01.

[0100] like Figure 6 , 6AAs shown in 6H and 8, the flaps 14 in the sole 16 are separated by a plurality of flexible inverted "Y"-shaped cuts 110 having guide rounded apexes 110A. The flaps 14 are pushed outward from the outwardly expanding front flaps 14A, and the curved walls of the flaps 14 bend outward to accommodate a precise foot, allowing for a larger footprint in the sole 16. However, the cuts 110 are not limited to an inverted Y shape and can be constructed in any other shape to achieve the desired expansion of the sole 16. These cuts 110 enhance the movement and expansion of the flaps 14, and allow for further fine-tuning of the foot shape. (As shown in...) Figures 6A to 6H As can be seen further, the thickness of the sole 16 is uniform for most of the sole cross-section 24A. However, to increase the flexibility of the sole 16, the thickness of the sole 16 gradually thins towards the edge of the top line 16A of the sole 16. The outer surface of the sole 16 is provided with sole claws 10.

[0101] Figures 6I to 6 Q illustrates the gradual expansion of the inverted "Y"-shaped cut 110, with the flaps 14 initially having gradually increasing gaps between them in various views. As the foot enters the expandable shoe 01, the flaps 14 move and adapt to the shape of the user's sole and foot, depending on the wearer's foot. This adaptation of the sole 16 to changing / increasing sizes is feasible for up to three sizes. The flaps 14 are pushed outward from their initial unexpanded state, and the curved walls of the flaps 14 bend outward to accommodate the precise foot, resulting in a larger footprint for the sole 16. Moreover, in the case of children, the sole 16 gradually expands daily as the child grows. The sole 16 will be flexible enough to accommodate such growth of up to three sizes without restricting the shape, growth, and health of the child's foot. The guide rounded apex 110A of the cut helps prevent the cut 110 from tearing along the sole 16.

[0102] The gradient and stable shape of the sole 16 and the expansion of the flap 14 can... Figure 6 As seen in R, in step 1, there is no flap extension or only minimal flap extension; in step 2, there is a medium extension or an extension up to size 2; and in step 3, there is an extension up to size 3 or the full size of sole 16.

[0103] like Figure 7A , 7BAs shown in 8A and 8B, the inverted Y-shaped cut 110 allows each flap 14 to expand more smoothly from its initial unexpanded state to its expanded state due to the guide circle apex 110A. The inverted Y-shaped cut 110 also allows for three-dimensional movement of each flap 14, thus providing greater fit and comfort. In fact, the wearer's foot determines the movement or expansion degree of each flap 14 based on the structure and shape of their left and right feet respectively. Therefore, the arrangement of the sole 16 with flaps 14 featuring the inverted Y-shaped cut 110 always provides the wearer with a customized fit at all times. The apex of the cut is the guide circle 110A and is shaped into a circle to prevent tearing and snagging of the flaps 14. This design feature also ensures a longer lifespan and usability of the sole 16.

[0104] refer to Figure 8B The sole 16 has an elastomeric layer 710 in its midsole section. This stretchable elastic midsole 710 is bonded or sandwiched between the lining of the sole 16 and the upper 18. As the sole 16 expands and the inverted Y-shaped cut 110 opens, the elastic midsole stretches within the inverted Y-shaped cut gap 710A, thereby creating a protective layer between the sole 16 and the upper 18. The stretchable elastic midsole 710 also provides additional strength and full protection for the expandable shoe 01. The elastomeric layer 710 can have various other material properties, such as being non-perforated, having memory properties, and maintaining the shape of the user's foot.

[0105] The elastomeric interlayer 710 between the inner sole 16 and the upper 18 can be combined with any other embodiment of the aforementioned "Y"-shaped cutout, and is not limited to this. Figures 9.1 to 9.5 .

[0106] One bonding technique used for the elastomer interlayer 710 is as follows: (i.) Adhesive is placed on the inner surface of the cut 110 of the sole 16 and the flap 14, and the same markings at the cut 110 locations of the flap 14 are placed on the upper 18. The elastomer layer 710 is then bonded between the sole 16 and the upper 18. It is ensured that no adhesive is used for the elastomer 710 along the extended “Y”-shaped cut line / area 110A. This allows the extended Y-shaped cut area 110A to expand freely. (ii) Another bonding method for the elastomer layer 710 is to sew the “Y”-shaped cut 110 contour along the sole 16, the midsole elastomer 710, and the upper 18. This bonding arrangement ensures that the area in the extended midsole elastomer 710A moves freely with the “Y”-shaped cut extension 110A.

[0107] The concept discussed above and its operability can be applied to cut vertices of any shape other than the inverted 'Y' cut 110, for example, as Figure 9.1 , 9.2The alternative cuts shown in 9.3, 9.4, and 9.5. Each of these different shaped cuts effectively helps the sole 16 to gradually expand to fit the wearer's / user's foot size, thus providing a comfortable wearing experience.

[0108] exist Figure 9.1 In the process, there exists a straight cut 210 with a single guide circle vertex 210A, and another variation of the cut is a "star" cut 310 with four guide circle vertices 310A. Figure 9.5 The "star-shaped" cutout with four leading circle vertices is shown in detail, illustrating its expanded features from its initial unexpanded state to its expanded state. Figure 9.2 In the middle, the sole 16 is provided with a “wave” cutout 410 with a single guide circle vertex 410A, which is from an unexpanded initial state to an expanded state. Figure 9.3 It has a "tip" cutout 510, which has a single guide circle vertex 510A.

[0109] refer to Figure 9.4 It shows two micro-cuts 610A on the top line 16A of the sole 16 and a slit cut 610 on the wall of the sole 16. The slit 610 is expanded with the help of the micro-cuts 610A on the top line 16A to expand the sole 16 of the expandable shoe 01.

[0110] Now refer to Figure 10 As can be seen, relative to the expansion of the sole 16, multiple flap incision locations 14B are arranged considering the anatomy of the human foot. The flaps 14 are positioned in the front 14C, sides 14D, and rear 14E of the sole 16. The front flap 14C helps expand the forefoot portion, the side flap 14D helps open the area, increasing the width of the foot and accommodating wider feet. The rear flap 14E ensures the heel grows in its natural shape without obstruction. The flaps 14 are positioned and designed to provide unobstructed yet supported growth for the wearer's foot. The expandable shoe 01 is designed to assist and expand the natural, unrestricted growth of the foot. The sole 16 should still provide sufficient protection during expansion, even though the gaps in the incisions have increased. Therefore, the location of the incisions is driven by the curves of the foot. Multiple flap incisions 110 (e.g., as...) Figures 6A to 6 (As shown in R) is positioned to adapt to the growing size of the foot without reducing protection.

[0111] The flap cutout location 14B is crucial for the proper extension of the sole 16 and therefore the shoe 01. Cutout 110 (e.g., as...) Figures 6A to 6 (As shown in R) The flaps are at least as wide as possible and extend to the top line 16A of the sole. In this embodiment, the number of flaps 14 is not limited to 10-14. The number of flap cutouts 110 can vary in different shoes or other shoes. The flaps 14 can be rounded, chamfered, or have protective supports at their edges.

[0112] Figure 11A Figure 11b illustrates an expandable shoe 01 that accommodates natural foot-shaped lasts 44 of sizes 22 and 24, respectively, according to an embodiment of the invention. The mint green portion is the upper 18, while the black portion is the sole 16 with flaps 14, which are expandable. The flaps 14 have multiple flexible V-shaped cutouts 27. The upper 18 of the shoe 01 has a collar 18AA, which is formed by stitches 21B at the opening through which the user's foot passes. The heel counter 21A is located on the rear side of the upper 18 of the shoe 01, and a gusset 19AA is located in the front portion of the upper 18. The expansion and operability of the flexible V-shaped cutouts 27 are similar to those of the cutout embodiments discussed above. As can be seen, the stretchable upper 18 and the expandable sole 16 with flaps 14 open to accommodate larger-sized foot molds / lasts 44.

[0113] refer to Figure 12 Traditional shoe lasts are typically depicted with a forefoot shape, heel shape, toe angle, and heel drop. However, a drawback of this traditional last is that it does not actually match the natural foot shape. This shortcoming causes discomfort to the wearer / user.

[0114] Now refer to Figures 12A to 12I The last 44 for the expandable shoe 01 of the present invention is shown in various locations (e.g., Figure 3B (As shown). A shoe last is a mechanical form shaped like a human foot. It is the foot-shaped mold / shoe last 44, which defines the final manufacturing form of shoe 01. Shoe last 44 is so named because of a common operation known in shoe manufacturing called last removal, which occurs at the end / final stage. In this operation, the foot-shaped mold / shoe last 44 is removed from shoe 01, completing shoe 01.

[0115] Therefore, shoe last 44 was used by shoemakers during the manufacture and repair of shoe 01. Shoe last 44 usually comes in pairs and has been made from various materials, including hardwood, cast iron, and high-density plastic. Depending on the exact job for which the shoe last 44 was designed, it comes in many styles and sizes. While the shoe last 44 is generally shaped like the human foot, the precise shape is customized to the type of footwear to be manufactured. For example, a finished shoe last 44 will be designed with a narrow toe box for aesthetic purposes.

[0116] Historically, shoe lasts were typically made of hardwood and cast iron because these materials retain their shape even when in contact with wet materials (like leather) and subjected to the mechanical stresses of stretching and shaping the shoe. Today, wooden shoe lasts are generally used only in bespoke shoemaking, particularly in Europe and North America.

[0117] The materials used in modern shoe lasts are chosen to be strong enough to withstand the forces of mass production machinery, such as those applied by a lacing machine when the shoe is being soled, and must also be able to hold the handpins (known as "climbing shoe handpins"), which are used to temporarily hold shoe parts together before the sole is added. While hardwood meets these criteria, modern shoe lasts, especially those used in large-scale production plants (such as in China), are often made of high-density polyethylene plastic (HMW-HDPE), which allows for numerous handpin holes before repairs are needed. Another advantage of this type of plastic is that it can be recycled and remolded when it wears out.

[0118] from Figures 12A to 12I It can be seen that the shoe last 44 required by the present invention (such as...) Figure 3B (As shown) It is specially designed with keeping foot comfort and health as the main focus. Figure 12A-12I The shoe last 44 has a top 88 and a wide toe cap 82 at the front, which differs from the most common shoe lasts which have a narrow front, i.e., a narrow toe cap, such as... Figure 12 As shown. The wide toe box 82 is designed to conform to the natural foot shape of adults and children. This wide area allows for unimpeded growth. Since the last 44 controls the overall shape, size, fit, and appearance of the shoe 01, it is important to incorporate it into the "last level." Furthermore, Figures 12A to 12I The shoe last 44 has a straight bottom line 10, no toe curve, and zero heel protrusion 86 or drop 84. The shoe last 44 of this invention does not have a sole-less edge line, but rather a rounded-corner shoe last 92 without an edge, as shown... Figure 12G and 12H As shown. The shoe last 44 is designed to manufacture a shoe that is as similar as possible to the anatomy of the human foot, rather than any fashion aesthetic style. The shoe last 44 design of this invention prioritizes foot comfort, health, and functionality over contemporary shoe aesthetics, such as a wide toe box 82 instead of a narrow toe box, zero drop, no toe hump, and no heel stack height. The shoe last 44 has a rounded profile 90, as... Figure 12D As shown.

[0119] Figure 12I The shoe last 44 shown has been designed with reference to human foot anatomy 94D, shape, characteristics, and their variations, such as... Figures 13A to 13K As shown. The shoe last 44 has its outline, sections 94B and 94C, and curves inspired by the human foot. The bottom / sole of the shoe last is rounded 90 degrees, unlike conventional shoe lasts which have defined edge lines. Therefore, the shoe last 44 of the present invention resembles the shape of a natural foot and the sole 94D of a human foot. The shoe last 44 used in the present invention is also varied according to the age group of the user for whom the shoe 01 is made.

[0120] refer to Figure 14AThe illustration shows an expandable shoe 01 according to an embodiment of the invention, having a sole 16, a collar 18AA, and a stretchable upper 18B, with shaded areas inseparably attached to indicate a thicker and stiffer woven pattern 18D used for the construction of the fabric upper 18. This pattern 18D is designed to provide lateral and plantar stability to the foot through its robustness.

[0121] Figure 14B An expandable shoe 01 according to another embodiment of the invention is shown, having a sole 16, a collar 18AA, and a stretchable upper 18B, with cross-shading areas to indicate the construction of the fabric upper 18 compared to the previous one. Figure 14A Thinner, more stretchy pattern, where the thin, stretchable pattern comfortably covers the foot and provides moisture wicking and ventilation. It stretches well during expansion to accommodate growing sizes.

[0122] Figure 14C An expandable shoe 01 according to another embodiment of the invention is shown, having a sole 16, a collar 18AA and a stretchable upper 18B, with shaded areas to indicate a very thin, light and elastic woven pattern for the construction of the fabric upper 18, wherein the pattern is located in the collar area of ​​the shoe 01 and is highly expandable to allow the foot to enter the shoe easily and comfortably.

[0123] Figure 14D An expandable shoe 01 according to another embodiment of the invention is shown, having different shaded areas to indicate different weave patterns, having a sole 16, a collar 18AA and a stretchable upper 18B, with shaded areas inseparably attached to indicate a thicker and stiffer weave pattern 18D for the construction of the fabric upper 18.

[0124] Figure 14E An expandable shoe 01 according to the invention is shown, having shaded objects to indicate the insole 26, the insole 26 having a width shown by a cross section 24 inserted after manufacturing, the shoe 01 having a sole 16 with a tapered portion 24A, a collar 18AA and a stretchable upper 18B, with shaded line areas attached inseparably to indicate a thicker and stiffer weave pattern 18D for the construction of the fabric upper 18.

[0125] For example, to illustrate the above-mentioned objectives of the present invention, the following table provides growth patterns of children plotted relative to age:

[0126] Table 1

[0127] Table 2 Reference Figure 15A and Figure 15BAs shown in Tables 1 and 2 above, the extended study 102 of the sole 16 indicates that most growth occurs in the foretoe region, and the width growth is not proportional to the length growth. This helps the inventors group sizes together in 102A and create different series of expandable shoes 01 according to the present invention. Based on this study, customized foot sizes were also created to map the user's foot size, series, and actual length for use in the expandable shoe 01 of the present invention.

[0128] The unique structure and design of the sole 16 and upper 18 securely hug the user's foot, providing a perfectly shaped fit. The adaptability of the sole 16 and upper 18 of the Expandable Shoe 01 is like a glove, fitting snugly into any shape of foot. With its adaptable design, the Expandable Shoe 01 offers a perfect fit in only one size, accommodating sizes such as 9, 9.5, 10, and every size in between. The Expandable Shoe adapts to every foot and every pair of feet, unlike in other cases as with traditional shoes.

[0129] Therefore, refer to Figure 16 The scalable shoe 01 of this invention performs its function by expanding, allowing a single shoe to replace multiple pairs of traditional shoes. Most traditional shoes are primarily made of plastic and / or plastic-like materials. These petroleum-derived plastics (polyester, thermoplastic polyurethane (TPU), polyethylene terephthalate (PET), and ethylene-vinyl acetate (EVA)) have a large carbon footprint. Furthermore, only 5% of end-of-life shoes worldwide are reused, and 95% end up in landfills. The plastics / petroleum derivatives used in most athletic shoes do not decompose and remain in landfills for centuries. For example, as... Figure 16 As shown, a child aged 1-9 would require 15 pairs of traditional shoes. However, the same child will only need 5 pairs of the scalable shoe 01 of this invention during their 1-9 year period. This makes the invention sustainable and environmentally friendly, thereby reducing the number of shoes manufactured and resulting in a significant reduction in carbon footprint. The scalable shoe 01 and its packaging are made of environmentally friendly materials. It also saves users money and resources on Earth. Therefore, using the scalable shoe 01 of this invention, fewer shoes will end up in landfills. The environmentally friendly scalable shoe 01 is more sustainable, usable, and valuable in terms of money.

[0130] While this invention focuses on the use of expandable shoe 01 for infants and young children, the principles of the invention can also be applied to casual shoes / sandals worn by children older than 24 months or adults. It should be understood that the term "casual shoes / sandals for children" can be used in place of the term "infant shoes," thus all the unique features of the invention are also applied to expandable casual shoes for children.

[0131] The embodiments discussed above illustrate various design features of the inventive concept. It should be understood that the expandable shoe 01 of the present invention can be manufactured in any number of styles in men's, women's, or children's shoes. As shown, the shoe 01 can be laced or otherwise slid-on. The inventive concept is not limited to the exemplary shoe 01 shown, but is provided only for the purpose of defining a unique structure for the shoe 01, as it involves various components that enable the shoe to expand in length, width, and height by two or more shoe sizes as needed to accommodate feet of different sizes, from an unstretched, relaxed version.

[0132] The embodiments herein, along with their various features and advantageous details, are explained with reference to non-limiting examples in this specification. Descriptions of well-known components and processing techniques are omitted so as not to unnecessarily obscure the embodiments herein. This disclosure is intended only to facilitate an understanding of how the embodiments herein are practiced, and further to enable those skilled in the art to practice the embodiments herein.

[0133] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can readily modify and / or adapt such specific embodiments for different applications by applying present knowledge without departing from the general concept. Therefore, such adaptations and modifications should be understood as being within the meaning and scope of equivalent structures of the disclosed embodiments. It should be understood that the wording or terminology used herein is for descriptive purposes and not for limitation. Thus, although the embodiments herein have been described according to preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modifications within the spirit and scope of the embodiments described herein.

[0134] List of reference numerals in the attached diagram:

Claims

1. A scalable shoe that grows with the wearer's / user's foot, comprising: The upper and the expandable sole, having an upper surface and a lower surface, are designed to automatically adjust and comfortably adapt to the wearer's foot, resulting in increased comfort, usability, and delayed wear and tear. The sole has multiple flaps extending upwards from the lower surface of the sole around its periphery. The expandable shoe also includes an adjustment mechanism comprising multiple slits positioned within the flaps of the sole and spaced at predetermined intervals. These slits effectively alter the length and width of the expandable shoe, as well as its stability. Internal dimensions to provide a comfortable fit for the wearer / user; wherein the cuts include one or more cuts selected from the group consisting of: an inverted "Y" shaped cut with a guide round apex, a "V" shaped cut with a guide round apex, a straight cut with at least one guide round apex, a star-shaped cut with at least four guide round apexes, a wavy cut with at least one guide round apex, a pointed cut with at least one guide round apex, at least two micro-cuts on the top line of the sole, and at least one slit cut on the wall of the sole, wherein the guide round apexes are circular to avoid tearing and snagging of the flap.

2. The expandable shoe according to claim 1, wherein, The upper includes: a stretchable collar with omnidirectional expansion features and a collar tongue; an upper opening; a stretchable upper piece inseparably sewn / attached to the stretchable collar; a stretchable lower piece inseparably sewn / attached to the stretchable upper piece; and a stretchable thick, stiff woven pattern inseparably sewn / attached to the stretchable lower piece, wherein the stretchable thick, stiff woven pattern is further inseparably sewn / attached to the sides and bottom stabilization of the foot; wherein the stretchable lower piece is provided with multiple breathable ventilation holes, which help the feet wick away sweat when the user wears the expandable shoe; wherein a pull strap is inseparably attached to the upper at the rear of the expandable shoe; and wherein the upper is made of a stretchable, mesh, elastic woven material inserted into the sole, and the sole is inseparably attached to the flap surrounding the upper.

3. The expandable shoe of claim 1, wherein the sole has a sole top line of equal width configured to extend around the entire upper periphery of the sole, wherein the sole top line extends at varying depths on the left and right sides of the sole relative to the front and rear portions of the sole, and wherein the height of the sole top line on the front and rear portions of the sole is greater than its height on the left and right sides of the sole.

4. The expandable shoe according to claim 1, wherein, The sole has a uniform thickness and a tapered end facing the top line of the sole.

5. The expandable shoe according to claim 1, wherein, The sole has rib-shaped structural reinforcements on its inner and outer sides.

6. The expandable shoe according to claim 1, wherein, The sole has an elastomeric layer / stretchable midsole in its midsole section, which is glued or sandwiched between the lining of the sole and the upper.

7. The expandable shoe according to claim 1, wherein, The flaps are positioned in the front, side and rear of the sole.

8. The expandable shoe according to claim 1, wherein, The sole has a flexible V-shaped cut without any guide round vertices.

9. The expandable shoe of claim 1, wherein the upper comprises: The stretchable collar, elastic band, tongue, and stretchable upper are each sewn / connected together inseparably, wherein the stretchable upper is sewn / connected together inseparably to an expandable thick, stiff woven pattern having side and bottom stabilization for the foot.

10. The expandable shoe of claim 9, wherein a pull strap is inseparably attached to the stretchable collar on the front side, and another pull strap is attached to the upper on the rear side of the expandable shoe.

11. The expandable shoe according to claim 9, wherein, The stretchable upper has multiple breathable ventilation holes, which helps the feet wick away sweat when the user wears the stretchable shoe.

12. The expandable shoe according to claim 1, wherein, The sole is provided with a bottom line having sole claws.

13. The expandable shoe according to claim 1, wherein, The upper comprises lyocell fiber or merino wool and the sole comprises rubber or bio-TPU to withstand wear and tear from prolonged use and to provide comfort and protection.

14. The expandable shoe according to claim 1, wherein, The expandable shoe allows the foot to expand in the upward, longitudinal, and lateral directions to provide a comfortable fit.

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