Functional shoes that can help alleviate plantar fasciitis with windlass mechanism and reduce impact on spine and knee joints

Abstract

To provide a functional shoe that is capable of helping alleviation of plantar fascilitis and reducing an impact to the spine and knee joints by using a windlass mechanism that is capable of inducing a wearer's foot into a natural arch shape while changing to correspond to movement of the wearer's foot when wearer walks.SOLUTION: Provided is a functional shoe that includes: an outsole that flexes in response to bending of the wearer's foot when the wearer walks and supports the arch of the foot; and an upper connected to the outsole to support the instep of the wearer's foot; wherein the outsole includes: an arch support portion to support the arch of the wearer's foot; a first folding guide groove that guides the folding of the outsole when the wearer walks; and a second folding guide groove connected to the first folding guide groove for guiding the folding of the outsole when the wearer walks; the first and second folding guide grooves being each formed in a dome structure whose width gradually decreases along a concave direction from an outer surface of the outsole.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a functional shoe that uses a windlass mechanism to help relieve plantar fasciitis and reduce impact on the spine and knee joints. [Background technology]

[0002] Generally, the plantar fascia (Plantar aponeurosis) is formed on the sole of the foot, with two branches extending from the calcaneus toward the toes and attaching to the base of the toes.

[0003] The plantar fascia maintains the arch of the foot through a truss and windlass mechanism, and plays an important role in walking by helping to lift the foot when weight is placed on it as well as absorbing shock. On the other hand, plantar fasciitis can also occur in the foot, but plantar fasciitis tends to start near the heel bone and move forward along the sole of the foot.

[0004] More specifically, plantar fasciitis is a term used to describe pain in the proximal arch and heel, which occurs when the plantar fascia, which supports the longitudinal arch of the foot, is repeatedly subjected to micro-injury due to a variety of causes, which induces degeneration of the collagen that makes up the fascia and causes inflammation.

[0005] The pain caused by plantar fasciitis starts from the heel and spreads towards the forefoot as the condition worsens. If the condition becomes chronic, the persistent incorrect walking pattern can cause imbalances in the body as well as have a major impact on the knee joints and spine.

[0006] To solve this problem, functional shoes that support the arch of the foot have been developed in the past. However, such shoes only support the arch of the foot when the foot is not moving, and are unable to fit the foot completely when walking. As a result, the effect of reducing pain and fatigue caused by plantar fasciitis is very minimal.

[0007] In addition, conventional functional shoes cannot bend in accordance with the shape of the wearer's foot when walking, so the wearer cannot bend the foot completely when walking. As a result, the natural arch of the foot cannot be maintained, which can worsen the plantar fascia or have a negative effect on the knee joint and spine. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Registered Patent Publication No. 10-2226475 Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention has been devised to solve the above problems, and the object of the present invention is to provide a functional shoe that helps relieve plantar fasciitis and reduces impact on the spine and knee joints by using a windlass mechanism that can adjust to the movement of the wearer's foot while the wearer walks and guide the wearer's foot into the natural arch shape of the foot. The objects of the present invention are not limited to those mentioned above, and other objects not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0010] To solve the above problems, a functional shoe that is useful for alleviating plantar fasciitis and reduces impact on the spine and knee joints using a windlass mechanism according to an embodiment of the present invention is a functional shoe that allows a wearer to bend the instep when walking, and includes an outsole that supports the sole of the foot and supports the arch of the foot by bending in response to the bending of the wearer's foot when the wearer walks, and an upper that is connected to the outsole and supports the instep, and the outsole has an arch support portion that is protrudingly formed on an upper surface of the outsole and supports the arch of the wearer's foot, and a front The outsole includes a first fold guide groove formed in a plurality of grooves on a bottom surface of the outsole along a length direction thereof to guide the outsole to fold when a wearer walks, and a second fold guide groove formed in a plurality of grooves on a side surface of the outsole along a length direction thereof to be connected to the first fold guide groove and guide the outsole to fold when a wearer walks, and the first fold guide groove and the second fold guide groove are each formed in a dome structure whose width gradually decreases along a direction recessed from an outer surface of the outsole.

[0011] The outsole may further include a buffer groove recessed into a bottom surface of the outsole to support and distribute a load transmitted through the foot, the buffer groove being recessed to a depth deeper than the first fold guide groove and the second fold guide groove and having a dome structure whose width gradually decreases along a recessed direction from an outer surface of the outsole.

[0012] The buffer groove may include a first buffer groove that supports and distributes a load applied from the heel, and a second buffer groove that extends from the first buffer groove in a length direction of the outsole and supports and distributes a load applied from the arch of the foot, the first buffer groove having a width greater than that of the second buffer groove, and the second buffer groove having a length greater than that of the first buffer groove.

[0013] The outsole may further include a water film prevention groove formed on a bottom surface of the outsole to a depth shallower than the first fold guide groove and the second fold guide groove, and the water film prevention groove may be disposed to cross the first fold guide groove.

[0014] The outsole may further include a sole receiving groove formed in an upper surface of the outsole by being recessed to a predetermined depth and receiving a portion of the sole, and an edge support portion supporting an edge of the heel received in the sole receiving groove.

[0015] The outsole may further include a support frame that is accommodated inside the outsole and supports the arch support portion and the edge support portion, a first buffer cushion that is accommodated inside the outsole and supported by a part of the support frame to support and distribute a load applied from the heel, and a second buffer cushion that is accommodated inside the outsole and supported by another part of the support frame to support and distribute a load applied from the arch of the foot, and the first buffer cushion and the second buffer cushion may each include an air pouch supported by the support frame and filled with air, a spherical buffer cell that is accommodated inside the air pouch and made of an elastic material, and a valve unit that is coupled to the air pouch and configured to inject and exhaust air into and from the air pouch.

[0016] The outsole may further include an interference pad made of a silicon material that is accommodated inside the outsole and supports and distributes the load transmitted through the big toe during walking.

[0017] The upper is detachably connected to the outsole, and the outsole may further include a press-in groove into which an end of the upper is pressed, a nut member housed inside the outsole, and an upper fixing bolt that passes through the outsole and a portion of the upper that is pressed into the press-in groove and is fastened to the nut member.

[0018] The upper may further include a gap adjustment cushion that is accommodated inside the upper and adjusts a gap between an inner surface of the upper and the instep as it expands or contracts to fit the upper to the instep, and the gap adjustment cushion may include a gap adjustment pouch having a first air cell formed therein and a second air cell separated from the first air cell and disposed above the first air cell, a first gap adjustment valve unit coupled to the gap adjustment pouch and configured to inject and exhaust air into and from the first air cell, and a second gap adjustment valve unit coupled to the gap adjustment pouch and configured to inject and exhaust air into and from the second air cell.

[0019] The outsole may further include an anti-slip cap detachably coupled to a bottom surface of the outsole, and the anti-slip cap may include a bent hook portion detachably coupled to an incision groove formed on the bottom surface of the outsole, a support plate disposed between the hook portions and supported on the bottom surface of the outsole, a hook protrusion formed on an inner surface of the support plate and inserted into the bottom surface of the outsole, and an anti-slip pad detachably coupled to the support plate and supported on an outer surface of the support plate. Effect of the Invention

[0020] According to an embodiment of the present invention, the bottom surface and the side surface of the outsole are each formed with a folding guide groove, so that the wearer's foot can be guided into the natural arch shape of the foot when the wearer walks, thereby minimizing the burden of plantar fasciitis.

[0021] In addition, a dome-structured buffer groove is formed on the bottom surface of the outsole to distribute the load applied vertically from the heel and arch of the wearer, so that pressure points are not concentrated on the heel and toes but are distributed over the entire sole of the foot, thereby minimizing the impact applied to the ankle joint, knee joint, and spine.

[0022] The effects of the present invention are not limited to the above-mentioned examples, and various other effects are included within the scope of the present invention. [Brief description of the drawings]

[0023] [Figure 1] 1 is a side view showing a functional shoe according to an embodiment of the present invention. [Diagram 2] 1 is a bottom view showing a functional shoe according to an embodiment of the present invention. [Diagram 3] FIG. 4 is a cross-sectional view showing a buffer groove according to an embodiment of the present invention. [Figure 4] FIG. 4 is a vertical cross-sectional view showing a buffer groove according to an embodiment of the present invention. [Diagram 5] 1 is a plan view showing a state in which a shock absorbing pad according to an embodiment of the present invention is coupled to an outsole; [Figure 6] 1 is a longitudinal sectional view showing a state in which a support frame according to an embodiment of the present invention is disposed inside an outsole. [Figure 7] 4 is a cross-sectional view showing a state in which a shock-absorbing cushion is coupled to a support frame according to an embodiment of the present invention; FIG. [Figure 8] 1 is a cross-sectional view showing a cushion according to an embodiment of the present invention. [Figure 9] 2 is a diagram illustrating a combination structure of an upper and an outsole according to an embodiment of the present invention. FIG. [Figure 10] 1 is a cross-sectional view showing a gap adjustment cushion according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Hereinafter, the embodiments will be described in detail with reference to the attached drawings. However, since various modifications can be made to the embodiments, the scope of the patent application is not limited to these embodiments. It should be understood that all modifications, equivalents, or alternatives to the embodiments are included in the scope of the patent.

[0025] The specific structural or functional description of the embodiments is disclosed for the purpose of illustration only, and may be modified and embodied in various forms. Therefore, the embodiments are not limited to the specific disclosed forms, and the scope of the present specification includes modifications, equivalents, or alternatives within the technical spirit.

[0026] Although terms such as first or second are used to describe various components, such terms should be interpreted only for the purpose of distinguishing one component from another component. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component.

[0027] When an element is referred to as being "coupled" to another element, it may be directly coupled or connected to the other element, but it should be understood that there may be other elements in between.

[0028] The terms used in the examples are merely used for the purpose of explanation and should not be interpreted as being limiting. A singular expression includes a plural expression unless the context clearly indicates otherwise. In this specification, the terms "include" or "have" and the like specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof described above in the specification, and should be understood not to preclude the presence or additional possibility of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0029] Unless otherwise defined, all terms, including technical or scientific terms, used herein have the same meaning as commonly understood by a person of ordinary skill in the art to which the embodiments pertain. Terms defined in commonly used dictionaries should be interpreted to have a meaning consistent with the meaning they have in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

[0030] In addition, in the description with reference to the accompanying drawings, the same components are given the same reference numerals regardless of the drawing numerals, and the duplicated description thereof will be omitted. In describing the embodiments, if it is determined that a detailed description of related publicly known technology may make the gist of the embodiments unclear, the detailed description thereof will be omitted.

[0031] The advantages and features of the present invention, as well as the methods for achieving them, will become apparent from the following detailed description of the embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and may be embodied in various different forms. However, the embodiments are provided to complete the disclosure of the present invention, and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the claims.

[0032] In the embodiments of the present invention, unless otherwise defined differently, all terms, including technical or scientific terms, used herein have the same meaning as commonly understood by a person having ordinary skill in the art to which the present invention belongs. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning they have in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly defined in the embodiments of the present invention.

[0033] The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are illustrative, and the present invention is not limited to the illustrated matters. In addition, when describing the present invention, if it is determined that a specific description of related known technology may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. When "including," "having," "consisting of," etc. are used in this specification, other parts may be added as long as "only" is not used. When a component is expressed in the singular, it includes the plural unless otherwise expressly specified.

[0034] When interpreting elements, they are interpreted as including a margin of error even if there is no explicit statement to the contrary.

[0035] If the description is about a positional relationship, for example when the positional relationship between two parts is described using "on top of", "on top of", "on bottom of", "beside", etc., one or more other parts may be located between the two parts, as long as "immediately" or "directly" is not used.

[0036] When elements or layers are referred to as "on" another element or layer, this includes all cases where the element or layer is directly on top of or between other layers or elements. Like reference numbers refer to like elements throughout the specification.

[0037] The positions and thicknesses of the components shown in the drawings are shown for convenience of explanation, and the present invention is not necessarily limited to the sizes and thicknesses of the components shown in the drawings.

[0038] The respective features of the various embodiments of the present invention may be partially or wholly combined or combined with each other, and various technical interlocking and driving are possible as will be fully understood by those skilled in the art, and each embodiment may be implemented independently of each other or may be implemented together in a linked relationship.

[0039] FIG. 1 is a side view showing a functional shoe according to an embodiment of the present invention, and FIG. 2 is a bottom view showing a functional shoe according to an embodiment of the present invention.

[0040] Referring to Figures 1 and 2, a functional shoe 1000 (hereinafter referred to as "functional shoe 1000") that uses a windlass mechanism according to an embodiment of the present invention to help relieve plantar fasciitis and reduce impact on the spine and knee joint does not restrict the instep of the wearer's foot when walking, but allows the instep to bend, allowing for natural walking, and continuously supports the arch of the foot when walking.

[0041] The functional shoe 1000 is configured to naturally guide the arch of the foot during walking.

[0042] The functional shoe 1000 includes an outsole 1 and an upper 2 .

[0043] The outsole 1 is configured to support the sole of the foot and to support the arch of the foot while being bent in response to bending of the foot when the wearer walks.

[0044] The outsole 1 may be made of an EVA material having flexibility and cushioning properties.

[0045] For example, the outsole 1 may be formed to have a height of at least 4 cm. However, the height of the outsole 1 is not necessarily limited to this, and may be changed to various heights.

[0046] The outsole 1 includes an arch support portion 11 .

[0047] The arch support portion 11 is formed on the upper surface of the outsole 1 to protrude therefrom, and has a bulging protruding structure so as to support the arch of the wearer's foot.

[0048] The arch support portion 11 may have a curved shape in both the length direction and the width direction of the outsole 1 .

[0049] In addition, the outsole 1 may further include a first fold guide groove 12 and a second fold guide groove 13 . A plurality of first folding guide grooves 12 are formed on the bottom surface of the outsole 1 along the length direction of the outsole 1, and guide the folding of the outsole 1 when the wearer walks.

[0050] The second folding guide grooves 13 are formed in a plurality of portions on the side surface of the outsole 1 along the length direction of the outsole 1 and are connected to the first folding guide grooves 12, and guide the folding of the outsole 1 when the wearer walks.

[0051] In this case, the first fold guide groove 12 and the second fold guide groove 13 are each formed in a dome structure whose width gradually decreases along a direction in which the groove is recessed from the outer surface of the outsole 1 .

[0052] Here, the cross-sectional shape of the dome structure may be formed in an arch or wedge shape.

[0053] The outsole 1 may further include a cushioning groove 14 .

[0054] The buffer groove 14 is recessed into the bottom surface of the outsole 1 and is capable of supporting and dispersing the load transmitted through the foot.

[0055] FIG. 3 is a cross-sectional view showing a buffer groove according to an embodiment of the present invention, and FIG. 4 is a vertical-sectional view showing a buffer groove according to an embodiment of the present invention.

[0056] 3 and 4, the buffer groove 14 is recessed to a greater depth than the first fold guide groove 12 and the second fold guide groove 13, and may be formed in a dome structure whose width gradually decreases along the recessed direction from the outer surface of the outsole 1.

[0057] Here, the dome structure may be formed so that its cross-sectional shape is arched or wedge-shaped.

[0058] 2 and 4, the buffer groove 14 may include a first buffer groove 141 and a second buffer groove 142.

[0059] The first buffer groove 141 can support and distribute the load applied from the heel.

[0060] The first buffer groove 141 may be formed to have a width greater than that of the second buffer groove 142 but a length shorter than that of the second buffer groove 142 .

[0061] The second buffer groove 142 extends from the first buffer groove 141 in the length direction of the outsole 1 and can support and distribute the load applied from the arch of the foot.

[0062] The second buffer groove 142 may be formed to have a length greater than that of the first buffer groove 141 but a width smaller than that of the first buffer groove 141 .

[0063] Referring to FIG. 2, the outsole 1 may further include a water film prevention groove 15.

[0064] The water film prevention groove 15 may be formed on the bottom surface of the outsole 1 to be recessed to a shallower depth than the first fold guide groove 12 and the second fold guide groove 13 .

[0065] This can prevent the outsole 1 from slipping due to the water film. The water film prevention groove 15 may be disposed so as to intersect with the first folding guide groove 12 . Thereby, the water film prevention grooves 15 can be uniformly disposed over the entire bottom surface of the outsole 1 .

[0066] 3 and 4, the outsole 1 may further include a sole accommodation groove 16 that is recessed to a predetermined depth on the upper surface of the outsole 1 to accommodate a portion of the sole of the foot, and an edge support portion 17 that supports the edge of the heel that is accommodated in the sole accommodation groove 16.

[0067] The upper 2 may be joined to the outsole 1 to support the instep.

[0068] The upper 2 may be made of the same material as the outsole 1 .

[0069] However, the upper 2 is not necessarily limited to this and can be made of a variety of materials.

[0070] Additionally, the upper 2 may be formed in a shape that encases a portion of the instep of the wearer's foot, or in a shape that encases the entire wearer's foot.

[0071] Additionally, the upper 2 may be formed with ventilation holes as required.

[0072] Additionally, upper 2 may be configured to support the back of the ankle or heel of the wearer.

[0073] In this case, a portion of the upper 2 supporting the back of the ankle or the heel of the wearer may be made of an elastic material or may be configured so that its length can be adjusted.

[0074] Additionally, the upper 2 may further include a removable inner skin.

[0075] However, the upper 2 is not limited to this, and may be modified into various forms.

[0076] Below, we will explain a functional shoe 1000 (hereinafter referred to as "functional shoe 1000 according to another embodiment of the present invention") that helps relieve plantar fasciitis and reduces impact on the spine and knee joints using a windlass mechanism according to another embodiment of the present invention.

[0077] Incidentally, for the sake of convenience, the respective components for describing the functional shoe 1000 according to another embodiment of the present invention will use the same drawing symbols used in describing the functional shoe 1000, and the same or duplicated descriptions will be omitted.

[0078] FIG. 5 is a plan view showing a state in which a shock absorbing pad according to an embodiment of the present invention is coupled to an outsole, FIG. 6 is a longitudinal cross-sectional view showing a state in which a support frame according to an embodiment of the present invention is arranged inside an outsole, and FIG. 7 is a transverse cross-sectional view showing a state in which a shock absorbing cushion is coupled to a support frame according to an embodiment of the present invention.

[0079] 5 to 7, the functional shoe 1000 according to another embodiment of the present invention may further include a support frame 3, a first cushioning cushion 4, and a second cushioning cushion 5.

[0080] The support frame 3 is housed inside the outsole 1 and can support the arch support portion 11 and the edge support portion 17 .

[0081] The support frame 3 may include a cover portion that supports the arch support 11 and a cup portion that supports the edge support 17 .

[0082] For example, the support frame 3 may be made of a plastic material having a certain elasticity.

[0083] The first shock absorbing cushion 4 is housed inside the outsole 1 and supported by a part of the support frame 3, and is capable of supporting and dispersing the load applied from the heel.

[0084] The second shock absorbing cushion 4 is housed inside the outsole 1 and supported by another part of the support frame 3, and is capable of supporting and dispersing the load applied from the arch of the foot.

[0085] FIG. 8 is a cross-sectional view showing a shock-absorbing cushion according to an embodiment of the present invention.

[0086] Referring to FIG. 8, the first cushioning cushion 4 and the second cushioning cushion 5 may each include an air pouch AP supported by a support frame 3 and filled with air, a spherical or elliptical cushioning cell SC made of an elastic material and housed inside the air pouch AP, and a valve unit VU connected to the air pouch AP and configured to inject and exhaust air into and from the air pouch AP.

[0087] In this case, the buffer cell SC may be made of a material that can be compressed when an external force is applied and then restored to its original state by elasticity. The valve unit VU may be exposed to the outside through the bottom side of the outsole 1. For example, the valve unit VU may be configured to open and close an internal flow path to allow air to be discharged and air pressure to be maintained, but may require a separate pump (not shown) to inject air.

[0088] Referring to FIG. 5, a functional shoe 1000 according to another embodiment of the present invention may further include a cushioning pad 6.

[0089] The shock absorbing pad 6 is made of a silicon material and is housed inside the outsole 1 to support and disperse the load transmitted through the big toe when walking.

[0090] For example, the lower surface of the cushioning pad 6 may be formed with a honeycomb structure.

[0091] FIG. 9 is a diagram illustrating a combination structure of an upper and an outsole according to an embodiment of the present invention.

[0092] Referring to FIG. 9, an upper 2 can be removably coupled to an outsole 1 .

[0093] This allows the user to selectively replace the upper 2 and the outsole 1 .

[0094] In this case, the outsole 1 may be configured to selectively fix the upper 2 thereto.

[0095] In detail, the outsole 1 may further include a push-in groove 18A into which an end of the upper 2 is pushed, a nut member 18B housed inside the outsole 1, and an upper fixing bolt 18C that passes through the outsole 1 and a portion of the upper 2 pushed into the push-in groove 18A and is fastened to the nut member 18B. For example, the nut member 18B and the upper fixing bolt 18C may be made of a plastic material.

[0096] FIG. 10 is a cross-sectional view that illustrates a gap adjustment cushion according to an embodiment of the present invention.

[0097] Referring to FIG. 10, a functional shoe 1000 according to another embodiment of the present invention may further include a gap adjustment cushion 7.

[0098] The gap adjusting cushion 7 is housed inside the upper 2 and can adjust the gap between the inner surface of the upper 2 and the instep as it expands or contracts, thereby allowing the upper 2 to fit closely to the instep.

[0099] Furthermore, the gap adjusting cushion 7 can adjust the gap between the inner surface of the upper 2 and the instep in stages.

[0100] In detail, the gap adjustment cushion 7 may include a gap adjustment pouch 71 having a first air cell 711 formed therein and a second air cell 712 separated from the first air cell 711 and positioned above the first air cell 711, a first gap adjustment valve unit 72 coupled to the gap adjustment pouch 71 and configured to inject and exhaust air into and from the first air cell 711, and a second gap adjustment valve unit 73 coupled to the gap adjustment pouch 71 and configured to inject and exhaust air into and from the second air cell 712.

[0101] For example, the first gap control valve unit 72 and the second gap control valve unit 73 are configured to open and close the internal flow paths, making it possible to exhaust air and maintain air pressure, but may require a separate pump (not shown) to inject air.

[0102] Meanwhile, although not shown in the drawings, the functional shoe 1000 according to another embodiment of the present invention may further include an anti-slip cap (not shown).

[0103] The anti-slip cap is detachably attached to the bottom surface of the outsole 1, and the surface can be subjected to an anti-slip treatment.

[0104] The non-slip cap may include a barb, a support plate, a hook projection, and a non-slip pad.

[0105] The hook portion is formed in a bent shape and can be detachably coupled to a cut groove formed on the bottom surface of the outsole 1 .

[0106] More specifically, the barb can be inserted into a cut groove formed in the bottom surface of the outsole 1 and supported by hanging on the inside of the outsole 1.

[0107] At this time, the cut groove formed on the bottom surface of the outsole 1 may be formed in a shape corresponding to the hook portion.

[0108] The hook portion may be composed of a vertical portion extending vertically from the support plate and a horizontal portion extending horizontally from the vertical portion and hooked on the outsole 1 for support.

[0109] In addition, the hook portion may further include an auxiliary hook portion that extends obliquely upward or downward from the end of the horizontal portion and is supported by hooking onto the inner surface of the outsole 1 so as not to be separated from the outsole 1 while walking.

[0110] The support plate can be disposed between the barbs and supported on the bottom surface of the outsole 1 .

[0111] In this case, the barb can be arranged on the edge of the support plate.

[0112] The hook projections are formed on the inner surface of the support plate and can be inserted into the bottom surface of the outsole 1 .

[0113] For example, the hook protrusion may include a support protrusion protruding in a linear form from the inner surface of the support plate, and a barb protruding in a wedge-shaped structure from the end of the support protrusion. That is, the hook protrusion may be formed in a mushroom shape and inserted into the bottom surface of the outsole 1 to be supported by hanging on the inner surface of the outsole 1.

[0114] The non-slip pad may be removably coupled to the support plate and supported on an outer surface of the support plate.

[0115] The anti-slip pad may have a surface coated with an anti-slip material or may have anti-slip grooves formed thereon, or the anti-slip pad itself may be made of an anti-slip material.

[0116] The rear surface of the anti-slip pad is coated with adhesive and adhered to the outer surface of the support plate, and each corner of the anti-slip pad may further be provided with a fastening hook that can penetrate the support plate and be connected to the support plate.

[0117] As described above, according to the embodiment of the present invention, the fold guide grooves are formed on the bottom surface and the side surface of the outsole 1, respectively, so that the wearer's foot can be guided into the natural arch shape of the foot when the wearer walks, thereby minimizing the burden of plantar fasciitis.

[0118] In addition, a dome-structured buffer groove 14 is formed on the bottom surface of the outsole 1 to distribute the load applied vertically from the heel and arch of the wearer, so that the pressure is not concentrated on the heel and toes but is distributed over the entire sole of the foot, thereby minimizing the impact applied to the ankle joint, knee joint, and spine.

[0119] Although the embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments, and may be modified in various ways without departing from the scope of the technical idea of ​​the present invention. Therefore, the disclosed embodiments of the present invention are for illustration purposes, not for limiting the technical idea of ​​the present invention, and the scope of the technical idea of ​​the present invention is not limited by these embodiments. Therefore, it should be understood that the above-described embodiments are illustrative and not limiting in all respects. The scope of protection of the present invention should be analyzed according to the following claims, and all technical ideas within the scope equivalent thereto should be analyzed as being included in the scope of the present invention.

[0120] Accordingly, other implementations, other embodiments, and equivalents of the claims are intended to be within the scope of the following claims. [Explanation of symbols]

[0121] 1000: Functional shoes 1: Outsole 11: Arch support 12: 1st bend guide groove 13:Second bending guide groove 14:Buffer groove 141: 1st buffer groove 142:Second buffer groove 15:Water film prevention groove 16: Sole of the foot accommodation groove 17: Edge support 18A: Closet groove 18B: Nut material 18C: Upper fixing bolt 2: Upper 3: Support frame 4: First cushion 5: Second cushion AP: Air pouch SC: Buffer cell VU: Valve unit 6: Cushioning pad 7: Gap adjustment cushion 71: Gap adjustment pouch 711: First air cell 712: 2nd air cell 72: First gap adjustment valve unit 73: Second clearance adjustment valve unit

Claims

1. A functional shoe that allows a wearer to bend the instep when walking, An outsole that supports the sole of the foot and supports the arch of the foot by bending in response to the bending of the wearer's foot when the wearer walks; an upper coupled to the outsole to support the instep; The outsole is An arch support portion that is formed on an upper surface of the outsole and supports the arch of the wearer's foot; A first folding guide groove is formed on a bottom surface of the outsole along a longitudinal direction of the outsole, and guides folding of the outsole when a wearer walks; a second folding guide groove formed on a side surface of the outsole along a length direction of the outsole, connected to the first folding guide groove, and configured to guide folding of the outsole when a wearer walks; The first and second fold guide grooves are each formed in a dome structure in which the width gradually decreases along a concave direction from the outer surface of the outsole, forming a windlass mechanism that helps relieve plantar fasciitis and reduces impact on the spine and knee joints.

2. The outsole is The outsole further includes a buffer groove formed in a recessed manner on a bottom surface thereof to support and distribute a load transmitted through the foot, 2. The functional shoe according to claim 1, wherein the buffer groove is formed in a dome structure having a width that gradually decreases along a direction in which the buffer groove is recessed from an outer surface of the outsole to a depth deeper than the first fold guide groove and the second fold guide groove, and the windlass mechanism is useful for relieving plantar fasciitis and reducing impact on the spine and knee joint.

3. The buffer groove is A first buffer groove that supports and distributes a load applied from the heel; a second buffer groove extending from the first buffer groove in a length direction of the outsole to support and distribute a load applied from an arch of the foot; The first buffer groove has a width greater than that of the second buffer groove, 3. The functional shoe according to claim 2, which is useful for relieving plantar fasciitis and reduces impact on the spine and knee joints, using a windlass mechanism to help relieve plantar fasciitis.

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