Removable shoe sole

Abstract

The present invention relates to a detachable shoe sole for a shoe. The detachable shoe sole for a shoe according to an embodiment of the present invention includes a recess formed in an upper surface and configured to allow a midsole of a shoe to be inserted therein, a protrusion formed in a portion corresponding to a heel of the shoe with reference to installation in the shoe and configured to protrude more rearward than a heel portion of the shoe, and at least one groove portion formed in a bottom surface in a shape recessed upward.

Description

Technical Field

[0001] This invention relates to a shoe sole, and more specifically, to a sole that can be detached from a shoe. Background Technology

[0002] There is a type of splint-shaped shoe known for use by patients with foot or leg injuries, also known as a leg brace. Due to the splint-like nature of these shoes, which immobilize the foot or leg, they are suitable for continuous wear, both indoors and outdoors.

[0003] Therefore, a sole with a structure that can be detachably attached to a shoe in the form of a cleat is known (see Patent Document 1). Accordingly, the sole can be installed or removed depending on the usage environment, allowing for continuous activity without removing the cleat-shaped shoe even when the usage environment changes. For example, outdoor activities can be conducted with the sole installed, while indoor activities can be conducted simply by removing the sole without removing the cleat-shaped shoe.

[0004] On the other hand, in existing splint-type shoes, removing the installed sole requires pressing down on the sole by hand before pulling the foot out. However, for patients wearing splint-type shoes, bending the leg may be impossible or difficult. Furthermore, removing or installing the sole in this way requires direct handling of the shoe or sole by hand, which may raise hygiene concerns.

[0005] [Existing technical documents] [Patent Literature] Korean Patent Registration Publication No. 10-1694792 (January 4, 2017) Summary of the Invention

[0006] The technical problem to be solved by the invention The purpose of this invention is to solve the problems of the prior art described above.

[0007] The purpose of this invention is to provide a shoe sole that improves the ease of assembly and disassembly and allows for hygienic assembly and disassembly.

[0008] Furthermore, the purpose of this invention is to provide a shoe sole that can reduce the impact on the foot during walking.

[0009] means for solving technical problems The representative structure of the present invention for achieving the above objectives is as follows.

[0010] According to an embodiment of the present invention, a detachable sole for attaching to a shoe includes: a recess formed on the upper surface for inserting a midsole of the shoe; a protrusion formed on a portion corresponding to the heel of the shoe, based on the shoe being attached, and configured to protrude further rearward than the heel portion of the shoe; and at least one groove formed on the bottom surface in a shape recessed to the upper side.

[0011] According to one embodiment of the present invention, the bottom surface may have an arc shape along the length direction when viewed from the side.

[0012] According to one embodiment of the present invention, at least one groove may be formed to open rearward and communicate with the outside while the bottom surface is in contact with the ground.

[0013] According to one embodiment of the present invention, the inner sidewall of the recess may have a locking portion that engages with the outer peripheral surface of the midsole.

[0014] According to one embodiment of the present invention, the engaging portion may include a plurality of engaging holes formed along the periphery of the inner sidewall of the recess, the plurality of engaging holes being configured to engage with a plurality of engaging protrusions formed on the outer peripheral surface of the midsole.

[0015] According to one embodiment of the present invention, the upper surface of the recess may be formed with undulations along the length direction.

[0016] A shoe according to an embodiment of the present invention includes: a protective portion formed to wrap around at least a portion of a user's leg; a sole portion connected to the protective portion and formed to support the user's foot; a midsole disposed on the lower part of the sole portion; and a sole configured to be detachable from the midsole. Here, the sole includes: a recess formed on the upper surface for insertion of the shoe's midsole; a protrusion formed on a portion corresponding to the heel of the shoe, configured to protrude further rearward than the heel portion; and at least one groove formed on the bottom surface in a shape recessed upward.

[0017] Furthermore, the sole and the shoe including the sole of the present invention may include other additional structures without prejudice to the technical concept of the present invention.

[0018] Invention Effects According to one embodiment of the present invention, the sole of a shoe can be removed by pulling the foot out of the shoe while pressing the protrusion with the other foot, allowing even patients with limited mobility to easily remove the sole. Furthermore, the sole can be removed hygienically without the need for the use of hands.

[0019] Furthermore, according to one embodiment of the invention, since the bottom surface of the sole is curved, it can reduce the impact on the legs during walking. Attached Figure Description

[0020] Figure 1 This is an illustrative diagram showing the combined structure of a shoe and sole based on an embodiment of the present invention.

[0021] Figure 2 This is a diagram showing a shoe sole based on an embodiment of the present invention.

[0022] Figure 3 This is a diagram showing the bottom surface of a shoe sole based on an embodiment of the present invention.

[0023] Figure 4 This is a diagram showing a vertical cross-section of a shoe sole based on an embodiment of the present invention.

[0024] Figure 5 This is a diagram showing the state of the sole and shoe combined according to an embodiment of the present invention.

[0025] Figure 6 This is a diagram showing the state of the sole being removed from the shoe according to an embodiment of the present invention.

[0026] Figure 7 This is a diagram illustrating the walking state when using a shoe sole based on an embodiment and a comparative example of the present invention.

[0027] Figure 8 The graphs show the simulation results of walking when using a shoe sole based on an embodiment and a comparative example of the present invention.

[0028] [Symbol Explanation] 100: Shoe sole 110: concave part 120: Protrusion 130: Stop section 140: Engagement hole 200: Shoes 210: Protection Department 220: Base plate section 230: Midsole 231: A piercing protrusion 240: Shoe Toe Detailed Implementation

[0029] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Where it is deemed that this might unnecessarily obscure the spirit of the present invention, specific descriptions of known functions and structures will be omitted.

[0030] It should be understood that the terminology used in this invention is for illustrative purposes only and is not intended to limit the invention. For example, unless the context explicitly indicates that it refers only to the singular, a constituent element expressed in the singular should be understood to include multiple constituent elements. Terms such as "comprising" or "having" as used in this invention are only used to specify the presence of features, numbers, steps, actions, constituent elements, components, or combinations thereof described in this invention, and are not intended to exclude the possibility of having or adding one or more other features, numbers, steps, actions, constituent elements, components, or combinations thereof by using these terms.

[0031] Unless otherwise defined in this specification, all terms used in this invention, including technical or scientific terms, shall have the same meaning as commonly understood by those skilled in the art. Terms as defined in commonly used dictionaries shall be interpreted as having a meaning consistent with the context of the relevant art, and it should be understood that they should not be interpreted in an overly restrictive or exaggerated manner unless expressly defined otherwise in this invention.

[0032] Throughout the specification, identical or similar reference numerals are used to denote the same constituent elements. Furthermore, the sizes, thicknesses, and positions of the components shown in the figures are arbitrarily or exaggerated for ease of explanation; therefore, the invention is not necessarily limited to what is shown in the figures. That is, it should be understood that specific shapes, structures, and features described in the specification can be implemented by changing one embodiment to other embodiments without departing from the spirit and scope of the invention, and the position or arrangement of individual constituent elements can also be changed without departing from the spirit and scope of the invention.

[0033] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0034] Figure 1 This is an illustrative diagram showing the combined structure of a shoe and sole based on an embodiment of the present invention.

[0035] refer to Figure 1 According to one embodiment of the present disclosure, the shoe 200 is a plate-shaped shoe, which may include a protective part 210, a sole part 220, a midsole 230, and a toe 240. The illustrated embodiment shows the shoe 200 as a plate-shaped shoe, that is, an example of so-called leg protection, but the present invention is not limited thereto. It should be understood that the sole 100 according to an embodiment of the present invention can be applied not only to leg protection, but also to shoes of various shapes.

[0036] According to an embodiment of the present invention, the protective portion 210 of a shoe 200 performs the function of fixing and protecting the leg. For this purpose, the protective portion 210 has a shape that covers at least a portion of the leg, such as at least a portion of the side and rear of the leg.

[0037] According to an embodiment of the present invention, the sole plate portion 220 of the shoe 200 performs the function of fixing and supporting the foot. In one embodiment, the sole plate portion 220 is integrally formed with the protective portion 210 and is made of the same material as the protective portion 210.

[0038] According to an embodiment of the present invention, the midsole 230 of a shoe 200 is disposed at the lower part of the sole plate 220 to perform the function of absorbing impact during walking. According to an embodiment of the present invention, in order to perform the function of absorbing impact and distributing load, the midsole 230 may be made of a softer material than the sole plate 220. The midsole 230 may be made of, for example, EVA (Ethylene Vinyl Acetate), urethane, PU (Polyurethane), foam, rubber, etc.

[0039] In one embodiment, at least one upward-facing protrusion may be formed on at least a portion of the midsole 230, and at least one hole corresponding to the at least one protrusion may be formed on the sole plate portion 220, thereby enabling a connection in which the protrusion of the midsole 230 is inserted into the hole of the sole plate portion 220. At least one protrusion of the midsole 230 may be formed on the heel portion when the shoe 200 is worn. This reduces the impact applied to the heel portion during walking.

[0040] On the other hand, the surfaces of the midsole 230 and the base plate 220 that face each other, namely the upper surface of the midsole 230 and the lower surface of the base plate 220, can be firmly bonded together by an adhesive.

[0041] According to an embodiment of the present invention, the toe 240 of a shoe 200 is formed in a shape that wraps around the toes from above, performing the function of protecting the toes from external impacts. The toe 240 may be configured to be detachably disposed on the upper front part of the sole plate portion 220, so that it can be removed when needed.

[0042] According to one embodiment of the present invention, the sole 100 can be detachably coupled to the shoe 200. Specifically, the shoe 200 can be coupled to the sole 100 by inserting the midsole 230 of the shoe 200 into a recess formed on the upper surface of the sole 100. In one embodiment, the sole 100 is configured to wrap around the midsole 230 from the lower part and is detachable from it.

[0043] Figure 2 This is a diagram showing a shoe sole based on an embodiment of the present invention.

[0044] refer to Figure 2The sole 100 includes a recess 110 formed on its upper surface and configured for insertion of the midsole 230 of the shoe 200. As described above, the sole 100 can be installed by inserting the midsole 230 of the shoe 200 into the recess 110 of the sole 100.

[0045] According to one embodiment of the present invention, the inner sidewall of the recess 110 of the sole 100 may have a engaging portion that engages with the outer peripheral surface of the midsole 230. In one embodiment, a plurality of engaging protrusions 231 may be formed on the outer peripheral surface of the midsole 230, and a plurality of engaging holes 140 may be formed on the sole 100 at positions corresponding to the engaging protrusions 231 of the midsole 230.

[0046] According to one embodiment of the present invention, an undulating portion may be formed along the length direction on the upper surface of the recess 110 of the sole 100. In one embodiment, a first undulating portion 232 may be formed on the lower surface of the midsole 230 of the shoe 200, and a second undulating portion 111 with a shape corresponding to the first undulating portion 232 of the midsole 230 may be formed on the upper surface of the recess 110 of the sole 100. Thus, when the midsole 230 is engaged with the sole 100, the engaging protrusion 231 is inserted into the engaging hole 140, and at the same time, the first undulating portion 232 of the midsole 230 may slide on the undulating shape of the second undulating portion 111 of the sole 100 and be placed in an accurate position.

[0047] According to one embodiment of the present invention, the sole 100 may be made of a stretchable material, such as EVA, urethane, PU, ​​foamed sponge, rubber, etc.

[0048] Thus, both the midsole 230 and the sole 100 are made of a flexible, soft material. Therefore, when the midsole 230 is inserted into the sole 100, the engaging protrusions 231 of the midsole 230 can enter the inner side of the recess 110 and be inserted into the engaging holes 140 formed at positions corresponding to the engaging protrusions 231. It should be understood that the shape and number of the engaging protrusions 231 and the engaging holes 140 are not limited to those shown in the figure, but can be modified in consideration of factors such as holding power and ease of removal.

[0049] According to one embodiment of the present invention, the sole 100 may be made of a softer material than the midsole 230. Thus, when the midsole 230 is attached to the sole 100, the sole 100 opens up, facilitating insertion of the midsole 230; and when the sole 100 is separated, it bends flexibly, allowing for easy separation. However, alternatively, the midsole 230 and the sole 100 may be formed of the same material.

[0050] According to one embodiment of the present invention, the sole 100 may include a protrusion 120. The protrusion 120 may be formed in a portion corresponding to the heel of the shoe 200, with reference to when the sole 100 is mounted on the shoe 200, and configured to protrude further rearward than the heel portion of the shoe 200. Through the protrusion 120, the wearer can easily remove the sole 100 from the midsole 230 without using their hands. This will be described in detail later.

[0051] According to one embodiment of the present invention, the sole 100 may include a stop portion 130. The stop portion 130 is capable of assisting in easy alignment when the sole 100 is attached to the shoe 200. In one embodiment, the stop portion 130 may be formed in a portion corresponding to the front (e.g., toe portion) of the shoe 200, with reference to when the sole 100 is mounted on the shoe 200, and configured to protrude upwards beyond the rest of the upper surface of the sole 100. With the front of the shoe 200 resting against the stop portion 130, the wearer can conveniently attach the sole 100 to the shoe 200 in a standing position by inserting the midsole 230 into the recess 110.

[0052] Figure 3 This is a diagram showing the bottom surface of a shoe sole according to an embodiment of the present invention. Figure 4 This is a diagram showing a vertical cross-section of a shoe sole based on an embodiment of the present invention. Hereinafter, reference will be made to... Figure 3 and Figure 4 The structure of the bottom surface of the sole 100 based on an embodiment of the present invention will be described in detail.

[0053] According to one embodiment of the present invention, in order to prevent slipping, an anti-slip component 150 may be formed on the bottom surface of the sole 100. With this anti-slip component 150, the grip can be improved when the sole 100 is mounted on the shoe 200 for activities.

[0054] In the illustrated embodiment, multiple anti-slip components 150 with different orientations are formed on the bottom surface of the sole 100, thus preventing slippage regardless of the direction in which force is applied. Furthermore, each anti-slip component 150 is separated from the others by a predetermined gap. This prevents slippage of the sole 100 due to water film formation. Specifically, when walking on water, if the bottom surface is flat or the anti-slip component 150 is formed of a single structure, the load is widely distributed across the entire bottom surface, preventing water from draining quickly between the ground and the sole 100, potentially causing water film formation. As a result, the sole 100 loses traction and slips, potentially posing a risk of injury to the wearer. Conversely, in the case of the sole 100 based on an embodiment of the present invention, since the load is concentrated on each anti-slip component 150, water beneath the anti-slip components 150 can drain quickly through the gaps between them, thus preventing water film formation.

[0055] According to an embodiment of the present invention, a shoe sole 100 includes at least one groove formed on the bottom surface in an upwardly recessed manner. In the illustrated embodiment, three grooves (161, 162, 163) are formed on the bottom surface of the shoe sole 100.

[0056] Thus, at least one groove 163 formed in the groove on the bottom surface of the sole 100 can be configured to open rearward and communicate with the outside when the bottom surface of the sole 100 is in contact with the ground. Therefore, even when used on a smooth surface, it is possible to prevent the sole 100 from adhering to the ground due to a vacuum forming under it. Furthermore, when walking on water, it is possible to prevent water film formation caused by water trapped in the groove.

[0057] On the other hand, reference Figure 4 The sole 100 has a curved bottom surface when viewed from the side along its length (i.e., from the toes towards the heel). When a flat sole 100 is used on a shoe with a plywood-like design, it may put strain on the user's knees or other joints during walking; however, the sole 100 based on an embodiment of the present invention can alleviate this strain. This will be explained in detail later.

[0058] Figure 5 This diagram illustrates the state in which the sole and shoe are combined according to an embodiment of the present invention. Figure 6 This is a diagram showing the state of the sole being removed from the shoe according to an embodiment of the present invention.

[0059] refer to Figure 5According to an embodiment of the present invention, the protrusion 120 of the sole 100 can be formed in the portion corresponding to the heel of the shoe 200, with reference to when the sole 100 is mounted on the shoe 200, and configured to protrude further rearward than the heel portion of the shoe 200. For example, the rear end H1 of the sole 100 protrudes rearward to form the protrusion 120, which protrudes further rearward by a predetermined width (E) than the heel portion H2 of the shoe 200. As a result, the upper portion 121 of the protrusion 120 is exposed at the rear of the shoe 200.

[0060] refer to Figure 6 The wearer presses down on the upper part 121 of the exposed protrusion 120 with their other foot to fix the sole 100 to the ground, and then lifts their foot to remove the sole 100 from the midsole 230 of the shoe 200. At this time, since the sole 100 and / or the midsole 230 are made of elastic materials such as EVA, urethane, PU, ​​foam sponge, and rubber, the locking protrusion 231 of the midsole 230 can be easily removed from the locking hole 140 of the sole 100.

[0061] As described above, when the sole 100 is installed on the shoe 200 (for example, when moving from indoors to outdoors), the sole 100 is placed on the ground, and pressure is applied to the shoe 200 from above while only roughly aligned. The undulations formed in the recess 110 of the sole 100 guide the alignment, thereby placing the sole 100 into place and attaching it to the midsole 230. At this time, the position of the shoe 200 and the sole 100 can be adjusted more easily by using the stop 130. Even if the sole 100 is accidentally placed in an inconvenient position when placed on the ground, the position of the sole 100 can be adjusted by moving the stop 130 with the shoe.

[0062] Furthermore, when removing the sole 100 from the shoe 200 (for example, when moving from outdoors to indoors), the midsole 230 can be easily separated from the sole 100 while it is fixed to the ground via the protrusion 120. At this time, since a groove is formed on the bottom surface of the sole 100, a vacuum phenomenon can be prevented, thereby preventing the sole 100 from adhering to the ground.

[0063] Therefore, the sole 100 can be easily removed and installed without bending the waist or legs when moving indoors or outdoors, making it convenient even for patients with mobility impairments. Since the entire shoe 200 does not need to be removed, the splint effect can be maintained. Furthermore, because the sole 100 can be removed and installed without using hands, it can be used hygienically.

[0064] Figure 7 This is a diagram illustrating the walking state when using a shoe sole based on an embodiment and a comparative example of the present invention. Specifically, Figure 7Images (a) to (c) serve as comparative examples of the present invention, illustrating the walking posture when using a shoe with a flat sole. Figure 7 Images (d) to (f) illustrate the walking posture when using a shoe sole with an arcuate bottom surface according to an embodiment of the present invention. Furthermore, Figure 7 (a) and (d) show the state where the foot begins to touch the ground and the heel is in contact with the ground. Figure 7 Images (b) and (e) show the intermediate state of the middle portion of the sole contacting the ground. Figure 7 (c) and (f) show the state where the foot is off the ground and only the front part of the sole is in contact with the ground.

[0065] Figure 8 These are graphs illustrating the simulation results of walking using a sole based on an embodiment and a comparative example of the present invention, showing the effect on... Figure 7 The results of simulations were obtained regarding knee joint displacement, stress applied to the ankle, and reaction force during walking. Figure 8 The figure shows the simulation results of walking on a bottom surface made of iron material (elastic modulus 2.07 GPa) with an EVA material (elastic modulus 70 MPa) sole.

[0066] Figure 8 Figure (a) is a graph showing the results of a simulation of knee joint displacement. The horizontal axis represents the knee joint displacement along the walking direction, and the vertical axis represents the knee joint displacement in the direction perpendicular to the ground. (Reference) Figure 8 In (a), before the knee joint travels 150 mm in the walking direction, the vertical displacement does not show a significant difference, but after 150 mm, in the embodiment of the present invention, the vertical displacement is reduced by 17.5% compared to the comparative example.

[0067] Figure 8 (b) is a graph showing the results of a simulation of the average equivalent (Von Mises) stress generated in the ankle region. The horizontal axis represents the knee joint displacement along the walking direction, and the vertical axis represents the average equivalent stress generated in the ankle region. Reference Figure 8 (b) In the sole of the shoe based on the embodiment of the present invention, the maximum value of the average stress is reduced by 50.1% compared with the comparative example.

[0068] As in Figure 8 As can be confirmed in (a) and (b), since the sole of the shoe based on an embodiment of the present invention has an arc-shaped bottom surface, the knee joint displacement is reduced and the load applied to the ankle is reduced compared to the flat case, thus enabling more comfortable and stable walking.

[0069] Figure 8Figure (c) is a graph showing the results of a simulation of the vertical reaction force after unloading the load from the sole. The horizontal axis represents walking time, and the vertical axis represents the vertical reaction force from the ground acting on the sole. The simulation of the vertical reaction force was performed as follows: after applying body weight and initial velocity for 500 ms, the time required for the foot to leave the ground during the transfer of body weight to the other foot was determined. At this point, it can be considered that the foot has left the ground at the time when the magnitude of the vertical reaction force becomes 0.

[0070] refer to Figure 8 (c) It was confirmed that after unloading the load, in the comparative example, the vertical reaction force reached zero in 49.63 ms, while in the embodiment of the present invention, the vertical reaction force reached zero in 39.48 ms. That is, it was confirmed that due to the curved bottom surface of the sole, the time required for the foot to leave the ground was reduced by 20.5%. This suggests that when a sole based on an embodiment of the present invention is used, the wearer's walking speed and walking convenience can be improved compared to when a sole based on the comparative example is used.

[0071] Thus, by constructing a sole with an arc-shaped bottom surface based on an embodiment of the present invention, especially when applied to shoes in the form of a cleat, i.e., so-called leg braces, not only can discomfort during walking be reduced and stable walking achieved, but walking speed can also be increased.

[0072] The present invention has been described above through specific constituent elements and limited embodiments. However, the above embodiments are only provided to help to understand the present invention more comprehensively. The present invention is not limited thereto. If one is skilled in the art, various modifications and variations can be made from such description.

[0073] Therefore, the concept of the present invention should not be limited to the previously described embodiments, but also to all contents that are equivalent or modified from the claims described below.

Claims

1. A detachable sole for attaching to a shoe, comprising: A recess is formed on the upper surface and serves as an insertion point for the shoe's midsole; The protrusion, based on the mounting on the shoe, is formed in the part corresponding to the heel of the shoe, and is configured to protrude further rearward than the heel part of the shoe; and At least one groove is formed on the bottom surface in a shape that is recessed to the upper side.

2. The sole according to claim 1, wherein, The bottom surface is curved along its length when viewed from the side.

3. The sole according to claim 1, wherein, The at least one groove is formed such that, with the bottom surface in contact with the ground, it opens rearward and communicates with the outside.

4. The sole according to claim 1, wherein, The inner wall of the recess has a engaging portion that engages with the outer peripheral surface of the midsole.

5. The sole according to claim 1, wherein, The engaging portion includes a plurality of engaging holes formed along the periphery of the inner sidewall of the recess, the plurality of engaging holes being configured to engage with a plurality of engaging protrusions formed on the outer peripheral surface of the midsole.

6. The shoe sole according to claim 1, wherein, The upper surface of the recess has undulations along its length.

7. A shoe comprising: The protective section is formed in such a way that it covers at least a portion of the user's legs; The base plate is connected to the protective part and forms a support for the user's feet; The midsole is located at the lower part of the base plate. and The sole is designed to be detachable from the midsole. The sole includes: A recess is formed on the upper surface and serves as an insertion point for the shoe's midsole; A protrusion, based on its installation in a shoe, is formed in the portion corresponding to the heel of the shoe, and is configured to protrude further rearward than the heel portion of the shoe; and At least one groove is formed on the bottom surface in a shape that is recessed to the upper side.

Images