Detachable outsole for shoe

Abstract

The present invention relates to a detachable outsole for a shoe. The detachable outsole for a shoe, according to one embodiment of the present invention, comprises: a recess part formed on the upper surface thereof such that a midsole of the shoe is inserted therein; a protrusion part formed at a portion corresponding to a heel of the shoe when mounted on the shoe, so as to protrude rearward beyond a heel portion of the shoe; and at least one groove part formed on the bottom surface thereof in a shape recessed upward.

Description

Removable soles for shoes

[0001] The present invention relates to a sole for a shoe, and more specifically, to a sole that is detachable from a shoe.

[0002] Splint-type shoes, so-called leg braces, are known for use by patients with foot or leg injuries. Due to the nature of these splint-type shoes as devices designed to immobilize the foot or leg, it is advisable to wear them at all times, regardless of the environment, whether indoors or outdoors.

[0003] To this end, a sole having a detachable structure for a splint-type shoe is known (see Patent Document 1). According to this, the sole can be attached or removed depending on the usage environment, making it possible to wear the splint-type shoe at all times and engage in activities without removing it, even if the usage environment changes. For example, one can engage in activities outdoors with the sole attached, and then engage in activities indoors by removing only the sole without removing the splint-type shoe.

[0004] Meanwhile, when removing the sole attached to conventional splint-type shoes, the sole must be pressed with the hand and the foot wearing the shoe removed. However, for patients wearing splint-type shoes, bending the leg may be impossible or difficult. Additionally, since the shoe or sole must be handled directly by hand when removing the sole in this manner, there may also be hygiene issues.

[0005] [Prior Art Literature]

[0006] [Patent Literature]

[0007] Registered Patent Publication No. 10-1694792 (2017.01.04.)

[0008] The present invention aims to solve the problems of the aforementioned prior art.

[0009] The purpose of the present invention is to provide a shoe sole that allows for hygienic removal and improved ease of attachment.

[0010] In addition, the present invention aims to provide a shoe sole capable of mitigating the impact applied to the foot during walking.

[0011] A representative configuration of the present invention for achieving the above objective is as follows.

[0012] A shoe sole detachable to a shoe according to one embodiment of the present invention comprises a concave portion formed on an upper surface and configured to allow the midsole of the shoe to be inserted, a protrusion formed on a portion corresponding to the heel of the shoe when mounted on the shoe and configured to protrude rearward from the heel portion of the shoe, and at least one groove formed on a bottom surface in a shape that is concavely recessed upward.

[0013] According to one embodiment of the present invention, the bottom surface may have a rounded shape along the length direction when viewed from the side.

[0014] According to one embodiment of the present invention, at least one groove may be formed so as to be open to the rear and communicate with the outside while the bottom surface is in contact with the ground.

[0015] According to one embodiment of the present invention, the inner wall of the concave portion may be provided with a fastening portion that is fastened to the outer surface of the midsole.

[0016] According to one embodiment of the present invention, the fastening portion includes a plurality of fastening holes formed along the inner wall perimeter of the concave portion, and the plurality of fastening holes may be configured to be coupled with a plurality of fastening protrusions formed on the outer surface of the midsole.

[0017] According to one embodiment of the present invention, the upper surface of the concave portion may have a curved portion formed along the longitudinal direction.

[0018] A shoe according to one embodiment of the present invention comprises a protective portion formed to wrap around at least a portion of a user's leg, a sole plate portion connected to the protective portion and formed to support the user's foot, a midsole provided at the lower part of the sole plate portion, and a sole detachably configured to be attached to the midsole. Herein, the sole comprises a concave portion formed on an upper surface and configured to allow the midsole of the shoe to be inserted, a protrusion portion formed on a portion corresponding to the heel of the shoe when mounted on the shoe and configured to protrude rearward from the heel portion of the shoe, and at least one groove portion formed on the bottom surface in a shape that is concavely recessed upward.

[0019] In addition to this, the sole according to the present invention and the shoe including the same may further include other additional configurations to the extent that the technical concept of the present invention is not compromised.

[0020] According to one embodiment of the present invention, the sole attached to the shoe can be removed by pulling the shoe out while pressing the protrusion with the opposite foot, allowing even patients with limited mobility to easily remove the sole. In addition, since hands are not required to be used when removing the sole, it can be used hygienically.

[0021] In addition, according to one embodiment of the present invention, the bottom surface of the sole has a rounded shape, so the impact applied to the leg during walking can be mitigated.

[0022] FIG. 1 is a drawing exemplarily illustrating a combined structure of a shoe and a sole according to one embodiment of the present invention.

[0023] FIG. 2 is a drawing showing a sole according to one embodiment of the present invention.

[0024] FIG. 3 is a drawing showing the bottom surface of a sole according to one embodiment of the present invention.

[0025] FIG. 4 is a drawing showing a vertical cross-section of a sole according to one embodiment of the present invention.

[0026] FIG. 5 is a drawing showing a state in which a sole according to one embodiment of the present invention is combined with a shoe.

[0027] FIG. 6 is a drawing showing the state in which a sole is removed from a shoe according to one embodiment of the present invention.

[0028] FIG. 7 is a drawing showing the walking state when using a sole according to one embodiment and a comparative example of the present invention.

[0029] FIG. 8 is a graph showing the results of a walking simulation when using a sole according to one embodiment and a comparative example of the present invention.

[0030] [Explanation of the symbol]

[0031] 100: Sole

[0032] 110: Concave part

[0033] 120: Protrusion

[0034] 130: Jaw area

[0035] 140: Fastening hole

[0036] 200: Shoes

[0037] 210: Protection Department

[0038] 220: Bottom plate

[0039] 230: Midsole

[0040] 231: Fastening protrusion

[0041] 240: Toe cap

[0042] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. In the following, specific descriptions of already known functions and configurations are omitted where it is determined that there is a risk of unnecessarily obscuring the essence of the present invention.

[0043] The terms used in this invention are used merely to describe specific embodiments and are not intended to limit the invention. For example, a component expressed in the singular should be understood as a concept including a plurality of components unless the context clearly implies only the singular. Terms such as "comprising" or "having" used in this invention are intended only to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in this invention, and the use of such terms is not intended to exclude the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0044] Unless otherwise defined in this specification, all terms used in this invention, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should be understood not to be interpreted as being overly limited or expanded unless explicitly defined otherwise in this invention.

[0045] Throughout the specification, identical or similar reference numerals are assigned to identical components. Furthermore, the size, thickness, location, etc., of each component shown in the drawings are depicted arbitrarily or exaggeratedly for the convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. That is, specific shapes, structures, and characteristics described in the specification may be modified from one embodiment to another without departing from the spirit and scope of the present invention, and it should be understood that the location or arrangement of individual components may also be modified without departing from the spirit and scope of the present invention.

[0046] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0047] FIG. 1 is a drawing exemplarily illustrating a combined structure of a shoe and a sole according to one embodiment of the present invention.

[0048] Referring to FIG. 1, a shoe (200) according to one embodiment of the present disclosure is a shoe in the form of a splint and may include a protective part (210), a sole part (220), a midsole (230), and a toe cap (240). In the illustrated embodiment, the shoe (200) is exemplified as a shoe in the form of a splint, so-called leg protector, but the present invention is not limited thereto, and it should be understood that the sole (100) according to one embodiment of the present invention can be applied not only to leg protectors but also to various types of shoes.

[0049] A protective portion (210) of a shoe (200) according to one embodiment of the present invention performs the function of fixing and protecting a leg. To this end, the protective portion (210) has a shape that wraps around at least a part of the leg, for example, at least a part of the side and rear portions of the leg.

[0050] A sole plate portion (220) of a shoe (200) according to one embodiment of the present invention performs the function of fixing and supporting the foot. In one embodiment, the sole plate portion (220) is formed integrally with a protective portion (210) and is formed of the same material as the protective portion (210).

[0051] According to one embodiment of the present invention, the midsole (230) of the shoe (200) is positioned below the sole plate (220) and performs the function of absorbing shock during walking. According to one embodiment of the present invention, the midsole (230) may be made of a material that is relatively softer than the sole plate (220) in order to perform the functions of shock absorption and load distribution. The midsole (230) may be made of, for example, EVA (Ethylene Vinyl Acetate), urethane, PU (Polyurethane), foamed sponge, rubber, etc.

[0052] In one embodiment, at least one protrusion may be formed facing upward on at least a portion of the midsole (230), and at least one hole corresponding to the at least one protrusion may be formed in the bottom plate (220), so that the protrusion of the midsole (230) can be inserted into the hole of the bottom plate (220) to form a connection. At least one protrusion of the midsole (230) may be formed on the heel portion when the shoe (200) is worn. Through this, the impact transmitted to the heel portion during walking can be mitigated.

[0053] Meanwhile, the mutually facing surfaces of the midsole (230) and the bottom plate (220), that is, the upper surface of the midsole (230) and the lower surface of the bottom plate (220), can be firmly joined by an adhesive.

[0054] A toe cap (240) of a shoe (200) according to one embodiment of the present invention is formed in a shape that wraps around the toes from the top and performs the function of protecting the toes from external impact. The toe cap (240) may be configured to be detachably attached to the upper side of the front portion of the sole plate (220), so that it can be removed when necessary.

[0055] According to one embodiment of the present invention, a sole (100) can be detachably coupled to a shoe (200). Specifically, the shoe (200) and the sole (100) can be coupled in such a way that the midsole (230) of the shoe (200) is inserted into a concave portion formed on the upper surface of the sole (100). In one embodiment, the sole (100) is configured to be detachably attached in a manner that wraps around the midsole (230) from the lower part of the midsole (230).

[0056] FIG. 2 is a drawing showing a sole according to one embodiment of the present invention.

[0057] Referring to FIG. 2, the sole (100) includes a recess (110) formed on the upper surface and configured to allow the midsole (230) of the shoe (200) to be inserted. As described above, the sole (100) can be mounted in such a way that the midsole (230) of the shoe (200) is inserted into the recess (110) of the sole (100).

[0058] According to one embodiment of the present invention, a fastening portion may be provided on the inner wall of the concave portion (110) of the sole (100) to be fastened to the outer surface of the midsole (230). In one embodiment, a plurality of fastening protrusions (231) are formed on the outer surface of the midsole (230), and a plurality of fastening holes (140) may be formed in the sole (100) at positions corresponding to the fastening protrusions (231) of the midsole (230).

[0059] According to one embodiment of the present invention, a curved portion may be formed along the longitudinal direction on the upper surface of the concave portion (110) of the sole (100). In one embodiment, a first curved portion (232) may be formed on the lower surface of the midsole (230) of the shoe (200), and a second curved portion (111) having a shape corresponding to the first curved portion (232) of the midsole (230) may be formed on the upper surface of the concave portion (110) of the sole (100). Accordingly, when the midsole (230) and the sole (100) are combined, the fastening projection (231) is inserted into the fastening hole (140), and at the same time, the first curved portion (232) of the midsole (230) can be seated in an accurate position while sliding over the curved shape of the second curved portion (111) of the sole (100).

[0060] According to one embodiment of the present invention, the sole (100) may be made of an elastic material, such as EVA, urethane, PU, ​​foam sponge, rubber, etc.

[0061] As such, since both the midsole (230) and the sole (100) are made of a flexible, soft material, when the midsole (230) is inserted into the sole (100), the fastening projection (231) of the midsole (230) can be inserted into the fastening hole (140) formed at a position corresponding to the fastening projection (231) as it moves into the inner side of the concave portion (110). It should be understood that the shape and number of the fastening projection (231) and the fastening hole (140) are not limited to those depicted and can be changed considering the fastening retention force, ease of removal, etc.

[0062] According to one embodiment of the present invention, the sole (100) may be made of a material that is relatively softer than the midsole (230). Accordingly, when the midsole (230) is attached to the sole (100), the sole (100) may spread apart, making it easy to insert the midsole (230), and when the sole (100) is separated, the sole (100) may bend flexibly, making it easy to separate. However, alternatively, it may also be possible to form the midsole (230) and the sole (100) from the same material.

[0063] 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) when the sole (100) is mounted on the shoe (200), and may be configured to protrude rearward from the heel portion of the shoe (200). Through the protrusion (120), the wearer can easily remove the sole (100) from the midsole (230) without touching it. This will be explained in detail later.

[0064] According to one embodiment of the present invention, the sole (100) may include a ledge (130). The ledge (130) may perform the function of helping to easily align the position when the sole (100) and the shoe (200) are combined. In one embodiment, the ledge (130) may be formed in a portion corresponding to the front part (e.g., toe portion) of the shoe (200) when the sole (100) is mounted on the shoe (200), and may be configured to protrude upward from the remaining portion of the upper surface of the sole (100). By placing the front part of the shoe (200) against the ledge (130) and inserting the midsole (230) into the concave portion (110), the wearer can conveniently attach the sole (100) to the shoe (200) while standing.

[0065] FIG. 3 is a drawing showing the bottom surface of a sole according to an embodiment of the present invention, and FIG. 4 is a drawing showing a vertical cross-section of a sole according to an embodiment of the present invention. Hereinafter, the structure of the bottom surface of a sole (100) according to an embodiment of the present invention will be described in detail with reference to FIG. 3 and FIG. 4.

[0066] According to one embodiment of the present invention, an anti-slip member (150) may be formed on the bottom surface of the sole (100) to prevent slipping. Through this anti-slip member (150), the sole (100) can be mounted on a shoe (200) to improve traction when active.

[0067] In the illustrated embodiment, a plurality of anti-slip members (150) having different orientations are formed on the bottom surface of the sole (100) so that slipping can be prevented regardless of which direction a force is applied. Additionally, each anti-slip member (150) may be formed spaced apart from each other at a predetermined interval. Accordingly, slipping of the sole (100) due to a water film phenomenon can be prevented. Specifically, when stepping on water pooled on the ground, if the bottom surface is formed simply flat or the anti-slip member (150) is formed as a single structure, the load spreads widely across the entire bottom surface, and the water cannot be quickly drained between the ground and the sole (100), which may cause a water film phenomenon. Consequently, the sole (100) loses traction and slips, which may cause a risk of injury to the wearer. On the other hand, in the case of a sole (100) according to one embodiment of the present invention, as the load is concentrated on each anti-slip member (150), water under the anti-slip member (150) can be quickly drained through the gap between each anti-slip member (150), thereby preventing a water film phenomenon.

[0068] A sole (100) according to one embodiment of the present invention includes at least one groove formed in a shape that is concavely recessed upward on the bottom surface. In the illustrated embodiment, three grooves (161, 162, 163) are formed on the bottom surface of the sole (100).

[0069] In this way, at least one groove (163) formed on the bottom surface of the sole (100) can be formed to be open to the rear and communicate with the outside while the bottom surface of the sole (100) is in contact with the ground. Accordingly, even when used on a smooth surface, a vacuum is formed in the lower part of the sole (100), preventing the sole (100) from adhering to the ground. In addition, when stepping on standing water on the ground, water trapped in the groove cannot be drained, thereby preventing a water film phenomenon from occurring.

[0070] Meanwhile, referring to FIG. 4, the bottom surface of the sole (100) may have a rounded shape along the longitudinal direction (i.e., the direction from the toes toward the heel) when viewed from the side. When a sole (100) with a flat bottom surface is applied to a splint-type shoe, it may cause strain on the user's knee joints, etc., during walking; however, the sole (100) according to one embodiment of the present invention can reduce such strain. This will be explained in detail later.

[0071] FIG. 5 is a drawing showing a state in which a sole according to one embodiment of the present invention is attached to a shoe, and FIG. 6 is a drawing showing a state in which a sole according to one embodiment of the present invention is detached from a shoe.

[0072] Referring to FIG. 5, a protrusion (120) of a sole (100) according to one embodiment of the present invention is formed in a portion corresponding to the heel of the shoe (200) when the sole (100) is mounted on the shoe (200), and may be 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 a protrusion (120), which protrudes further rearward by a predetermined width (E) than the heel portion (H2) of the shoe (200). Accordingly, the upper portion (121) of the protrusion (120) is exposed to the rear of the shoe (200).

[0073] Referring to FIG. 6, the wearer can remove the sole (100) from the midsole (230) of the shoe (200) by pressing the upper part (121) of the exposed protrusion (120) with the opposite foot to secure the sole (100) to the ground and then lifting the foot. At this time, since the sole (100) and / or midsole (230) are made of an elastic material such as EVA, urethane, PU, ​​foam sponge, or rubber, the fastening protrusion (231) of the midsole (230) can be easily removed from the fastening hole (140) of the sole (100).

[0074] As described above, when attaching the sole (100) to the shoe (200) (e.g., when moving from indoors to outdoors), the sole (100) is placed on the floor and the shoe (200) is pressed from above while only the approximate position is aligned. This causes the sole (100) to be aligned according to the curve formed in the concave portion (110) of the sole (100), thereby allowing the sole (100) to be seated and joined to the midsole (230). At this time, the position of the shoe (200) and the sole (100) can be adjusted more comfortably by means of the ledge portion (130). Even if the sole (100) is accidentally placed in an inconvenient position when being placed on the floor, the position of the sole (100) can be adjusted by pushing the ledge portion (130) with the shoe.

[0075] Additionally, when removing the sole (100) from the shoe (200) (e.g., when moving from outdoors to indoors), the midsole (230) can be easily separated from the sole (100) while the sole (100) is fixed to the ground through the protrusion (120). At this time, a groove is formed on the bottom surface of the sole (100) to prevent a vacuum from occurring, thereby preventing the sole (100) from adhering to the ground.

[0076] Accordingly, the sole (100) can be easily attached and detached without the need to bend the waist or legs when moving indoors or outdoors, making it convenient to use even for patients with limited mobility, and the splint effect can be maintained as there is no need to put on or take off the entire shoe (200). In addition, the sole (100) can be attached and detached without using hands, allowing for hygienic use.

[0077] FIG. 7 is a drawing showing walking conditions when using a sole according to an embodiment and a comparative example of the present invention. Specifically, FIG. 7 (a) to (c) shows walking conditions when using a sole with a flat bottom surface as a comparative example of the present invention, and FIG. 7 (d) to (f) shows walking conditions when using a sole having a rounded bottom surface according to an embodiment of the present invention. In addition, FIG. 7 (a) and (d) show a state where the foot begins to touch the ground, with the heel portion touching the ground; FIG. 7 (b) and (e) show an intermediate state where the middle portion of the sole's bottom surface is in contact with the ground; and FIG. 7 (c) and (f) show a state where the foot is lifted off the ground, with only the front portion of the sole in contact with the ground.

[0078] FIG. 8 is a graph showing the results of a walking simulation when using a sole according to an embodiment and a comparative example of the present invention, and shows the results of simulating the knee joint displacement, stress applied to the ankle portion, reaction force, etc. in the walking state of FIG. 7. FIG. 8 illustrates the simulation results when walking using an EVA material sole (elastic modulus 70 MPa) on a steel material surface (elastic modulus 2.07 GPa).

[0079] FIG. 8(a) is a graph showing the results of simulating the displacement of the knee joint, where the horizontal axis represents the displacement of the knee joint in the walking direction and the vertical axis represents the displacement of the knee joint in the vertical direction relative to the ground. Referring to FIG. 8(a), there is no significant difference in the vertical displacement until the knee joint moves 150 mm along the walking direction, but after 150 mm, the vertical displacement in the embodiment of the present invention decreased by 17.5% compared to the comparative example.

[0080] FIG. 8(b) is a graph showing the results of simulating the average Von Mises stress occurring in the ankle portion, where the horizontal axis represents the displacement of the knee joint with respect to the walking direction, and the vertical axis represents the average Von Mises stress occurring in the ankle portion. Referring to FIG. 8(b), the maximum value of the average stress in the sole according to the embodiment of the present invention was reduced by 50.1% compared to the comparative example.

[0081] As can be seen in Figures 8 (a) and (b), since the bottom surface of the sole according to one embodiment of the present invention has a rounded shape, it can be seen that compared to the flat case, knee joint displacement is reduced and the load applied to the ankle is reduced, allowing for comfortable and stable walking.

[0082] Figure 8(c) is a graph showing the results of simulating the vertical reaction force after removing the load from the sole, where the horizontal axis represents walking time and the vertical axis represents the vertical reaction force received by the sole from the ground. The simulation of the vertical reaction force was performed by applying body weight and initial velocity for 500 ms and then checking the time it takes for the foot to lift off the ground during the process of shifting weight to the opposite foot. At this time, the foot can be considered to have lifted off the ground at the point where the magnitude of the vertical reaction force becomes zero.

[0083] Referring to FIG. 8(c), it is confirmed that after the load is removed, it takes 49.63 ms for the vertical reaction force to become zero in the comparative example, whereas it takes 39.48 ms for the vertical reaction force to become zero in the embodiment of the present invention. That is, it is confirmed that the time required for the foot to lift off the ground is reduced by 20.5% as the bottom surface of the sole has a rounded shape. This suggests that when applying the sole according to one embodiment of the present invention, the walking speed and walking convenience of the wearer can be increased compared to when applying the sole according to the comparative example.

[0084] As such, the sole according to one embodiment of the present invention is configured to have a rounded shape on its bottom surface, and in particular when applied to a splint-type shoe, so-called leg protector, it can reduce discomfort during walking and enable stable walking, as well as increase walking speed.

[0085] Although the present invention has been described above with specific details such as specific components and limited embodiments, the above embodiments are provided only to aid in a more comprehensive understanding of the present invention and the present invention is not limited thereto, and a person skilled in the art to which the present invention belongs can make various modifications and variations from this description.

[0086] Accordingly, the scope of the present invention should not be limited to the embodiments described above, and all things that are equivalent or equivalently modified to the claims set forth below, as well as the claims described below, shall be considered to fall within the scope of the concept of the present invention.

Claims

1. As a removable sole for shoes, A concave portion formed on the upper surface and configured to allow the midsole of a shoe to be inserted, A protrusion formed on a portion corresponding to the heel of the shoe when mounted on the shoe, configured to protrude further rearward than the heel portion of the shoe, and including at least one groove formed in a shape that is concavely recessed upward on the bottom surface, bottom piece.

2. In Paragraph 1, The above-mentioned bottom surface has a rounded shape along the length direction when viewed from the side, a sole.

3. In Paragraph 1, A sole, wherein at least one groove is formed to be open to the rear and communicate with the outside while the bottom surface is in contact with the ground.

4. In Paragraph 1, A sole having a fastening portion on the inner wall of the above-mentioned concave portion that is fastened to the outer surface of the above-mentioned midsole.

5. In Paragraph 1, A sole, wherein the above-mentioned fastening portion includes a plurality of fastening holes formed along the inner wall perimeter of the above-mentioned concave portion, and the plurality of fastening holes are configured to be coupled with a plurality of fastening protrusions formed on the outer surface of the above-mentioned midsole.

6. In Paragraph 1, A shoe sole in which the upper surface of the above-mentioned concave portion has a curved portion formed along the longitudinal direction.

7. A protective part formed to wrap around at least a part of the user's leg, A bottom plate portion connected to the above-mentioned protective portion and formed to support the user's foot, A midsole provided at the lower part of the above-mentioned bottom plate and It includes a sole that is detachably configured on the above midsole, and The above sole is, A concave portion formed on the upper surface and configured to allow the midsole of a shoe to be inserted, A protrusion formed on a portion corresponding to the heel of the shoe when mounted on the shoe, configured to protrude further rearward than the heel portion of the shoe, and including at least one groove formed in a shape that is concavely recessed upward on the bottom surface, shoes.

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