Sandals

Abstract

The present invention relates to a sandal, and more specifically, to a sandal comprising: an outsole on which the sole of a wearer’s foot rests; and a strap that wraps from one side of the foot through the instep in the direction of the toes to the other side of the foot; wherein the outsole comprises: a first fastening hole that vertically penetrates the area where the toes are located and has an expanded step formed in the direction of the bottom surface; and a pair of second fastening holes that horizontally penetrate each of the two side portions of the foot and have an expanded step formed in the direction of the outer side; and the strap comprises: a first fastening projection whose tip portion extending downward from the front in the direction of the toes is inserted through the first fastening hole; and a pair of second fastening projections whose tip portions extending outward from the tip portions on both sides in the direction of the two side portions of the foot are inserted through the second fastening hole; and a C-shaped clip that is fitted and coupled to the tip portions of each of the first fastening projection and the second fastening projection while being inserted into the expanded steps of each of the first fastening hole and the second fastening hole.

Description

Technology Field

[0001] The present invention relates to sandals, and more specifically to flip-flop sandals, which are a type of sandal. Background Technology

[0003] Sandals are a general term for footwear consisting of a sole made of materials such as leather or vinyl with straps attached to it and tied over the instep. One type of sandal is the flip-flop, which features a Y-shaped leather strap passing between the big toe and the index toe and a flat sole loosely secured to the foot.

[0004] These flip-flop sandals come in two types: an integrated type where the outsole and the strap are formed as a single unit, and a separate type where the outsole and strap are manufactured separately and joined by insertion or adhesive.

[0005] Conventional flip-flop sandals of this type have the problem that the outsole and strap are manufactured as a single unit, making mold production difficult and the unit cost of the mold high. Additionally, the entire manufacturing process, including the process of inserting material into the mold and stamping it out, and the process of removing the manufactured sandals from the mold, is very cumbersome.

[0006] Furthermore, since conventional flip-flop sandals feature an integrated outsole and strap, there are limitations to the overall design expandability and diversity of the sandal, which inevitably restricts choices based on consumer preferences.

[0007] Meanwhile, among conventional flip-flop sandals, the aforementioned separate type is manufactured by separately producing the sole and straps and attaching or attaching them, allowing for the application of various materials and partial colors; however, since the sole and straps are separate, there is a disadvantage in that lightweight materials cannot be used like the aforementioned integrated type due to concerns regarding reduced bonding strength. Prior art literature

[0009] Korean Published Patent Application No. 10-2025-0064848 (Published May 12, 2025) The problem to be solved

[0010] The present invention relates to flip-flop sandals, a type of sandal, and aims to provide a sandal with an improved structure in which the outsole and strap are assembled, thereby enhancing manufacturability or productivity from the manufacturer's perspective and ensuring selectivity and design expandability according to individual preferences from the consumer's perspective.

[0011] Additionally, another objective of the present invention is to provide a sandal with a structurally improved design that ensures the robustness and stable retention of the fastening while providing ease of attachment and detachment of the strap that is assembled to the outsole.

[0012] Additionally, another objective of the present invention is to provide a sandal with a structurally improved design that can enhance wearing comfort by adjusting the strap fastening position according to the wearer's foot size. means of solving the problem

[0014] The present invention for achieving the above-mentioned purpose comprises an outsole on which the wearer's sole rests; and a strap that wraps from one side of the foot through the instep in the direction of the toes to the other side of the foot. The outsole comprises: a first fastening hole that vertically penetrates the area where the toes are located and has an expanded step formed in the direction of the bottom surface; and a pair of second fastening holes that horizontally penetrate each of the two side portions of the foot and have an expanded step formed in the direction of the outer side. The strap comprises: a first fastening projection, the tip portion of which extends downward from the front in the direction of the toes and is inserted through the first fastening hole; and a pair of second fastening projections, the tip portions of which extend outward from the tip portions on both sides in the direction of the two side portions of the foot and are inserted through each of the second fastening holes. The strap may include a C-shaped clip that is fitted and coupled to the tip portions of each of the first fastening projection and the second fastening projection while being inserted into the expanded steps of each of the first fastening hole and the second fastening hole.

[0015] In the present invention, the outsole may have both sides to which the front portions of the strap are fastened protruding upward, and strap insertion grooves formed in the protruding portions to which the ends of the strap are inserted.

[0016] The protruding portions of the outsole of the present invention in which the strap insertion groove is formed are on both sides of the heel, and the strap insertion groove may be an elongated groove having a depth equal to the thickness of both ends of the strap.

[0017] The first fastening hole of the present invention is formed in the area between the big toe and the index toe, and may be formed as one or multiple holes spaced apart.

[0018] The first fastening hole of the present invention may be formed in at least two places in each of the areas between the big toe, index toe, middle toe, ring toe, and little toe, and the first fastening projection of the strap corresponding thereto may also be formed in two or more places.

[0019] In the present invention, the first fastening projection and the second fastening projection of the strap may have a circular groove formed at the tip portion into which the C-shaped clip is fitted.

[0020] The first fastening projection of the strap of the present invention may have an elliptical fastening block having a long axis formed extendably at the tip portion, and a through hole formed at a distance in the middle portion of the fastening block to provide a portion into which the C-shaped clip is fitted and fastened.

[0021] The expansion step at the bottom of the first fastening hole of the outsole where the fastening block of the present invention is located may be formed with the same shape as the shape of the fastening block, and an expansion groove, which is a space into which the C-shaped clip is inserted, may be formed on both sides in the direction of the long axis of the expansion step. Effects of the invention

[0023] The present invention allows the outsole and strap constituting the flip-flop sandal to be detachably assembled, thereby enabling consumers to customize the sandal by selectively combining outsoles and straps of various shapes or colors according to their personal preferences, thereby ensuring selectivity and design expandability for the sandal. Furthermore, by allowing only the relevant element to be replaced in the event of wear on the outsole or breakage (breaking) of the strap, it achieves the effect of reducing maintenance costs and minimizing environmental pollution.

[0024] The present invention achieves the effect of providing ease of attachment of the strap to the outsole while ensuring a robust fastening force and a stable fastening state by applying a fastening structure using a press-fit structure and a C-shaped clip to the detachable structure of the strap that is assembledly fastened to the outsole.

[0025] The present invention provides a protruding portion formed on both sides of the foot of an outsole, a strap insertion groove formed on each of the inner surfaces facing the two protruding portions, and when the leading edge of the strap is inserted into the strap insertion groove and the second fastening projection of the strap penetrates the second fastening hole and protrudes as an expanded step, a C-shaped clip is fastened to the second fastening projection protruding as an expanded step in a bolt-locking manner, thereby preventing the second fastening projection inserted into the second fastening hole from detaching and maintaining a secure fastening state.

[0026] The present invention forms a plurality of first fastening holes at intervals, allowing the first fastening projection of the strap to be fastened to the first fastening hole that is optimal for one's own foot among the plurality of first fastening holes according to the shape or size of the foot of each wearer, particularly according to the position or length of the toes, thereby providing compatibility and versatility of the sandal while also maximizing the wearing comfort.

[0027] The present invention ensures that the first fastening projection of a strap is inserted into a first fastening hole of an outsole and fastened, and that a fastening block formed at the tip of the first fastening projection is inserted into an expanded step with a long axis, thereby minimizing the prevention of the first fastening projection from detaching from the first fastening hole. In addition, a C-shaped clip is fastened across a through hole formed in the fastening block in a bolt-locking manner, thereby achieving the effect of maintaining the fastening state of the strap to the outsole more securely. Brief explanation of the drawing

[0029] FIG. 1 is a perspective view illustrating the overall configuration of the present invention. FIG. 2 is an exploded perspective view illustrating the overall configuration and assembly state of the present invention. FIG. 3 is a side cross-sectional view illustrating the configuration and assembly state of the present invention. FIG. 4 is a plan view and a bottom view illustrating a configuration or structure in which the first fastening hole and the first fastening projection of the present invention are correspondingly coupled. FIG. 5 is a plan view illustrating another embodiment related to the first fastening hole of the present invention. FIG. 6 is a plan view illustrating another embodiment related to the first fastening hole of the present invention. FIG. 7 is a plan view illustrating another embodiment related to the fastening structure of the first fastening hole and the first fastening projection of the present invention. FIG. 8 is a bottom perspective view showing the fastening structure of the first fastening hole and the first fastening projection of the present invention in more detail and enlarged. FIG. 9 is a plan view and a bottom view illustrating another embodiment related to the fastening structure of the first fastening hole and the first fastening projection of the present invention. Specific details for implementing the invention

[0030] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Identical or similar components regardless of drawing symbols are assigned the same reference numeral, and redundant descriptions thereof will be omitted. Furthermore, in describing the embodiments disclosed in this specification, if it is determined that a detailed description of related prior art could obscure the essence of the embodiments disclosed in this specification, such detailed description will be omitted.

[0031] Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0032] A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0033] In this application, terms such as “comprising” or “having” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0035] The present invention will be described in detail below with reference to the attached drawings.

[0036] The sandal (100) of the present invention, as illustrated in the attached drawings FIGS. 1 to 3, comprises: an outsole (110) on which the wearer's sole rests; and a strap (120) that wraps from one side of the foot through the instep in the direction of the toes to the other side of the foot. In the sandal (100), the outsole (110) comprises: a first fastening hole (111) that vertically penetrates the area where the toes are located and has an expanded step (111a) formed in the direction of the bottom surface; and a pair of second fastening holes (112) that horizontally penetrate each of the two side portions of the foot and have an expanded step (112a) formed in the direction of the outer side. The strap (120) comprises: a first fastening projection (121) in which a leading portion extending downward from the front in the direction of the toes is inserted through the first fastening hole (111). It may include a pair of second fastening protrusions (122) that extend laterally from the front portions of both sides of the foot and penetrate into each of the second fastening holes (112); and may include a C-shaped clip (130) that is fitted into the front portions of each of the first fastening protrusions (121) and second fastening protrusions (122) while being inserted into the extended steps (111a) (112a) of each of the first fastening hole (111) and the second fastening hole (112).

[0037] The present invention allows the outsole (110) and strap (120) constituting the flip-flop sandal (100) to be detachably assembled, thereby enabling consumers to customize the sandal (100) by selectively combining the outsole (110) and strap (120), which are made of various shapes or colors, according to their personal preferences, thereby ensuring selectability and design expandability for the sandal. Furthermore, it is possible to reduce maintenance costs and minimize environmental pollution by allowing only the relevant elements to be replaced in the event of wear on the outsole (110) or damage (breakage) of the strap (120).

[0038] In addition, the present invention makes it possible to provide ease of attachment of the strap (120) to the outsole (110) while maintaining a strong fastening force and a stable fastening state by applying a fastening structure through a press fit structure and a C-shaped clip (130) to the detachable structure of the strap (120) that is assembledly attached to the outsole (110).

[0039] Additionally, the outsole (110) of the present invention may be a soft synthetic resin material having a cushion including EVA foam, the strap (120) may be a synthetic resin material that is relatively harder than the outsole (110) including PVC material, and the C-shaped clip (130) may be a synthetic resin material that is relatively harder than the strap (120).

[0040] In this way, the strap (120) is made of a hard material compared to the outsole (110), so that it is easily and stably fastened to the outsole (110), and the strap (120) does not easily break even when worn for a long time.

[0041] In addition, the C-shaped clip (130) is fastened across the tip portions of the first and second fastening protrusions (121) (122) of the strap (120) that are fitted into the first and second fastening holes (111) (112) of the outsole (110) in a bolt-lock manner to maintain the fastened fixed state of the strap (120) to the outsole (110). Compared to a C-shaped clip made of a soft synthetic resin material, the C-shaped clip (130) made of a hard synthetic resin material can maintain the fastened state more firmly without being deformed by external pressure.

[0042] For reference, the outsole (110) is designed with an arched structure to distribute body weight, and the positions of the first and second fastening holes (111) (112) to which the strap (120) is connected are preferably selected and applied to ensure stable connection without interfering with the fit when the strap (120) is connected, while maintaining aesthetics. It is also preferable to position the part where the strap (120) is connected to the outsole (110) towards the rear so as not to interfere with the arch structure compared to a standard flip-flop sandal.

[0043] Here, the outsole (110) of the present invention may have both sides, to which the front ends of the strap (120) are fastened, protruding upward, and strap insertion grooves (113) formed in the protruding parts to which the ends of the strap (120) are inserted.

[0044] At this time, the strap insertion groove (113) may be positioned in a direction opposite to the extension step (112a) of the second fastening hole (112).

[0045] In this way, when the second fastening projection (122) formed at the tip portion of the strap (120) inserted in correspondence with the strap insertion groove (113) is in a state where it penetrates the second fastening hole (112) and protrudes to the expansion step (112a), the C-shaped clip (130) is fastened in a bolt-locking manner to the second fastening projection (122) protruding to the expansion step (112a), and the C-shaped clip (130) acts as a catch while inserted into the expansion step (112a), thereby preventing the second fastening projection (122) inserted into the second fastening hole (112) from coming off.

[0046] The inner diameter of the aforementioned extended steps (111a) (112a) may have an inclined step formed protruding from the lower inner diameter portion of the extended steps (111a) (112a) to prevent the C-shaped clip (130) from coming off toward the bottom surface when inserted.

[0047] At this time, the extended step (112a) of the second fastening hole (112) corresponds to a safety structure to prevent the C-shaped clip (130) from easily detaching, but since it is not strictly required, it may be excluded.

[0048] Additionally, the protruding portion where the strap insertion groove (113) of the outsole (110) of the present invention is formed is a portion on both sides of the rear foot where the heel is seated, and the strap insertion groove (113) may be an elongated groove having a depth equal to the thickness of both ends of the strap (120).

[0049] In this way, if the depth of the strap insertion groove (113) is made to be the same as the thickness of both ends of the strap (120), the strap (120) coupled to the inner sides of both sides of the outsole (110) is prevented from protruding toward the wearer's foot, thereby preventing skin pressure during wear and preventing a decrease in comfort.

[0050] In addition, the first fastening hole (111) of the present invention is formed in the area between the big toe and the index toe as shown in FIG. 4 as an example, and the number of the first fastening hole (11) is one as an example, but as shown in FIG. 5 of the attached drawings, a plurality of the first fastening holes (111) are formed at intervals as a preferred example. Although three are shown formed in one example of the present invention, it is obvious that the scope of the rights of the present invention is not limited thereto as long as multiple are formed.

[0051] In this way, depending on the shape or size of the foot of each wearer, especially the position or length of the toes, the first fastening projection (121) of the strap (120) can be fastened to the first fastening hole (111) that is optimal for one's own foot among the plurality of first fastening holes (111) so that it can be used, thereby providing compatibility and versatility of the sandal (100) while ensuring maximum comfort.

[0052] In addition, the first fastening hole (111) of the present invention may be formed in at least two places in each of the areas between the big toe, index toe, middle toe, ring toe, and little toe, and the first fastening projection (121) of the strap (120) corresponding thereto may also be formed in two or more places.

[0053] In this way, when the first fastening hole (111) is formed in the outsole (110), at least two or more are provided in the respective areas between the wearer's big toe, index toe, middle toe, ring toe, and little toe, thereby increasing the wearing force of the sandal (100), and thereby preventing the sandal (100) from coming off as much as possible during the process of wearing and walking.

[0054] In addition, when the first fastening hole (111) and the corresponding first fastening projection (121) are provided between all the toes, not only is the wearing force further increased, but it can also be effective in improving hallux valgus.

[0055] In addition, the first fastening projection (121) and the second fastening projection (122) of the strap (120) of the present invention may each have a circular groove (121a) (122a) formed at the tip portion into which the C-shaped clip (130) is fitted.

[0056] In this way, the C1-type clip (130) is fastened by crossing the circular grooves (121a) (122a) formed at the tip portions of the first and second fastening protrusions (121) (122) that are fitted into the first and second fastening holes (111) (112), respectively, in a bolt-locking manner, and the C-type clip (130) acts as a catch while inserted into the expansion step (111a) (112a), thereby making it possible to maintain the fastening state of the strap (120) to the outsole (110) firmly.

[0057] At this time, the first fastening projection (121) of the strap (120) of the present invention may have an elliptical fastening block having a long axis formed at the tip portion as shown in the attached drawings FIGS. 7 to 9, and a pair of through holes (124) formed at a distance in the middle portion of the fastening block (123) to provide a portion where the C-shaped clip (130) is fitted and fastened.

[0058] At this time, the expansion step (111a) at the bottom of the first fastening hole (111) of the outsole (110) where the fastening block (123) of the present invention is located may be formed with the same shape as the fastening block (123), and the expansion groove (114), which is a space into which the C-shaped clip (130) is inserted, may be formed on both sides in the long axis direction of the expansion step (111a).

[0059] In this way, when the first fastening projection (121) of the strap (120) is inserted into the first fastening hole (111) of the outsole (110) and fastened, the fastening block (123) is inserted with its long axis into the extended step (111a), thereby preventing the first fastening projection (121) from coming off the first fastening hole (111) as much as possible. In addition, the C-shaped clip (130) is fastened across the through hole (124) in a bolt-locking manner, so that the fastening state of the strap (120) to the outsole (110) is firmly maintained.

[0061] The technical features disclosed in each embodiment of the present invention as described above are not limited to that embodiment only, and as long as they are not mutually incompatible, the technical features disclosed in each embodiment may be combined and applied to different embodiments.

[0062] Therefore, in each embodiment, the technical features are described primarily, but as long as the technical features are not mutually incompatible, they may be combined and applied together.

[0063] The present invention is not limited to the embodiments described above and the attached drawings, and various modifications and variations may be possible from the perspective of a person skilled in the art to which the present invention belongs. Accordingly, the scope of the present invention should be defined not only by the claims of this specification but also by equivalents thereof. Explanation of the symbols

[0065] 100: Sandals 110: Outsole 120: Strap 130: C-clip

Claims

Claim 1 A sandal comprising: an outsole on which the wearer's sole rests; and a strap that wraps from one side of the foot, through the instep toward the toes, to the other side of the foot, wherein the outsole comprises: a first fastening hole vertically penetrating the area where the toes are located, with an expanded step formed in the direction of the bottom surface; and a pair of second fastening holes horizontally penetrating each of the two side portions of the foot, with an expanded step formed in the direction of the outer side; and the strap comprises: a first fastening projection, the tip portion extending downward from the front in the direction of the toes and penetrating into the first fastening hole; and a pair of second fastening projections, the tip portions extending outward from the tip portions on both sides in the direction of the two side portions of the foot and penetrating into each of the second fastening holes. The strap includes a C-shaped clip that is fitted and coupled to the tip portions of the first and second fastening protrusions, respectively, while being inserted into the expanded step portions of the first and second fastening holes. The first and second fastening protrusions of the strap have an elliptical fastening block having a major axis formed by expansion at the tip portion, and a pair of through holes are formed spaced apart in the middle portion of the fastening block to provide a portion into which the C-shaped clip is fitted and fastened. The expanded step portion at the bottom of the first and second fastening holes of the outsole where the fastening block is located is formed with the same shape as the shape of the fastening block, and an expansion groove into which the C-shaped clip is inserted is formed on both sides in the direction of the major axis of the expanded step portion. When the first and second fastening protrusions of the strap are fitted and fastened into the first and second fastening holes of the outsole, the fastening block is fitted into the expanded step portion with a major axis to prevent the first and second fastening protrusions from detaching from the first and second fastening holes, and the C-shaped clip is in a bolt-locking form in the through holes. A sandal that is fastened across the outsole to ensure that the fastening state of the strap is firmly maintained. Claim 2 In claim 1, the outsole is a sandal having two sides on which the front ends of the strap are fastened protruding upward, and strap insertion grooves formed in the protruding parts into which the ends of the strap are inserted. Claim 3 In paragraph 2, the protruding portion where the strap insertion groove of the outsole is formed is a portion on both sides of the heel, and the strap insertion groove is a long groove having a depth equal to the thickness of both ends of the strap, in a sandal. Claim 4 In claim 1, the first fastening hole is formed in the area between the big toe and the index toe, and is a sandal in which one or more are formed at intervals. Claim 5 A sandal according to claim 1, wherein at least two first fastening holes are formed in areas corresponding to the big toe, index toe, middle toe, ring toe, and little toe, and at least two first fastening protrusions of the strap are also formed therein. Claim 6 In claim 1, the first fastening projection and the second fastening projection of the strap are a sandal having a circular groove formed at the tip portion into which the C-shaped clip is fitted. Claim 7 delete Claim 8 delete

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