New regulations require ankle boots to use a crescent-shaped core.

Abstract

To provide a new moon-shaped core for low boots which is easy to wear when worn and holds the wearer's feet well when worn, so that the core is hard to come off while the wearer is walking or when starting to walk, and to provide low boots using the core. [Solution] A moon-shaped core 10 for low boots that is attached to the heel of a low boot, and is characterized in that it is composed of a specified rear heel contact portion 11 and a pair of side portions 12 (12a, 12b), the pair of side portions extending to the sides of the wearer's midfoot, and the distance between the side portions meeting specified conditions.

Description

[Technical Field]

[0001] This invention relates to a new moon-shaped core for low boots, and more specifically to a new moon-shaped core for low boots that is easy to put on and also difficult to slip off by sufficiently holding the wearer's foot when worn. [Background technology]

[0002] Conventionally, sneakers, leather shoes, and other low boots have been equipped with a moon-shaped core (reinforcing core, counter, stiffener) in the heel area. This moon-shaped core not only provides mechanical strength to the heel area of ​​the low boots, but also contributes to improving the stability of the wearer's calcaneus by surrounding the heel when the boots are worn.

[0003] In recent years, there have also been attempts to improve the ease of wearing shoes by providing a hard protruding piece at the top end of the heel of a conventional moon-shaped core, diagonally upward and rearward, which makes it easier for the wearer to smoothly guide their foot into the inside of the shoes when putting on the shoes.

[0004] For example, Patent Document 1 discloses "a moon-shaped insoles for footwear and low boots that can be worn without crushing the heel" (paragraph 0003 of the specification, etc.).

[0005] Specifically, this moon-shaped core is "a moon-shaped core for low boots that is attached to the inside of the heel of low boots, comprising a moon-shaped core body and a moon-shaped core valley portion provided in the center of the upper end of the moon-shaped core body, a first moon-shaped core ridge portion formed on one side of the moon-shaped core valley portion and a second moon-shaped core ridge portion formed on the other side of the moon-shaped core valley portion, the tip portion of the first moon-shaped core ridge portion inclined outward from the moon-shaped core body, and the tip portion of the second moon-shaped core ridge portion inclined outward from the moon-shaped core body, and when the moon-shaped core body is attached to the low boots, the first moon-shaped core ridge portion, moon-shaped core valley portion and second moon-shaped core ridge portion protrude above the top line of the heel of the low boots" (Claim 1, Abstract, etc.). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 7289471

[0007] Summary of the Invention [Problem to be solved by the invention]

[0008] The inventors of the present invention have thoroughly studied the structure of conventional moon-shaped cores and the functions resulting from said structure, and have found that while conventional moon-shaped cores are recognized to improve ease of putting on, they have the problem of footwear (shoes) easily coming off while the wearer is walking or when starting to walk. In other words, with conventional moon-shaped cores that have improved ease of putting on, it is difficult to achieve both ease of putting on and difficulty in coming off, and it can be said that there is still room for improvement in this regard. Furthermore, the inventors discovered that by extending the side portions (also called "wing portions") of the moon-shaped core not only to the side portions of the heel but also to the side portions of the arch, when worn, it can abut against the rearmost surface and side of the side portion of the heel of the wearer, up to the side of the arch; and further, by satisfying specific conditions for the distance between the inner side portion and the outer side portion, it is possible to sufficiently hold (hold) the side of the wearer's foot from both sides, thereby solving the problem of footwear (low boots) easily coming off while the wearer is walking or when starting to walk.

[0009] In other words, the purpose of this invention is to provide a new moon-shaped core for low boots, which is easy to put on and also has the effect of holding the wearer's feet firmly when worn, making it difficult for the core to slip off while walking or when starting to walk, and low boots using the same. [Means for solving the problem]

[0010] The moon-shaped shoe pad of the present invention is a moon-shaped shoe pad that is attached to the heel of a shoe, The shoe is composed of a heel rear contact portion that contacts the back side of the wearer's heel, and a pair of side portions that extend from both ends of the heel rear contact portion, The pair of side surfaces include an inner side surface and an outer side surface, The inner side surface portion and the outer side surface portion face each other, The pair of side portions extend to the sides of the midfoot of the wearer, and the distance between the inner side portion and the outer side portion satisfies the following condition (1).

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[0011] [Figure 1] 1(A) to 1(C) are side and top views showing the shoes and their positional relationships, while 1(B) and 1(C) show the left and right shoes, respectively. [Figure 2] FIG. 2 is a diagram (front view, back view, top view) showing one embodiment of the moon-shaped core according to the present invention. [Figure 3] FIG. 3 is a diagram (left and right side views) showing one embodiment of the moon-shaped core according to the present invention. [Figure 4] Fig. 4 is a side view showing a pair of low boots fitted with the moon-shaped core of the present invention. In Fig. 4, the moon-shaped core is built into the low boots, and the dot pattern indicates the built-in moon-shaped core. [Figure 5] Figures 5(A) to 5(C) are diagrams showing the positional relationship between the moon-shaped core of the present invention and the wearer's foot. Note that Figures 5(B) and 5(C) omit the low boot portion to clarify the positional relationship between the moon-shaped core of the present invention and the wearer's foot. [Figure 6] Figure 6 is a diagram showing the positional relationship between the sole of a wearer's foot and the moon-shaped core of the present invention when wearing a low boot using the moon-shaped core of the present invention. Note that the low boot portion has been omitted from Figure 6 to clarify the positional relationship between the moon-shaped core of the present invention and the wearer's foot. [Figure 7]Fig. 7(A) is a diagram (top view) showing another embodiment of the moon-shaped core according to the present invention (an embodiment in which the distance between the medial side surface portion and the lateral side surface portion decreases from the rear heel contact portion toward the distal ends of the medial side surface portion 12a and the lateral side surface portion 12b). Fig. 7(B) is a diagram showing the maximum distance Dmax between the medial side surface portion and the lateral side surface portion and the minimum distance Dmin between the medial side surface portion and the lateral side surface portion. [Figure 8] FIG. 8 is a diagram (top view) showing another embodiment of the moon-shaped core according to the present invention (an embodiment in which a protrusion for preventing shoes from slipping off is formed). DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, the moon-shaped core for low boots (also simply referred to as "moon-shaped core") and low boots according to the present invention will be described in detail with reference to the drawings as appropriate.

[0013] As shown in Figure 1(A), in this specification, "forward" and "backward" refer to the direction toward the toe 2 and heel 3 of the shoe, respectively, and "upward" and "downward" refer to the direction toward the upper 5 and top line 6 of the shoe and the direction toward the sole 4 of the shoe, respectively (i.e., the direction away from and toward the ground when in use). As shown in Figures 1(B) and 1(C), "inward" and "outward" refer to the direction toward the big toe and little toe of the wearer's foot, respectively.

[0014] FIG. 2 is a diagram (front view, back view, top view) showing one embodiment of the moon-shaped core according to the present invention, illustrating a moon-shaped core 10 used in a left-foot low shoe. As shown in FIG. 2, the moon-shaped core 10 for low boots according to the present invention is composed of a rear heel contact portion 11 that contacts the back side of the wearer's heel, and a pair of side portions 12 (wing portions, an inner side portion 12a and an outer side portion 12b) extending from both ends of the rear heel contact portion 11. Here, as shown in FIG. 2(C), the inner side portion 12a and the outer side portion 12b are positioned opposite each other and extend toward the front of the low boot while contacting the side portions of the low boot. Here, "opposing" refers to a state in which the inner side portion 12a and the outer side portion 12b face each other on the inside of each other, and refers to a positional relationship in which, for example, the inner side portion 12a and the outer side portion 12b are approximately parallel when viewed from above, or the distance between the inner side portion 12a and the outer side portion 12b decreases as they move forward.

[0015] The moon-shaped core 10 for low boots according to the present invention is attached to the heel 3 of the low boots when in use. Specifically, as shown in Figure 4, the moon-shaped core of the present invention has its rear heel contact portion 11 in contact with the inner surface of the rearmost part of the heel of the low boot, and is generally located inside (built-in to) the heel of the low boot.

[0016] 3(A)-(B) and 4, the front end portions F of the medial side portion 12a and the lateral side portion 12b are characterized by extending to the side of the wearer's midfoot (the side of the arch portion). In other words, as shown in Fig. 4, when the sole of the low shoe is in contact with the ground G, the front end portions F of the medial side portion 12a and the lateral side portion 12b reach the midfoot M, which is the part that is not in contact with the ground G.

[0017] By having such a configuration, as shown in FIGS. 5 and 6, the moon core for ankle boots contacts (abuts) the rear surface of the wearer's heel, as well as the side surface of the heel and the side surface of the midfoot, and can hold well. Therefore, when worn, by sufficiently holding the wearer's foot (by improving the holding characteristics), the effect that it is difficult to come off during the wearer's walking or at the start of walking can be exerted.

[0018] In addition, the material of the moon core according to the present invention is not particularly limited. However, similar to the material of a general moon core, in order to improve the above-mentioned holding characteristics, synthetic resins such as polypropylene, polyethylene terephthalate, and polyamide resin can be mentioned. Further, from the viewpoint of improving the above-mentioned holding characteristics, the above-mentioned material may be a metal such as aluminum or stainless steel, or wood, or a composite material containing at least two kinds of materials selected from the group consisting of the above-mentioned synthetic resin, metal, and wood. When the material is a synthetic resin, it can be molded by a general molding machine.

[0019] From the viewpoint of further improving the holding property and achieving good wearability and difficulty in coming off during the wearer's walking or at the start of walking, as shown in FIG. 7, the moon core according to the present invention has a separation distance between the inner side surface portion 12a and the outer side surface portion 12b that becomes smaller as it progresses from the rear contact portion side of the heel toward the end portions of the inner side surface portion 12a and the outer side surface portion 12b, and it is preferably configured to be able to sandwich the side surface of the foot of the ankle boot wearer (specifically, the side surface of the midfoot).

[0020] The reference numerals D1 to D3 in FIG. 7(A) indicate the separation distance between the inner side surface portion 12a and the outer side surface portion 12b. The separation distances indicated by the reference numerals D1 to D3 have a relationship shown as "D1 < D2 < D3". That is, as it progresses from the rear to the front, the separation distance between the inner side surface portion 12a and the outer side surface portion 12b gradually becomes smaller (that is, the side surface portions approach each other as they progress toward the end portions of both side surface portions).

[0021] In the crescent-shaped core for low boots according to the present invention, the distance between the inner side surface portion and the outer side surface portion satisfies the following condition (1): Here, as shown in Fig. 7(B), Dmax is the maximum distance between the inner side surface portion and the outer side surface portion, and Dmin is the minimum distance between the inner side surface portion and the outer side surface portion.

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[0022] Furthermore, if the Dmax / Dmin is 1.03 to 1.15, the effects of the present invention can be fully achieved, but from the viewpoint of improving hold and preventing the garment from coming off while the wearer is walking or when starting to walk, the Dmax / Dmin is preferably 1.05 to 1.12, and more preferably 1.08 to 1.10.

[0023] Furthermore, from the viewpoint of improving the holding power and making it less likely for the shoe to come off while the wearer is walking or when starting to walk, it is preferable that the moon-shaped core of the present invention has at least one protrusion for preventing the shoe from coming off formed on the inner side (i.e., the side that comes into contact with the wearer's foot when worn), and it is more preferable that the protrusion 18 for preventing the shoe from coming off is formed on the inner side of the side portion 12 (the inner side of the inner side portion 12a and the inner side of the outer side portion 12b), as shown in Figure 8(A).

[0024] 8(B) and (C) are respectively the X1-X2 cross-sectional view and the Y1-Y2 cross-sectional view of Fig. 8(A). As shown in these figures, the shoe-slip prevention projections 13 are convex inward, and these shoe-slip prevention projections 13 hold the wearer's foot with a high localized clamping force, making it extremely difficult for the shoe to slip off.

[0025] The protrusions for preventing the shoes from coming off are preferably made of a flexible material such as elastomer.

[0026] As shown in Figures 8(B) and (C), it is preferable to have a protrusion 14 that protrudes above the top line. This configuration makes it easier for the wearer to insert the toes of the wearer's feet into the top line of the low boots, and the heel can also be easily inserted as it is guided by the protrusion 14.

[0027] Furthermore, the low boots according to the present invention are characterized by having the moon-shaped core of the present invention built in. Here, the types of low boots are not particularly limited, but include sneakers, sports shoes, leather shoes, etc. For example, if the low boots according to the present invention are sports shoes, they are advantageous in that they can prevent sportspeople (athletes and joggers) from slipping off their shoes during exercise.

[0028] It is also preferable that the boots according to the present invention are used by medical professionals or caregivers, in which case, for example, it is possible to prevent the medical professionals or caregivers from having to stop working due to their boots coming off while working. [Industrial Applicability]

[0029] According to the present invention, it is possible to provide a new moon-shaped core for low boots that is both easy to put on and difficult to slip off while the wearer is walking or when starting to walk, and low boots using the same. [Explanation of symbols]

[0030] 1: Short shoes 1L: Short shoes for left foot 1R: Short shoes for right foot 2: Toe area 3: Heel 4: Shoe sole 5: Upper 6: Top line 7: Tan 8: Shoelaces 10: Moon-shaped shoe insert according to the present invention 11: Heel rear contact part 11 12: Side part (wing part) 12a:Inner side part 12b:Outer side part 13: Convex part to prevent shoes from slipping off 14:Protrusion M: midfoot G: Ground Y: Wearer's feet D1~D3: Separation distance Dmax: The maximum distance between the inner side surface and the outer side surface Dmin: The minimum distance between the inner side surface and the outer side surface

Claims

[Claim 1] A moon-shaped shoe pad for low boots that is attached to the heel of the low boots, The shoe is composed of a heel rear contact portion that contacts the back side of the wearer's heel, and a pair of side portions that extend from both ends of the heel rear contact portion, The pair of side surfaces include an inner side surface and an outer side surface, The inner side surface portion and the outer side surface portion face each other, The pair of side portions extend to the sides of the midfoot of the wearer, The distance between the inner side surface portion and the outer side surface portion becomes smaller as the distance from the heel rear contact portion toward the distal end portion of the inner side surface portion and the outer side surface portion is increased, so that the side surface of the foot of the low shoe wearer can be held in place. A moon-shaped sole for low boots, characterized in that the distance between the inner side surface portion and the outer side surface portion satisfies the following condition (1). [Equation 1]

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