TWI882744B - shoe - Google Patents

Abstract

The present invention provides a shoe with health-promoting function. The shoe 11 has a sole 110 in the shape of a foot for a load-bearing foot, and is characterized in that: the sole 11 has a first recessed portion 110a and a second recessed portion 110b on the bottom surface, the first recessed portion 110 is opposite to the user's heel through the bottom of the first recessed portion 110, and the second recessed portion 110b is opposite to the user's big toe, index toe and the root part of the foot through the bottom of the second recessed portion 110b, and the bottoms of the first recessed portion and the second recessed portion 110b are flexible.

Description

shoe

The present invention relates to shoes such as sandals or sandals which are open from the ankle down.

Shoes such as straw sandals or sandals are open from the ankle down, and are generally constructed by attaching a strap or foot strap to a flat sole in the shape of the sole. In the past, straw sandals or sandals with health-promoting functions such as protrusions on the sole to stimulate the acupuncture points of the sole when walking or tilting the sole horizontally to correct O-shaped legs, X-shaped legs, etc. were popular.

In the past, this technology was recorded in Patent Document 1. Patent Document 1 describes a healthy sandal, which is centered on the index toe and sets the front end of the clip strap at two locations in a way that the index toe is clamped, with the big toe, the middle toe, the ring toe, and the little toe forming a one-to-three arrangement. The top of the index toe is raised by about 2 to 5 mm.

[Prior technical literature] [Patent Literature]

[Patent Document 1] Japan Practical New Case Registration No. 3232282

However, in recent years, low-priced shoes such as beach sandals are expected to have health-promoting functions. In particular, when wearing a swimsuit at the beach, in order to make the O-shaped legs less noticeable, the emergence of beach sandals with the function of correcting O-shaped legs is expected.

The present invention is in response to such expectations and aims to provide shoes with health-promoting functions.

In order to achieve the aforementioned purpose, the present invention has the following structure.

(I) A shoe having a sole in the shape of a riding foot, characterized in that: the sole has a first recessed portion and a second recessed portion on the bottom surface, the first recessed portion is opposite to the heel of the user through the bottom of the first recessed portion, the second recessed portion is opposite to the big toe, the index toe and the root of the user's foot through the bottom of the second recessed portion, and the bottoms of the first recessed portion and the second recessed portion are flexible.

(II) The shoe as described in (I), wherein the wall surface of the second recessed portion extends from the end of the toe side of the sole toward the length direction of the sole, passes through the portion closer to the little toe relative to the index toe, bends toward the big toe side from the vicinity of the Yongquan point of the sole to reach the medial side of the sole.

(1) A shoe (e.g., shoe 1) comprising a foot strap (e.g., foot strap 30) formed by a front strap portion (e.g., front strap portion 31) sandwiched between the big toe and the index toe and a transverse strap portion (e.g., transverse strap portion 32) crossing the instep, and a sole (e.g., sole 20) on which the foot strap is mounted and on which the foot is supported, wherein the sole has a supporting structure. The heel portion of the user's heel and the part on the little toe side relative to the front strap portion and the toe side relative to the heel portion are missing (for example, missing portion 20c), and the missing portion is opposite to at least the middle toe, ring toe, little toe and their root portions of the user's foot and the part of the transverse head of the adductor hallucis muscle located near the heel relative to the root portion.

(2) A shoe (e.g., shoe 3) comprising a foot strap (e.g., foot strap 30) formed by a front strap portion (e.g., front strap portion 31) sandwiched between the big toe and the forefinger toe and a transverse strap portion (e.g., transverse strap portion 32) crossing the instep, and a sole (e.g., sole 20) on which the foot strap is mounted and on which the foot is supported, wherein the sole has a heel portion for supporting the heel of the user and a corresponding A thin-walled portion with reduced thickness at the little toe side of the front strap portion and at the toe side of the heel portion (for example, the missing portion 26a of the sole 25), the thin-walled portion is opposite to at least the middle toe, the ring toe, the little toe of the user's foot and their root portions and the portion of the transverse head of the adductor hallucis muscle located near the heel relative to the root portion, and is not opposite to the big toe side relative to the front strap portion.

(3) The shoe as described in (1), wherein the sole further comprises a heel missing portion in which the heel is missing.

(4) The shoe as described in (2), wherein the sole has a two-layer structure, the upper layer of one of the two-layer structure is shaped like the outer periphery of the foot without a missing portion, and the lower layer of the other of the two-layer structure has a heel portion for supporting the heel of the user and a missing portion in which the area on the little toe side of the front strap portion and on the toe side of the heel portion is missing.

(5) The shoe as described in (2), wherein the sole has a two-layer structure, the lower layer of one of the two-layer structure is shaped like the outer periphery of the foot without a missing portion, and the upper layer of the other of the two-layer structure has a heel portion for supporting the heel of the user and a missing portion in which the area on the little toe side of the front strap portion and on the toe side of the heel portion is missing.

(6) The shoe as described in (4) or (5), wherein the sole further comprises a heel missing portion in which the heel is missing.

According to (1) to (6), when a user wears the shoes of the present invention and walks, the toe side and the outer side of the sole are separated from the ground, so the user's weight is concentrated on the inner side of the sole of the user. In this way, the center of gravity of the user's legs can be corrected inward, and if the user has bow legs, the distance between the user's knees can be reduced. In this way, shoes with health-promoting functions can be provided.

(7) A shoe comprising a foot strap (e.g., foot strap 30) formed by a front strap portion (e.g., front strap portion 31) sandwiched between the big toe and the index toe of the foot and a transverse strap portion (e.g., transverse strap portion 32) crossing the instep, and a sole (e.g., sole 40) on which the foot strap is mounted and on which the foot is supported, wherein the sole has a recessed portion (e.g., recessed portion 40c) on the bottom surface, and the recessed portion is opposite to at least the middle toe, the ring toe, the little toe and the root portions thereof of the user's foot and the portion of the transverse head of the adductor hallucis muscle located near the heel relative to the root portion through the bottom of the recessed portion, and the bottom is flexible.

(8) A shoe comprising a foot strap (e.g., foot strap 30) formed by a front strap portion (e.g., front strap portion 31) sandwiched between the big toe and the forefinger toe and a transverse strap portion (e.g., transverse strap portion 32) crossing the instep, and a sole (e.g., sole 50) on which the foot strap is mounted and on which the foot is supported, wherein the sole has an upper and lower layer structure, wherein an upper layer (e.g., first layer 51) of the two-layer structure has a first missing portion (e.g., missing portion 51a) which is missing at a position opposite to the heel of the user, and a missing portion on the little toe side of the front strap portion and on the toe side of the first missing portion. The missing second missing portion (e.g., missing portion 51c), The lower layer (e.g., second layer 52) of the other layer in the two-layer structure is made of a material with higher flexibility than the upper layer and is shaped to imitate the periphery of the foot without the first missing portion and the second missing portion in the upper layer. The second missing portion is opposite to at least the middle toe, the ring toe, the little toe and their root portions of the user's foot and the portion of the transverse head of the adductor hallucis muscle located near the heel relative to the root portion. The step difference portion formed by the upper surface of the upper layer and the upper surface of the lower layer in the second missing portion has an inclined surface (e.g., inclined surface 51d).

(9) A shoe comprising a foot strap (e.g., foot strap 30) formed by a front strap portion (e.g., front strap portion 31) sandwiched between the big toe and the forefinger toe and a transverse strap portion (e.g., transverse strap portion 32) crossing the instep, and a sole (e.g., sole 60) on which the foot strap is mounted and on which the foot is supported, wherein the sole has an upper and lower layer structure, wherein an upper layer (e.g., first layer 61) of the two-layer structure has a first missing portion (e.g., missing portion 61a) in which a portion opposite to the heel of the user is missing, and a portion on the little toe side of the front strap and on the toe side of the first missing portion is missing. The second missing part (e.g., missing part 61c) of the shoe is formed in the lower layer (e.g., second layer 62) of the other layer in the two-layer structure, and the first missing part and the second missing part of the upper layer are not provided, so as to imitate the shape of the outer periphery of the foot. The second missing part is opposite to at least the middle toe, the ring toe, the little toe of the user's foot and their root parts, and the part of the transverse head of the adductor hallucis muscle located near the heel relative to the root part. The step difference part formed by the upper surface of the upper layer and the upper surface of the lower layer in the second missing part and the end of the toe side of the bottom surface of the sole have inclined surfaces (e.g., inclined surfaces 61d and 61e).

(10) A shoe comprising a foot strap (e.g., foot strap 30) formed by a front strap portion (e.g., front strap portion 31) sandwiched between the big toe and the index toe of the foot and a transverse strap portion (e.g., transverse strap portion 32) crossing the instep, and a shoe sole (e.g., shoe sole 70) mounted with the foot strap and carrying the foot, wherein the shoe sole has a feature that the area (e.g., missing portion 70c) of the shoe sole opposite to the middle toe, the ring toe, the little toe and their root portions and the portion of the transverse head of the adductor hallucis muscle located near the heel relative to the root portion is more flexible than other areas (e.g., soft sole 71).

(11) A shoe comprising a foot strap (e.g., foot strap 30) formed by a front strap portion (e.g., front strap portion 31) clamped between the big toe and the forefinger toe and a transverse strap portion (e.g., transverse strap portion 32) crossing the instep, and a sole (e.g., sole 80) on which the foot strap is mounted and on which the foot is supported, wherein the sole has a first recessed portion (e.g., heel recessed portion 80a) opposite to the heel of the user and a second recessed portion (e.g., heel recessed portion 80a) opposite to the front strap. A second recessed portion (e.g., outer recessed portion 80c) is located on the little toe side of the strap and opposite to the portion on the toe side of the first recessed portion. The second recessed portion is opposite to at least the user's middle toe, ring toe, little toe and their root portions, and the portion of the transverse head of the adductor hallucis muscle located near the heel relative to the root portion. The bottom surface of the end portion on the toe side of the sole has an inclined surface (e.g., inclined surface 80d) inclined toward the user's big toe.

(12) A shoe comprising a foot strap (e.g., foot strap 30) formed by a front strap portion (e.g., front strap portion 31) clamped by the big toe and the index toe of the foot and a transverse strap portion (e.g., transverse strap portion 32) crossing the instep, and a sole (e.g., sole 90) on which the foot strap is mounted and on which the foot is supported, wherein the bottom surface of the sole has a recessed portion (e.g., recessed portion 90a), the recessed portion is opposite to at least the big toe, the index toe and the root portion of the foot of the user through the bottom of the recessed portion, and the bottom is flexible.

(13) A shoe comprises a sole for a riding foot (e.g., sole 100), a first strap member (e.g., big toe strap 33) mounted on the sole in an arched shape and into which the big toe of the foot can be freely inserted, and a second strap member (e.g., ankle strap 34) mounted on the sole in an arched shape and further to the heel side than the first strap member and into which the instep of the foot can be freely inserted, wherein the shoe sole has an upper and lower two-layer structure, and an upper layer (e.g., first layer 101) of one of the two-layer structure comprises a first missing portion (e.g., missing portion 102) in which a portion opposite to the heel of the user is missing. The second missing part (e.g., missing part 101c) is missing on the little toe side of the first band-shaped member and on the toe side of the first missing part. The lower layer of the other layer in the two-layer structure is made of a material with higher flexibility than the upper layer and is shaped like the periphery of the foot without the first missing part and the second missing part in the upper layer. The second missing part is opposite to at least the middle toe, the ring toe, the little toe of the user's foot and their root parts, and the part of the transverse head of the adductor hallucis muscle located near the heel relative to the root part.

(14) A shoe comprising a foot strap (e.g., foot strap 30) formed by a front strap portion (e.g., front strap portion 31) sandwiched between the big toe and the index toe and a transverse strap portion (e.g., transverse strap portion 32) crossing the instep, and a sole (e.g., sole 110) on which the foot strap is mounted and on which the foot rests, wherein the bottom surface of the sole has a first recessed portion (e.g., For example, the first recessed portion 110a) and the second recessed portion (for example, the second recessed portion 110b), the first recessed portion is opposite to the user's heel through the bottom of the first recessed portion, and the second recessed portion is opposite to the user's big toe, index toe and the root part of the foot through the bottom of the second recessed portion, and the bottoms of the first recessed portion and the second recessed portion are flexible.

(15) A shoe comprising a foot strap (e.g., foot strap 30) formed by a front strap portion (e.g., front strap portion 31) sandwiched between the big toe and the index toe of the foot and a transverse strap portion (e.g., transverse strap portion 32) crossing the instep, and a sole (e.g., sole 120) on which the foot strap is mounted and on which the foot is supported, wherein the sole has a gap portion (e.g., recessed portion 121c) extending from the center portion in the thickness direction of the side surface of the foot strap on the little toe side toward the big toe side, and the gap portion is opposite to at least the middle toe, the ring toe, the little toe of the user's foot and their root portions, and a portion of the transverse head of the adductor hallucis muscle closer to the heel than the root portion.

(16) A shoe comprising a foot strap (e.g., foot strap 30) formed by a front strap portion (e.g., front strap portion 31) clamped between the big toe and the forefinger toe and a transverse strap portion (e.g., transverse strap portion 32) crossing the instep, and a sole (e.g., sole 130) on which the foot strap is mounted and on which the foot is supported, wherein the sole has a two-layer structure, an upper layer (e.g., first layer 131) of the two-layer structure comprises a first block (e.g., first block 131a) on which the front strap portion is disposed and a terminal end portion (e.g., first block 131a) on which the transverse strap portion is disposed. The second block (e.g., the second block 131b), the lower layer (e.g., the second layer 132) of the other layer in the two-layer structure is made of a material with higher flexibility than the upper layer and has a shape imitating the periphery of the foot, a first recessed portion is formed between the first block and the second block, and a second recessed portion is formed on the heel side relative to the second block and opposite to the user's heel, and the first recessed portion is opposite to at least the user's middle toe, ring toe, little toe and their root portions and a portion of the transverse head of the adductor hallucis muscle closer to the heel relative to the root portion.

(17) A shoe comprising a foot strap (e.g., foot strap 30) formed by a front strap portion (e.g., front strap portion 31) sandwiched between the big toe and the index toe and a transverse strap portion (e.g., transverse strap portion 32) crossing the instep, and a sole (e.g., sole 140) on which the foot strap is mounted and on which the foot is supported, wherein the sole has an upper and lower two-layer structure, wherein an upper layer (e.g., first layer 141) of the two-layer structure has a first missing portion (e.g., missing portion 141a) in which a portion opposite to the heel of the user is missing, and a missing portion on the side of the little toe opposite to the front strap portion and opposite to the heel of the user. The second missing part (e.g., missing part 141c) is missing at the toe side of the first missing part. The lower layer (e.g., second layer 142) of the other layer in the two-layer structure is made of a material with higher flexibility than the upper layer. The first missing part and the second missing part in the upper layer are not provided, and the shape is imitated by the outer periphery of the foot. The second missing part is opposite to at least the middle toe, the ring toe, the little toe and the root parts of the user's foot, and the part of the transverse head of the adductor hallucis muscle located near the heel relative to the root part. The bottom surface of the sole has inclined surfaces at the end of the toe side and the end of the heel side.

According to (7) to (11), (13), (15) to (17), when a user walks in the shoes of the present invention, the toe-side and outer side of the sole (the user's middle toe, ring toe, little toe and their root parts and the part of the transverse head of the adductor hallucis muscle located near the heel relative to the root part) are separated from the ground, so the user's body weight is concentrated on the inner side of the user's sole. In this way, the center of gravity of the user's legs can be corrected inward, and if the user has bow legs, the distance between the user's knees can be reduced. In this way, it is possible to provide shoes with health-promoting functions.

According to (12) and (14), when a user walks in the shoes of the present invention, the toe-side and medial side of the sole (the big toe, index toe and their root parts of the user's foot and the part of the transverse head of the adductor hallucis muscle located near the heel relative to the root part) are opposite to the concave part. Therefore, when walking, the big toe, index toe and their root parts of the user are easy to tilt to the medial side. In this way, the center of gravity of the user's legs can be corrected inward, and if the user has bow legs, the distance between the user's knees can be reduced. In this way, it is possible to provide shoes with health-promoting functions.

(18) A shoe comprising a foot strap (e.g., foot strap 30) formed by a front strap portion (e.g., front strap portion 31) clamped between the big toe and the index toe of the foot and a transverse strap portion (e.g., transverse strap portion 32) crossing the instep, and a sole (e.g., sole 150) on which the foot strap is mounted and on which the foot is supported, wherein the sole is formed of a flat plate member and has a missing portion (e.g., missing portion 150a) in which a portion opposite to the heel of the user is missing.

(19) A shoe comprising a foot strap (e.g., foot strap 30) formed by a front strap portion (e.g., front strap portion 31) clamped between the big toe and the index toe and a transverse strap portion (e.g., transverse strap portion 32) crossing the instep, and a sole (e.g., sole 160) on which the foot strap is mounted and on which the foot is supported, wherein the sole is formed of a flat plate member and has a recessed portion (e.g., missing portion 161a) at a position opposite to the heel of the user, and the end of the bottom surface of the sole on the toe side has an inclined surface (e.g., inclined surfaces 161b, 162a).

According to (18) and (19), since the lower part of the heel becomes a space, the user can walk on tiptoe and naturally exercise the calf and the muscles from the back of the thigh to the buttocks by walking in the shoes. In this way, it is possible to provide shoes with health-promoting functions.

In particular, according to (8), (9), (17), and (19), the bottom surface of the sole has inclined surfaces at the ends on the toe side and the heel side. Therefore, when walking, the inclined surface on the bottom surface side of the toe portion contacts the ground, and the center of gravity moves smoothly during walking, making it easier for the user to walk.

In particular, according to (11), since the bottom surface of the end of the toe side of the sole has an inclined surface (e.g., inclined surface 80d) inclined toward the user's big toe, the user's big toe, middle toe, and their root parts are easily inclined toward the inner side. In this way, the center of gravity of the user's leg can be corrected toward the inner side, and if the user has bow legs, the distance between the user's knees can be reduced. In this way, it is possible to provide shoes with health-promoting functions.

According to the present invention, it is possible to provide shoes with health-promoting functions.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16: shoes

20, 25, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160: soles

20a, 40a, 70a, 121a: Heel

20b, 40b, 51b, 61b, 70b, 80b, 101b, 121b, 141b: Toe

20c, 20d, 26a, 51a, 51c, 61a, 61c, 70c, 101a, 101c, 141a, 141c, 150a, 160a, 161a: missing parts

26, 51, 61, 101, 121, 131, 141, 161: First level

27, 52, 62, 102, 122, 132, 142, 162: Second level

30: Clip-on ankle straps

31: Anterior ligament

32: Horizontal straps

32a: Inner transverse ligament

32b: Outer transverse ligament

33: Hallux strap

34: Ankle strap

40c, 80a, 90a, 121c, 133a, 133b: Depression

51d, 61d, 61e, 62a, 80d, 142a, 142b, 161b, 162a: inclined surface

71: Soft bottom

80a: Heel depression

80c: Outer concave part

110a: first recessed portion

110b: Second recessed portion

131a: The first block

131b: Second block

[Figure 1] is a three-dimensional diagram showing the appearance of a shoe 1 according to the first embodiment of the present invention.

[Figure 2] is the front view of Figure 1.

[Figure 3] is a three-dimensional diagram showing the appearance of a shoe 2 of a modified example of the first embodiment of the present invention.

[Figure 4] is a three-dimensional diagram showing the appearance of the shoe 3 of the second embodiment of the present invention.

[Figure 5] is the front view of Figure 4.

[Figure 6] is a three-dimensional diagram showing the appearance of a shoe 3 of a modified example of the second embodiment of the present invention.

[Figure 7A] is a top view showing the appearance of the shoe 4 of the third embodiment of the present invention.

[Figure 7B] is a top view showing the back side of Figure 7A.

[Figure 7C] is a side view of Figure 7A viewed from the little toe side.

[Figure 8A] is a top view showing the appearance of the shoe 5 of the fourth embodiment of the present invention.

[Figure 8B] is a top view showing the back side of Figure 8A.

[Figure 8C] is a side view of Figure 8A viewed from the little toe side.

[Figure 8D] is a front view of Figure 8A.

[Figure 9A] is a top view showing the appearance of the shoe 6 of the fifth embodiment of the present invention.

[Figure 9B] is a top view showing the back side of Figure 9A.

[Figure 9C] is a side view of Figure 9A viewed from the little toe side.

[Figure 9D] is a front view of Figure 9A.

[Figure 10A] is a top view showing the appearance of the shoe 7 of the sixth embodiment of the present invention.

[Figure 10B] is a top view showing the back side of Figure 10A.

[Figure 10C] is a side view of Figure 10A viewed from the little toe side.

[Figure 11A] is a top view showing the appearance of the shoe 8 of the seventh embodiment of the present invention.

[Figure 11B] is a top view showing the back side of Figure 11A.

[Figure 11C] is a side view of Figure 11A viewed from the little toe side.

[Figure 11D] is a front view of Figure 11A.

[Figure 12A] is a top view showing the appearance of the shoe 9 of the eighth embodiment of the present invention.

[Figure 12B] is a top view showing the back side of Figure 12A.

[Figure 12C] is a side view of Figure 12A viewed from the little toe side.

[Figure 12D] is a front view of Figure 12A.

[Figure 13A] is a top view showing the appearance of the shoe 10 of the ninth embodiment of the present invention.

[Figure 13B] is a top view showing the back side of Figure 13A.

[Figure 13C] is a side view of Figure 13A viewed from the little toe side.

[Figure 13D] is a front view of Figure 13A.

[Figure 14A] is a top view showing the appearance of the shoe 11 of the tenth embodiment of the present invention.

[Figure 14B] is a top view showing the back side of Figure 14A.

[Figure 14C] is a side view of Figure 14A viewed from the little toe side.

[Figure 14D] is a front view of Figure 14A.

[Figure 15A] is a top view showing the appearance of the shoe 12 of the eleventh embodiment of the present invention.

[Figure 15B] is a top view showing the back side of Figure 15A.

[Figure 15C] is a side view of Figure 15A viewed from the little toe side.

[Figure 16A] is a top view showing the appearance of the shoe 13 of the twelfth embodiment of the present invention.

[Figure 16B] is a top view showing the back side of Figure 16A.

[Figure 16C] is a side view of Figure 16A viewed from the little toe side.

[Figure 16D] is a front view of Figure 16A.

[Figure 17A] is a top view showing the appearance of the shoe 14 of the thirteenth embodiment of the present invention.

[Figure 17B] is a top view showing the back side of Figure 17A.

[Figure 17C] is a side view of Figure 17A viewed from the little toe side.

[Figure 17D] is a front view of Figure 17A.

[Figure 18A] is a top view showing the appearance of the shoe 15 of the fourteenth embodiment of the present invention.

[Figure 18B] is a top view showing the back side of Figure 18A.

[Figure 18C] is a side view of Figure 18A viewed from the little toe side.

[Figure 19A] is a top view showing the appearance of the shoe 16 of the fifteenth embodiment of the present invention.

[Figure 19B] is a top view showing the back side of Figure 19A.

[Figure 19C] is a side view of Figure 19A viewed from the little toe side.

[Figure 19D] is a front view of Figure 19A.

The following is a detailed description of the embodiments of the present invention with reference to the drawings.

[First embodiment]

FIG1 is a three-dimensional diagram showing the appearance of a shoe 1 of the first embodiment of the present invention. FIG2 is a front view of FIG1. The shoe 1 is a so-called beach sandal and includes a sole 20 and a foot strap 30. In addition, FIG1 and FIG2 show a shoe 1 for the left foot of the user, and the shoe 1 for the right foot is symmetrical with the shoe 1 for the left foot, so the detailed description of the shoe 1 for the right foot is omitted.

The sole 20 is made of rubber material or EVA urethane material, and is a flat plate-shaped component that imitates the outer periphery of the foot, including a heel portion 20a for carrying the user's heel and a toe portion 20b for carrying the user's toes.

The foot strap 30 is made of cloth or synthetic resin, and is composed of a front strap portion 31 and a transverse strap portion 32. The front strap portion 31 is a portion extending upward from the plate surface of the sole 20 and is sandwiched between the big toe and the index toe of the user's foot, and is arranged at the toe portion 20b of the sole 20. The transverse strap portion 32 is made of a rope-shaped or belt-shaped member made of cloth or synthetic resin, and is divided into two parts, an inner transverse strap portion 32a extending to the side of the big toe side of the sole 20 (hereinafter referred to as the inner side) and an outer transverse strap portion 32b extending to the side of the little toe side (hereinafter referred to as the outer side) with the front strap portion 31 as the base end. The end portions of the inner lateral strap portion 32a and the outer lateral strap portion 32b are respectively fixed to the two side portions of the arch area of the sole 20.

The sole 20 has a missing portion 20c on the little toe side relative to the front lace portion 31. The missing portion 20c is formed by cutting along the long side direction of the sole 20 from the end of the toe side of the sole 20, through a portion approximately close to the little toe relative to the front lace portion 31, through a portion approximately close to the toe relative to the terminal end of the outer lateral lace portion 32b, to the outer side portion of the sole 20, in a gentle arc shape.

Next, the state of the user wearing the shoe 1 is explained.

The user puts the foot through the clip 30 and can wear the shoe 1 thus constructed by clamping the front strap 31 between the big toe and the index toe of the user's foot. At this time, the inner transverse strap 32a is put over the base of the user's big toe, and the outer transverse strap 32b is put over the user's instep, so that the shoe 1 is difficult to be removed from the user's foot.

When the user wears the shoe 1, the missing portion 20c is opposite to the user's middle toe, ring toe, little toe and their root parts; the part of the lateral head of the adductor hallucis muscle located near the heel relative to the root part; and the part of the arch of the foot in the flexor digiti minimi brevis. In other words, when the sole is divided into the toe side and the heel side near the arch and the toe side is further divided into the big toe side (inside) and the little toe side (outside), the missing portion 20c is roughly opposite to the outer half of the toe side.

Therefore, when the user walks in the shoe 1, the user's weight is concentrated on the inner side of the user's sole because the outer half of the toe side of the sole is separated from the ground. Furthermore, when the user stands or walks, he or she becomes aware that the outer side of the sole opposite to the missing part 20c does not touch the ground. In this way, the center of gravity of the user's legs can be corrected inward, and if the user has bow legs, the distance between the user's knees can be reduced.

According to the present embodiment thus constructed, by wearing shoes, the user's body weight is concentrated on the inner side of the sole, and the center of gravity of the user's legs can be corrected inward, and the distance between the user's knees can be reduced. In this way, when changing into a swimsuit at the beach, the user can walk without worrying about bowed legs. In addition, according to the present embodiment, when eyelet patches are attached to the outer eyelets of the sole, by wearing shoes 1, the area attached with the eyelet patches can be separated from the ground, so it is also possible to expect the effect of reducing the slippage or fall-off of the eyelet patches during walking.

[Variation of the first embodiment]

FIG3 is a three-dimensional diagram showing the appearance of a shoe 2 of a modified example of the first embodiment of the present invention. The shoe 2 of the modified example of the first embodiment is a shoe 1 of the first embodiment shown in FIG1, and the sole 20 is further formed with a missing portion 20d in which the heel portion is missing. This missing portion 20d can be called a heel missing portion.

According to the modification of the first embodiment thus constructed, since the shoe 2 has the missing portion 20d, the user walks on tiptoe, and by walking in the shoe 2, the muscles of the calf and the back of the thigh to the buttocks can be naturally exercised. Furthermore, since the shoe 2 has the missing portion 20d, as described above, the center of gravity of the user's leg can be corrected inward, and if the user has bow legs, the distance between the user's knees can be reduced.

FIG. 4 is a three-dimensional diagram showing the appearance of a shoe 3 of the second embodiment of the present invention. FIG. 5 is a front view of FIG. 4. Furthermore, by attaching the same symbols to the components that are the same as those shown in FIG. 1 and FIG. 2 or components that have the same functions, detailed descriptions are omitted.

The shoe 3 includes a sole 25 and a shoe strap 30. The shoe 3 is different from the shoe 1 of the first embodiment in that the sole 20 of the first embodiment is replaced by the sole 25.

The sole 25 is a two-layer structure of a first layer 26 and a second layer 27. The first layer 26 has a missing portion 26a. In addition to the chamfer formed at the corner of the toe of the sole 20 of the shoe 1 of the first embodiment, the first layer 26 has the same or different thickness shape, and the missing portion 26a is formed at the same position as the missing portion 20c of the sole 20 of the shoe 1.

The second layer 27 is a shape that imitates the outer circumference of the foot without forming the missing portion 26a in the first layer 26. The sole 25 is formed by bonding the lower surface of the first layer 26 and the upper surface of the second layer 27, and forming a height difference at the location of the missing portion 26a.

The shoe 3 is completed by installing the same foot strap 30 as the shoe 1 of the first embodiment on the sole 25.

When the user wears the shoe 3, the outer side of the toe side of the user's sole faces the upper surface of the second layer 27 with the height difference caused by the missing part 26a.

Therefore, the shoe 3 of the second embodiment is the same as the shoe 1 of the first embodiment. When the user stands while wearing the shoe 1, the user's body weight is concentrated on the inner side of the user's sole. In this way, the center of gravity of the user's legs can be corrected inward, and if the user has bow legs, the distance between the user's knees can be reduced. Furthermore, since the lower part of the missing part 26a is covered by the second layer 27, when the shoe 3 is used on the beach, the heel will not directly contact the sand on the beach.

[Variation of the second embodiment]

The shoe 3 of the second embodiment can also swap the first layer 26 and the second layer 27 of the sole 25, with the second layer 27 being the upper layer and the first layer 26 being the lower layer.

The variant of the second embodiment constructed in this way can also play the same role and effect as the shoe 3 of the second embodiment.

Furthermore, the shoe 3 of the second embodiment can also be the same as the shoe 2 of the modified example of the first embodiment, and the heel part of the sole 25 is missing. Thereby, the user can walk on tiptoe and naturally exercise the muscles of the calf and the back of the thigh to the buttocks. Furthermore, in the example shown in FIG3, the heel part is missing in an arc shape, and it can also be missing in a straight line as shown in FIG6.

Furthermore, as shown in FIG3 and FIG6, the second layer 27 of the shoe 3 of the second embodiment can be bonded to the lower surface of the shoe with the heel missing in an arc shape to form a two-layer structure. In this way, the heel will not directly contact the sand on the beach.

In addition, in the second embodiment and its variant, the sole 25 is formed in two layers, but if a thin-walled portion is formed at the portion of the sole opposite to the outer side of the user's foot to reduce the thickness of the plate, it may be a single layer (single plate).

[Third embodiment]

FIG. 7A is a top view showing the appearance of a shoe 4 of the third embodiment of the present invention. FIG. 7B is a top view showing the back of FIG. 7A. FIG. 7C is a side view of FIG. 7A viewed from the little toe side. The shoe 4 is a so-called beach sandal and includes a sole 40 and a foot strap 30. In addition, FIG. 7A shows a shoe 4 for the left foot of the user, and the shoe 4 for the right foot is symmetrical with the shoe 4 for the left foot, so the detailed description of the shoe 1 for the right foot is omitted. Furthermore, the same symbols are attached to the same components as those shown in FIG. 1 and FIG. 2 or components with the same functions, and the detailed description is omitted.

The sole 40 is made of rubber material or EVA urethane material, and is a flat plate-shaped component that imitates the outer periphery of the foot, including a heel portion 40a for carrying the user's heel and a toe portion 40b for carrying the user's toes.

The front strap portion 31 of the foot strap 30 is a portion extending upward from the board surface of the sole 40 and is clamped by the big toe and the index toe of the user's foot, and is arranged at the toe portion 40b of the sole 40. The lateral strap portion 32 is divided into two parts, the inner lateral strap portion 32a extending to the side of the big toe side of the sole 40 (hereinafter referred to as the inner side) and the outer lateral strap portion 32b extending to the side of the little toe side (hereinafter referred to as the outer side) with the front strap portion 31 as the base end. The terminal portions of the inner lateral strap portion 32a and the outer lateral strap portion 32b are respectively fixed to the two sides of the arch area of the sole 40.

As shown in Fig. 7B and Fig. 7C, the sole 40 has a recessed portion 40c on the bottom surface on the little toe side relative to the front lace portion 31. The wall surface of the recessed portion 40c extends in a gentle arc shape from the end of the toe side of the sole 40 to the long side direction of the sole 40, through a portion approximately close to the little toe relative to the front lace portion 31, through a portion approximately close to the toe relative to the terminal end of the outer transverse lace portion 32b, and reaches the outer side portion of the sole 20. The outer periphery of the recessed portion 40c is open. In other words, the shoe 4 of the third embodiment is a structure in which a plate is extended from the upper part of the missing portion 20c to the outer side portion in the shoe 1 of the first embodiment shown in Fig. 1, and the upper part of the missing portion 20c is covered by the extended portion. Since the bottom of the recessed portion 40c is thin-walled, it has flexibility in the up and down directions.

When the user wears the shoe 4, the recessed portion 40c is opposite to the user's middle toe, ring toe, little toe and their root parts; the part of the lateral head of the adductor hallucis muscle located near the heel relative to the root part; and the part of the lateral side of the arch of the foot in the flexor digiti minimi brevis muscle. In other words, when the sole is divided into the toe side and the heel side near the arch and the toe side is further divided into the medial side (big toe side) and the lateral side (little toe side), the recessed portion 40c is roughly opposite to the lateral half of the toe side through the bottom of the recessed portion 40c.

When the user walks in the shoe 4, the bottom surface of the outer half of the toe side of the sole, that is, the bottom surface of the recessed portion 40c, is separated from the ground. Therefore, walking becomes unstable. In order to maintain walking balance, the user will concentrate the body weight on the inner side of the user's sole. Furthermore, when standing or walking, the user becomes aware that the bottom surface of the recessed portion 40c does not touch the ground. In this way, the center of gravity of the user's legs can be corrected inward, and if the user has O-shaped legs, the distance between the user's knees can be reduced.

According to the third embodiment thus constructed, it is expected to have the same effect as the first embodiment, and it is possible to prevent the sole of the foot from getting dirty or directly stepping on a protrusion when using the shoe 4.

[Fourth embodiment]

FIG8A is a top view showing the appearance of the shoe 5 of the fourth embodiment of the present invention. FIG8B is a top view showing the back of FIG8A. FIG8C is a side view of FIG8A viewed from the little toe side. FIG8D is a front view of FIG8A. The shoe 5 is a so-called beach sandal and includes a sole 50 and a foot strap 30. In addition, FIG8A shows a shoe 5 for the left foot of the user. The shoe 5 for the right foot is symmetrical with the shoe 5 for the left foot, so the detailed description of the shoe 5 for the right foot is omitted. Furthermore, the same symbols are attached to the same components as those shown in FIG1 and FIG2 or components with the same functions, and the detailed description is omitted.

The shoe 5 is different from the shoe 1 of the first embodiment in that the sole 20 of the first embodiment is the sole 50.

The sole 50 is made of a rubber material or an EVA urethane material, and as shown in FIG8C and FIG8D , it is a two-layer structure of a first layer 51 and a second layer 52. The first layer 51 has a missing portion 51a where the user's heel is missing, a toe portion 51b where the user's toe is carried, and a missing portion 51c where the user's middle toe, ring toe, little toe and the root of the user's foot are missing. Furthermore, as shown in FIG8A and FIG8D , the edge of the missing portion 51c of the first layer 51 is formed with a downwardly inclined slope 51d.

The missing portion 51c is formed by cutting along the long side direction of the sole 50 from the end of the toe side of the first layer 51, through a portion approximately close to the little toe relative to the front lace portion 31, through a portion approximately close to the toe relative to the terminal end of the outer lateral lace portion 32b, to the outer side portion of the sole 40, in a gentle arc shape.

As shown in FIG8B , the second layer 52 does not form the missing portion 51a and the missing portion 51c in the first layer 51, and is shaped like the periphery of the foot. The sole 50 is formed by bonding the lower surface of the first layer 51 and the upper surface of the second layer 52, and a height difference is formed at the missing portion 51a and the missing portion 51c by the upper surface of the first layer 51 and the upper surface of the second layer 52. An inclined surface 51d is formed at this height difference portion. The second layer 52 is made of a material that is more flexible than the first layer 51.

The shoe 3 is completed by installing the same clip 30 as the shoe 1 of the first embodiment on the sole 50.

When the user wears the shoe 5, the heel of the user's sole faces the missing portion 51a, and the missing portion 51c faces the middle toe, the ring toe, the little toe and their root portions, the portion of the lateral head of the adductor hallucis muscle located near the heel relative to the root portion, and the lateral portion of the arch of the foot in the flexor digitorum brevis muscle. The outer side of the heel and toe of the user's sole faces the upper surface of the second layer 52 separated by the height difference caused by the missing portion 51a and the missing portion 51c.

The shoe 5 of the fourth embodiment constructed in this way can obtain the same effect as the shoe 1 of the first embodiment. Furthermore, by having the missing portion 51a, the user is in a posture of walking on tiptoe, and by walking in the shoe 5, the muscles of the calf and from the back of the thigh to the buttocks can be naturally exercised. Furthermore, the edge of the missing portion 51c is formed with an inclined surface 51d that is inclined downward toward the upper surface of the second layer 52. Therefore, when a lateral impact is applied to the user, such as when colliding with a person, the sole of the user will abut against the inclined surface 51d. Thereby, the user can easily maintain balance. Moreover, since the second layer 52 is made of a highly soft material, when the sole of the foot contacts the second layer 52, the second layer 52 will be elastically deformed to a large extent. As a result, the user's balance becomes unstable, and in order to maintain a stable state, the user's body weight is concentrated on the inner side of the sole of the user's foot. Furthermore, since at least the second layer 52 is interposed between the ground and the sole, it is possible to prevent the sole from getting dirty or directly stepping on a protrusion when using the shoe 5.

[Fifth embodiment]

FIG. 9A is a top view showing the appearance of a shoe 6 of the fifth embodiment of the present invention. FIG. 9B is a top view showing the back of FIG. 9A. FIG. 9C is a side view of FIG. 9A viewed from the little toe side. FIG. 9D is a front view of FIG. 9A. The shoe 6 is a so-called beach sandal and includes a sole 60 and a foot strap 30. In addition, FIG. 9A shows a shoe 6 for the left foot of the user, and the shoe 6 for the right foot is symmetrical with the shoe 6 for the left foot, so the detailed description of the shoe 6 for the right foot is omitted. Furthermore, the same symbols are attached to the same components as those shown in FIG. 1 and FIG. 2 or components with the same functions, and the detailed description is omitted.

The shoe 6 is different from the shoe 1 of the first embodiment in that the sole 20 of the first embodiment is the sole 60.

As shown in FIG. 9C and FIG. 9D , the sole 60 is a two-layer structure of a first layer 61 and a second layer 62. The first layer 61 has a missing portion 61a where the heel of the user is missing, a toe portion 61b where the toe of the user is carried, and a missing portion 61c where the middle toe, ring toe, little toe and the vicinity of the root of the user's foot are missing. The edge of the missing portion 61c of the first layer 61 is formed with a downwardly inclined slope 61d. Furthermore, the back side of the toe portion of the first layer 61 is formed with an inclined surface 61e that is inclined upward toward the toe side.

As shown in FIG. 9B , the second layer 62 does not form the missing portion 61a and the missing portion 61c of the first layer 61, and is formed in a shape that imitates the outer periphery of the foot. The second layer 62 has the same hardness as the first layer 61. The back side of the toe portion of the second layer 62 is formed with an inclined surface 62a that is inclined upward toward the toe side. The sole 60 is formed by bonding the lower surface of the first layer 61 and the upper surface of the second layer 62. Thereby, a height difference is formed at the position of the missing portion 61a and the missing portion 61c by the upper surface of the first layer 61 and the upper surface of the second layer 62. The inclined surface 61d is formed at this height difference portion. Furthermore, by overlapping the inclined surface 61e of the first layer 61 and the inclined surface 62a of the second layer 62, an inclined surface inclined upward toward the toe side is formed on the back side of the toe side of the sole 60.

The shoe 6 is completed by installing the same foot strap 30 as the shoe 1 of the first embodiment on the sole 60.

When the user wears the shoe 6, the heel portion and the outer side portion of the toe side of the user's sole face the upper surface of the second layer 62 with the height difference caused by the missing portion 61a and the missing portion 61c. In other words, the shoe 6 of the fifth embodiment of the present invention is formed with an inclined surface inclined upward toward the toe side on the back side of the toe portion of the shoe 5 of the fourth embodiment, and is composed of the same components as the first layer 51 and the second layer 52 or components with the same hardness.

The shoe 6 of the fifth embodiment constructed in this way can achieve the same effect as the shoe 4 of the fourth embodiment. Furthermore, a slope is formed on the back side of the toe portion, and the bottom surface of the toe portion contacts the ground through the slope when walking, and the center of gravity moves smoothly when walking, which can make the user's walking easier.

[Sixth embodiment]

FIG. 10A is a top view showing the appearance of a shoe 7 of the sixth embodiment of the present invention. FIG. 10B is a top view showing the back side of FIG. 10A. FIG. 10C is a side view of FIG. 10A viewed from the little toe side. The shoe 7 is a so-called beach sandal and includes a sole 70, a soft sole 71, and a foot strap 30. In addition, FIG. 10A shows a shoe 7 for the user's left foot, and the shoe 7 for the right foot is symmetrical with the shoe 7 for the left foot, so the detailed description of the shoe 7 for the right foot is omitted. Furthermore, the same symbols are attached to the same components as those shown in FIG. 1 and FIG. 2 or components with the same functions, and the detailed description is omitted.

The sole 70 is made of rubber material or EVA urethane material, and is a flat plate-shaped component that imitates the outer periphery of the foot, including a heel portion 70a for carrying the user's heel and a toe portion 70b for carrying the user's toes.

As shown in FIG. 10B , the sole 70 further has a missing portion 70c on the little toe side relative to the front lace portion 31. The missing portion 70c is formed by cutting along the long side direction of the sole 70 from the end of the toe side of the sole 70, through a portion approximately close to the little toe relative to the front lace portion 31, through a portion approximately close to the toe relative to the terminal end of the outer lateral lace portion 32b, to the outer side portion of the sole 70, in a gentle arc shape.

The soft sole 71 is formed by a soft member having higher softness than the sole 70 and is fixed to the missing portion 70c of the sole 70. A single foot-shaped plate is formed by fixing the soft sole 71 to the sole 70. A foot-shaped plate is formed by placing the soft sole 71 on the missing portion 70c of the sole 70.

Then, the soft sole 71 is fixed to the missing portion 70c of the sole 70, and the clip 30 is installed on the sole 70 like the sole 20 of the shoe 1 of the first embodiment to form the shoe 7.

When the user wears the shoe 7, the soft sole 71 faces the middle toe, the ring toe, the little toe and their root parts of the user's foot sole; the part of the lateral head of the adductor hallucis muscle located near the heel relative to the root part; and the lateral part of the arch of the foot in the flexor digitorum brevis muscle.

According to the sixth embodiment thus constructed, when the user walks in the shoe 7, the outer half of the toe side of the sole of the foot is placed on the soft sole 71, and the soft sole 71 sinks significantly. Therefore, walking becomes unstable. In order to maintain walking balance, the user will concentrate the weight on the inner side of the user's sole. Furthermore, when standing or walking, the user becomes aware of not stepping on the soft sole 71. In this way, the center of gravity of the user's legs can be corrected inward, and if the user has O-shaped legs, the distance between the user's knees can be reduced. Furthermore, by fixing the soft sole 71 by the missing portion 51a, it is possible to prevent the sole from getting dirty or directly stepping on a protrusion when using the shoe 7.

[Seventh embodiment]

FIG. 11A is a top view showing the appearance of a shoe 8 of the seventh embodiment of the present invention. FIG. 11B is a top view showing the back of FIG. 11A. FIG. 11C is a side view of FIG. 11A viewed from the little toe side. FIG. 11D is a front view of FIG. 11A. The shoe 8 is a so-called beach sandal and includes a sole 80 and a foot strap 30. In addition, FIG. 11A shows a shoe 8 for the left foot of the user, and the shoe 8 for the right foot is symmetrical with the shoe 8 for the left foot, so the detailed description of the shoe 8 for the right foot is omitted. Furthermore, the same symbols are attached to the same components as those shown in FIG. 1 and FIG. 2, and the detailed description is omitted.

The sole 80 is made of rubber material or EVA urethane material, etc., and is a flat plate-shaped component that imitates the outer periphery of the foot, including a heel recess 80a for carrying the user's heel; a toe portion 80b for carrying the user's toe; an outer side recess 80c opposite to the user's middle toe, ring toe, little toe and their roots; and an inclined surface 80d formed at the front end of the bottom surface as shown in Figures 11B to 11D.

The foot strap 30 is fixed to the toe portion 80b. The heel recess 80a, the outer recess 80c and the inclined surface 80d of the sole 80 are formed by cutting a single plate-like member.

The bottom surfaces of the heel recess 80a and the outer side recess 80c are lower than the upper surface of the toe portion 80b, and a height difference is formed by the upper surface of the toe portion 80b, the bottom surfaces of the heel recess 80a and the outer side recess 80c. As shown in FIG. 11A , the wall surface of the heel recess 80a forms a bulging arc shape on the toe side, and the outer periphery of the heel recess 80a is open. The wall surface of the lateral recessed portion 80c extends from the end of the toe side of the sole 80 to the long side direction of the sole 80, through a portion approximately close to the little toe relative to the front lace portion 31, and through a portion approximately close to the toe relative to the terminal end of the outer transverse lace portion 32b, to the lateral side portion of the sole 80 in a gentle arc shape. The outer periphery of the lateral recessed portion 80c is open. Furthermore, as shown in Figures 11B to 11D, the inclined surface 80d is gently inclined from the boundary area between the toe portion 80b and the lateral recessed portion 80c to the user's big toe side.

When the user wears the shoe 8, the lateral recessed portion 80c is opposite to the user's middle toe, ring toe, little toe and their root parts; the part of the lateral head of the adductor hallucis muscle located near the heel relative to the root part; and the part of the arch of the foot in the flexor digiti minimi brevis. In other words, when the sole is divided into the toe side and the heel side near the arch and the toe side is further divided into the medial side (big toe side) and the lateral side (little toe side), the lateral recessed portion 80c is roughly opposite to the lateral half of the toe side. Furthermore, the user's heel is opposite to the heel recessed portion 80a.

When the user walks in the shoe 8, the bottom surface of the outer half of the toe side of the sole, that is, the bottom surface of the outer recessed portion 80c, separates from the ground. Therefore, walking becomes unstable. In order to maintain walking balance, the user will concentrate the body weight on the inner side of the user's sole. Furthermore, when standing or walking, the user will be aware that the bottom surface of the outer recessed portion 80c does not touch the ground. In this way, the center of gravity of the user's legs can be corrected inward, and if the user has bow legs, the distance between the user's knees can be reduced. Furthermore, by having the heel recess 80a, the user can walk on tiptoe, and by walking in the shoe 7, the muscles of the calf and the back of the thigh to the buttocks can be naturally exercised. Furthermore, since the inclined surface 80d is formed, the user's big toe is easy to fall inward when walking, so the center of gravity of the user's leg can be corrected inward.

According to the seventh embodiment thus constructed, the same effect as the first embodiment can be expected, and the sole of the foot can be prevented from getting dirty or stepping directly on a protrusion when using the shoe 8. In addition, although the sole 80 of the shoe 8 is composed of a single plate-like component, it can also be a two-layer structure like the shoe 6 of the fifth embodiment to form a height difference.

[Eighth embodiment]

FIG. 12A is a top view showing the appearance of a shoe 9 of the eighth embodiment of the present invention. FIG. 12B is a top view showing the back side of FIG. 12A. FIG. 12C is a side view of FIG. 12A viewed from the little toe side. FIG. 12D is a front view of FIG. 12A. The shoe 9 is a so-called beach sandal and includes a sole 90 and a foot strap 30. In addition, FIG. 12A shows a shoe 9 for the left foot of the user, and the shoe 9 for the right foot is symmetrical with the shoe 9 for the left foot, so the detailed description of the shoe 9 for the right foot is omitted. Furthermore, the same symbols are attached to the same components as those shown in FIG. 1 and FIG. 2, and the detailed description is omitted.

The sole 90 is made of rubber material or EVA urethane material, and is a flat plate-shaped member that imitates the periphery of the foot. As shown in FIG. 12B to FIG. 12D , the sole 90 has a recessed portion 90a on the opposite side of the area of the bottom surface that faces the user's big toe, middle toe, and their roots.

The foot strap 30 is fixed to the sole 90 at the same position as the shoe 1 of the first embodiment shown in FIG. 1. The recessed portion 90a of the sole 90 is formed by cutting a single plate-shaped member. The end of the front strap portion 31 is fixed to the area where the recessed portion 90a is formed.

As shown in FIG. 12B , the wall surface of the recessed portion 90a extends in a gentle arc from the end of the toe side of the sole 90 toward the long side direction of the sole 90, through a portion approximately close to the little toe relative to the front lace portion 31, through a portion approximately close to the toe relative to the terminal end of the inner transverse lace portion 32a, and reaches the inner side portion of the sole 90. As shown in FIG. 12C and FIG. 12D , the outer periphery of the recessed portion 90a is open. The bottom of the recessed portion 90a is thin-walled and thus flexible.

When the user wears the shoe 9, the concave portion 90a is opposite to the big toe, the index toe and the root portion of the user's foot and the part of the transverse head of the adductor hallucis muscle located near the heel relative to the root portion through the bottom of the concave portion 90a. The bottom of the concave portion 90a is flexible because it is thin-walled.

When the user walks in the shoe 9 thus constructed, the bottom surface of the inner half of the toe side of the sole, that is, the bottom surface of the recessed portion 90a, is separated from the ground. Since the bottom of the recessed portion 90a is thin-walled, it is more flexible than other parts. Therefore, when walking, the user's big toe, middle toe and their roots tend to tilt inward. In this way, the center of gravity of the user's legs can be corrected inward, and if the user has bow legs, the distance between the user's knees can be reduced.

[Ninth embodiment]

FIG. 13A is a top view showing the appearance of the shoe 10 of the ninth embodiment of the present invention. FIG. 13B is a top view showing the back side of FIG. 13A. FIG. 13C is a side view of FIG. 13A viewed from the little toe side. FIG. 13D is a front view of FIG. 13A. The shoe 10 is a so-called beach sandal, and the shoe 10 includes a sole 100, a big toe strap 33, and an ankle strap 34. In addition, FIG. 13A shows a shoe 10 for the left foot of the user, and the shoe 10 for the right foot is symmetrical with the shoe 10 for the left foot, so the detailed description of the shoe 10 for the right foot is omitted.

The sole 100 is made of rubber material or EVA urethane material, etc., and has a two-layer structure of a first layer 101 and a second layer 102. The first layer 101 includes: a missing portion 101a where the user's heel is missing, a toe portion 101b that carries the user's toe, and a missing portion 101c where the user's middle toe, ring toe, little toe and the vicinity of their roots are missing.

As shown in FIG. 13B , the second layer 102 is a shape that imitates the outer periphery of the foot without forming the missing portion 101a and the missing portion 101c in the first layer 101. The sole 100 is formed by bonding the lower surface of the first layer 101 and the upper surface of the second layer 102, and forming a height difference between the upper surface of the first layer 101 and the upper surface of the second layer 102 at the missing portion 101a and the missing portion 101c. The second layer 102 is made of a material that is more flexible than the first layer 101. The sole 100 is formed by stacking the first layer 101 on the second layer 102 and fixing them by bonding or the like to form an integrated whole.

As shown in FIG. 13C and FIG. 13D , the big toe strap 33 is formed of a belt-shaped member and is mounted in an arched manner at a location where the user's big toe is positioned in the toe portion 101b of the first layer 101. The ankle strap 34 is formed of a belt-shaped member, and both ends are mounted on both ends of the heel side of the toe portion 101b of the first layer 101. Thus, the ankle strap 34 is mounted on the sole 100 in an arched manner.

The user can wear the shoe 10 by inserting the instep into the ankle strap 34 and the big toe into the big toe strap 33. At this time, the ankle strap 34 is arranged around the ankle. When the user wears the shoe 10, the heel of the user's sole faces the upper surface of the second layer 102 separated by the height difference caused by the missing portion 101a. Furthermore, the middle toe, ring toe, little toe and their root parts of the user's foot and the part of the transverse head of the adductor hallucis muscle located near the heel relative to the root part are separated only by the height difference caused by the missing portion 101c and face the upper surface of the second layer 102.

The shoe 10 of the ninth embodiment thus constructed can obtain the same effect as the shoe 1 of the first embodiment. Furthermore, by having the missing portion 101a, the user is in a posture of walking on tiptoe, and by walking in the shoe 10, the muscles of the calf and the back of the thigh to the buttocks can be naturally exercised. Moreover, since the second layer 102 is made of a highly soft material, when the sole of the foot contacts the second layer 102, the second layer 102 will be elastically deformed to a large extent. As a result, since the balance of the user becomes unstable, in order to maintain a stable state, the body weight will be concentrated on the inner side of the sole of the user. Furthermore, since at least the second layer 102 is interposed between the ground and the sole, it is possible to prevent the sole from getting dirty or directly stepping on protrusions when using the shoe 10.

In addition, according to the shoe 10 shown in FIG. 13A , although the middle toe, ring toe, little toe and their root portions of the user's foot are opposite to the upper surface of the second layer 102 in the missing portion 101c, the index toe and its root portion may also be included there.

[Tenth embodiment]

FIG. 14A is a top view showing the appearance of a shoe 11 of the tenth embodiment of the present invention. FIG. 14B is a top view showing the back side of FIG. 14A. FIG. 14C is a side view of FIG. 14A viewed from the little toe side. FIG. 14D is a front view of FIG. 14A. The shoe 11 is a so-called beach sandal and includes a sole 110 and a foot strap 30. In addition, FIG. 14A shows a shoe 11 for the left foot of the user, and the shoe 11 for the right foot is symmetrical with the shoe 11 for the left foot, so the detailed description of the shoe 11 for the right foot is omitted. Furthermore, by attaching the same symbols to the components that are the same as those shown in FIG. 1 and FIG. 2 or components with the same functions, the detailed description is omitted.

The sole 110 is made of rubber material or EVA urethane material, and is a flat plate-shaped member that imitates the outer periphery of the foot. The bottom surface has a first recessed portion 110a at the side opposite to the user's heel. Furthermore, the bottom surface has a second recessed portion 110b at the side opposite to the area opposite to the user's big toe, middle toe, and their roots.

The foot strap 30 is fixed to the sole 110 at the same position as the shoe 1 of the first embodiment shown in FIG1 . The first recessed portion 110a and the second recessed portion 110b of the sole 110 are formed by cutting a single plate-shaped member. The end of the front strap portion 31 is fixed to the area where the second recessed portion 110b is formed.

As shown in Figures 14B to 14D, the wall surface of the second recessed portion 110b extends from the end of the toe side of the sole 110 to the long side direction of the sole 110, passes through a portion approximately close to the little toe relative to the front strap portion 31, bends at a right angle from the acupuncture point called "Yongquan" on the sole, and reaches the inner side of the sole 110 to extend into an L shape. The outer periphery of the first recessed portion 110a and the second recessed portion 110b is open.

When the user wears the shoe 11, the user's heel is opposite to the first recessed portion 110a through the bottom of the first recessed portion 110a. Furthermore, the user's big toe, index toe and their root parts and the part of the transverse head of the adductor hallucis muscle located near the heel relative to the root part are opposite to the second recessed portion 110b through the bottom of the second recessed portion 110b. The bottom of the second recessed portion 110b is flexible because it is thin-walled.

When the user walks in the shoe 11 thus constructed, the bottom surface of the inner half of the toe side of the sole, that is, the bottom surface of the second recessed portion 110b, is separated from the ground. Here, since the bottom of the second recessed portion 110b is thin-walled, it is more flexible than other parts. Therefore, when walking, the user's big toe, middle toe and their roots are easy to tilt inward. In this way, the center of gravity of the user's legs can be corrected inward, and if the user has O-shaped legs, the distance between the user's knees can be reduced. Furthermore, by having the first recessed portion 110a, the user walks on the toes, and by walking in the shoe 11, the calf and the muscles from the back of the thigh to the buttocks can be naturally exercised.

[Eleventh embodiment]

FIG. 15A is a top view showing the appearance of a shoe 12 of the eleventh embodiment of the present invention. FIG. 15B is a top view showing the back side of FIG. 15A. FIG. 15C is a side view of FIG. 15A viewed from the little toe side. The shoe 12 is a so-called beach sandal and includes a sole 120 and a foot strap 30. In addition, FIG. 15A shows a shoe 12 for the left foot of the user, and the shoe 12 for the right foot is symmetrical with the shoe 12 for the left foot, so the detailed description of the shoe 12 for the right foot is omitted. Furthermore, the same symbols are attached to the same components as those shown in FIG. 1 and FIG. 2 or components with the same functions, and the detailed description is omitted.

The sole 120 is made of rubber material or EVA urethane material, etc., and has a two-layer structure of a first layer 121 and a second layer 122. As shown in FIG. 15B and FIG. 15C, the first layer 121 includes a heel portion 121a for carrying the heel of the user and a toe portion 121b for carrying the toe of the user. The first layer 121 further has a concave portion 121c on the bottom surface at the little toe side relative to the front strap portion 31. The wall surface of the recessed portion 121c extends in a gentle arc from the end of the toe side of the first layer 121 toward the long side direction of the first layer 121, through a portion approximately close to the little toe relative to the front lace portion 31, through a portion approximately close to the toe relative to the terminal end of the outer lateral lace portion 32b, and reaches the outer side portion of the first layer 121. The outer periphery of the recessed portion 121c is open.

The second layer 122 is a flat plate-shaped member that imitates the outer periphery of the foot. The sole 120 is formed by stacking the first layer 121 on the second layer 122 and fixing them by bonding or the like. Thus, the lower part of the recessed portion 121c is covered by the upper surface of the second layer 122. In other words, the sole 120 forms a gap between the first layer 121 and the second layer 122 by having the recessed portion 121c in the first layer 121.

The foot strap 30 is fixed to the sole 120 at the same position as the shoe 1 of the first embodiment shown in FIG. 1 .

When the user wears the shoe 12, the recessed portion 121c is opposite to the user's middle toe, ring toe, little toe and their root parts; the part of the lateral head of the adductor hallucis muscle located near the heel relative to the root part; and the part of the lateral side of the arch of the foot in the flexor digiti minimi brevis muscle. In other words, when the sole is divided into the toe side and the heel side near the arch and the toe side is further divided into the medial side (big toe side) and the lateral side (little toe side), the recessed portion 121c is roughly opposite to the lateral half of the toe side.

Therefore, when the user walks in the shoe 12, the bottom surface of the outer half of the toe side of the sole, that is, the bottom surface of the recessed portion 121c, is separated from the upper surface of the second layer 122. Therefore, the upper part of the recessed portion 121c of the first layer 121 becomes thin and moves up and down, and the walking becomes unstable. In order to maintain walking balance, the user will concentrate the body weight on the inner side of the user's sole. Furthermore, when the user is standing or walking, he or she will be aware of not letting the bottom surface of the recessed portion 121c touch the upper surface of the second layer 122. In this way, the center of gravity of the user's legs can be corrected inward, and if the user has O-shaped legs, the distance between the user's knees can be reduced.

According to the eleventh embodiment thus constructed, the same effect as the first embodiment can be expected, and the sole of the foot can be prevented from getting dirty or stepping directly on a protrusion when using the shoe 12. In addition, although the sole 120 of the shoe 12 is a two-layer structure, it can also be a three-layer structure, and a recessed portion 121c can be provided on the outer side of the sole 120 by forming a missing portion in the middle layer. Alternatively, a notch can be formed by cutting a thick single-piece plate in the central portion in the thickness direction, thereby providing a recessed portion 121c on the outer side of the sole 120.

[Twelfth embodiment]

FIG. 16A is a top view showing the appearance of a shoe 13 of the twelfth embodiment of the present invention. FIG. 16B is a top view showing the back of FIG. 16A. FIG. 16C is a side view of FIG. 16A viewed from the little toe side. FIG. 16D is a front view of FIG. 16A. The shoe 13 is a so-called beach sandal and includes a sole 130 and a foot strap 30. In addition, FIG. 16A shows a shoe 13 for the left foot of the user, and the shoe 13 for the right foot is symmetrical with the shoe 13 for the left foot, so the detailed description of the shoe 13 for the right foot is omitted. Furthermore, the same symbols are attached to the same components as those shown in FIG. 1 and FIG. 2, and the detailed description is omitted.

The shoe 13 is different from the shoe 1 of the first embodiment in that the sole 20 of the first embodiment is the sole 130.

The sole 130 is made of rubber material or EVA urethane material, etc., and has a two-layer structure of a first layer 131 and a second layer 132. The first layer 51 is composed of a first block 131a to which the terminal end of the inner lateral strap portion 32a and the outer lateral strap portion 32b of the clip 30 are fixed, and a second block 131b to which the front strap portion 31 of the clip 30 is fixed. The heel side of the first block 131a is missing, and it is difficult to carry the user's heel. The outer side part of the second block 131b is missing, and it is configured to be able to carry the user's big toe, middle toe and their root parts on the one hand, but cannot carry the user's middle toe, ring toe, little toe and their root parts.

The second layer 132 is shaped like the periphery of the foot. The sole 130 is formed by bonding the lower surface of the first layer 131 to the upper surface of the second layer 132. The first block 131a is fixed to the heel side of the second layer 132, and the second block 131b is fixed to the toe side of the second layer 132.

The sole 130 is formed by fixing the first layer 131 on the second layer 132. In the sole 130, an L-shaped recessed portion 133a is formed between the first block 131a and the second block 131b, and a recessed portion 133b is formed on the heel side of the second block 131b.

The shoe 13 is completed by installing the same foot strap 30 as the shoe 1 of the first embodiment on the sole 130.

When the user wears the shoe 13, the heel of the user's sole faces the recessed portion 133a. Specifically, the middle toe, the ring toe, the little toe and their root portions; the portion of the lateral head of the adductor hallucis muscle located near the heel relative to the root portion; the lateral portion of the arch of the foot in the flexor digiti minimi brevis muscle; and a portion of the arch of the foot face the recessed portion 133b. These portions face the upper surface of the second layer 132 separated by the height difference between the upper surface of the first layer 131 and the upper surface of the second layer 132 formed by the recessed portions 133a and 133b.

The shoe 13 of the twelfth embodiment thus constructed can obtain the same effect as the shoe 1 of the first embodiment. Furthermore, by having the recessed portion 133a, the user is in a posture of walking on tiptoe. Thus, by walking in the shoe 13, the muscles of the calf and from the back of the thigh to the buttocks can be naturally exercised. Moreover, since the second layer 132 is made of a highly flexible material, when the sole of the foot contacts the second layer 132, the second layer 132 will be elastically deformed to a large extent. Thus, since the balance of the user becomes unstable, in order to maintain a stable state, the body weight will be concentrated on the inner side of the sole of the user. Furthermore, since at least the second layer 132 is interposed between the ground and the sole, it can prevent the sole from getting dirty or directly stepping on a protrusion when using the shoe 13.

[Thirteenth embodiment]

FIG. 17A is a top view showing the appearance of a shoe 14 of the thirteenth embodiment of the present invention. FIG. 17B is a top view showing the back side of FIG. 17A. FIG. 17C is a side view of FIG. 17A viewed from the little toe side. FIG. 17D is a front view of FIG. 17A. The shoe 14 is a so-called beach sandal and includes a sole 140 and a foot strap 30. In addition, FIG. 17A shows a shoe 14 for the left foot of the user, and the shoe 14 for the right foot is symmetrical with the shoe 14 for the left foot, so the detailed description of the shoe 14 for the right foot is omitted. Furthermore, the same symbols are attached to the same components as those shown in FIG. 1 and FIG. 2, and the detailed description is omitted.

The shoe 14 is different from the shoe 1 of the first embodiment in that the sole 20 of the first embodiment is the sole 140.

The sole 140 is made of a rubber material or an EVA urethane material, etc., and has a two-layer structure of a first layer 141 and a second layer 142. The first layer 141 has a missing portion 141a where the user's heel is missing, a toe portion 141b where the user's toes are carried, and a missing portion 141c where the user's middle toe, ring toe, little toe and the vicinity of their roots are missing.

The missing portion 141c is formed by cutting along the long side direction of the first layer 141 from the end of the toe side of the first layer 141, through a portion approximately close to the little toe relative to the front lace portion 31, through a portion approximately close to the toe relative to the end of the outer lateral lace portion 32b, to the outer side portion of the sole 140, in a gentle arc shape.

The second layer 142 does not have the missing portion 141a and the missing portion 141c of the first layer 141, and is formed in the shape of the outer periphery of the foot. The sole 140 is formed by bonding the lower surface of the first layer 141 and the upper surface of the second layer 142. As shown in FIG. 17C and FIG. 17D, a height difference formed by the upper surface of the first layer 141 and the upper surface of the second layer 142 is formed at the position of the missing portion 141a and the missing portion 141c. The second layer 142 is made of a material with higher flexibility than the first layer 141. The bottom surface of the second layer 142 is formed with an inclined surface 142a on the toe side, and an inclined surface 142b on the heel side. The inclined surface 142a is inclined upward toward the toe side in a manner that the wall thickness of the second layer 142 gradually becomes thinner, and the inclined surface 142b is inclined upward toward the heel side in a manner that the wall thickness of the second layer 142 gradually becomes thinner.

The shoe 14 is completed by installing the same clip 30 as the shoe 1 of the first embodiment on the sole 140.

When the user wears the shoe 14, the heel of the user's sole faces the missing portion 141a. Specifically, the middle toe, the ring toe, the little toe and their root portions, the portion of the lateral head of the adductor hallucis muscle located near the heel relative to the root portion, and the lateral portion of the arch of the foot in the flexor digitorum brevis muscle face the missing portion 141c. These portions face the upper surface of the second layer 142 due to the height difference between the upper surface of the first layer 141 and the upper surface of the second layer 142 formed by the missing portion 141a and the missing portion 141c.

The shoe 14 of the thirteenth embodiment thus constructed can obtain the same effect as the shoe 1 of the first embodiment. Furthermore, by having the missing portion 141a, the user is in a posture of walking on tiptoe, and by walking in the shoe 14, the muscles of the calf and the back of the thigh to the buttocks can be naturally exercised. Furthermore, since the second layer 142 is made of a highly flexible material, when the sole of the foot contacts the second layer 142 through the missing portion 141a and the missing portion 141c, the second layer 142 will be elastically deformed to a large extent. As a result, since the balance of the user becomes unstable, in order to maintain a stable state, the body weight will be concentrated on the inner side of the sole of the user. Furthermore, since at least the second layer 142 is interposed between the ground and the sole, it is possible to prevent the sole from getting dirty or directly stepping on a protrusion when using the shoe 14. Furthermore, since the bottom surface of the second layer 142 is formed with an inclined surface 142a and an inclined surface 142b, the user can smoothly move his body weight when walking. This can provide a shoe that is easy to walk in.

[Fourteenth embodiment]

FIG. 18A is a top view showing the appearance of a shoe 15 of the fourteenth embodiment of the present invention. FIG. 18B is a top view showing the back side of FIG. 18A. FIG. 18C is a side view of FIG. 18A viewed from the little toe side. The shoe 15 is a so-called beach sandal and includes a sole 150 and a foot strap 30. In addition, FIG. 18A shows a shoe 15 for the left foot of the user, and the shoe 15 for the right foot is symmetrical with the shoe 15 for the left foot, so the detailed description of the shoe 15 for the right foot is omitted. Furthermore, the same symbols are attached to the same components as those shown in FIG. 1 and FIG. 2, and the detailed description is omitted.

The shoe 15 is different from the shoe 1 of the first embodiment in that the sole 20 of the first embodiment is the sole 150.

The sole 150 is made of a rubber material or an EVA urethane material, and is a plate-shaped member that follows the shape of a foot. The sole 150 has a missing portion 150a where the user's heel is missing.

The shoe 15 of the fourteenth embodiment thus constructed has a missing portion 150a, so that the user can walk on tiptoe. By walking in the shoe 15, the user can naturally exercise the muscles of the calf and the back of the thigh to the buttocks.

[Fifteenth embodiment]

FIG. 19A is a top view showing the appearance of a shoe 16 of the fifteenth embodiment of the present invention. FIG. 19B is a top view showing the back of FIG. 19A. FIG. 19C is a side view of FIG. 19A viewed from the little toe side. FIG. 19D is a front view of FIG. 19A. The shoe 16 is a so-called beach sandal and includes a sole 160 and a foot strap 30. In addition, FIG. 19A shows a shoe 16 for the left foot of the user, and the shoe 16 for the right foot is symmetrical with the shoe 16 for the left foot, so the detailed description of the shoe 16 for the right foot is omitted. Furthermore, the same symbols are attached to the same components as those shown in FIG. 1 and FIG. 2, and the detailed description is omitted.

The shoe 16 is different from the shoe 1 of the first embodiment in that the sole 20 of the first embodiment is the sole 160.

The sole 160 is made of a rubber material or an EVA urethane material, etc., and is a two-layer structure of a first layer 161 and a second layer 162. The first layer 161 has a missing portion 161a where the user's heel is missing. The second layer 162 does not form the missing portion 161a in the first layer 161, and is shaped like the outer periphery of the foot. The second layer 162 has the same hardness as the first layer 161.

A slope 161b is formed on the bottom surface of the edge on the toe side of the first layer 161. A slope 162a is formed on the bottom surface of the edge on the toe side of the second layer 162. The slope 161b and the slope 162a are inclined upward toward the toe side. Therefore, the plate thickness of the toe portion of the first layer 161 and the second layer 162 gradually becomes thinner.

The sole 160 is formed by bonding the lower surface of the first layer 161 and the upper surface of the second layer 162, and a concave portion (height difference) formed by the upper surface of the first layer 161 and the upper surface of the second layer 162 is formed at the position of the missing portion 161a. Furthermore, by overlapping the inclined surface 161b of the first layer 161 and the inclined surface 162a of the second layer 162, an inclined surface inclined upward toward the toe side is formed on the back side of the toe side of the sole 160.

The shoe 16 is completed by installing the same clip 30 as the shoe 1 of the first embodiment on the sole 160.

When the user wears the shoe 16, the heel portion of the user's sole faces the upper surface of the second layer 162 at a height difference caused by the missing portion 161a.

The shoe 16 of the fifteenth embodiment thus constructed has an inclined surface formed on the back side of the toe portion, so that the bottom surface of the toe portion contacts the ground through the inclined surface when walking, and the center of gravity moves smoothly when walking, making it easier for the user to walk. Furthermore, since at least the second layer 162 is interposed between the ground and the sole, it can prevent the sole from getting dirty or directly stepping on a protrusion when using the shoe 16.

Although the embodiments of the present invention are described above, the embodiments of the present invention are not limited to the above embodiments. For example, although the above embodiments are described using beach sandals as an example, they can also be applied to straw sandals. Furthermore, although the sole is made of rubber material or EVA urethane material, the material of the sole is not limited thereto. For example, it can also be made of wood.

11: Shoes

30: Ankle straps

31: Anterior ligament

32: Horizontal straps

32a: Inner transverse ligament

32b: Outer transverse ligament

110:Sole

110a: first recessed portion

110b: Second recessed portion

Claims (1)

A shoe having a sole in the shape of a foot for a riding foot, characterized in that: the sole has a first concave portion and a second concave portion on the bottom surface, the first concave portion is opposite to the heel of the user through the bottom of the first concave portion, the second concave portion is opposite to the big toe, the index toe and the root part of the user's foot through the bottom of the second concave portion, the bottom of the first concave portion and the second concave portion are flexible, wherein the wall surface of the second concave portion, from the end of the toe side of the sole toward the length direction of the sole, passes through the part close to the little toe relative to the index toe, and bends from the vicinity of the Yongquan point of the sole to the big toe side to reach the inner side of the sole.

Images