JP2022119600A - footwear - Google Patents

Abstract

To provide footwear which prevents a wearer from getting tired even when walking long, secures stability and mobility during walking, and makes it easy to obtain an exercise effect.SOLUTION: A sole body 3 includes: a calcaneus front supporting projection 90 which protrudes to a surface of the sole body 3 for the purpose of maintaining an inner vertical arch, an outer vertical arch and a lateral arch of a foot, and stabilizes a calcaneus bone by supporting the calcaneus nodule of a foot; a front side thenar support part 100 which protrudes to the surface of the sole body 3, and supports the ball of the foot and the little ball; a front part 110 which is thinly formed in front of the front side thenar support part 100; and a reverse side thenar support part which protrudes to a rear side of the sole body 3, supports the ball of the foot and the little ball of the foot, and forms a space 111 between the front part 110 and a grounding face 112 of the sole body 3.SELECTED DRAWING: Figure 3

Description

The present invention relates to footwear such as sandals.

2. Description of the Related Art Conventionally, footwear such as sandals and slippers having a sole body on which a foot is placed and a string or belt provided to prevent the sole body from separating from the foot is known (see, for example, Patent Document 1).
Since this type of footwear does not cover the toes, heels, etc., it has an open structure that makes it easy to wear, and is often used as both indoor shoes and underwear.

Japanese Patent Application No. 2017-218769

A conventional sole body is made of rubber, resin, leather, or the like, and has a flat shape. Therefore, there is a problem that the arch of the sole cannot be maintained in a natural shape to support the foot in a well-balanced manner, and walking for a long time tends to cause fatigue.
SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide footwear that reduces fatigue even when walking for a long period of time, ensures stability and mobility during walking, and facilitates exercise effects.

The footwear of the present invention comprises a sole body on which the foot is placed, and a string or belt provided to prevent the sole body from separating from the foot. and a calcaneus front support protrusion that protrudes from the surface of the sole body and supports the calcaneus tubercle of the foot to stabilize the calcaneus, in order to maintain the lateral arch; a surface side ball supporting portion for supporting the ball of the foot and the ball of the foot; a front portion formed thin in front of the surface side ball supporting portion; a backside ball-of-the-toe support part that supports the ball of the toe and the ball of the little toe and forms a gap between the front part and the contact surface of the sole body.

According to the present invention, the front calcaneal support projection protrudes from both the front surface and the back surface of the sole body while maintaining the medial longitudinal arch, the lateral longitudinal arch, and the lateral arch of the foot. And the back side ball support part supports the ball of the foot and the ball of the foot, so that the foot arch is maintained in front of the first to fifth proximal phalanx of the foot. The finger restraint is released. In addition, since the back side toe ball support part protrudes from the back side of the sole body, supports the ball of the big toe and the ball of the little toe, and forms a gap between the front part and the contact surface of the sole body, During walking, the toes become more free, and walking motions in which the toes grip the ground become possible.
Therefore, while maintaining the arch of the sole to ensure the stability of the body, it is possible to facilitate the motion of grasping the ground with the toes, thereby further enhancing the exercise effect. Also, even if you walk for a long time, you will not get tired easily.

According to the present invention, while maintaining the shape of the arch of the sole to ensure the stability and mobility of the body, it is possible to facilitate the movement of grasping the ground with the toes and enhance the exercise effect, Even if you walk for a long time, you will not get tired easily.

It is a top view showing footwear concerning an embodiment of the present invention. It is a bottom view of the same. 3 is a cross-sectional view taken along line III-III of FIG. 2; FIG. 2. (A) is a sectional view taken along line AA in FIG. 2, (B) is a sectional view taken along line BB in FIG. 2, and (C) is a sectional view taken along line CC in FIG. FIG. 4 is an explanatory diagram of the arch of the sole; It is a vertical cross-sectional view showing the relationship between the sandal and the foot.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a plan view showing a sandal with a thong (footwear) 1 according to this embodiment.
The sandal 1 has a sole body 3 on which the foot is placed, a string 5 provided to prevent the sole body 3 from coming off the foot, and a thong 7. - 特許庁
The sole body 3 and the string 5 are integrally formed and made of resin having a predetermined hardness, and the sole body 3 and the string 5 are integrally connected by a thong 7. - 特許庁Although not shown in the drawings, the present invention can also be applied to footwear such as so-called slip-on sandals and slippers, which are composed of a sole body and a band without a thong 7 attached.

FIG. 2 is a bottom view showing the sole body 3 on which the skeleton of the foot is superimposed. Note that this drawing is a view from below and some of the bones are hidden due to the overlapping bones. The top plan view of the foot is different from the bottom view of FIG. 2 in how the bones overlap.

As shown in FIG. 2, the skeletal structure 10 of the foot includes a calcaneus 12, a talus 14, a scaphoid 16, a cuboid 18, first to third cuneiform bones 20, 22, 24, and first to fifth metatarsus. Bones 26, 28, 30, 32, 34, 1st to 5th proximal phalanx 36, 38, 40, 42, 44, 2nd to 5th middle phalanx 46, 48, 50, 52, 1st to 5th Consists of distal phalanges 54,56,58,60,62. The front ends of the first to fifth metatarsal bones 26, 28, 30, 32, and 34 are divided into first to fifth metatarsal head parts 26A (also referred to as ball of the foot 26A), 28A, 30A, 32A, and 34A ( It is also called the ball of the toe 34A.). The stepped portion located at the front of the calcaneus 12 is the front of the calcaneus (also referred to as the calcaneus tubercle) 12A. In FIG. 2, only the scaphoid bone 16 is shown with a dashed line, which is hidden due to overlapping of the bones.

In this configuration, as shown in FIGS. 1 and 2 , a cuboid bone support projection 80 and a calcaneus front support projection 90 are formed on the surface (upper surface) 3A of the sole body 3 . The cuboid bone support protrusion 80 and the calcaneus front support protrusion 90 constitute the protrusion 2 .
The cuboid bone support protrusion 80 is provided at a portion corresponding to the cuboid bone 18, and the calcaneus front support protrusion 90 is provided at a portion corresponding to the calcaneus tubercle 12A. The cuboid bone support projection 80 and the calcaneus front support projection 90 are formed solid.

The front calcaneus support projection 90 is provided on the cuboid bone support projection 80, and the surface of the front calcaneus support projection 90 overlaps the surface of the cuboid bone support projection 80 to form one projection. forming part 2. The cuboid bone support projection 80 and the front calcaneus support projection 90 may be integrated with each other or may be separate bodies. In FIG. 2 , the front calcaneus support projection 90 is schematically illustrated together with contour lines indicating the height of the front calcaneus support projection 90 .

The surface 3A of the sole body 3 further has a surface side that supports the first metatarsal head (ball of the big toe) 26A and the heads of the second to fifth metatarsals (ball of the lesser toe) 28A to 34A. A ball-of-the-toe support portion (hereinafter referred to as a surface-side protruding portion) 100 is formed. As shown in FIG. 3, the surface-side projecting portion 100 protrudes upward from the surface 3A of the sole body 3. As shown in FIG. The front edge of the surface-side projecting portion 100 extends along a line connecting the first proximal phalanx 36 to the fifth proximal phalanx 44 in bottom view.
A front portion 110 is formed in front of the surface-side projecting portion 100 , and the thickness of the front portion 110 is formed to be the thinnest among the thicknesses of the sole body 3 .

The back surface (lower surface) 3B of the sole body 3 supports the first metatarsal head (ball of the big toe) 26A and the heads of the second to fifth metatarsals (ball of the lesser toe) 28A to 34A. A rear side ball support portion (hereinafter referred to as a rear side protruding portion) 200 is formed. As shown in FIG. 3 , the back-side projecting portion 200 bulges downward from the back surface 3B of the sole body 3 to form a gap 111 between the front portion 110 of the sole body 3 and the ground contact surface 112 of the sole body 3. is doing. A front edge portion of the back-surface-side projecting portion 200 extends along a line connecting the first proximal phalanx 36 to the fifth proximal phalanx 44 in a bottom view.
A front portion 110 is positioned in front of the back side projecting portion 200 , and the thickness of the front portion 110 is formed to be the thinnest among the thicknesses of the sole body 3 .

In the present embodiment, as shown in FIG. 3 , the outer shape X1 of the front side protrusion 100 is formed larger than the outer shape X2 of the back side protrusion 200 in the longitudinal direction of the sole body 3 . In this embodiment, the front-side protrusions 100 are formed to protrude from the back-side protrusions 200 by 2 to 5 mm in the length direction of the sole body 3, and the outer shape X1 is 4 to 10 mm longer than the outer shape X2. formed large. In the width direction of the sole body 3, as shown in FIG. The outer shape X4 of 200 is formed so as to be slightly smaller than the outer shape X3 of the surface-side protrusion 100 .

The projection height of the front-side protrusion 100 from the front surface 3A and the projection height of the rear-side protrusion 200 from the rear surface 3B are substantially equal, and both the front-side protrusion 100 and the rear-side protrusion 200 are flat protrusions. part shape. As shown in FIG. 2, the surface-side protruding portion 100 supports the ball of the foot 103 that supports the ball of the foot 26A, the heads of the second to fourth metatarsals 28A to 32A, and the ball of the toe 34A. A V-shaped recess 105 is formed between the ball of the foot 103 and the ball of the foot 104 . A concave portion 106 is formed in the rear edge portion of the surface-side projecting portion 100 . The outer peripheral portion 102 of the surface-side projecting portion 100 is slanted so that the thickness gradually decreases toward the outer side of the surface-side projecting portion 100 . The back-side protruding portion 200 has a shape substantially similar to that of the front-side protruding portion 100 and is formed to be small.

FIG. 4B is a cross-sectional view taken along the line BB in FIG. A cuboid bone support projection 80 and a calcaneus front support projection 90 are formed on the surface 3A of the sole body 3 .
FIG. 4C is a cross-sectional view taken along line CC of FIG. A concave portion 129 in which the calcaneus 12 is accommodated is formed on the surface 3A of the sole body 3 .

FIG. 5 shows the arch of the sole of the foot.
Arches (schematically indicated by dashed lines) 119 are formed on the soles of human feet in a natural state during walking or running.
The arch 119 includes a medial longitudinal arch 121 and a lateral longitudinal arch 122 formed in the longitudinal direction of the foot, and a transverse arch 120 formed in the lateral direction of the foot. The transverse arch 120 is formed across the first through fifth metatarsal bones 26 through 34, as shown in FIG. In addition, the medial longitudinal arch 121 is formed across the calcaneus 12, the talus 14, the navicular bone 16, the three cuneiform bones 20-24, and the first to third metatarsal bones 26-30. The lateral longitudinal arch 122 is formed straddling between the calcaneus 12, the cuboid bone 18, and the fourth and fifth metatarsal bones 32,34.

FIG. 6 is a diagram showing the principle that the user's weight F acts on the calcaneus 12 from the tibia 68 via the talus 14 when the sandal 1 is worn.
The calcaneus 12 becomes a pivot for supporting the weight F of the user. In the calcaneus 12, the front upper end 12B of the calcaneus becomes the force point P1, and the lower end of the calcaneus (rear calcaneus) 12C becomes the fulcrum P2.
In this configuration, the calcaneus front support protrusion 90 supports the calcaneus tubercle 12A substantially directly below the force point P1, thereby stabilizing the calcaneus 12. As shown in FIG. In addition, since the calcaneus tubercle 12A is at a distance from the lower end of the calcaneus 12C, which serves as the fulcrum P2, by providing the calcaneus front support projection 90 at a portion corresponding to the calcaneus tubercle 12A, the heel can be efficiently moved with a small force. Bone 12 can be supported.

The weight F of the user also acts on the cuboid bone 18 via the heel bone 12 . As for the cuboid bone 18, since the first to fifth metatarsal heads 26A to 34A serve as the fulcrum P3, the cuboid bone 18 is acted upon by a moment centering on the fulcrum P3.
In this configuration, the cuboid bone supporting convex portion 80 supports the cuboid bone 18 substantially directly below the force point P1, thereby stabilizing the cuboid bone 18 .
In addition, since the cuboid bone 18 is distant from the first to fifth metatarsal heads 26A to 34A that serve as the fulcrum P3, providing the cuboid bone support protrusion 80 at a portion corresponding to the cuboid bone 18 reduces the force required to support the cuboid bone. The cubic bone 18 can be efficiently supported by stroking.

It is difficult to stabilize the calcaneus 12 only by supporting the cuboid 18, and the joint between the cuboid 18 and the calcaneus 12 (calcaneocuboid joint) may be distorted.
Since the calcaneus 12 constitutes both the medial longitudinal arch 121 and the lateral longitudinal arch 122 at the same time, if the calcaneus 12 is not stabilized, the longitudinal arch cannot be maintained in a normal position. In particular, as shown in FIG. 6, the calcaneal tubercle 12A in the front part of the calcaneus 12 is arranged so that the long plantar ligament 64 connecting the middle part of the calcaneus 12 and the second to fifth metatarsals 28 to 34 overlaps. positioned. The long plantar ligament 64 also serves to maintain the longitudinal arch.

In this configuration, since the front calcaneus support projection 90 supports the calcaneus tuberosity 12A via the long plantar ligament 64, the calcaneus 12 is stabilized, the distortion of the calcaneocuboid joint can be reduced, and the longitudinal arch can be reduced. can be placed in the correct position. This allows the longitudinal arches to function more effectively as springs. Especially at night, the function of the long plantar ligament 64 to maintain the longitudinal arch is lower than during the daytime, so it is effective to support the long plantar ligament 64 . The calcaneus front support protrusion 90 includes a portion 4 corresponding to the calcaneus tubercle 12A at the position where the long plantar ligament 64 overlaps.

The anterior calcaneus support protrusion 90 not only supports the long plantar ligament 64 to promote passive stabilization of the arch of the foot, but also the long fibula, which is important for active stabilization of the lateral longitudinal arch via the long plantar ligament 64. It supports the stop tendon 66 of the muscle. Here, passive stabilization is provided by ligaments and active stabilization by muscles (tendons). The stop tendon 66 of the peroneus longus muscle, after wrapping around the cuboid bone 18, crosses the sole from the lateral edge of the foot to the bottom of the first cuneiform bone 20 and the first metatarsal bone 26, as shown in FIG. to stop. Furthermore, a part of the calcaneus front support projection 90 is positioned below the cuboid bone 18 and supports the navicular bone 16 via the cuboid bone 18 . This indirectly supports the stop tendon 67 of the tibialis posterior muscle, which is the primary active stabilizing structure of the medial longitudinal arch.
The stop tendon 67 of the tibialis posterior muscle provides fascia to the first through third cuneiform bones 20-24, second through third metatarsal bones 28, 30 and navicular bone 16. The peroneus longus, tibialis posterior, and oblique runs of these two muscles hold the longitudinal arch in addition to the transverse arch.

In addition, since the calcaneus 12 constitutes a joint, it is necessary to allow movement because only a fixed support hinders the movement function.
Since the sole body 3 is configured so that the surface is inclined downward in the radial direction around the cuboid bone support projection 80 to relieve stress, the movement of the joint formed by the calcaneus 12 is allowed. The calcaneus front support protrusion 90 is sunk at the portion where the thickness is maximum due to the weight of the user, and supports the calcaneus tubercle 12A. As the calcaneus front support projection 90 sinks, the sole body 3 tilts downward in the radial directions in the front, rear, left, and right directions around the cuboid bone support projection 80 to support the foot with the cuboid bone 18 as a fulcrum. , allowing the foot to move around the cubic bone support projection 80.

In this configuration, the front calcaneal support protrusion 90 abuts on the calcaneal tuberosity (anterior calcaneus of the foot) 12A to maintain the medial longitudinal arch 121, the lateral longitudinal arch 122 and the lateral arch 120 of the foot.
The calcaneus front support projection 90 can stably support the calcaneus 12, and the lateral arch 120, the medial longitudinal arch 121, and the lateral longitudinal arch 122 of the sole are maintained in a natural shape, thereby improving the stability of the foot. Stability and mobility can be improved. Then, while the front calcaneus support protrusion 90 maintains the medial longitudinal arch 121, the lateral longitudinal arch 122, and the lateral arch 120, the surface-side protrusion 100 and the back-side protrusion 200 are connected to each other to form the first foot of the foot. It supports the metatarsal head (ball of the big toe) 26A and the second to fifth metatarsal heads (ball of the lesser toe) 28A-34A.

The sandals 1 having this configuration can train the toes just by wearing them and walking. In particular, in this configuration, since the sandal 1 also includes the cuboid bone support protrusion 80, the skeletal balance of the foot is adjusted, and stability and mobility are further improved.

In this configuration, as shown in FIG. 6, the back-side protrusion 200 contacts the floor or the ground surface 112, and the surface portion 100A of the front-side protrusion 100 causes the ball of the big toe 26A and the ball of the little toe 34A. The first to fifth metatarsal heads 26A to 34A (groin sides of the toes) are held upward.
Therefore, the calcaneus front support projection 90 is in a state in which the restraint of the toes is released while maintaining the state of the arch of the foot.

In this configuration, the thickness of the front portion 110 in front of the surface-side projecting portion 100 is formed to be the thinnest among the thicknesses of the sole body 3 .
Therefore, the front portion 110 is one step lower than the surface-side protrusion 100, further increasing the flexibility of the toes in front of the first to fifth distal phalanxes 54-62 of the foot.
The action of the toes to grip the ground is that the so-called front part 110 on which the toes rest, including the proximal phalanxes 36-44, the middle phalanxes 46-52 and the distal phalanxes 54-62 in FIG. This can be easily done if the protrusion 100 on which 26A and the ball of the toe 34A ride is softer.
In this configuration, since the front portion 110 is thinner than the surface-side projecting portion 100, the toes can be easily moved.
Therefore, it is possible to easily perform a walking motion such as gripping the ground with the toes, thereby enhancing the exercise effect. In addition, the exercise effect can be enhanced while maintaining the shape of the arch of the sole to ensure the stability and mobility of the body.

In this configuration, since the back-side projecting portion 200 is formed on the back surface 3B, a gap 111 is formed between the front portion 110 and the ground surface 112, as shown in FIG. Therefore, when walking, the front portion 110 of the sole body 3 can be easily pushed toward the gap 111 from above. In addition, a V-shaped concave portion 105 is also formed in the surface-side protruding portion 100, and the portion between the ball portion 103 and the ball portion 104 of the other toe is thin, and the front portion 110 is pushed toward the gap 111 by the big toe. easy.
As described above, in the present embodiment, it becomes easier to bend the toes and apply force to the toes, so that the action of grasping the ground with the toes can be easily performed.

In addition, since the flat surface portion 100A of the surface-side projecting portion 100 contacts the bottom of the foot, the movement of the foot is less likely to be hindered than when the uneven shape contacts the bottom of the foot.
On the other hand, since it is difficult to hinder the movement of the foot, the positions of the ball of the big toe 26A and the ball of the little toe 34A may shift during walking or exercising, but the surface-side protruding portion 100 is formed wide in the front-rear direction. The surface-side protruding portion 100 can support the ball of the big toe 26A and the ball of the little toe 34A.

The sandals 1 may be indoor shoes or outdoor shoes.
It is desirable that the outer shape X2 of the back-side protruding portion 200 is relatively large and flat, and that the hardness of the resin is high.
Considering the flexibility of the toes, the surface-side protrusions 100 are formed to protrude by 2 to 3 mm in the front-rear direction of the sole body 3, and the outer shape X1 is formed to be 4 to 6 mm larger than the outer shape X2. It is desirable to form
Considering the bendability of the toes, it is desirable that the back surface side projecting portion 200 extend in a band shape in the width direction of the sole body 3 .

In general, the sandals 1 are designed so that the heel side is raised and the toe side is lowered to facilitate walking. Therefore, it is difficult for the toes to move, and the natural movement of the toes may be hindered.
On the other hand, in this configuration, since the surface-side protrusion 100 and the back-side protrusion 200 hold the ball of the big toe 26A and the ball of the little toe 34A at a high position, the foot supported by the sandal 1 approaches the horizontal position. The weight is less likely to be applied to the toe side on the front side of the fulcrum P3 (see FIG. 6), making it easier to move the toes.

As described above, the sandal 1 of this embodiment includes the sole body 3 on which the foot is placed and the string or belt 5 provided to prevent the sole body 3 from separating from the foot. In order to maintain the arch 121, the outer longitudinal arch 122 and the lateral arch 120, the front calcaneus support projection 90 abuts on the front calcaneus 12A of the foot, and the front calcaneus support projection 90 protrudes from the surface of the sole body 3 to support the ball of the foot. 26A and the ball of the foot 34A, a front portion 110 formed thin in front of the surface side protrusion 100, and a front portion 110 protruding from the back surface 3B of the sole body 3 to support the ball of the foot. 26A and the ball of the toe 34A, and a rear projection 200 forming a gap 111 between the front part 110 and the ground contact surface 112 of the sole body 3.
Therefore, while maintaining the shape of the arches 120 to 122 of the sole in a natural state to ensure the stability and mobility of the body, the toes can be easily made to grip the ground, and the toes can be trained. can be done.

In the sandal 1 of this embodiment, the outer shape of the front-side protrusion 100 is formed to be larger than the outer shape of the back-side protrusion 200 .
Therefore, the motion of gripping the ground with the toes is facilitated, and a training effect can be obtained. In addition, abrasion of the back surface side projecting portion 200 can be suppressed.

In the sandal 1 of this embodiment, the calcaneus front upper end of the calcaneus serves as a force point, and the rear calcaneus serves as a fulcrum, and a moment around the fulcrum acts. , to support the calcaneal tuberosity substantially directly below the point of force, so that the toes can be easily made to grip the ground, and a training effect can be obtained.

In the sandal 1 of this embodiment, the front edge of the surface-side projecting portion 100 extends along the line connecting the first proximal phalanx 36 to the fifth proximal phalanx 44 of the foot.
Therefore, the sole body 3 at the site corresponding to the first proximal phalanx 36 and the first distal phalanx 54 can be easily pushed downward, and the action of gripping the ground can be easily performed by the big toe, resulting in a training effect. can get.

In this embodiment, the thickness of the outer peripheral portion of the surface-side protruding portion 100 gradually decreases. Therefore, since the outer peripheral portion 102 of the surface-side projecting portion 100 can be gradually deformed according to the body weight, it is possible to reduce discomfort to the feet.

In the sandal 1 of this embodiment, the cuboid bone support projection 80 is arranged overlapping the calcaneus front support projection 90, and the cuboid bone support projection 80 corresponds to the cuboid bone 18 to the navicular bone 16 of the foot. including parts

In this configuration, since the outer shape X4 of the back-side protrusion 200 is formed slightly smaller than the outer shape X3 of the front-side protrusion 100, it is easier to bend the toes and apply force to the toes. This makes it easier to grab the ground with your toes.
The sandals 1 may be indoor shoes or outdoor shoes.
In the case of outdoor shoes, the wear of the back side projecting portion 200 becomes a problem compared to indoor shoes. In this case, it is desirable that the back surface side projecting portion 200 has a flat shape and extends in a belt shape in the width direction of the sole body 3 .

In general, sandals have a high heel side and a low toe side to facilitate walking. Therefore, it is difficult for the toes to move, and the natural movement of the toes may be hindered.
On the other hand, in this configuration, since the surface-side protrusion 100 and the back-side protrusion 200 hold the ball of the big toe 26A and the ball of the little toe 34A at a high position, the foot supported by the sandal 1 approaches the horizontal position. The weight is less likely to be applied to the toe side on the front side of the fulcrum P3 (see FIG. 6), making it easier to move the toes.

As described above, the sandal 1 of this embodiment includes the sole body 3 on which the foot is placed and the string or belt 5 provided to prevent the sole body 3 from separating from the foot. In order to maintain the arch 121, the outer longitudinal arch 122 and the lateral arch 120, the front calcaneus support projection 90 abuts on the front calcaneus 12A of the foot, and the front calcaneus support projection 90 protrudes from the surface of the sole body 3 to support the ball of the foot. 26A and the ball of the foot 34A, a front portion 110 formed thin in front of the surface side protrusion 100, and a front portion 110 protruding from the back surface 3B of the sole body 3 to support the ball of the foot. 26A and the ball of the toe 34A, and a rear projection 200 forming a gap 111 between the front part 110 and the ground contact surface 112 of the sole body 3.
Therefore, while maintaining the shape of the arches 120 to 122 of the sole in a natural state to ensure the stability and mobility of the body, the toes can be easily made to grip the ground, and the toes can be trained. can be done.

In the sandal 1 of this embodiment, the outer shape of the front-side protrusion 100 is formed to be larger than the outer shape of the back-side protrusion 200 .
Therefore, the motion of gripping the ground with the toes is facilitated, and a training effect can be obtained. In addition, abrasion of the back surface side projecting portion 200 can be suppressed.

In the sandal 1 of this embodiment, the calcaneus front upper end of the calcaneus serves as a force point, and the rear calcaneus serves as a fulcrum, and a moment around the fulcrum acts. , to support the calcaneal tuberosity substantially directly below the point of force, so that the toes can be easily made to grip the ground, and a training effect can be obtained.

In the sandal 1 of this embodiment, the front edge of the surface-side projecting portion 100 extends along the line connecting the first proximal phalanx 36 to the fifth proximal phalanx 44 of the foot.
Therefore, the sole body 3 at the site corresponding to the first proximal phalanx 36 and the first distal phalanx 54 can be easily pushed downward, and the action of gripping the ground can be easily performed by the big toe, resulting in a training effect. can get.

In this embodiment, the thickness of the outer peripheral portion of the surface-side protruding portion 100 gradually decreases. Therefore, since the outer peripheral portion 102 of the surface-side projecting portion 100 can be gradually deformed according to the body weight, it is possible to reduce discomfort to the feet.

In the sandal 1 of this embodiment, the cuboid bone support projection 80 is arranged to overlap the calcaneus front support projection 90, and the cuboid bone support projection 80 corresponds to the cuboid bone 18 to the navicular bone 16 of the foot. Including the part, the thickness is gradually reduced by tilting downward toward the left and right side edges, and the thickness is gradually reduced by tilting downward in the front-rear direction from the part corresponding to the cuboid bone 18, and the thickness is gradually reduced in the front-back, left-right radial direction. Decrease.
Since the cuboid bone support protrusion 80 is provided, the cuboid bone 18 and the calcaneus 12 are supported while the arch shape including the calcaneocuboid joint between the cuboid bone 18 and the calcaneocuboid 12 is maintained and the foot is allowed to move. Since it is stabilized, distortion of the calcaneocuboid joint is reduced, and the entire tarsal bone including the cuboid bone 18 and the calcaneus 12 is stabilized in its natural state. Since the joints of the foot can move freely, the function of the foot can be enhanced.

The above-described embodiment is one aspect of the present invention, and can of course be modified as appropriate without departing from the gist of the present invention.
For example, in the above-described embodiment, the sole body 3 is molded integrally, but the separate convex portion 2, the surface-side protrusion 100, and the back-side protrusion 200 are detachably attached to the flat sole body material. You can Further, by forming the sole body 3 into a plurality of layers and mounting the convex portion 2 and the front surface side projection portion 100 and the rear surface side projection portion 200 on the intermediate layer, it is possible to form unevenness on the surface material. The cuboid bone support projection 80, the front calcaneus support projection 90, and the surface side projection 100 were formed solid, but the cuboid bone support projection 80, the front calcaneus support projection 90, and the surface side projection 100, the inside of the back surface side projecting portion 200 may be hollow.

The footwear of the present invention is intended to improve standing posture and motor function, and is not only suitable for daily use, but also for medical use for treatment and rehabilitation, and training for health promotion. It is suitable for a wide variety of footwear, such as footwear for men.

1 Sandals (footwear)
3 sole body 3A surface (upper surface)
3B back side (lower side)
12A calcaneal tubercle (anterior calcaneus)
18 cuboid bone 26A ball of big toe 34A ball of lesser toe 36 first proximal phalanx 38 second proximal phalanx 44 fifth proximal phalanx 80 cuboid bone supporting protrusion 90 calcaneus front supporting protrusion 100 superficial side protrusion (surface side ball support)
110 front part 111 gap 120 lateral arch 121 medial longitudinal arch 122 lateral longitudinal arch 200 back side protrusion (back side ball support part)

Claims (6)

comprising a sole body on which the foot is placed, and a string or belt provided to prevent the sole body from separating from the foot,
The sole body protrudes from the surface of the sole body to support the calcaneal tubercle of the foot and stabilize the calcaneus in order to maintain the medial longitudinal arch, the lateral longitudinal arch and the lateral arch of the foot. a convex portion, a surface-side ball-of-toe support portion that protrudes from the surface of the sole body and supports the ball of the foot and the ball of the foot, and a thin front portion formed in front of the surface-side ball-of-toe support portion. and a back side ball support portion that protrudes from the back surface of the sole body, supports the ball of the foot and the ball of the little toe, and forms a gap between the front portion and the contact surface of the sole body. , with footwear. The footwear according to claim 1, wherein the outer shape of the front side ball supporting portion is formed larger than the outer shape of the back side ball supporting portion. On the calcaneus of the foot, the front upper end of the calcaneus serves as a force point, and the rear portion of the calcaneus serves as a fulcrum, and a moment is applied around the fulcrum. 3. Footwear according to claim 1 or 2, supporting the calcaneal tuberosity of the foot. 4. Footwear according to any one of claims 1 to 3, wherein the front edge of the surface side ball-supporting portion extends along a line connecting the first proximal phalanx to the fifth proximal phalanx of the foot. The footwear according to any one of claims 1 to 4, wherein the backside ball-supporting portion extends in a belt shape in the width direction. A cuboidal bone supporting convex portion is arranged so as to overlap with the calcaneal front supporting convex portion,
The cuboid bone supporting protrusions are inclined downward from the cuboid bone of the leg to the left and right side edges including the portion corresponding to the navicular bone, and gradually decrease in thickness, and extend forward and backward from the portion corresponding to the cuboid bone. 6. Footwear according to any one of claims 1 to 5, wherein the thickness of the footwear gradually decreases in the front, back, left, and right radial directions.

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