WO2014132498A1

WO2014132498A1 - Sandal

Info

Publication number: WO2014132498A1
Application number: PCT/JP2013/081234
Authority: WO
Inventors: 松下　剛
Original assignee: 株式会社Ｍｔｇ
Priority date: 2013-02-27
Filing date: 2013-11-20
Publication date: 2014-09-04
Also published as: KR20150122168A; SG11201506117VA; CN203662098U; TW201433276A; JP2015051256A; JP2015051258A; CN104000344A; HK1199800A1

Abstract

A sandal (10) comprises a main body (11). The main body (11) is configured from a main body forepart (12) which bears a forepart of a foot, including toes, and a main body aft part (13), which bears an aft part of a foot, including the heel. A weight balance of the sandal (10) is set such that the main body forepart (12) is lower than the main body aft part (13). A first curve face (12a), which is curved such that a middle part in the fore-aft direction protrudes further downward in the fore-aft direction than both ends, is formed upon the bottom face of the main body forepart (12), and a second curve face, which is curved such that a middle part in the left-right direction protrudes further downward in the left-right direction than both ends, is formed upon said bottom face. A depression part (15) which opens aft and toward both lateral parts is formed in the bottom part of the main body aft part (13). A thong (16) which is held between the toes is disposed upon the upper face of the main body forepart (12).

Description

Sandals

The present invention relates to a sandal capable of realizing a beautiful leg by an exercise effect.

In recent years, for example, as shown in Patent Document 1 and Patent Document 2, footwear such as sandals aiming at an exercise effect has been proposed.

In the configurations described in Patent Document 1 and Patent Document 2, the bottom surface of the footwear is curved in an arc shape so that an intermediate portion in the front-rear direction protrudes downward from both ends in the front-rear direction.

Special table 2009-528879 Utility Model Registration No. 3168694

In the sandals having the conventional configuration described in Patent Document 1 and Patent Document 2, the bottom surface is curved as described above. However, since the center of gravity of these sandals is set at the center in the front-rear direction, when the wearer wears the sandals, the center of gravity is the same as that of ordinary shoes and sandals, and a sufficient exercise effect It was difficult to get.

The present invention has been made by paying attention to such problems existing in the conventional technology. The object is to provide a sandal that can provide a sufficient exercise effect.

In order to achieve the above object, according to one aspect of the present invention, a sandal including a main body is provided, a heel holding portion is formed at a rear portion of the main body, and an intermediate portion in the front-rear direction of the bottom surface of the main body is It curves so as to protrude downward from both ends in the direction, and the center of gravity of the sandal is set at the front part of the main body.

It is desirable that the bottom surface of the main body is curved so that an intermediate portion in the left-right direction protrudes downward from both ends in the left-right direction.

It is desirable that the bottom surface of the main body has a spherical shape that bulges downward.

It is desirable that a nostril is provided on the upper surface of the front part of the main body, and an upper holding part for holding the instep is provided at the upper end of the nose.

It is desirable to provide an instep holding part for holding the instep on the front part of the main body.

It is desirable that the upper holding part is spanned between both ends of the main body in the left-right direction.

It is desirable that the upper holding portion includes a pair of holding pieces that are close to each other while extending upward from both ends in the left-right direction of the main body, and can be expanded between the tips of both holding pieces.

It is desirable that the ends of the holding pieces are connected by a connecting portion.

It is desirable that the width of the connecting portion in the front-rear direction is narrower than the width of the holding piece, and the thickness of the connecting portion is thinner than the holding piece.

It is desirable that the front bottom surface of the main body is provided with a non-slip portion.

It is desirable that the rear part of the main body is provided with a loop that can be hung on a bag.

According to the sandals of the present invention, since the center of gravity is set at the front part of the main body, the wearer is likely to be in a state close to toes when wearing the sandals, and a sufficient exercise effect can be obtained.

The side view which shows the sandal by one Embodiment of this invention. The perspective view which shows the state which looked at the sandal from diagonally upward of the rear part. The perspective view which shows the state which looked at the sandal from diagonally downward. The top view which shows a sandal. Front sectional view of sandals. The left sectional view of a sandal. It is a figure which shows the effect | action of a sandal, Comprising: The side view which shows the state which put on the sandal and stood still. The side view which shows the state which starts a walk from the state of FIG. The side view which shows the state which moved the weight a little forward from the state of FIG. FIG. 10 is a side view showing a state in which the weight is moved forward most from the state of FIG. The perspective view which shows the sandal of another example of this invention, and shows the state which looked at the sandal from diagonally upward of the rear part. The perspective view which shows the sandal of another example of this invention, and shows the state which looked at the sandal from diagonally upward of the rear part. Sectional drawing of the main body rear part of the sandal of FIG. The perspective view which shows the sandal of another example from which this invention differs further, and shows the state which looked at the sandal from diagonally upward of the rear part. Sectional drawing of the instep holding | maintenance part of the sandal of FIG.

Hereinafter, embodiments embodying the present invention will be described in detail with reference to FIGS.

5 and 6 show one of the pair of left and right sandals 10 (sandals for the right foot). Each sandal 10 includes a main body 11, and the main body 11 includes a skeleton 19 made of hard resin. The skeleton part 19 is covered with a jacket part 20 made of a soft resin. The jacket part 20 makes the touch which the sandal 10 gives to a sole. As the hard resin, a hard synthetic resin such as polyurethane resin, polyvinyl chloride resin, or polyester resin is used. In addition to ethylene-vinyl acetate copolymer resin (EVA), thermoplastic elastomers such as polyethylene elastomers and polystyrene elastomers are used as the soft resin.

As shown in FIGS. 1 and 2, the main body 11 of the sandal 10 includes a main body front portion 12 on which a front portion including a toe is placed, a main body rear portion 13 on which a rear portion including a heel is placed and acts as a heel holding portion. Is provided. As shown in FIGS. 5 and 6, the bottom surface 12 </ b> A of the main body front portion 12 includes a first curved surface 12 a that is curved so that intermediate portions in the front-rear direction protrude downward from both ends in the front-rear direction, and a left-right direction The second curved surface 12b is curved so that the middle portion of the projection protrudes downward from both ends in the left-right direction. The curvature of the second curved surface 12b is set larger than the curvature of the first curved surface 12a. For example, the radius of curvature of the first curved surface 12a at the contact surface is preferably in the range of 100 to 150 mm, and the radius of curvature of the second curved surface 12b is preferably in the range of 50 to 90 mm. Since the first and second

curved surfaces

12a and 12b are thus formed, the bottom surface 12A of the main body 11 has a bulging spherical shape.

As shown in FIGS. 1 and 2, the center of gravity of the sandal 10 is set at the front portion 12 of the main body. In other words, the weight balance of the sandal 10 and the curvature of the first curved surface 12a are set so that the main body front portion 12 is lower than the main body rear portion 13 when the sandal 10 is not in use. Thereby, when the wearer wears the sandal 10 and is stationary, the weight of the wearer is supported by the main body front portion 12. On the upper surface of the rear portion 13 of the main body, a heel mounting portion 14 formed in a gentle concave shape is formed. The heel mounting portion 14 is made of a soft material and has a substantially egg shape in plan view.

As shown in FIG. 1, a concave portion 15 is formed at the bottom of the main body rear portion 13 so as to open toward the rear and both sides. The concave portion 15 is configured to reduce the mass of the main body rear portion 13 and shift the entire center of gravity of the sandal 10 to the main body front portion 12. Thereby, it is comprised so that the weight balance of the whole sandal 10 may become near.

As shown in FIGS. 1 and 5, a nose 16 that protrudes so as to be sandwiched between the toe and forefinger is formed on the upper surface of the main body front portion 12. The umbilical cord 16 is disposed slightly deviated on the inner side of the foot toward the sandals for the left foot from the center position in the left-right direction on the upper surface of the main body front portion 12. Further, the umbilical cord 16 is inclined so that the upper part thereof is disposed rearward of the lower part. The cross section of the umbilical cord 16 is formed in a substantially elliptical shape that is long in the front-rear direction. For this reason, it is easy to pinch between the thumb and the index finger, and when the wearer wears the sandal 10, the wearer can firmly hold the snare 16 in a stable state with the thumb and the index finger.

As shown in FIGS. 1 and 4, an upper holding portion 17 is formed at the upper end portion of the umbilical cord 16 so as to extend rearward so as to hit the instep. The instep holding portion 17 has a curved shape along the instep surface. A metallic luster layer 18 by plating is provided on the upper surface of the upper holding portion 17 to enhance the design.

As shown in FIGS. 1 and 2, a protrusion 21 that presses the arch of the sole of the foot is provided on the upper surface of the main body 11 between the main body front portion 12 and the main body rear portion 13. The protrusion 21 is formed in a curved shape so as to hit almost the entire arch when the sandal 10 is worn.

As shown in FIG. 3, the bottom surface 12A of the main body front portion 12 is provided with a non-slip portion 22 that suppresses slippage between the main body front portion 12 and the floor surface. The anti-slip part 22 has an oval bottom. The anti-slip portion 22 is formed of a material having a high coefficient of friction such as synthetic rubber such as polyurethane rubber, natural rubber, and thermoplastic elastomer.

Next, the operation of the sandal 10 configured as described above will be described.

As shown in FIG. 7, the wearer puts the snare 16 between the thumb of the toe 25 and the forefinger and puts the sandal 10 on the instep holding portion 17 on the instep. In the state where the sandal 10 is worn, since the center of gravity of the sandal 10 is on the front side, a load on the lower part of the front part acts on the wearer. Therefore, the wearer is in a state close to standing on the toes. Furthermore, since the lower surface of the main body 11 is formed in a substantially spherical shape as a whole by the first curved surface 12a and the second curved surface 12b, the lower surface of the main body 11 is substantially in point contact with the floor surface. For this reason, the wearer of the sandal 10 needs to balance in the front-back direction, the left-right direction, and the synthetic | combination direction. In addition, in the state where the wearer wears the sandal 10, the wearer's foot 26 is arranged such that the toes 25 are lower than the heel 27, so that the wearer increases the weight of the toes 25. It will be supported by nearby parts. Accordingly, a large load acts not only on the calf muscles and thigh muscles, but also on the entire lower limbs, even in a stationary state or not in a stationary state, and these muscles are strongly stimulated and tightened.

Next, as shown in FIGS. 8 to 10, when the wearer walks while wearing the sandal 10, the contact point p between the main body 11 and the floor 24 continuously moves in the front-rear direction. Thereby, the wearer can perform weight shift smoothly. Therefore, a large load acts on the lower limbs and stable walking can be performed. Further, since the grounding point p between the main body 11 and the floor surface 24 forms a point contact, it is easy to rotate the sandal 10 around the grounding point, and the wearer can easily change the direction. .

Therefore, according to the above embodiment, the following effects can be obtained.

(1) Since the center of gravity of the sandal 10 of the above-described embodiment is on the front side, in the wearing state, the center of gravity of the wearer moves forward, and the wearer is guided to a forward leaning posture. In order to resist this, in other words, the wearer is in a state of being close to the tiptoe to struggle. Therefore, since a heavy load is applied to the calves and thighs, the wearer of the sandal 10 can obtain an effective exercise effect and realize a healthy beautiful leg. In addition, since the wearer's heel is supported at the rear part of the main body 11, the wearer can stand up and walk in a stable state.

(2) The sandal 10 of the above embodiment includes the main body 11 having the upper holding part 17. The bottom surface of the main body 11 is curved so that an intermediate portion in the front-rear direction protrudes downward from both ends in the front-rear direction. Further, the bottom surface of the main body 11 is curved so that an intermediate portion in the left-right direction protrudes downward from both ends in the left-right direction. For this reason, in a state where the wearer wears the sandal 10, the sandal 10 is tilted in the front-rear direction, the left-right direction, and the synthesis direction (oblique direction). Therefore, the wearer will step on and can obtain an effective exercise effect on the lower limbs such as calves and thighs, and a healthy leg can be realized as described above.

(3) In addition, since the snare 16 is grasped by the toes, the sandal 10 can be put up in a stable state and can be stood up or walked, and a more effective exercise effect can be obtained for a part such as an ankle. be able to.

(4) Since the instep holding portion 17 can be applied to the instep 28 of the foot 26, the sandal 10 is difficult to take off, and operations such as walking can be performed stably.

(5) Since the concave portion 15 is formed in the rear portion of the main body 11, the center of gravity of the main body 11 can be set on the front side of the main body 11 without using a weight or the like. Therefore, as described above, the wearer can balance the weight in a forward leaning posture. For this reason, a wearer's weight can be supported by the toe 25 of the whole, and the correct posture which the back muscles extended can be taken. Further, in this state, the wearer is close to a toe-standing posture, so that the calf muscles and thigh muscles are trained. In addition, since the wearer's heel is supported by the heel mounting portion 14, even if the posture is close to toe standing, the wearer's heel can stably stand up or walk.

(6) Since the main body front portion 12 makes point contact with the floor at the grounding point p, the weight of the wearer is supported at the grounding point p. For this reason, smooth rotation operation | movement centering on the grounding point p can be obtained, and it is convenient for a direction change.

(7) The main body 11 has a skeleton 19 made of hard resin, and the skeleton 19 is covered with an outer cover 20 made of soft resin. For this reason, the touch which the sandal 10 gives to a wearer's sole when a wearer wears the sandal 10 can be improved, hold | maintaining the intensity | strength and rigidity of the sandal 10.

(8) A non-slip portion 22 is provided on the bottom surface 12A of the main body front portion 12. Therefore, it is possible to stand and walk in a stable state while wearing the sandal 10 and to prevent the floor surface 24 from being damaged.

(9) Between the main body front portion 12 and the main body rear portion 13, a protrusion 21 that presses the arch of the sole is provided. For this reason, when the wearer wears the sandal 10, the sandal 10 can support the sole of the wearer in a stable state and can promote health by stimulating the arch.

It is also possible to change the above-described embodiment as follows.

As shown in FIG. 11, the umbilical cord 16 may be omitted, and the upper holding part 17 may be spanned between both side parts of the main body front part 12 in the left-right direction so as to have a gate shape.

As shown in FIGS. 12 and 13, the chord 16 is omitted, and the upper holding part 17 is configured by a pair of holding pieces 17 a that extend upward from both sides in the left-right direction of the main body front part 12 and approach each other. May be. The pair of holding pieces 17a rises toward the upper center of the front portion 12 of the main body, that is, toward the upper surface of the instep, and has elasticity. In this case, the ends of the holding pieces 17a may be opposed to each other with a space therebetween, or may overlap each other, but the holding pieces 17a are resistant to elasticity according to the height of the upper and the width of the foot in the left-right direction. Since it is expanded, the wearer can appropriately hold the sandal 10 while wearing the sandal 10, and the sandal 10 is easy to wear. FIG. 12 and FIG. 13 show an example in which the main body 11 is constituted by

core materials

11a and 11b laminated in two stages on the upper and lower sides. The

core materials

11a and 11b are made of EVA (ethylene vinyl acetate copolymer resin). It is made. These

core materials

11a and 11b are integrally connected by, for example, adhesion, thermal welding, ultrasonic welding, and vibration welding. Also. The

core materials

11a and 11b may be covered with the same or different skin material, and the skin material may be formed by integral molding or ultrasonic bonding. Furthermore, you may comprise the whole core material with a single member.

As shown in FIG. 12, the entire upper surface of the main body 11 may be gently dented so that the foot is wrapped from the sole side.

As shown by a two-dot chain line in FIG. 1, connecting

portions

171 and 172 may be formed between both side portions of the upper holding portion 17 and the main body front portion 12 in the left-right direction. In this case, the umbilical cord 16 may be omitted.

-You may comprise so that the connection part 171 corresponding to the inner side of a foot among the

connection parts

171 and 172 shown by a dashed-two dotted line in FIG. 1 and the chord 16 may be provided (the connection part 172 corresponding to the outer side of a foot is Not provided). In this configuration, the outside of the toe is not covered, and an open appearance can be obtained.

As shown in FIGS. 14 and 15, similarly to the configuration of FIGS. 12 and 13, the nose cord 16 may be omitted, and a pair of holding pieces 17 a extending toward the upper surface of the instep may be provided. However, unlike the configuration of FIGS. 12 and 13, a connecting portion 17 c having a small width and a small thickness is integrally formed between the holding pieces 17 a. For this reason, the connection part 17c does not restrain the movement of the instep holding | maintenance part 17 so much, and the instep holding | maintenance part 17 deform | transforms flexibly according to a motion of a leg | foot. Therefore, the sandal 10 is comfortable to wear. The connecting portion 17c may be wound with a cloth ribbon 30 made of black or the like serving as a design accent. However, the ribbon 30 is not always necessary and may be omitted. Further, in the embodiment shown in FIGS. 14 and 15, the envelope portion 20 made of EVA constitutes the entire skeleton, and the EVA is softer than the envelope portion 20 in the recess 201 on the upper surface of the envelope portion 20. The bottom cover 202 is fitted. Accordingly, the sole cover 202 is in contact with the soles over a wide area and becomes familiar, and exhibits a buffering effect. For this reason, it becomes comfortable. A slipping cloth 29 for preventing slipping is attached to the upper surface of the bottom covering 202.

As shown by a two-dot chain line in FIG. 1 and FIG. 2, a loop 13 a that is hung on the wearer's heel may be provided in the main body rear portion 13. If it does in this way, a wearing state will be stabilized and a wearer can walk stably.

-The anti-slip part 22 of the bottom surface 12A of the main body front part 12 is not constituted by a separate member as in the above-described embodiment, but is constituted by uneven portions formed on the bottom surface 12A, or an anti-slip agent is applied. Or may be configured.

As shown by a two-dot chain line in FIGS. 1 and 14, the concave portion 15 at the bottom of the main body rear portion 13 may be omitted.

· The anti-slip portion 22 on the bottom surface 12A of the main body front portion 12 may be omitted.

· A protrusion that stimulates the acupoints on the sole may be provided at an appropriate position on the upper surface of the main body 11.

DESCRIPTION OF SYMBOLS 10 ... Sandal, 11 ... Main body, 12 ... Main body front part, 12A ... Bottom surface, 12a ... First curved surface, 12b ... Second curved surface, 13 ... Main body rear part, 13a ... Loop, 15 ... Recess, 16 ... Throat, 17 ... Upper Holding part, 17a ... Holding piece, 17c ... Connecting part, 19 ... Skeletal part, 20 ... Outer part, 21 ... Protruding part, 22 ... Non-slip part, 26 ... Leg, 27 ... Saddle, 28 ... Instep.

Claims

In sandals with a body,
A heel holding portion is formed at the rear of the main body, and the bottom surface of the main body is curved such that an intermediate portion in the front-rear direction projects downward from both ends in the front-rear direction, and the center of gravity of the sandal is Sandals characterized by being set at the front.
2. The sandal according to claim 1, wherein the bottom surface of the main body is curved such that an intermediate portion in the left-right direction protrudes downward from both ends in the left-right direction.
3. The sandal according to claim 1, wherein the bottom surface of the main body has a spherical shape that bulges downward.
The upper surface of the front portion of the main body is provided with a thong, and the upper end of the thong is provided with a back holding portion for holding the back of the foot. Sandals.
The sandal according to claim 1 or 2, wherein an instep holding portion for holding an instep is provided at a front portion of the main body.
The sandal according to claim 5, wherein the upper holding part is spanned between both ends of the main body in the left-right direction.
The said upper holding part is provided with a pair of holding piece which mutually approaches while extending upward from the both ends in the left-right direction of the said main body, It can expand between the front-end | tips of both holding pieces. Sandals described in.
The sandals according to claim 7, wherein the ends of the holding pieces are connected by a connecting portion.
The sandal according to claim 8, wherein the width of the connecting portion in the front-rear direction is narrower than the width of the holding piece, and the thickness of the connecting portion is thinner than the holding piece.
The sandal according to claim 1 or 2, wherein a bottom surface of a front portion of the main body includes a non-slip portion.
The sandal according to claim 1, wherein a rear portion of the main body includes a loop that is hung on a heel.