Footwear for exercise

Abstract

A footwear for exercise providing a superior portability to that of a sports shoe and providing a comparative comfort of exercise with that of a sports shoe is provided. The footwear 1 L includes a covering member 10 L and an insole member 11 L. On an outer surface of the covering member 10 L, a rubber member 15 L to cover an entire bottom side portion of the covering member 10 L where the insole member 11 L is placed, a rubber member 16 L to extend from a front end of the covering member 10 L to a nearby portion of a step-in opening 13 L of the covering member 10 L, and a rubber member 17 L to extend from a rear end of the covering member 10 L to a nearby portion of a step-in opening 13 L of the covering member 10 L, are provided.

Claims

1 . Footwear for exercise comprising: a covering member formed by sewing with elastic fabric in a conforming sock shape to a lower part of a malleolus of a user's foot; an insole member made of impact absorption material formed in a conforming sheet-like shape to the foot sole shape of the user, the insole member being placed in the covering member between the covering member and the foot sole of the user; a first rubber member attached on the outer surface of the covering member as to cover an entire bottom side portion of the covering member where the insole member is placed; a second rubber member attached on the outer surface of the covering member as to extend from a front end of the covering member to a nearby portion of a step-in opening of the covering member; and a third rubber member attached on the outer surface of the covering member as to extend from a rear end of the covering member to a nearby portion of a step-in opening of the covering member. 2 . The footwear for exercise according to claim 1 , wherein a fourth rubber member attached on the outer surface of the covering member as to be in an elongated shape of a perpendicular direction to a extending direction of the second rubber member. 3 . The footwear for exercise according to claim 2 , wherein the first rubber member, the second rubber member, the third rubber member and the fourth rubber member are made of rubber material, the measured hardness of the rubber material being in a range from 30 to 60 with a type A durometer defined in JIS K 6253.
TECHNICAL FIELD [0001] This invention relates to footwear to be worn on during exercise. BACKGROUND ART [0002] Running shoes or jogging shoes which are kinds of exercise shoes are widely used. An art of this kind of shoes is disclosed in Patent literature 1. In Patent literature 1, a running shoe is disclosed in which a ring shaped portion is provided in a heel portion of a shoe to be engaged with a fixing belt, and the engaged fixing belt is wrapped around an ankle region of a user above a malleolus. With the art, the foot does not slip out from the shoe even in a case the heel portion is stepped on by a following runner in a packed group of runners. Thus, with the art, a case in which a runner is stepped on by the following runner at the heel portion and caused to be felled and injured is prevented to be occurred. CITATION LIST Patent Literature [0003] Patent Literature 1: Japanese Patent Application Publication No. 2003-009907 SUMMARY OF INVENTION Technical Problem [0004] Incidentally, in persons doing exercises such as running as daily activities, some eager to carry exercise shoes to business trip destinations or travel destinations and to do exercises there. However, the conventional exercise shoes of this kind are bulky and thus cause a problem to occupy a large space inside of a suitcase and so forth. [0005] This invention is intended to provide a footwear for exercise both providing a superior portability to that of a sports shoe and providing a comparative comfort in exercise with that of a sports shoe. Solution to Problem [0006] In order to solve the above problem, this invention provides a footwear for exercise comprising: a covering member formed by sewing with elastic fabric in a conforming sock shape to a lower part of a malleolus of a user's foot; an insole member made of impact absorption material formed in a conforming sheet-like shape to the foot sole shape of the user, the insole member being placed between the covering member and the foot sole of the user in the covering member; a first rubber member attached on the outer surface of the covering member as to cover an entire bottom side portion of the covering member where the insole member is placed; a second rubber member attached on the outer surface of the covering member as to extend from a front end of the covering member to a nearby portion of a step-in opening of the covering member; and a third rubber member attached on the outer surface of the covering member as to extend from a rear end of the covering member to a nearby portion of a step-in opening of the covering member. [0007] In the footwear of this invention, a covering member formed by sewing with elastic fabric and rubber members attached on a part of the outer surface of the covering member are provided. The covering member is rolled as its front end being inserted into the step-in opening and then is packed in a substantially same size of a fist. In addition, the first rubber member is attached on the outer surface of the covering member as to cover an entire bottom side portion of the covering member where the insole member is placed. With the feature, a user can wear the footwear on the foot and can run in the forward direction with kicking the ground surface firmly. In addition, on the outer surface of the covering member, a second rubber member is attached as to extend from a front end of the covering member to a nearby portion of a step-in opening of the covering member, and a third rubber member is attached as to extend from a rear end of the covering member to a nearby portion of a step-in opening of the covering member. With the feature, in a running with the footwear worn on, the covering member is reduced to be twisted in the right and left and the foot is reduced to be popped out from the covering member. Accordingly, with this invention, a user can carry the footwear for exercise to a difficult destination to carry sports shoes such as business trip destinations, travel destinations and so forth, for example, and can do exercises there comfortably as if he wears a sports shoe on. BRIEF DESCRIPTION OF DRAWINGS [0008] FIG. 1 is a perspective view of a footwear for exercise according to an embodiment of this invention; [0009] FIG. 2 shows an internal structure and an insole member of the footwear in FIG. 1 ; [0010] FIG. 3 is a bottom view and top view of a covering member of the footwear of FIG. 1 ; and [0011] FIG. 4 is a rear view of a covering member of the footwear of FIG. 1 . DESCRIPTION OF EMBODIMENTS [0012] An embodiment of this invention is described below with referring to the drawings. FIG. 1 is a perspective view of a footwear 1 L for exercise and a footwear 1 R for exercise according to an embodiment of this invention. The footwear 1 L and the footwear 1 R are worn on a left foot and a right foot of a user when the user does various exercises such as running and gymnastic exercises. [0013] FIG. 2(A) shows an internal structure of the footwear 1 L in FIG. 1 . As shown in FIG. 2(A) , the footwear 1 L includes a covering member 10 L and an insole member 11 L. FIG. 2(B) is a perspective view of the insole member 11 L in FIG. 2(A) . FIG. 2(C) shows the insole member 11 L in FIG. 2(B) viewing from the bottom. FIG. 3(A) is a top view of the covering member 10 L of the footwear 1 L. FIG. 3(B) is a bottom view of the covering member 10 L. FIG. 4 is a rear view of the covering member 10 L. In the footwear 1 R, a covering member 10 R and an insole member 11 R are formed in mirror symmetric structures to the covering member 10 L and the insole member 11 L of the footwear 1 L. [0014] The covering member 10 L is formed by sewing with fabric for socks having both water repellency and elasticity, more preferably, with fabric woven with front yarns of cotton or silk and back yarns of nylon or polyurethane, and is formed in a conforming sock shape to a lower part of a malleolus of a user's foot. In addition, the insole member 11 L is made of an EVA (ethylene-vinyl acetate) material having impact absorption capability, and is formed in a conforming sheet-like shape to the foot sole shape of a user. [0015] As shown in FIG. 3(A) and FIG. 4 , an step-in opening 13 L is provided in the top portion near the rear end of the covering member 10 L. The step-in opening 13 L is formed within an elastic ring shaped band 14 L, and the band 14 L is made from fabric woven with rubber thread. On the outer surface of the covering member 10 L, rubber members 15 L, 16 L, 17 L and 18 L-k (k= 1 to 3 ) are attached. [0016] The rubber members 15 L, 16 L, 17 L, and 18 L-k (k= 1 to 3 ) are made of rubber material, and the measured hardness of the rubber material is in a range from 30 to 60 at 20 degrees Celsius with a type A durometer defined in JIS K 6253. More specifically, rubber member 15 L covers an entire bottom side portion 40 L in FIG. 3(C) of the outer surface of the covering member 10 L where the insole member 11 L is placed. The rubber member 15 L has a peripheral edge EDG extending in an upper side of the outer surface of the bottom portion 40 L of the covering member 10 L. Both of the width of the front end portion of the covering member 10 L covered by the rubber member 15 L and the gap between the peripheral edge EDG of the rubber member 15 L in the front end side of the bottom portion 40 L are wider than both of the width of the foot arch portion of the covering member 10 L covered by the rubber member 15 L and the gap between the peripheral edge EDG of the rubber member 15 L in the foot arch side of the bottom portion 40 L. [0017] The rubber member 16 L is formed on the outer surface of the covering member 10 L in an extending bar shape from a front end of the covering member to a nearby portion of elastic band 14 L. The rubber member 16 L is bended to be formed in a hook shape in the side view. The front end of the rubber member 16 L is connected with the rubber member 15 L at a front end of a longitudinal groove 31 L in FIG. 3(B) . The rear end portion of the rubber member 16 L to the side of the elastic band 14 L is formed in a substantially crescent shape as to extend in the right side and left side. The side extended portions by the crescent shape of the rubber member 16 L are bended inwardly to conform to the round shape of the instep of a user's foot. [0018] The rubber member 17 L is formed on the outer surface of the covering member 10 L in an extending bar shape from a rear end of the covering member to a nearby portion of elastic band 14 L. The lower end of the rubber member 17 L is connected with the rubber member 15 L at a rear end of the longitudinal groove 31 L in FIG. 3(B) . As shown in FIG. 4 , the upper end portion of the rubber member 17 L to the side of the elastic band 14 L is formed in a shape as to extend in the right side and left side. The side extended portions in the right side and the left side at the upper end of the rubber member 17 L are bended inwardly to conform to the round shape of the base portion of the Achilles tendon of a user's foot. [0019] Each of the rubber members 18 L-k (k= 1 to 3 ) is formed in an elongated bar shape. Within the rubber member 18 L-k (k= 1 to 3 ), the rubber member 18 L- 3 is placed at a distant position in the front end side from the rear end of the rubber member 16 L, and formed in a extending bar shape in the right direction and the left direction from the rubber member 16 L. The rubber member 18 L- 2 is placed at a distant position in the front end side from the rubber member 18 L- 3 , and is formed in a extending bar shape in the right direction and the left direction. The rubber member 18 L- 1 is placed at a distant position in the front end side from the rubber member 18 L- 2 , and is formed in a extending bar shape in the right direction and the left direction. The length of the rubber member 18 L- 2 is longer than that of the rubber member 18 L- 1 . The length of the rubber member 18 L- 3 is longer than that of the rubber member 18 - 2 . The rubber members 18 L-k (k= 1 to 3 ) are bended inwardly to conform to the round shape of the instep of a user's foot. [0020] As shown in FIG. 3(B) , in the bottom surface of the rubber member 15 L, a longitudinal groove 31 L and transverse grooves 32 L-i (i= 1 to 6 ) and 33 L-i (i= 1 to 6 ) are formed. The longitudinal groove 31 L is formed in a straight line shape from the front end to the rear end in the bottom surface of the rubber member 15 L. The transverse grooves 32 L-i (i= 1 to 6 ) are formed in a extending shapes from the longitudinal groove 31 L in the angled left back direction, and arrayed by a distance W1, for example W1 is 2 centimeters, started from the front end of the longitudinal groove 31 L. The crossing angles θ 2 of the longitudinal groove 31 L and the transverse grooves 32 L-i are 45 degrees. Each of the outer ends of the transverse grooves 32 L-i (i= 1 to 6 ) reaches at the peripheral edge of the bottom surface of the rubber member 15 L. [0021] The transverse grooves 33 L-i (i= 1 to 6 ) are formed in a extending shapes from the longitudinal groove 31 L in the angled right back direction, and arrayed by a distance W1, started from the front end of the longitudinal groove 31 L. The crossing angles θ2 of the longitudinal groove 31 L and the transverse grooves 33 L-i are 45 degrees. Each of the outer ends of the transverse grooves 33 L-i (i= 1 to 6 ) reaches at the peripheral edge of the bottom surface of the rubber member 15 L. [0022] The depth of the longitudinal groove 31 L is 1 millimeter, for example, and thus is greater than the depths of the transverse grooves 32 L-i (i= 1 to 6 ) and 33 L-i (i= 1 to 6 ) which are formed in 0.5 millimeter depth, for example. The widths in the perpendicular directions to the extending directions of the longitudinal groove 31 L and the transverse grooves 32 L-i (i= 1 to 6 ) and 33 L-i (i= 1 to 6 ) are formed in the same size, for example, 5 millimeters widths. [0023] FIG. 3(C) is a cross sectional view along with the line C-C′ in FIG. 4 . As shown in FIG. 3(C) , in the bottom portion 40 L of the covering member 10 L where the insole member 11 L is placed, a plurality of project portions S are formed with rubber material. The project portion S is formed in a perfect circle shape. The project portions S are arrayed in same adjacent distances on the bottom portions 40 L. These project portions S are projected in the above direction of the bottom portion 40 L as to form a patterned indented portion on the bottom portion 40 L. [0024] As shown in FIG. 2(B) , in the top surface 51 L of the insole member 11 L, a dimple portion 53 L to the side of the bottom surface 52 L is formed at a beneath portion of a heel bone of a user. In the top surface 51 L of the insole member 11 L, a dimple portion 54 L to the side of the bottom surface 52 L is formed at a beneath portion of a metatarsal bones of the user. in the top surface 51 L of the insole member 11 L, a dimple portion 55 L to the side of the bottom surface 52 L is formed at a beneath portion of a toe bones of the user. [0025] The depths of the dimple portions 53 L, 54 L and 55 L are 5 millimeters from the top surface 51 L of the insole member 11 L to the bottoms of the dimple portions. In addition, as shown in FIG. 2(C) , the bottom surface 52 L of the insole member 11 L is formed in a flat. As described above, the insole member 11 L of the footwear 1 L and the insole member 11 R of the footwear 1 R are in mirror symmetric structures each other. And thus, the insole member 11 L in the covering member 10 L and the insole member 11 R in the covering member 10 R can be exchangeable each other with each of them turned the top surface and the bottom surface over. [0026] Above descriptions are the detailed structures of this embodiment. With this embodiment, technical effects described below are obtained. [0027] First, the footwear 1 L of this embodiment includes a covering member 10 L formed with elastic fabric, and rubber members 15 L, 16 L, 17 L and 18 L-k (k= 1 to 3 ) covering a part of the outer surface of the covering member. In addition, the footwear 1 R includes a covering member 10 R formed with elastic fabric, and rubber members 15 R, 16 R, 17 R and 18 R-k (k= 1 to 3 ) covering a part of the outer surface of the covering member. The measured hardness of the rubber members 15 L, 16 L, 17 L and 18 L-k (k= 1 to 3 ) on the covering members 10 L and 10 R are in a range from 30 to 60 with a type A durometer defined in J1S K 6253 and thus are softer than that of a sole of a sports shoe. Thus, the covering members 10 L and 10 R can be rolled as their front ends being inserted into the step-in openings 13 L and 13 R and then are packed in the substantially same sizes of fists. The rolled covering members 10 L and 10 R are about in the first sizes and can be carried easily. In addition, the rubber members 15 L and 15 R of the footwears 1 L and 1 R cover the entire bottom side portions on the outer surfaces of the covering members where the insole members 11 L and 11 R are placed. With the features, a user can worn the footwears 1 L and 1 R on the feet and can run in the forward direction with kicking the ground surface firmly. In addition, on the outer surfaces of the covering member 10 L and 10 R, the rubber members 16 L and 16 R are attached as to extend from front ends of the covering members 10 L and 10 R to a nearby portions of the step-in openings 13 L and 13 R of the covering members 10 L and 10 R, and rubber members 17 L and 17 R are attached on the outer surfaces of the covering members as to extend from rear ends of the covering members to a nearby portions of the step-in openings of the covering members. With the features, when a user wears the footwears 1 L and 1 R on the left foot and the right foot and runs, the internal surfaces of the covering members 10 L and 10 R and the insole members 11 L and 11 R are tightly fit around the left foot and the right foot of the user. As a result, according to this embodiment, a user can carry the footwears 1 L and 1 R for exercise to a difficult destination to carry sports shoes such as business trip destinations, travel destinations and so forth, and can do exercises there comfortably as if he wears a sports shoe on. [0028] Second, on the outer surfaces of the covering member 10 L and 10 R of this embodiment, the rubber members 18 L-k and 18 R-k are formed as to bended inwardly to conform to the rounds of the insteps of user's feet. In addition, the rear end portions of the rubber members 16 L and 16 R in the end portion sides of the elastic bands 14 L and 14 R are formed as to extend in the right sides and the left sides, and the extended portions in the right sides and the left sides are bended inwardly to conform to the round of the insteps of user's feet. In addition, the upper ends of the rubber members 17 L and 17 R in the end portion sides of the elastic bands 14 L and 14 R are formed as to extend in the right sides and the left sides, and the extended portions in the right sides and the left sides are bended inwardly to conform to the round of the base portions of Achilles tendons of user's feet. Thus, when a user wears the covering members 10 L and 10 R on the left foot and the right foot, the insteps of the left foot and the right foot are held by the inwardly bended portions of the rubber members 18 L-k and 18 R-k and by the inwardly bended rear end portions of the rubber members 16 L and 16 R, and the heels of the left foot and the right foot are held by the inwardly bended portions of the rubber members 17 L and 17 R. Accordingly, even in a case a user moves in a side direction as the weight being shifted, for example, jumps to the side direction, the covering members 10 L and 10 R are reduced to be twisted in the side direction. As a result, when a user does this kind of exercises, the left foot is reduced to be popped out from the covering member 10 L and the right foot is reduced to be popped out from the covering member 10 R. [0029] Third, because the footwears 1 L and 1 R of this embodiment are constituted with the covering members 10 L and 10 R of fabric or cloth and the rubber members 15 L, 16 L, 17 L and 18 L-k (k= 1 to 3 ) being bonded or fixed on the outer surfaces of the covering members, the footwears can be washed with water in a washing machine and the dirt on the fabric can be easily removed. [0030] Fourth, in this embodiment, in the bottom portions 40 L and 40 R of the internal surfaces of the covering members 10 L and 10 R where the insole members 11 L and 11 R are placed, the indented portions are formed. Thus, with this embodiment, the insole members 11 L and 11 R can be gripped with stronger forces. [0031] Fifth, in this embodiment, the insole members 11 L and 11 R are made of EVA. EVA is known as a material having a more flexible and thus gives softer feel than other resin materials used in the same purpose. Thus, this embodiment can provide a higher comfort in a running than a case in which the other resin material is used for the insole members 11 L and 11 R. [0032] Sixth, in this embodiment, the bottom surfaces 52 L and 52 R of the insole members 11 L and 11 R are formed in flat surfaces, and the top surfaces 51 L and 52 R of the insole members 11 L and 11 R are formed in the patterned indented surfaces at a beneath portion of a heel bone, at a beneath portion of a metatarsal bones and at beneath portion of a toe bones of the user's feet. Thus, the insole member 11 L in the covering member 10 L and the insole member 11 R in the covering member 10 R can be exchangeable each other with each of them turned the top surface and the bottom surface over. Some users of the footwears 1 L and 1 R may prefer the flat surfaces in exercise of the insole members 11 L and 11 R for the left foot and the right foot, some users may prefer the conformed dimpled shapes in exercise to the foot soles at the beneath portions of the left foot and the right foot of the insole member 11 L and 11 R. In addition, some users may prefer the flat surfaces in a exercising case with jumps such as running for the left foot and the right foot, and may prefer the conformed dimpled shapes in other exercising case without jumps such as gymnastic exercises to the foot soles at the beneath portions of the left foot and the right foot. With this embodiment, users can select the fitting feels of the insole members 11 L and 11 L in accordance with each of preferred conforming themselves, and can do their exercises more comfortably. [0033] Seventh, in this embodiment, the grooves 31 L and 31 R are formed from the front end to the rear end of the rubber members 15 L and 15 R. Thus, this embodiment can improve the straight-running stability when users wear the footwears 1 L and 1 R on and run. [0034] Eighth, in this embodiment, at the step-in openings 13 L and 13 R of the covering members 10 L and 10 R, the elastic bands 14 L and 14 R with woven rubber thread is provided. Thus, with this embodiment, the feet are prevented from being popped out from the covering members 10 L and 10 R. [0035] The above description is an embodiment of this invention, and the embodiment may be modified as follows. [0036] (1) In the above embodiment, the project portions S formed on the bottom section 40 L is formed in perfect circle shapes. Instead of the structure, the project portions S may be replaced to project portions shaped in stripes. [0037] (2) In the above embodiment, the rubber members 18 L-k are provided by three. Instead of the structure, the rubber members 18 L-k may be provided by one or two, or provided by five or more. [0038] (3) In the above embodiment, in the bottom surface of the rubber member 15 L, both of the longitudinal groove 31 L and the transverse grooves 32 L-i (i= 1 to 6 ) and 33 L-i (i= 1 to 6 ) are provided. Instead of the structure, only the longitudinal groove 31 L may be provided in the bottom surface of the rubber member 15 L. REFERENCE SIGNS LIST [0000] 1 . . . footwear, 10 . . . covering member, 11 . . . insole member, 13 . . . step-in opening, 14 . . . elastic band, 15 , 16 , 17 , 18 . . . rubber member, 31 . . . longitudinal groove, 32 , 33 . . . transverse groove, 40 . . . bottom portion, 51 . . . top surface, 52 . . . bottom surface, 53 , 54 , 55 . . . dimple portion

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