JP3019544U - Athletic shoes - Google Patents

Abstract

(57) [Summary] [Purpose] An object of the present invention is to provide athletic shoes that can perform calf strength training and stretching just by wearing them and have a posture improving effect. [Structure] A straight line from the lower surface of the toe fulcrum to the lower surface of the heel has an inclination of 10 degrees or more and 15 degrees or less with respect to the walking surface while the toe portion 4 of the shoe sole 2 is in contact with the walking surface, and the heel portion 3 walks. The lower surface of the toe portion 4 is configured to have an inclination of 20 degrees or more and 25 degrees or less with respect to the walking surface in a state of being in contact with the surface.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to athletic shoes, and more particularly to athletic shoes capable of strengthening muscles and stretching.

[0002]

[Prior art]

 FIG. 43 is a front view showing a conventional standard casual shoe, and FIG. 44 is a front view showing a conventional standard sports shoe. First, referring to FIG. 43, the conventional casual shoe is composed of an instep portion 101 and a shoe sole 102. The shoe sole 102 is composed of a heel portion 103 and a toe portion 104. The heel portion 103 is usually set to a height of about 3 cm, and the angle formed by the straight line from the lower surface of the ball joint (toe fulcrum) of the shoe wearer to the lower surface of the heel to the walking surface (hereinafter referred to as the toe angle) is It is formed to be 9 degrees. Further, the heel portion 103 occupies 31% of the entire sole 102. Further, the toe portion 104 has a curved shape, and the angle of its tip portion with respect to the walking surface is usually 13 degrees.

Next, referring to FIG. 44, a conventional sports shoe is composed of an instep 111 and a shoe sole 112. The shoe sole 112 has a substantially horizontal shape, and only the tip thereof forms an angle of 10 degrees with the walking surface.

Next, the structure of the bones of the foot will be described. FIG. 45 is a schematic diagram showing the structure of the bones of the foot. 45, the bone of the foot is composed of a plurality of small bones. That is, the bone of the foot is composed of the toe bone part 120, the metatarsal part 130, and the tarsal bone part 140. Of these, the various joints extending from the metatarsal part 130 to the tarsal part 140 are fixed by ligaments and muscles and hardly bend. Therefore, it is the ankle joint and the metatarsophalangeal joint (the joint at the base of the toe bone portion 120, which is between the five metatarsal bones and the proximal phalange bone that is in contact with the ankle joint) that bends among the joints of the foot during walking. Joint) and the joint of the toe bone part 120. Since the kicking of the foot is performed while bending the metatarsophalangeal joint and moving the weight to the toe bone part 120, a shoe with a bent sole, which corresponds to the metatarsophalangeal joint, is a good shoe. Therefore, it is a good condition for shoes that the ball joint of the shoe (where it serves as a fulcrum of flexion when standing on the toes) and the part of the metatarsophalangeal joint of a human foot exactly match.

46 to 48 are schematic diagrams for explaining the movable range of the ankle joint (ankle). Referring to FIGS. 46 to 48, the movement of the ankle joint is complicated, but the movable range of plantar flexion in which the foot is bent toward the lower leg and dorsiflexion in which the foot is bent toward the sole of the foot are important. It This range of movement shows 0 to 20 degrees of dorsiflexion and 0 to 40 degrees of plantar flexion with the knee flexed, but the last 10 degrees have large individual differences.

Next, the center of gravity of the body will be described. FIG. 49 is a schematic diagram for explaining the position of the center of gravity of the body. Referring to FIG. 49, the center of gravity of the body generally passes through the center of gravity of the hip joint, passes through the front surface of the knee joint, and passes through the center of the foot, that is, about 2 cm in front of the ankle. Here, when a person takes a standing posture for a long time, the center of gravity moves toward the heel due to fatigue of antigravity muscles such as the erector spinae muscles. Along with this movement, the lumbar spine is lordotic, and the posture is changed so as to reduce the load on the antigravity muscle.

[0007]

[Problems to be solved by the device]

 However, the above-mentioned change in posture is an important cause of back pain. The heel portion 103 of the conventional casual shoe shown in FIG. 43 affects the movement of the center of gravity toward the heel. That is, in the conventional casual shoe shown in FIG. 43, since the heel portion 103 is located at a higher position than the toe portion 104, the inclination from the toe portion 104 to the heel portion 103 is moved by moving the center of gravity to the heel portion 103. Is used to control the backward movement. As described above, in the conventional casual shoes shown in FIG. 43, the center of gravity moves backward when the user stands in the standing position for a long time, which causes back pain.

Further, in the conventional sports shoe shown in FIG. 44, stretching of the triceps surae (calf) and strength training are not considered at all, and it is difficult to obtain the effect of stretching and strength strengthening. Met.

Further, in the conventional casual shoes shown in FIG. 43 and the conventional sports shoes shown in FIG. 44, when kicking out during walking, the kicking leg side has a small ground contact area on the sole of the kicking leg, so There was the inconvenience that the output became weak. As a result, the center of gravity did not move smoothly when walking, and the knee joint was bent. Such a motion gives an impact equivalent to about four times the weight of the knee joint, and as a result, the burden on the knee is increased, and the pain and the deformation of the knee joint are gradually caused, which is a problem.

Further, it is generally known that the greatest impact is exerted when the heel of the swing-out leg comes into contact with the ground and then the entire sole of the foot comes into contact with the ground during walking. At this time, in the conventional casual shoe shown in FIG. 43, since the heel portion 103 is located higher than the toe portion 104, the force of slipping forward in the shoe acts at the moment the shoe sole reaches the floor. It causes inconvenience. As a result, there is a problem in that the knee of the swing-out leg sags and bends, which further exerts a great force on the knee.

The present invention has been made to solve the above problems, and an object of the inventions as set forth in claims 1 and 2 is to generate back pain even when the user stands in a standing position for a long time. It is an object of the present invention to provide athletic shoes that can effectively prevent the above-mentioned effects, can obtain the effects of stretching the calf and strengthening the muscle strength, and can improve the stability during walking.

[0012]

[Means for Solving the Problems]

 The athletic shoe according to a first aspect of the present invention includes an inner bottom portion formed so as to be in close contact with a human foot, and an outer bottom portion formed so as to be able to come into contact with a walking surface. The outer bottom portion holds a toe portion of a human foot and has a first bottom surface having a first bottom surface capable of contacting a walking surface, and an outer bottom portion holds a heel portion of a human foot and forms a predetermined angle with the first bottom surface. And a rear bottom portion having a second bottom surface capable of contacting the walking surface. When the first bottom surface contacts the walking surface, the straight line connecting the lower surface of the toe fulcrum of the human foot and the lower surface of the heel forms an angle of 10 degrees or more and 15 degrees or less with the walking surface. And a front bottom portion are formed. Further, the front bottom part and the rear bottom part are formed so that the first bottom surface forms an angle of 20 degrees or more and 25 degrees or less with respect to the walking surface when at least a part of the second bottom surface contacts the walking surface. It is being touched. Furthermore, the front bottom part is formed so as to include a region through which a vertical line including the center of gravity of the body passes. The athletic shoe according to a second aspect is formed such that the second bottom surface included in the rear bottom portion of the first aspect has an arch shape.

The athletic shoe according to a third aspect is formed such that the second bottom surface according to the first aspect has a plurality of arch portions.

In the athletic shoe according to the fourth aspect, a fulcrum region having a third bottom surface is formed between the front bottom portion and the rear bottom portion.

In the sports shoe according to the fifth aspect, a fulcrum cut at an inclination of 10 ° or more and 15 ° or less with respect to a direction perpendicular to the walking direction is formed at the boundary between the front sole and the rear sole.

In the sports shoe according to claim 6, a fulcrum is formed between the front sole and the rear sole, and the fulcrum is located at a position of 30% or more and 40% or less of the entire length of the sports shoe from the rear end of the rear sole. Is formed in.

[0017]

[Action]

 In the athletic shoe according to claim 1, when the first bottom surface of the front sole contacts the walking surface, the straight line connecting the lower surface of the toe fulcrum of the human foot and the lower surface of the heel is 10 degrees or more and 15 degrees or less with respect to the walking surface. The inner bottom part and the front bottom part are formed so as to form an angle of 10 degrees. The angle of 10 degrees or more and 15 degrees or less is optimal for the muscles around the joint to have the same tension and to fix the movement of the joint. Since it is an angle, the stability of the standing position can be obtained. In addition, even when the angle of the sole on the kicking side becomes about 15 degrees with respect to the walking surface at the time of kicking out during walking, the kicking leg is grounded more than before due to the inclination of 10 degrees or more and 15 degrees or less. The area is increased, stability of kicking is obtained, and muscle strength is efficiently exerted. Further, the front bottom portion and the rear bottom portion are formed so that the first bottom surface forms an angle of 20 degrees or more and 25 degrees or less with respect to the walking surface when at least a part of the second bottom surface contacts the walking surface. Therefore, if you wear these sports shoes and bring your heels into contact with the walking surface, you can obtain a dorsiflexion angle of the ankle of about 7 to 10 degrees. This enables stretching exercises for the triceps surae (calf). Also, when an angle of 20 degrees or more and 25 degrees or less with respect to the above-mentioned first bottom surface with respect to the walking surface is taken, muscle tension is induced in the front of the body and the lordosis of the lumbar spine is corrected. It This eliminates an important factor in low back pain.

In the sports shoe according to the second aspect, since the second bottom surface included in the rear sole has an arch shape, when the swing leg comes into contact with the ground during walking, the heel portion of the swing leg is applied. The impact is dispersed and lateral rolls are prevented.

In the sports shoe according to claim 3, since the second bottom surface has a plurality of arch portions, the area between the adjacent arches is smaller than that in the case where one large arch portion is formed as a whole. Only when the heel contacts the ground, the contact area increases. As a result, shock absorption capacity and stability are further enhanced.

Further, in the athletic shoe according to the fourth aspect, since the fulcrum area having the third bottom surface is formed between the front sole and the rear sole, the fulcrum area enhances the rolling action. , The stability of the stepping is enhanced with the sole of the foot horizontal, and the shock absorption is improved.

In the sports shoe according to the fifth aspect, since the fulcrum that is cut at an inclination of 10 ° or more and 15 ° or less with respect to the direction perpendicular to the walking direction is formed at the boundary between the front sole and the rear sole, The leg tilting movement (moving the center of gravity from the outside of the leg to the inside of the ground) is performed smoothly. This allows the leg joints to move smoothly.

In the athletic shoe according to the sixth aspect, the fulcrum located between the front sole and the rear sole is formed at a position of 30% or more and 40% or less of the entire length of the athletic shoe from the rear end of the rear sole. The center of gravity line of an athletic shoe wearer when the athletic shoe wearer takes a toe-standing position is included in the area of the front bottom. As a result, the stability of the standing position can be obtained even if the heel is not grounded.

[0023]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 are front views showing sports shoes according to an embodiment of the present invention. First, referring to FIGS. 1 and 2, the athletic shoe of the present invention is composed of an instep portion 1 and a shoe sole portion 2. The shoe sole 2 is formed so that when the surface of the shoe sole 2 comes into contact with the walking surface, the straight line from the lower surface of the toe fulcrum of the wearer of the sports shoe to the lower surface of the heel has an inclination (toe angle) of 10 to 15 degrees with respect to the walking surface. The area of the toe portion 4 occupies 65% of the entire sole portion 2. The heel portion 3 occupies 35% of the shoe sole portion 2 and is cut in an arch shape. Then, as shown in FIG. 3, the surface of the toe part 4 has an inclination (heel angle) of 20 to 25 degrees with respect to the walking surface in a state where the heel portion 3 and the fulcrum 5 are in contact with the walking surface. Is formed. Accordingly, when the wearer of the athletic shoe takes the posture in which the heel portion 3 is in contact with the ground, the ankle joint can be dorsiflexed by 7 to 10 degrees. As a result, the triceps surae (calf) and the like can be appropriately stretched.

In the state as shown in FIG. 1, the position of the center of gravity of the wearer of the athletic shoe passes through the position 52% from the toe. That is, when the wearer of the athletic shoe takes the toe-up posture as shown in FIG. 1, its center of gravity line is included in the region of the toe portion 4, and therefore, even if the heel portion 3 is not grounded. Stability is obtained.

Hereinafter, the reason why the toe angle (bottom flexion angle) is limited to 10 to 15 degrees and its effect will be described in detail.

First, if the toe angle is limited to 10 to 15 degrees, the standing stability can be obtained. In other words, the joint has an optimal angle for fixing the movements of the muscles and joints in the middle position, in which the tensions of the muscles around the joint are equal. In the ankle joint, the plantar flexion angle is 10 to 15 degrees as the intermediate position. Therefore, the standing stability can be obtained by setting the toe angle to 10 to 15 degrees. FIG. 4 shows a center-of-gravity sway distance (A), a center-of-gravity sway area (B), and a center-of-gravity position (C) when the toe angle of the running shoe of this embodiment shown in FIGS. 1 to 3 is changed. It is a correlation diagram. With reference to FIGS. 4 (A) and (B), both the swaying distance and the swaying area of the center of gravity are small and stable in the range of the toe angle of 10 degrees to 15 degrees. You can see that it grows and becomes unstable. Further, referring to FIG. 4C, it can be seen that the center of gravity is also in the center of the foot (52%) in the range of 10 degrees to 15 degrees.

5 to 10 are barycentric diagrams when the toe angle is changed from 5 degrees to 20 degrees, respectively. 5 to 10, it can be seen that the center of gravity is most stable when the toe angles are 10 degrees and 15. When the toe angle is 10 to 15 degrees, the heel part 3 does not come into contact with the walking surface (see Fig. 1), and the toe joint is in a light state, and the metatarsophalangeal joint is stimulated. This makes it possible to strengthen the anti-gravity muscle represented by the triceps surae (calf) involved in the upright posture. In addition, since the toes are stimulated by standing on the toes, the function of gripping the ground is enhanced, and the supporting force of the body can be improved.

Secondly, by setting the toe angle to 10 degrees to 15 degrees, the stability of the kick-out leg during walking can be obtained. In other words, in order to swing the swing leg forward while walking, it is important that the hind legs (kicking legs) are firmly supported and stable. 11 and 12 are schematic views for explaining extension of the hip joint. With reference to FIGS. 11 and 12, when the anterior rotation of the pelvis is limited, the extension range of motion of the hip joint is 15 degrees. At this time, if the ankle joint is a right angle, the angle between the floor and the sole is 15 degrees. This is a state in which kicking is performed, which is equivalent to kicking out leg during walking. In the athletic shoe of this embodiment, the toe angle is 10 to 15 degrees when performing this kick, and 65% of the entire heel portion is in contact with the ground. Therefore, it is possible to stabilize the standing support. As a result, the knee of the swing leg can be stretched with peace of mind, and at the same time, the knees of the hind legs can be delayed in the time of flexion, so that the force of the kick leg can be increased and the center of gravity can be smoothly moved. FIG. 13 is a comparison diagram when the conventional casual shoes shown in FIG. 43 and the sports shoes of this embodiment are worn and walking is performed. It can be understood from FIG. 13 that the ground contact area of the hind legs in the operations 1 to 3 is larger in the casual shoes (exercise shoes) of this embodiment than in the conventional casual shoes. Also, focusing on the left foot in movements 3 to 5, in the conventional casual shoes, the knee joint was flexed because the center of gravity could not be moved smoothly because the kick was weak, and this was stable in this example. Since the kick output can be obtained, the center of gravity can be smoothly moved, and the bending of the knee joint can be reduced.

Thirdly, by setting the toe angle to 10 degrees to 15 degrees, it is possible to efficiently exert the muscular strength. FIG. 14 shows the muscle force that can be exerted by the triceps surae (calf) by changing the angle of the ankle joint. The strongest point is in the knee joint extension position, where the ankle joint has a plantar flexion angle of 10 degrees. Moreover, it can be understood from FIG. 14 that the muscle strength exerted when the knee flexes decreases. Therefore, it is only when the knees are extended and the plantar flexion angle is about 10 degrees that the hind legs can exert a stronger kicking force when walking. Here, as described with reference to FIGS. 11 and 12, the extension of the hip joint is 15 degrees, which corresponds to the kicking leg in walking and kicking is performed. This angle is the same in both the conventional and the present embodiment. However, in the conventional casual shoes and sports shoes shown in FIGS. 43 and 44, it is not possible to obtain a sufficient ground contact area in the state of performing this kick, whereas in the present embodiment shown in FIGS. In the example sports shoes, a sufficient ground contact area (65% of the total sole 2) can be obtained. As a result, muscle strength is efficiently exerted during kicking. Further, when performing a kick during the kicking out period during walking, the conventional shoes shown in FIGS. 43 and 44 tend to exert a force for bending the knee. FIG. 15 and FIG. 16 are schematic diagrams for explaining the force of bending the knee that acts when the kicking leg is kicked. 15 and 16, it can be seen that the smaller the ground contact area of the toe, the easier the knee bending force acts. Also in this respect, in the sports shoes of this embodiment shown in FIGS. 1 to 3, a sufficient ground contact area (65%) of the toe portion 4 can be obtained, the bending force of the knee can be reduced, and the kick can be reduced. Occasionally, muscle strength is efficiently exerted.

Next, the reason why the heel angle (dorsiflexion angle) is limited to 20 to 25 degrees and the effect thereof in the sports shoe of this embodiment shown in FIG. 3 will be described.

First, standing stability can be obtained by setting the heel angle to 20 to 25 degrees. In order to prove this, the following measurement was performed. FIG. 17 is a correlation diagram showing a center-of-gravity sway distance (A), a center-of-gravity sway area (B), and a center-of-gravity position (C) when the heel angle is changed. With reference to FIG. 17, it can be seen that the center-of-gravity sway distance and the area of sway of the center-of-gravity are small in the range of the heel angle of 20 ° to 25 °, and the sway increases when the range deviates from this range. The center of gravity is 32% to 36% when the heel angle is in the range of 20 to 25 degrees, but is 30% or less outside of this range and becomes unstable. Also, it can be seen that when the heel angle is 30 degrees, the center of gravity recedes to a position of 26% and becomes very unstable. 18 to 23 are barycentric diagrams when the heel angle is changed from 15 degrees to 30 degrees, respectively. 18 to 23, it can be clearly seen that the center of gravity is stable in the heel angle range of 20 degrees and 25 degrees. Thus, the stability of the standing position is obtained by setting the heel angle to 20 to 25 degrees.

Secondly, by setting the heel angle to 20 to 25 degrees, it is possible to obtain a stretching effect on the triceps surae (calf) and the like. In other words, the dorsiflexion range of motion of the ankle joint can be measured by moving the knee flexor in the sitting position and removing the tension in the biarticular muscle (gastrocnemius muscle) by moving (the measurer applies force by hand). It has been decided. In the measurement of this condition, the range of motion of the dorsiflexion joint indicates a range of 0 to 20 degrees. However, when the knee is extended, the tension of the gastrocnemius muscle increases, and it decreases to 14 degrees. Furthermore, if you do dorsiflexion automatically (moving it by your own muscles), the range of motion will decrease to 10 degrees due to the resistance of the gastrocnemius and soleus muscles even when the knees are flexed. Furthermore, when the knee is extended, it will be about 6 degrees when measured automatically. Therefore, as shown in FIG. 3, when the heel portion 3 of the exercise shoe of this embodiment stands in contact with the walking surface, the dorsiflexion angle of the ankle becomes about 7 degrees to 10 degrees. Stretching of the triceps (calf) and hamstring muscles (the muscles behind the thighs).

Thirdly, the lumbar spine can be rectified by setting the heel angle to 20 to 25 degrees. FIG. 24 is a schematic diagram for explaining lordosis of the lumbar spine. Referring to FIG. 24, when a person takes a standing posture for a long time, the center of gravity moves toward the heel due to fatigue of the anti-gravity muscles such as the erection muscles of the spine, causing the lumbar vertebra to lordotic and anti-gravity. Change your posture to reduce the strain on your muscles. However, this lumbar lordotic posture is an important cause of back pain. Therefore, in the sports shoe of the present embodiment, as shown in FIG. 3, this is solved by forming the heel angle to be 20 to 25 degrees with the heel portion 3 grounded. FIG. 25 is a schematic diagram for explaining lordosis correction when the sports shoe of this embodiment is worn. Referring to FIG. 25, if the athletic shoes of this embodiment are worn in a standing posture as shown in FIG. 3, tension of the tibialis anterior muscle, the quadriceps femoris muscles, and the abdominal muscles is increased in front of the body. The provocation can correct lumbar lordosis. As a result, it is possible to remove an important factor of low back pain.

Fourthly, by setting the heel angle to 20 to 25 degrees, stability of the swing leg can be obtained during walking. That is, as described above, it is generally known that the greatest impact is exerted when the swinging leg during walking touches the ground and then the entire sole touches the ground. Moreover, in the conventional casual shoe shown in FIG. 43, since the position of the heel portion 103 is higher than the position of the toe portion 104, the force of slipping forward in the shoe in the moment the shoe sole 102 reaches the floor. The knees of the working-out legs are slackened and bent, which applies a great amount of force to the knees. On the other hand, the sports shoe of this embodiment shown in FIG. 3 has the effect of mitigating the impact when the sole of the foot touches the ground. That is, it is generally known that the ankle joint angle is 0 degree, that is, 90 degrees with respect to the lower leg when the heel of the foot shaken forward reaches the ground (heel contact). At this time, the angle between the sole and the floor is about 7 degrees. As shown in FIG. 3, this angle is the angle at which the ankle joint is corrected when the arched heel 3 of the sports shoe of this embodiment is in contact with the ground. This mechanism will be described with reference to FIG. As can be seen from the operation of the conventional shoe in FIG. 13, in the related art, the grounding area of the outgoing leg is small. In addition, from this motion, in the related art, since the rotational motion with the ground contact point of the heel of the swing-out leg as a fulcrum occurs, the knee flexes during the motion. FIG. 26 and FIG. 27 are schematic diagrams for explaining the knee bending force that acts when the swinging leg touches the ground. Referring to FIGS. 26 and 27, in such a conventional shoe, the knee is likely to bend due to the rotational movement with the ground contact point of the heel as a fulcrum. On the other hand, in the sports shoe of the present embodiment, when the arched heel 3 is grounded as in the operation shown in FIG. 13, the supporting area from the heel 3 to the center of the sole is increased. And the heel angle of 20 to 25 degrees allows the indirect dorsiflexion angle of the foot to be about 7 to 10 degrees, preventing the foot from slipping forward in the shoe. It is possible to obtain the effect that the rotational movement to the knee is suppressed and the knee does not bend. As a result, as seen in the operation shown in FIG. 13, the leg extends straight and the weight can be supported by the whole sole of the foot. This way of walking is an advanced technique found in track and field races, and is the basis for walking quickly and smartly. For this reason, the force applied to the knee can be reduced, and it can be expected to prevent knee pain and knee joint deformation.

Next, in the sports shoe of this embodiment shown in FIGS. 1 to 3, a range in which the heel portion 3 is cut in an arch shape will be described. The sports shoe of this embodiment has a toe angle of 10 to 15 degrees, and within the range of this angle, as described above, the center of gravity of the shoe wearer when standing is about 52% from the tip of the toe. In the position. Therefore, if there is a fulcrum 5 behind this position, it is effective as a support surface. However, it is not so preferable that the fulcrum 5 is located on the metatarsal part 130 (see FIG. 45) because the strength of the metatarsal part 130 is weak. Furthermore, since the fulcrum 5 also plays a role of supporting the arch, it is located in the tarsal bone part composed of three wedge-shaped bones, scaphoid bones and cubic bones (see FIG. 45), which are almost in the center of the vertical arch. The fulcrum 5 is preferably located. Therefore, the fulcrum 5 is preferably located within the range of 30% to 40% from the heel. Correspondingly, in this embodiment, the fulcrum 5 is provided at a position 35% from the heel.

Next, the effect obtained by providing the fulcrum 5 at the above position will be described. First, the rolling action is obtained by providing the fulcrum 5 (see FIG. 1) at a position 35% from the heel. FIG. 28 is a conceptual diagram for explaining a shoe sole of a rocker sole devised for a person with reduced walking ability. Referring to FIG. 28, the sole of the rocker sole is a shoe sole that is appreciated when applied to a person with a stiff foot due to no impact on the knees or hips, rheumatoid arthritis, shoes of an elderly person, etc. Is less stable. The sole of the rocker sole is arranged so that its center is located at the center of the hip joint. FIG. 29 is a front view for explaining the rocker sole structure of the sports shoe of this embodiment. Referring to FIG. 29, the sports shoe of this embodiment has a shape close to an arc, and a shape close to the sole of the rocker sole shown in FIG. Therefore, the center of gravity can be moved smoothly. In addition, the stability, which is a drawback of the rocker sole, is solved by the arched heel portion 3 in the sports shoe of this embodiment.

Next, balance exercise can be performed by providing the fulcrum 5 in the region of the arch with the sports shoe of this embodiment. FIG. 30 is a schematic diagram for explaining the balance training by the K board. With the exercise shoe of this embodiment shown in FIGS. 1 to 3, the same training as the balance (proprioceptor / motor sensation) training using the K board shown in FIG. 30 is possible by standing around the fulcrum 5. become. This improves nerve and muscle communication and enhances the body's ability to balance. Such training is called function training. That is, by strengthening the muscles surrounding the joint in the middle position, which is the most natural position of the joint, it is possible to prevent the sprain of the ankle joint, which is the most common in sports disorders.

Further, by providing the fulcrum 5 (see FIG. 1) at a position 35% from the heel, it exerts a function of supporting the arch of the sole of the foot. FIG. 31 and FIG. 32 are front views for explaining a bent state in which the toe and the heel are held by both hands while being supported only by the fulcrum 5. With reference to FIGS. 31 and 32, after the weighting, the toe and the heel show a deflection of about 5 mm around the fulcrum 5 as compared with before the weighting. It can be seen that such a deflection has the function of supporting the arch of the sole of the footwear in this embodiment.

Next, the effect of the arch shape (curved shape) of the heel portion 3 of this embodiment will be described. In this embodiment, the impact can be dispersed by forming the heel portion 3 into an arch shape. FIG. 33 is a schematic diagram for explaining the mechanism of impact dispersion due to the arch structure. Referring to FIG. 33, it can be seen that, when a weight is applied to the upper center of the arch structure, the weight is laterally dispersed from both ends of the arch structure. 34 and 35 are front views showing a state before weighting and a state after weighting when one foot weight is added to the sports shoe of the first embodiment. With reference to FIGS. 34 and 35, the arch of the heel portion 3 is lowered by about 3 mm due to the weighting of one foot, whereby the impact at the heel ground contact can be moderated.

Next, with reference to FIGS. 1 to 3, the usage and effects of the sports shoes of this embodiment will be summarized.

First, when standing on the AB side of the shoe sole 2, the toe is lightly put into a toe state, and the muscles of the legs and waist are moderately tensioned to be in the correct posture.

Next, by walking or running using the AB surface of the shoe sole 2, it is possible to strengthen the muscles of the ankle and the sole (the triceps surae). In addition, climbing up a slope using the AB plane helps strengthen the muscles behind the hips and thighs (knee flexor group).

Next, standing on the BC arch of the shoe sole 2 raises the toes so that the calf muscles that tend to be stiff and the muscles behind the thighs can be stretched. Stretching these muscles is effective in softening the ankle joints and preventing sports disorders such as aging, ankle sprains and Achilles tendon rupture, and the prevention of back pain.

Further, due to the structure of the seesaw having the B line of the shoe sole as a fulcrum, it has a function of rhythmically contracting the muscles from the knees when performing an action like a seesaw when standing. This function of the muscle, called the milking action, helps return the blood of the foot to the heart. Therefore, it exerts the effect that the foot does not get tired. In addition, such a seesaw exercise also has a function of enhancing the balance ability.

Also, when standing or lightly stepping on the B line of the sole, the B line stimulates the arch and extends the muscles of the sole of the foot and improves blood circulation, and has the same effect as the so-called Aotake stepping. .

When walking from the B line of the shoe sole using the AB plane, the B line performs the function of arch support and the stepping of bamboo shoots at the same time, and since the center of gravity of the shoe is in front, the body can move smoothly.

Furthermore, walking with the BC arch, B line, and AB surface of the shoe sole absorbs the impact of the BC arch while walking, and also functions such as arch support, green bamboo stepping, and smooth weight transfer. Learn the correct way to walk.

In addition, since the stability of the kicking leg and the swinging leg is improved, it is easy to widen the stride during walking, which can strengthen the muscle strength of the lower limb muscle group and gluteus maximus.

In order to confirm the effect of the above-described sports shoe of the first embodiment, the following first experiment and second experiment were conducted.

(First Experiment) (1) Method 10 female students were divided into two groups, group A (5 persons) and group B (5 persons), and they were sent to the university or on campus for the first example. I used athletic shoes.

When wearing the athletic shoes of the first embodiment, as a precaution, ground the arched heel of the athletic shoes of the first embodiment when standing and walk while grounding from the arched heel when walking. I gave two instructions.

The measurement items for effect determination are ankle dorsiflexion range of motion and long sitting forward bending. The ankle dorsiflexion range of motion was measured in the knee extension position (with the knees extended) by passive movement (the measurer applies force by hand to move).

The measurement was performed at the beginning of the group A, after 1 week, and at the end, and at the beginning of the group B, at the end, and at 1 week after the end, the measurement was performed 3 times each.

(2) Results As for the time period in which the sports shoes of Example 1 were used by Group A, the average was about 3. In the latter half of the week, it averaged about 3 hours per day for 7 hours. The average number of steps in Group A was about 2,800 per day in the first half, and about 2,300 per day in the latter half.

On the other hand, the group B used the sports shoes of the first embodiment for about 4 hours a day on average, and the average number of steps per day was about 1600 steps. The changes in the ankle dorsiflexion range of motion under such conditions are shown in Tables 1 and 2 below.

[0057]

[Table 1]

[0058]

[Table 2]

With reference to Tables 1 and 2 above, in group A, a significant improvement was observed after 2 weeks on average in the right foot from 14 to 21 degrees and in the left foot from 12 to 20 degrees. The period of use of group B was as short as one week, but significant improvement was seen from the average of 14 degrees to 22 degrees in the right foot and from 13 degrees to 18 degrees in the left foot.

FIG. 36 is a correlation diagram showing changes in long sitting body forward bending when the group A uses the sports shoes of the first embodiment for 2 weeks, and FIG. 37 shows the group B group 1 week for the first week. It is a correlation diagram which showed the change of long sitting body forward bending when the sports shoes of an example are used. With reference to FIGS. 36 and 37, almost no change was observed in one week in both the groups A and B, but in the group A, an average of 8.3 cm to 12 after using the sports shoes of the first embodiment for 2 weeks. There was a significant improvement of 0.4 cm.

As described above, when the sports shoes of the first embodiment are used in daily life, the range of motion of the ankle dorsiflexion is improved in about one week, and the range of motion of the long sitting posture is 2%. The flexibility was improved during the week. This means that the effect of stretching the triceps surae (calf) appears in about one week, and that of the hamstring muscles appears in about two weeks. It is considered that the use of the sports shoes of the first embodiment can prevent the deterioration of flexibility due to the increase of age and can maintain and improve the function of controlling the force applied to the joint.

(Second Experiment) (1) Method 11 female students were divided into a group using the sports shoes of the first embodiment (hereinafter, a group using the Examples) and a group not using the sports shoes of the Example 50 per day. Training was carried out for ~ 60 minutes.

The measurement items for effect determination are the fifth type of long sitting body forward bending, standing long jump, vertical jump, repeated side jump, and 50 m running.

The measurement was carried out on ordinary training shoes the day before the start of training and the day after the end of training. The training period was 11 days, but on days 2 and 6 it was a holiday, so no training was conducted. As a general rule, the training was conducted simultaneously by the group using the example athletic shoes and the group not using the example athletic shoes under the direction of one instructor.

(2) Results Table 3 below shows a comparison of the measurement results before and after the training between the group using the example athletic shoes and the group not using the example athletic shoes.

[0066]

[Table 3]

Referring to Table 3 above, the group using the example athletic shoes had a long sitting posture of 6 cm for forward bending, 16 cm for standing long jump, 5 cm for vertical jump, 3 times for repeated side jump, and 0.3 for 50 m run. Improvement was seen in all items in seconds. Moreover, all items except the 50m run were statistically significant. In the non-exercise shoe group of the example, the items other than the 50 m run also improved, but they were not statistically significant.

As described above, when the sports shoes of the first embodiment were used, a significant training effect was recognized in all the items except 50 m running in a short-term training. The athletic shoe of the first embodiment is capable of not only linear running but also zigzag and meandering, and it is also possible to freely perform repeated side jumps and jumps that quickly move left and right. Therefore, it is possible to perform training with movements very close to actual sports movements. As a result, not only muscular strength but also instantaneous power training is being performed at the same time.

FIG. 38 is a front view showing athletic shoes according to a second embodiment of the present invention. Referring to FIG. 38, in the sports shoe of the second embodiment, a fulcrum portion located at a boundary area between heel portion 13 and toe portion 14 is formed by a region connecting fulcrums 15a and 15b. As a result, the rolling action can be enhanced as compared with the first embodiment shown in FIGS. In addition, the stability of the stepping (foot flat) when the sole of the foot is horizontal can be improved, and the shock absorbing power can be improved.

FIG. 39 is a front view showing athletic shoes according to a third embodiment of the present invention. Referring to FIG. 39, in the athletic shoe of the third embodiment, the heel portion 23 has two arches 23a and 23b. With this structure, the ground contact area can be increased when the heel portion 23 is in contact with the ground, and as a result, the shock absorbing capacity can be enhanced and the stability can be improved as compared with the first and second embodiments. Can be increased.

FIG. 40 is a bottom view showing a sole shape of an athletic shoe according to a fourth embodiment of the present invention. With reference to FIG. 40, in the sports shoe of the fourth embodiment, the cut shape 35 of the fulcrum B is formed so as to have an inclination of 10 to 15 degrees from a position 30% from the heel end of the shoe. Further, the cut shape 33a of the heel portion ground contact surface 33c is formed to have an inclination of 10 to 15 degrees.

Here, in walking or running, the toes are externally rotated about 10 to 15 degrees in the traveling direction. FIG. 41 is a schematic diagram showing this state. With reference to FIG. 41, the angle at which the tip of the foot is outwardly rotated about 10 to 15 degrees in the traveling direction is referred to as an angle of step. The cause of such a walking angle is that the tibial joint of the lower leg and the talar joint axis of the foot are in the external rotation position of 10 to 15 degrees, which causes the tilting movement of the foot (from the outside of the foot to the ground. It is possible to move the center of gravity to the inside, improving shock absorption and stability. FIG. 42 is a schematic diagram for explaining the swing motion during walking and running. Referring to FIG. 42, the tilting movement during walking is shown by a solid line, and the tilting movement during running is shown by a dotted line. In this way, it can be seen that the amount of motion is greater when running than when walking. In the athletic shoe of the fourth embodiment shown in FIG. 40, the cut shape 35 of the fulcrum B and the cut shape 33a of the heel contact surface 33c are formed so as to have an inclination of 10 to 15 degrees, so that the foot tilts. Exercise can be performed smoothly. As a result, it is possible to smoothly move the ankle joint.

In the first to fourth embodiments described above, each has a single shape, but the present invention is not limited to this, and an athletic shoe having a shape combining them may be used. In that case, an athletic shoe having the effect of the combined embodiment is obtained. By configuring the sports shoes of the present invention according to the purpose in this way, it is possible to improve the shock absorption and stability in the hard movement such as asphalt on a hard road surface, and the movement of almost all sports events. And shock absorption becomes possible.

[0074]

[Effect of device]

 According to the athletic shoe of claim 1, when the first bottom surface which holds the toe of a human foot and can contact the walking surface contacts the walking surface, the lower surface of the toe fulcrum of the human foot and the lower surface of the heel are separated. By forming the inner bottom part and the front bottom part so that the connecting straight line makes an angle of 10 degrees or more and 15 degrees or less with respect to the walking surface, the first bottom surface is brought into contact with the toes to stand upright. , It is possible to perform calf strength training and obtain a posture improving effect. In addition, the first bottom surface walks when at least a part of the second bottom surface that holds the heel of a human foot and forms a predetermined angle with the first bottom surface and that can contact the walking surface contacts the walking surface. By forming the front bottom portion having the first bottom surface and the rear bottom portion having the second bottom surface so as to form an angle of 20 degrees or more and 25 degrees or less with respect to the surface, the second bottom surface becomes the walking surface. You can stretch the calf by standing in contact. Furthermore, by using the fulcrum part where the first bottom surface and the second bottom surface intersect, standing and lightly stepping on can be used to perform so-called bamboo stepping effect and balance sensation training. Further, when the first bottom surface and the second bottom surface are alternately used like a seesaw, the standing blood has a so-called milking action effect of returning blood of the foot to the heart.

In the athletic shoe according to the second aspect, by forming the second bottom surface in an arch shape, the impact acting on the sole of the foot can be dispersed in addition to the effect of the first aspect.

In the sports shoe according to the third aspect, by configuring the second bottom surface to have a plurality of arch portions, compared to the case where the second bottom surface is formed by one large arch portion. As a result, the contact area can be increased when the rear bottom contacts the ground by the area of the area between the adjacent arch portions, and as a result, the shock absorbing capacity and stability can be improved.

In the sports shoe according to the fourth aspect, by forming the fulcrum region having the third bottom surface between the front sole and the rear sole, the rolling action can be enhanced by the third bottom. Further, the third bottom surface can enhance the stability of stepping on the foot in a horizontal state, and as a result, the impact absorbing power can be improved.

In the sports shoe according to the fifth aspect, by forming a fulcrum that is cut at an inclination of 10 ° or more and 15 ° or less with respect to the direction perpendicular to the walking direction at the boundary between the front sole and the rear sole. As a result, the swinging motion of the legs can be smoothly performed, and as a result, the leg joints can be smoothly moved.

In the sports shoe according to the sixth aspect, the fulcrum located between the front sole and the rear sole is formed at a position of 30% or more and 40% or less of the entire length of the sports shoe from the rear end of the rear sole. When the athletic shoe wearer stands in a toe position, the center of gravity line of the athletic shoe wearer is included in the area of the front bottom, so that the standing stability can be obtained even if the rear bottom is not grounded. it can.

[Brief description of drawings]

FIG. 1 is a front view showing a toe standing state of an athletic shoe according to a first embodiment of the present invention.

FIG. 2 is a front view of the sports shoe according to the first embodiment of the present invention with the toes slightly raised.

FIG. 3 is a front view showing the heel standing state of the sports shoe according to the first embodiment of the present invention.

FIG. 4 is a correlation diagram showing a center-of-gravity sway distance (A), a center-of-gravity sway area (B), and a center-of-gravity position (C) when a human toe angle is changed.

FIG. 5 is a center of gravity diagram when the toe angle is 5 degrees.

FIG. 6 is a center of gravity diagram when the toe angle is 7 degrees.

FIG. 7 is a center of gravity diagram when the toe angle is 10 degrees.

FIG. 8 is a center of gravity diagram when the toe angle is 15 degrees.

FIG. 9 is a center of gravity diagram when the toe angle is 17 degrees.

FIG. 10 is a center of gravity diagram when the toe angle is 20 degrees.

FIG. 11 is a first schematic diagram for explaining the extension of the hip joint.

FIG. 12 is a second schematic diagram for explaining extension of the hip joint.

FIG. 13 is a comparative diagram showing the states of the ankle joint and the knee joint during walking when the conventional shoe and the shoe of the first embodiment are used.

FIG. 14 is a correlation diagram showing the relationship between the angle of the ankle and the moment applied to the ankle (muscle force exerted by the calf).

FIG. 15 is a first schematic diagram for explaining a knee bending force that acts during a kicking period during walking.

FIG. 16 is a second schematic diagram for explaining the force for bending the knee that acts during the kicking out period during walking.

FIG. 17 is a correlation diagram showing a center-of-gravity sway distance (A), a center-of-gravity sway area (B), and a center-of-gravity position (C) when a heel angle is changed.

FIG. 18 is a centroid diagram when the heel angle is 15 degrees.

FIG. 19 is a centroid diagram when the heel angle is 17 degrees.

FIG. 20 is a centroid diagram when the heel angle is 20 degrees.

FIG. 21 is a centroid diagram when the heel angle is 25 degrees.

FIG. 22 is a centroid diagram when the heel angle is 27 degrees.

FIG. 23 is a centroid diagram when the heel angle is 30 degrees.

FIG. 24 is a schematic diagram for explaining lordosis of the lumbar spine in a standing posture for a long time.

FIG. 25 is a schematic diagram for explaining lordosis correction when the sports shoes of this embodiment are used in a standing posture for a long time.

[Fig. 26] Fig. 26 is a first schematic diagram for explaining a knee bending force that acts when the heel touches the ground during walking.

FIG. 27 is a second schematic diagram for explaining a knee bending force that acts when the heel touches the ground during walking.

FIG. 28 is a conceptual diagram for explaining a conventional shoe sole of a generally known rocker sole.

FIG. 29 is a front view for explaining the rocker sole structure of the sports shoe of the first embodiment.

FIG. 30 is a schematic diagram for explaining balance training by the conventional K board.

FIG. 31 is a first front view for explaining the bending of the fulcrum of the sports shoe of the first embodiment.

FIG. 32 is a second front view for explaining the bending of the fulcrum of the sports shoe of the first embodiment.

FIG. 33 is a schematic diagram for explaining the dispersion of impact due to the arch structure of the sports shoe of the first embodiment.

FIG. 34 is a first front view for explaining the bent state of the arch structure of the sports shoe of the first embodiment.

FIG. 35 is a second front view for explaining the bending state of the arch structure of the sports shoe of the first embodiment.

[Fig. 36] Fig. 36 is a correlation diagram showing changes in the long sitting body forward flexion value due to the use of the sports shoes of this example for 2 weeks in Group A in the first experiment.

[Fig. 37] Fig. 37 is a correlation diagram showing changes in the long sitting body forward flexion value of the group B in the first experiment during one week when using the sports shoes of this example.

FIG. 38 is a front view showing athletic shoes according to a second embodiment of the present invention.

FIG. 39 is a front view showing athletic shoes according to a third embodiment of the present invention.

FIG. 40 is a bottom view showing the shape of the sole of the sports shoe according to the fourth embodiment of the present invention.

FIG. 41 is a schematic diagram for explaining a step angle of a foot tip in the traveling direction.

[Fig. 42] Fig. 42 is a schematic diagram for explaining a tilting motion of a foot.

[Fig. 43] Conventional general casual shoes (leather shoes)
It is the front view which showed.

FIG. 44 is a front view showing a conventional general sports shoe.

FIG. 45 is a schematic diagram for explaining the structure of a foot bone.

FIG. 46 is a first schematic diagram for explaining movement of a human foot.

FIG. 47 is a second schematic diagram for explaining the movement of a human foot.

FIG. 48 is a third schematic diagram for explaining the movement of a human foot.

FIG. 49 is a schematic diagram for explaining the position of the center of gravity line of a human.

[Explanation of symbols]

 1: Instep part 2: Sole part 3: Heel part 4: Toe part 5: Support point In addition, the same code | symbol shows the same or corresponding part in each figure.

Claims (6)

[Scope of utility model registration request] 1. An inner bottom portion formed so that a human foot is in close contact therewith, and an outer bottom portion formed so as to come into contact with a walking surface, wherein the outer bottom portion holds a toe portion of a human foot. A second bottom part having a first bottom part capable of contacting the walking surface and a heel part of a human foot, forming a predetermined angle with the first bottom part and contacting the walking surface. A rear bottom portion having a bottom surface, and when the first bottom surface contacts the walking surface, a straight line connecting the lower surface of the toe fulcrum of the human foot and the lower surface of the heel is 10 degrees or more and 15 degrees with respect to the walking surface. The inner bottom portion and the front bottom portion are formed so as to form the following angles, and when at least a part of the second bottom surface contacts the walking surface, the first bottom surface is the walking surface. The front bottom portion and the rear bottom portion are formed so as to form an angle of 20 degrees or more and 25 degrees or less. The athletic shoe, wherein the front bottom portion is formed so as to include a region through which a vertical line including the center of gravity of the body passes. 2. The sports shoe according to claim 1, wherein the second bottom surface has an arch shape. 3. The sports shoe according to claim 1, wherein the second bottom surface has a plurality of arch portions. 4. A fulcrum region having a third bottom surface is formed between the front bottom portion and the rear bottom portion.
Athletic shoes described in. 5. The boundary between the front bottom portion and the rear bottom portion,
The athletic shoe according to claim 1, wherein a fulcrum cut with an inclination of 10 ° or more and 15 ° or less with respect to a direction perpendicular to the walking direction is formed. 6. A fulcrum is formed between the front sole and the rear sole, and the fulcrum is located at a position of 30% or more and 40% or less of a total length of the sports shoe from a rear end of the rear sole. The athletic shoe according to claim 1, wherein the athletic shoe is formed.