JP7244048B2 - Insole - Google Patents

Description

TECHNICAL FIELD The present invention relates to an insole that is laid on the inner bottom surface of shoes such as walking shoes.

In order to reduce the fatigue of the wearer's feet and lower back, it is common practice to install a cushioned insole (insole) on the inner bottom surface of the shoe. Further, in order to further reduce fatigue of the wearer's legs and lower back, a convex arch support that supports the arch of the foot bone may be formed on the contact surface of the insole (see Patent Document 1).

Japanese Unexamined Patent Application Publication No. 2017-23706

In recent years, the number of people who walk for the purpose of promoting health is increasing regardless of age or sex. On the other hand, if the walking posture is bad during walking, the legs may drift outward in the width direction, the walking efficiency may decrease, the wearer may get tired easily, and health may be adversely affected. Therefore, the development of an insole that improves walking efficiency, reduces fatigue, and enables comfortable walking is desired.

Accordingly, an object of the present invention is to provide an insole capable of sufficiently suppressing the foot from flowing outward in the width direction during walking.

The insole according to the invention is formed with a convex medial longitudinal arch support (24), a convex lateral longitudinal arch support (26) and a convex transverse arch support (28) to keep the three arches on the surface. , an insole having an insole body (14) with a heel cup (30) formed on the periphery of a heel corresponding region (10a),
On the back surface of the insole main body (14),
In the vicinity of the calcaneus projection, an oval hole is formed to the extent that it includes the calcaneus projection, and the area from the heel corresponding region (10a) to the arch corresponding region (10b) is crimped and has high hardness. comprising a reinforcing shell (20),
The heel-corresponding region (10a) on the surface of the insole main body (14) is
The thickness gradually increases from the vicinity of the inner end that is inner than the center of the oblong hole in the width direction to the outer edge in the width direction,
Furthermore, a reinforcing core material (32) is provided inside the insole main body (14),
The reinforcing core material (32) is
From the vicinity of the boundary between the heel-corresponding region (10a) and the arch-corresponding region (10b), through the region including the fifth and fourth metatarsal bones, from the head of the fifth metatarsal bone to The first predetermined width passes through a region immediately behind the head of the second metatarsal bone and covers the region from the head of the first metatarsal bone to the base of the first distal phalanx. It is characterized by having a band-like shape with a greater width .

The insole body (14) is formed by joining an upper insole body (16) made of urethane worm and a lower insole body (18) made of urethane worm and joined to the back surface of the upper insole body (16). is formed by
Further, the reinforcing core material (32) is provided between the upper insole body (16) and the lower insole body (18),
Further, it is characterized in that a surface layer member is joined to the surface of the upper insole body (16) .

Further, the core material (32) is
It is characterized by being composed of a woven fabric or non-woven fabric impregnated with a synthetic resin, or composed only of a synthetic resin .

ADVANTAGE OF THE INVENTION According to this invention, a wearer's walking efficiency can be improved, a comfortable walking can be performed, and a wearer's health promotion can be aimed at.

FIG. 1 is a diagram showing a state in which a walking insole according to an embodiment of the present invention is installed on the inner bottom surface of a shoe. FIG. 2 is a diagram showing the relationship between a walking insole according to an embodiment of the present invention and the foot including the ankle bone. FIG. 3 is a plan view of the insole for walking according to the embodiment of the present invention (viewed from the side of the foot joint). FIG. 4 is a side view of a walking insole according to an embodiment of the invention; FIG. 5 is a bottom view of the insole for walking according to the embodiment of the present invention (viewed from the ground surface side). FIG. 6(a) is a rear view (viewed from the rear side) of the walking insole according to the embodiment of the present invention. FIG. 6(b) is a cut end view along the line VI-VI in FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 3. FIG. FIG. 8 is a diagram showing the load center trajectory during normal walking and the load center trajectory during high-speed walking.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 8. FIG.

In the specification and claims of the present application, the term "longitudinal direction" refers to the lengthwise direction of the insole or the foot, and is synonymous with the front-rear direction. "Longitudinal one side" refers to the forward direction or the front side. "The other lengthwise side" means the rearward direction or the rear side. "Width direction" means the width direction of the insole or foot. "Width direction inner side" refers to the inner side of the insole or the width direction of the foot. "Width direction outside" means the outside in the width direction of the insole or foot. The “inner portion” refers to a portion located in the inner region in the width direction. The “outer portion” refers to a portion located in the widthwise outer region. The "surface" refers to the surface of the insole on the side of the insole. The “back surface” refers to the surface of the insole on the side of the contact surface.

In the drawings, "LD" is the length direction, "LDf" is one side in the length direction (front side), "LDr" is the other side in the length direction (rear side), "WD" is the width direction, and "WDi" is the width. Directionally inward, "WDo" refers to widthwise outward, respectively.

As shown in FIGS. 1 and 2, a walking insole 10 according to an embodiment of the present invention is an insole detachably laid on the inner bottom surface of a shoe 12 such as walking shoes, and is comfortable. It was developed for walking. Note that the walking insole 10 may be installed integrally with the inner bottom surface of the shoe 12 .

The walking insole 10 includes a heel corresponding region 10a corresponding to the heel portion Fa of the foot F, an arch corresponding region 10b corresponding to the arch portion Fb of the foot F, and a toe corresponding region 10c corresponding to the toe portion Fc of the foot F. and The boundary between the heel corresponding region 10a and the arch corresponding region 10b includes the front portion of the heel corresponding region 10a and the rear portion of the arch corresponding region 10b. The boundary between the arch-corresponding region 10b and the toe-corresponding region 10c includes the front portion of the arch-corresponding region 10b and the rear-side portion of the toe corresponding region 10c. The foot contact surface of the insole 10 for walking consists of the contact surface of the heel corresponding area 10a, the contact surface of the arch corresponding area 10b, and the contact surface of the toe corresponding area 10c. The ground contact surface of the insole 10 for walking consists of a ground contact surface of the heel corresponding area 10a, a contact surface of the arch corresponding area 10b, and a contact surface of the toe corresponding area 10c.

As shown in FIGS. 2-7, the walking insole 10 includes a cushioned insole body 14 . The insole body 14 has a two-layer structure consisting of an upper insole body 16 and a lower insole body 18 joined to the back surface of the upper insole body 16 . The insole body 14 (upper insole body 16 and lower insole body 18) is made of urethane foam. A concave portion 18d is formed in a region extending from the heel corresponding region 10a to the arch corresponding region 10b on the back surface of the lower insole main body 18. As shown in FIG. At the center of the heel corresponding region 10a on the bottom surface of the recess 18d of the lower insole body 18, an oval projection 18s for absorbing the load acting on the calcaneus Ba of the footbone B is formed. The insole main body 14 may have a three-layer structure, a four-layer structure, or the like instead of the two-layer structure. The insole main body 14 may be made of thermoplastic synthetic resin foam such as ethylene-vinyl acetate copolymer (EVA) or rubber material such as butadiene rubber instead of urethane foam.

A reinforcing shell 20 for supporting the heel portion Fa to the arch portion Fb of the foot F is provided in alignment with the concave portion 18d of the lower insole body 18. As shown in FIG. The reinforcing shell 20 has a two-layer structure in which a nonwoven fabric impregnated with a synthetic resin and a thermoplastic resin sheet such as ethylene-vinyl acetate copolymer (EVA) are bonded together. The rigidity (bending rigidity) of the reinforcing shell 20 is set higher than that of the insole main body 14 . An oval fitting hole 20h for fitting the projection 18s of the lower insole body 18 is formed in the central portion of the heel-corresponding region 10a of the reinforcing shell 20. As shown in FIG. The reinforcing shell 20 may have a one-layer structure made of synthetic resin instead of the two-layer structure. The reinforcing shell 20 may be omitted from the construction of the walking insole 10 . In this case, the concave portion 18d and the convex portion 18s are omitted from the structure of the lower insole main body 18. As shown in FIG.

A surface layer 22 that comes into direct contact with the foot F is joined to the surface of the upper insole body 16 . The surface layer 22 is made of polyester, and the thickness of the surface layer 22 is set to 0.5 to 1.0 mm, for example. Instead of being made of polyester, the surface layer 22 may be made of nylon, synthetic fiber, artificial leather, synthetic leather, or natural leather.

As shown in FIGS. 2 and 3, a convex medial longitudinal arch support 24 for supporting the medial longitudinal arch Bb of the foot bone B extends from the heel-corresponding region 10a to the medial portion of the foot contact surface of the walking insole 10. It is formed over the front portion of the arch-corresponding region 10b. Further, on the outer side of the foot contact surface of the walking insole 10, a convex outer longitudinal arch support 26 for supporting the outer longitudinal arch Bc of the foot bone B extends from the heel corresponding region 10a to the rear side of the arch corresponding region 10b. is formed over The longitudinal dimension of the lateral longitudinal arch support 26 is shorter than the longitudinal dimension of the medial longitudinal arch support 24 . Further, a convex lateral arch support 28 for supporting the lateral arch Bd of the foot bone B is formed in the central portion of the foot contact surface of the arch-corresponding region 10b.

As shown in FIG. 3, a U-shaped heel cup 30 for stably holding the heel portion Fa of the foot F is formed on the peripheral edge of the foot contact surface of the heel corresponding area 10a. In addition, the inner end (the inner end in the width direction) of the heel cup 30 is smoothly connected to the rear end of the inner longitudinal arch support 24 . The outer edge (outer edge in the width direction) of the heel cup 30 is smoothly connected to the rear edge of the outer longitudinal arch support 26 .

As shown in FIGS. 6B and 8, in order to guide walking inward in the width direction so that the load center during walking follows the ideal load center trajectory (foot pressure center trajectory) CT, the heel-corresponding region 10a is gradually increased from the center in the width direction toward the outside in the width direction. In other words, the thickness of the insole main body 14 (lower insole main body 18) gradually increases from the center in the width direction toward the outside in the width direction. The ideal load center trajectory CT is a trajectory that draws an arc from the heel Fa of the foot F to the hallux Fd.

As shown in FIGS. 2 to 4, 7, and 8, the upper insole main body 16 and the upper insole main body 16 are used to guide walking inward in the width direction so that the load center during walking follows the ideal load center trajectory CT. A reinforcing core material 32 is provided between the lower insole bodies 18 . In other words, the reinforcing core material 32 is provided inside the insole main body 14 . The reinforcing core material 32 is made of woven fabric or non-woven fabric impregnated with synthetic resin, and the thickness of the reinforcing core material 32 is set to, for example, 1.0 mm or less. The rigidity (bending rigidity) of the reinforcing core material 32 is set higher than that of the insole main body 14 . Specifically, the bending rigidity of the reinforcing core member 32 in the length direction is 31 N·cm, and the bending rigidity of the reinforcing core member 32 in the width direction is 17 N·cm. The bending stiffness value of the reinforcing core material 32 is measured under predetermined measurement conditions (measuring device: Olsen stiffness tester, environmental temperature: 20°C, environmental relative humidity: 65% RH, deviation angle: 40 degrees). rice field. The reinforcing core material 32 may be made of only synthetic resin instead of being made of woven fabric or non-woven fabric impregnated with synthetic resin.

The reinforcing core 32 is arranged so as not to overlap the medial longitudinal arch support 24 , the lateral longitudinal arch support 26 and the lateral arch support 28 . Further, the reinforcing core member 32 has a first core member portion 32a extending in the length direction, a second core member portion 32b extending in the width direction, and a third core member portion 32c extending in the length direction. are doing.

Here, one end (rear end) of the first core part 32a is positioned outside the heel-corresponding region 10a, and the other end (front end) of the first core part 32a is positioned between the arch-corresponding region 10b and the toe. It is located in the outer portion around the boundary of the corresponding region 10c. One end (outer end) of the second core portion 32b is connected to the other end of the first core portion 32a, and the other end (inner end) of the second core portion 32b is connected to the arch corresponding region 10b. and the toe-corresponding region 10c. Furthermore, one end (rear end) of the third core portion 32c is connected to the other end of the second core portion 32b, and the other end (front end) of the third core portion 32c is connected to the toe corresponding region 10c. located in the inner part. One end of the first core member 32a may be positioned on the outer side of the arch-corresponding region 10b instead of being positioned on the outer side of the heel-corresponding region 10a.

Next, the effects of the walking insole 10 according to the embodiment of the present invention will be described.

As described above, the reinforcing core member 32 is provided inside the insole main body 14, and the reinforcing core member 32 is composed of the first core member 32a, the second core member 32b, and the third core member having the above-described configuration. 32c. Also, the height of the heel corresponding region 10a gradually increases from the center in the width direction toward the outside in the width direction. Therefore, walking can be guided inward in the width direction so that the load center during walking follows the ideal load center trajectory CT. As a result, according to the walking insole 10 according to the embodiment of the present invention, it is possible to sufficiently prevent the foot from flowing outward in the width direction during walking, thereby facilitating walking.

Therefore, according to the insole 10 for walking according to the embodiment of the present invention, it is possible to improve the wearer's health by increasing the walking efficiency during walking of the wearer, and performing comfortable walking.

It should be noted that the present invention is not limited to the description of the above-described embodiments, and can be implemented in various other aspects by making appropriate modifications. In addition, the scope of rights included in the present invention is not limited to the above-described embodiments, but also includes cases where the walking insole 10 is installed on the inner bottom surface of sports shoes, jogging shoes, business shoes, or the like. be.

10 Walking Insole 10a Heel Corresponding Area 10b Arch Corresponding Area 10c Toe Corresponding Area 14 Insole Body 16 Upper Insole Body 18 Lower Insole Body 24 Medial Longitudinal Arch Support 26 Outer Vertical Arch Support 28 Lateral Arch Support 32 Reinforcement Core Material 32a First core part 32b Second core part 32c Third core part Bb Inner longitudinal arch Bc Outer longitudinal arch Bd Lateral arch CT Ideal load center trajectory

Claims (3)

A convex medial longitudinal arch support (24), a convex lateral longitudinal arch support (26) and a convex transverse arch support (28) are formed to keep the three arches on the surface, and the heel corresponding area (10a ) An insole having an insole body (14) with a peripheral heel cup (30) formed thereon ,
On the back surface of the insole main body (14),
In the vicinity of the calcaneus projection, an oval hole is formed to the extent that it includes the calcaneus projection, and the area from the heel corresponding region (10a) to the arch corresponding region (10b) is crimped and has high hardness. comprising a reinforcing shell (20),
The heel-corresponding region (10a) on the surface of the insole main body (14) is
The thickness gradually increases from the vicinity of the inner end that is inner than the center of the oblong hole in the width direction to the outer edge in the width direction,
Furthermore, a reinforcing core material (32) is provided inside the insole main body (14),
The reinforcing core material (32) is
From the vicinity of the boundary between the heel-corresponding region (10a) and the arch-corresponding region (10b), through the region including the fifth and fourth metatarsal bones, from the head of the fifth metatarsal bone to The first predetermined width passes through a region immediately behind the head of the second metatarsal bone and covers the region from the head of the first metatarsal bone to the base of the first distal phalanx. An insole , characterized in that it has a band-like shape with a greater width . The insole body (14) is formed by joining an upper insole body (16) made of urethane worm and a lower insole body (18) made of urethane worm and joined to the back surface of the upper insole body (16). is formed and
Further, the reinforcing core material (32) is provided between the upper insole body (16) and the lower insole body (18),
The insole according to claim 1 , further characterized in that a surface layer member is joined to the surface of the upper insole body (16) . The core material (32) is
3. The insole according to claim 1 , wherein the insole is composed of a woven fabric or non-woven fabric impregnated with synthetic resin, or only synthetic resin .

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