JP2022083602A - Shoe sole - Google Patents

Abstract

To provide a shoe sole for the purpose of foot care, a shoe sole that enables walking with less burden for a person who needs foot protection because of foot lesion due to light diabetes, etc., for a person whose feet are impaired, and even for a healthy person, by promoting normal walking to reduce burden on the feet or ankles, walking with outward weight shift on the foot.SOLUTION: In the grounding face side of a shoe sole, in a position corresponding from the fifth to the first metatarsal bones of the sole of a foot, a hard member is arranged which is gradually thinner on the top face from the fifth toe side to the first toe side. The hard member faces from the fifth toe side toward the direction of the tip of the first toe side, extending from the middle of the fourth metatarsal to the proximal of the first metatarsal. With the underside on the grounding face side flattened, the width is gradually tapered from the fifth toe side to the first toe side. Also, the hard member is made harder than the shoe sole body.SELECTED DRAWING: Figure 1

Description

The present invention relates to the sole of a shoe, and more specifically, it is less by promoting normal tilting walking not only in a healthy person but also in a person who is required to protect the foot due to a foot lesion due to mild diabetes. It relates to a shoe sole for so-called foot care, which enables an ideal walking motion with a burden and reduces the burden on the foot or toes.

The walking movement varies greatly depending on the individual, and various walking can be seen, but walking is generally recommended as normal walking. This is because the load moves forward from the outside of the heel to the outside in the longitudinal direction, and then the load is transferred from the small toe ball to the hallux ball to increase the propulsive force of kicking, mainly around the hallux. It repeats kicking out as the center and moving forward.

However, if a disease such as diabetes causes neuropathy, inflammation, or ulcer in the foot and the foot is damaged, it may be difficult to step on the forefoot and kick it out.

Therefore, as a technique for promoting tilting walking, an insole, an insole or a sole that is inclined in the lateral direction of the shoe has been proposed, and the outer side is harder than the inner side in the lateral direction of the shoe. Multiple insoles, insoles or soles are presented.

For example, in Japanese Patent Application Laid-Open No. 2006-247218, the toe side and the heel part side of the bottom member of the footwear body are made thin, and the heel part is made thicker in the vicinity of the metatarsal bone. The inclination angle gradually becomes gentle toward the boat-shaped bone, becomes flat near the metatarsal bone, and gradually becomes thinner from the outside to the medial side from the metatarsal bone to the toe direction. Disclosed is a technique that enables weight transfer in line with a tilted walk depending on the configuration (Patent Document 1).

Further, in the practical proposal No. 3041007, the sole is composed of the toe part and the main part, and the third bottom surface is the outside of the foot among the three bottom surfaces (second to fourth bottom surfaces) constituting the main part. It is disclosed that the sole is characterized in that the thickness is gradually increased from the to the inside, thereby suppressing the load from being applied to the inside during walking and enabling the tilting motion (Patent Document 2).

JP 2006-247218 Utility model No. 3041007

However, in the invention of Patent Document 1, although each part of the bottom is inclined in order to promote tilting walking, the ground surface is inclined, so that the ball of the mother toe, the ball of the small toe, and the MTP joint ( It is hard to say that the burden on the metatarsophalangeal joint) is reduced, and as mentioned above, the burden is large for a person with a disability in the foot.

Further, in Patent Document 2, of the ground contact surface of the sole, the forefoot portion is inclined upward and the heel portion is thinned toward the tip, and becomes unstable when standing. Furthermore, the part from the Lisfranc joint to the Chopard joint has a flat ground plane and its width gradually increases from the outside to the inside, but for people with foot disabilities, the priority when walking is load. If the ground contact surface of the shoe sole is inclined vertically and horizontally in this way, stability cannot be ensured and it cannot be said that the load is reduced.

Therefore, the present invention promotes swaying walking while reducing the load received when walking not only for healthy persons but also for persons who are required to protect their feet due to foot lesions due to mild diabetes as described above. Provide soles for so-called foot care to prevent injuries to the feet or toes.

According to the first aspect of the present invention, the upper surface of the shoe sole is gradually thinned from the fifth toe side to the first toe side at a position corresponding to the space between the fifth metatarsal bone and the first metatarsal bone of the sole of the foot. It is a shoe sole characterized by arranging a rigid member.

Since the hard member is placed behind the ball of the toe, the ball of the small toe, and the MTP joint, which are the most loaded when walking, it prevents excessive load from being applied to this part and causes diseases of the foot such as diabetes. The load on the person holding it is small. In addition, the upper surface of the hard member is gradually thinned from the 5th toe side to the 1st toe side, thereby promoting the load to the 1st toe side, that is, the inner toe side, and promoting the swinging walking motion in kicking from the middle stage of stance. Fulfill.

In the invention of claim 2, the hard member extends from the fifth toe side toward the tip of the first toe side and extends from the middle of the fourth metatarsal bone toward the proximal side of the first metatarsal bone. It is a shoe sole member characterized by.

Since the hard member extends so as to avoid the vicinity of the toe ball, which is a region to be stepped on when kicking forward, and the MTP joint which bends when moving forward, the load on the sole of the foot is reduced. Further, since the side extending backward is longer than the side extending toward the tip of the first toe side, it is easy to bend toward the first toe side, the range for promoting weight transfer is wide, and the inclination of the upper surface is higher. The synergistic effect promotes load transfer to the first toe side.

The invention of claim 3 is characterized in that the lower surface of the hard member on the ground contact surface side is flattened, and the width thereof is gradually tapered from the fifth toe side to the first toe side.

As a result, the entire ground contact surface of the sole is kept flat, so that stability is ensured and the burden on the sole of the foot can be reduced. Further, the thickness of the hard member in the width direction is gradually tapered from the fifth toe side to the first toe side to minimize the area to which the load is applied, and the inclination of the upper surface can promote the transfer of the load.

According to the fourth aspect of the present invention, the hard member is a sole that is harder than the sole body.

As a result, the momentum of the load passing through the hard member can be linked to bending and kicking, so that walking is possible with a small burden. Since the hard member is located at the lower limit of the range in which the load during walking shifts from the 5th toe side to the 1st toe side, it does not conflict with the stepping area or the MP joint, that is, the flexion area, and has a small load. Can pass.

In the present invention, on the ground contact surface side of the sole, a hard member whose upper surface gradually becomes thinner from the fifth toe side to the first toe side is arranged between the fifth metatarsal bone and the first metatarsal bone of the sole. Then, the load transmitted from the lateral posterior was transferred to the medial side, and the rigid member extended from the middle of the fourth metatarsal bone toward the proximal side of the first metatarsal bone to flatten the ground contact surface side. As a result, the shape avoids the area where the load increases in the stepping area and the flexion area of the MTP joint, and the increase in the load applied to the sole of the foot during the walking motion is avoided. By making the hard member harder than the sole body, the momentum of load transfer can be efficiently linked to walking, reducing the burden of stepping, bending, and kicking. These are suitable not only for healthy people but also for people with diabetes and other foot diseases. In addition, by encouraging tilting walking by ideal load transfer, ideal walking motion can be achieved with less burden, and a stable and well-balanced walking feeling can be obtained.

View from the ground plane side of the sole of the present invention Cross-sectional view of FIGS. 1a-a Top view of the sole overlaid with the skeleton of the foot Top view of the sole and sole showing the stepping area and MTP joint (flexion area) Top view of Example 2

Hereinafter, embodiments of the sole of the present invention will be described. FIG. 1 is a plan view of the ground surface side of the shoe sole according to the embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line aa of the hard member shown in FIG. FIG. 4 is a view showing a flexion region of a stepping portion and an MTP joint (metafoot toe joint), and FIG. 5 is a plan view of Example 2.

The sole of the present invention is made of a material usually used as a sole material such as rubber, PVC, EVA, and polyurethane, and its hardness is Asker C hardness of 45 to 60 degrees, more preferably 50 to 55 degrees. .. The hard member 2 is arranged at the position shown in FIG. 1, and more specifically, as shown in FIG. 3, is arranged on the ground contact surface side of the shoe sole at a position corresponding to the position between the fifth metatarsal bone and the first metatarsal bone. , A form extending posteriorly from the middle of the 4th metatarsal toward the proximal side of the 1st metatarsal.

More specifically, as shown in FIG. 4, the hard member 2 is arranged in the range from the MTP joint 4 and the ball of the foot to the ball of the small toe, that is, at a position behind the stepping portion 5, and its shape is in the fifth middle. It extends from the middle of the foot bone toward the tip of the first toe, that is, toward the toe, and extends posteriorly from the middle 34 of the fourth metatarsal bone to the proximal 32 of the first metatarsal bone 31. The arrangement and shape avoiding a series of walking motion areas from load transfer to bending and trampling can promote load transfer while reducing the load due to walking. If it is placed in front of the above position, it will come into contact with the range from the ball of the ball to the small toe and the MTP joint, which will increase the load on the head of the metatarsal bone, or kick out from the step. It becomes an obstacle to the operation leading to the above and does not reduce the load. The position where the rigid member is arranged is a position where the load on the sole of the foot due to the load transfer during walking is relatively small, and the load applied to each operation of stepping, bending, and advancing from the load transfer can be suppressed.

As shown in FIG. 2, the lower surface 21 of the hard member 2, that is, the ground contact surface side is flat, and the upper surface 22 is gradually thinned from the fifth toe side to the first toe side. The thickness of the hard member 2 in the height direction is 7 mm to 10 mm on the fifth toe side 23, and if it is made higher than this, the cushioning property may deteriorate and impact absorption may not be ensured, so it is more preferably 7.5 mm. did. The thickness of the first toe side 24 is 3 mm or more, and the height is not the same as that of the fifth toe side. If the thickness is 3 mm or less, the hard member may be worn away due to friction caused by walking, and the effect of the present invention may not be obtained at an early stage. Therefore, the thickness is more preferably 3.5 mm. Further, by providing the side wall 25 on the fifth toe side of the hard member 2, it is possible to prevent excessive supination in which the load is excessively transferred to the outside and improve the stability.

The hard member 2 is formed of rubber and has a shore A hardness of 70 to 80 degrees, more preferably 75 degrees. By making it harder than the sole, it overcomes the hard member just before the load transfer during walking, that is, the load transmitted from the outside shifts to the inside, and with the momentum after overcoming it, stepping on and bending the MTP joint, the first Since the load is released to the toes, the load on each part of the sole of the foot, including the ball of the toe, is less than before, and the flexion moment is used to move forward, enabling efficient stepping and kicking.

The action of the sole of the present invention is as follows. The load generated when landing on the heel moves to the outside of the sole of the foot according to the walking motion, and the hard member 2 is placed in front of the Lisfranc joint 6 and near the middle of the fifth metatarsal bone 33, and the load is applied. When it reaches the hard member, the upper surface gradually becomes thinner from the 5th toe side to the 1st toe side, and extends from the 5th toe toward the toe of the 1st toe, from the middle to the 4th metatarsal bone. 1 The shape that extends posteriorly toward the proximal part of the metatarsal bone promotes load transfer to the first toe side, steps on the stepping area with the momentum over the hard member, and bends the MTP joint to the first toe. It is possible to perform a kicking motion centered on it.

FIG. 5 is a plan view of a ground contact surface of a shoe sole showing another embodiment of the present invention. The rubber member 30 integrated with the hard member 2 extends from the front of the heel portion along the outer peripheral edge of the sole 1 to the inner side of the heel via the stepping portion, and reaches the front of the heel along the outer peripheral edge of the inner sole. It has a shape. The rubber member 30 has a shore A hardness of 55 to 65 degrees, and is formed with a hardness different from that of the sole and the hard member. As a result, the rubber member 30 located on the track of the load transfer during walking promotes the load transfer without imposing a burden on the sole of the foot, and shifts so as to get over the rubber member 30 so that the effect of the present invention can be exhibited. Further, by making a notch between the hard member and the rubber member, it is possible to smoothly bend during walking.

Further, a side wall is provided on the outer edge of the rubber member 30, which can prevent the foot from becoming unstable such as supination in the process from landing to kicking, and the heel portion. The lightness of the shoe can be maintained by not arranging the rubber member in the central part from the rear to the stepping part.

It corresponds to the proximal 32 of the first metatarsal bone from the middle of the fifth metatarsal bone 33 of the sole of the foot on the ground contact surface side of the sole 1 which is composed of an EVA foam body and has a hardness of 50 degrees as the Asker C hardness. At the position, the thickness of the 5th toe side in the height direction is 7.5 mm, the thickness of the 1st toe side is 3.5 mm, and the upper surface is gradually thinned from the 5th toe side to the 1st toe side. Placed.

The rigid member 2 is provided with a side wall on the fifth toe side, extends from the fifth toe toward the toe of the first toe, and extends posteriorly from the middle of the fourth metatarsal bone 34 toward the proximal 32 of the first metatarsal bone. The lower surface thereof was flat, and the thickness in the width direction was gradually tapered from the fifth toe side to the first toe side. The material was rubber, and the hardness was shore A hardness of 75 degrees.

In the shoe sole of the present invention, the hard member arranged on the contact surface side promotes the load transfer during walking, and the load overcomes the hard member to perform bending, bending, and kicking from stepping on the foot. It is possible to promote normal tilting walking while reducing the burden on the feet of people with a disease or disorder in the part, those who need to protect their feet, and healthy people, and reduce the load on the feet or toes. It works and is useful as a sole function for foot care. In addition, this function is not limited to a specific age group or shoe type, and can be widely used by children and the elderly.

1 ... Shoe sole 2 ... Hard member 21 ... Bottom surface 22 ... Top surface 23 ... Fifth toe side 24 ... First toe side 25 ... Side wall 3 ... Metatarsal bone 30 ... Rubber member 31 ... First metatarsal bone 32 ... First middle Proximal 33 of the footbone ... 5th metatarsal bone 34 ... 4th metatarsal bone 4 ... MTP joint 5 ... trampling part 6 ... Lisfranc joint

The invention of claim 1 is arranged at a position corresponding to a shoe sole body having a ground contact surface and a position corresponding to the space between the fifth metatarsal bone and the first metatarsal bone on the ground contact surface side of the shoe sole body, and has a band shape in a plan view. The rigid member extends from the middle of the fifth metatarsal bone to the middle of the fourth metatarsal bone in the toe direction in a plan view, and the hard member extends from the middle of the fourth metatarsal bone to the first. 1 Extends toward the heel in a plan view toward the proximal part of the metatarsal bone, the hardness of the hard member is higher than the hardness of the member constituting the shoe sole body, and the upper surface of the hard member is on the fifth toe . The sole is characterized in that it is inclined so as to gradually become thinner from the corresponding position toward the position corresponding to the first toe.

Since the hard member is placed on the heel side in a plan view from the ball of the toe, the ball of the small toe, and the MTP joint, which are most loaded during walking, it is possible to prevent excessive load from being applied to this site, including diabetes. The burden is less for those who have a disease in their toes. In addition, the upper surface of the hard member is gradually thinned from the position corresponding to the 5th toe side to the position corresponding to the 1st toe side , thereby promoting the load to the 1st toe side, that is, the inner toe side, and in kicking from the middle stage of stance. It plays a role in promoting the walking movement.

Further, the rigid member extends from the middle of the fifth metatarsal bone to the middle of the fourth metatarsal bone in the toe direction in a plan view, and from the middle of the fourth metatarsal bone to the middle of the first metatarsal bone. It extends in the direction of the ankle in plan view toward the proximal side. As a result, the hard member extends so as to avoid the vicinity of the toe ball, which is the area to be stepped on when kicking forward, and the MTP joint which bends when moving forward, so that the load on the sole of the foot is reduced. Will be done. Further, since the side extending backward is longer than the side extending toward the tip of the first toe side, it is easy to bend toward the first toe side, the range for promoting weight transfer is wide, and the inclination of the upper surface is higher. The synergistic effect promotes load transfer to the first toe side. Further, the hardness of the hard member is higher than the hardness of the member constituting the sole body. As a result, the momentum of the load passing through the hard member can be linked to bending and kicking, so that walking is possible with a small burden. Since the hard member is located at the lower limit of the range in which the load during walking shifts from the fifth toe side to the first toe side, it does not conflict with the stepping area or the MTP joint, that is, the flexion area, and with a small load. Can pass.

In the invention of claim 2, in the invention of claim 1, the lower surface of the hard member is flat, and the width thereof gradually increases from the position corresponding to the fifth toe to the position corresponding to the first toe. It is characterized by being tapered.

Claims (4)

On the ground contact surface side of the shoe sole, a hard member whose upper surface gradually becomes thinner from the 5th toe side to the 1st toe side is placed at a position corresponding to the space between the 5th metatarsal bone and the 1st metatarsal bone of the sole. The sole of the shoe is characterized by the fact that it has been done. The sole according to claim 1, wherein the hard member extends from the fifth metatarsal side toward the tip of the first toe side and extends proximally from the fourth metatarsal bone to the first metatarsal bone. The sole according to claim 1 or 2, wherein the lower surface of the hard member is flat, and the width thereof is gradually tapered from the fifth toe side to the first toe side. The sole according to claim 1 to 3, wherein the hard member is made harder than the sole body.

Images