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CN-224206272-U - Sole structure suitable for flat feet

CN224206272UCN 224206272 UCN224206272 UCN 224206272UCN-224206272-U

Abstract

The utility model relates to a sole structure suitable for flat feet, which comprises a sole main body with a low front end and a high rear end, wherein the outsole of the sole main body is sequentially divided into a metatarsophalangeal region, a waist region and a heel region from front to back, the inner side part of the metatarsophalangeal region is tilted forwards, the heel region is tilted backwards, the inner waist of the waist region is an arc surface, the triangular pattern position of the inner waist part of the waist region is contracted inwards, the contact area of the inner side region of the waist is reduced, and an elastic sheet is arranged in the sole main body and extends from the heel region to the metatarsophalangeal region. The utility model aims at solving the problems that the stability of the ankle joint is reduced, the ground-leaving pedaling capability is reduced and the internal rotation angles and moments of the ankle joint and the knee joint are increased when the flat foot walks.

Inventors

  • ZHENG JIE
  • HU ZONGXIANG
  • CHEN XUECAN
  • CHEN YUPING
  • QIU SHAOHENG

Assignees

  • 福州海关技术中心

Dates

Publication Date
20260508
Application Date
20250610

Claims (10)

  1. 1. A sole structure suitable for flat feet is characterized by comprising a sole main body with a low front end and a high rear end, wherein the sole main body is sequentially divided into a metatarsophalangeal region, a waist region and a heel region from front to back, the metatarsophalangeal region is tilted forwards, the heel region is tilted backwards, the lower part of the waist region is an arc surface, and an elastic sheet is arranged in the sole main body and extends from the heel region to the metatarsophalangeal region.
  2. 2. A sole structure for a flat foot according to claim 1, wherein the plantar toe area is separated from the lumbar area by a plantar toe joint axis, and the lumbar area is separated from the heel area by a line segment passing through the heel center and perpendicular to the midline of the sole body.
  3. 3. A sole structure for a flat foot according to claim 2, wherein the metatarsophalangeal region comprises 1-2 and 3-5 metatarsophalangeal regions disposed on either side of a midline of the foot, the lumbar region comprises a medial lumbar region and a lateral lumbar region disposed on either side of the midline of the foot, and the heel region comprises a medial heel region and a lateral heel region disposed on either side of the midline of the foot.
  4. 4. A sole structure for a flat foot according to claim 3, wherein the outsole of the 1-2 metatarsophalangeal region is of a one-piece structure, the entire metatarsophalangeal region is tilted upward by 10-15 degrees by taking a straight line passing through the intersection of the axis of the metatarsophalangeal joint and the midline of the foot and perpendicular to the midline of the foot as an axis, the rear end of the metatarsophalangeal region and the front end of the waist region are in arc transition, the heel region is of a one-piece structure, and the heel region is tilted upward by 20-25 degrees by taking a straight line passing through the heel center and perpendicular to the midline of the foot as an axis, and the front end of the heel region and the rear end of the waist region are in arc transition.
  5. 5. The sole structure for a flat foot according to claim 2, wherein the plantar knuckle axis is provided with a V-shaped groove, the plantar toe area is provided with a V-shaped drainage groove A, the V-shaped drainage groove A extends forwards from an intersection point of a foot midline and the plantar knuckle axis, the depth of the V-shaped drainage groove A gradually decreases forwards from an intersection point of the foot midline and the plantar knuckle axis, and the heel area is provided with a V-shaped drainage groove B on the foot midline.
  6. 6. A sole structure for a flat foot according to claim 3, wherein 1-2 parallel V-shaped drainage grooves C are formed in the lateral heel region, the V-shaped drainage grooves C form an included angle of 5-10 degrees with the midline of the foot posteriorly, 1-2 parallel V-shaped drainage grooves D are formed in the 1-2 metatarsophalangeal region, and the V-shaped drainage grooves D form an included angle of 20-25 degrees with the midline of the foot anteriorly.
  7. 7. A sole structure for a flat foot according to claim 3, wherein a plurality of triangular patterns A are distributed on the edge of the 3-5-plantar toe region, one edge of the triangular pattern A coincides with the edge of the sole body, the rest of the 3-5-plantar toe region is provided with a square pattern, one diagonal line of the square pattern is parallel to a midfoot line, a plurality of triangular patterns B are arranged in the waist region, one edge of the triangular pattern B at the edge of the waist outer region coincides with the edge of the sole body, and the distance between the triangular pattern B at the edge of the waist inner region and the edge of the sole body is more than 1 cm.
  8. 8. A sole structure for a flat foot according to claim 3, wherein the elastic sheet comprises a sheet-like elastic sheet body located at the heel center, wherein the front portion of the elastic sheet body is provided with two elastic strips distributed in the inner and outer directions, the elastic strip located on the inner side extends forward from the medial heel region to the first toe region of 1-2 metatarsophalangeal regions, the elastic strip located on the outer side extends forward from the lateral heel region to the fifth metatarsophalangeal region of 3-5 metatarsophalangeal regions, and a front cross strip is connected between the front ends of the two elastic strips, and extends from the fifth metatarsophalangeal region to the first toe region.
  9. 9. The sole structure for a flat foot according to claim 1, wherein the sole body is inclined with a lower lateral end and a higher medial end at an inclination angle of 3-5 degrees, the sole body comprises an outer outsole and a midsole disposed on the outer outsole, the elastic sheet is disposed between the outer outsole and the midsole, an intersection point of a midfoot line of the midsole and an axis of a metatarsophalangeal joint is a half sole datum point, a heel center is a heel datum point, a difference in height between the two datum points is 7-12mm, and a front portion of the midsole is gradually thinned and stopped in front of the sole.
  10. 10. A sole structure for a flat foot according to claim 1, wherein the lower portion of the waist region has a downwardly convex arc surface, wherein the apex of the arc surface is 2mm higher than the intersection of the heel center, the midline of the foot and the axis of the metatarsophalangeal joint.

Description

Sole structure suitable for flat feet Technical Field The present utility model relates to a sole structure suitable for use with flat feet. Background Flat feet, also known as flat foot deformities, are a condition where the medial longitudinal arch of the foot is low or vanishes. Flat feet are congenital and acquired, soft and stiff, but anatomically are caused by the ankle talus sliding inward and downward along the calcaneus. The talus is a tarsal bone with a front wide and rear narrow structure and is positioned in an ankle joint cavity formed by the fibular end and the tibia end. The sliding of the talus down the calcaneus bone causes the following effects: firstly, the wide part of the front end of the talus leaves the joint cavity to cause the large gap of the ankle joint cavity, so that the ankle joint is unstable; Secondly, the talus slides inwards and downwards along the calcaneus to cause the calcaneus to evert, so that the lower limb force line is changed to influence walking ability; Thirdly, the talus slides inwards and downwards along the calcaneus to cause the navicular bone, the cuneiform bone, the metatarsal bone and the like to be pressed forwards. Meanwhile, under the influence of calcaneus eversion, the positions and force lines of the long flexor tendons of the toe and the long flexor tendons of the thumb are changed, so that the hallux eversion is caused, and the stepping-out and stretching force is reduced; Fourthly, the talus slides inwards and downwards along the calcaneus to cause sinking or disappearance of the arch, and when the foot arch cannot be provided for walking, the ankle joint is rotated inwards, so that the pressure of the internal rotation of the knee joint and the like is increased. The change in the anatomical structure causes the lower limb to generate corresponding compensatory movement to ensure the completion of normal actions when the flat foot walks, but the stability of the ankle joint and the ground-off pedaling capability are reduced, and the increase of the internal rotation force of the ankle joint and the knee joint always exists, so that the walking function of the flat foot is affected. The currently common techniques for relieving the burden of flat feet are as follows: One is the corrective insole technology. The shoe pad is mainly characterized in that a hard material is adopted to manufacture a shoe pad with a three-dimensional structure similar to the shape of a normal heel and an arch of the foot, the heel is corrected to be everted and the arch of the foot is supported; and secondly, a stable supporting technology. A hard bracket is arranged in the sole or insole to limit or slow the heel from turning outwards; Thirdly, the width of the sole is increased. The ground contact area of the sole is increased, and the stability of the shoe is improved; Fourthly, massage, heating, heat dissipation and other technologies. Mainly adopts modes of massage, electric heating, ventilation, heat dissipation and the like to improve plantar blood circulation and temperature and humidity conditions in the shoe cavity so as to relieve pain of patients with flat feet. However, the techniques of correcting heel eversion and arch depression in the existing flat-foot shoes are not desirable because they attempt to change the internal balanced structure of the foot with external forces, not only without benefit, but rather cause greater pain to the patient. However, the existing support technology for preventing excessive eversion plays a role. Meanwhile, although the stability during the grounding can be improved by additionally increasing the width of the sole, the balance moment at the medial malleolus side is increased, and the moment of internal rotation during the grounding is also increased, so that the sole width is not preferable. Disclosure of utility model The present utility model has been made in view of the above-mentioned problems occurring in the prior art, and it is an object of the present utility model to provide a sole structure suitable for flat feet. In order to achieve the aim, the technical scheme is that the sole structure suitable for flat feet comprises a sole main body with a low front end and a high rear end, wherein the sole main body is sequentially divided into a metatarsophalangeal region, a waist region and a heel region from front to back, the metatarsophalangeal region is tilted forwards, the heel region is tilted backwards, the lower part of the waist region is an arc surface, and an elastic sheet is arranged in the sole main body and extends from the heel region to the metatarsophalangeal region. Further, the plantar toe region is separated from the waist region by a plantar toe joint axis, and the waist region is separated from the heel region by a line segment passing through the heel center and perpendicular to the foot center line of the sole main body. Further, the plantar toe area comprises 1-2 plantar toe areas and 3-5 plan