Shoe sole and shoe

Patent metadata

Field	Value
Publication number	US-2022015499-A1
Application number	US-202117360035-A
Country	US
Kind code	A1
Filing date	Jun 28, 2021
Priority date	Jul 14, 2020
Publication date	Jan 20, 2022
Grant date	—

Abstract

A shoe sole includes a body portion and a heel holding portion. The heel holding portion is located opposite to a ground contact surface of the body portion and holds a heel portion of a foot at least from a medial foot side. The body portion includes a low hardness portion and a high hardness portion. The high hardness portion is a foam material harder than a foam material of the low hardness portion. The heel holding portion is a resin harder than the foam material of the low hardness portion and the foam material of the high hardness portion. On the medial foot side in a rear foot portion, the low hardness portion is located between the heel holding portion and the high hardness portion in an up-down direction.

First claim

What is claimed is:

1 . A shoe sole comprising:
a front foot portion configured to support a toe portion and a ball portion of a foot; a middle foot portion configured to support an arch portion of the foot; a rear foot portion configured to support a heel portion of the foot, the front foot portion, the middle foot portion, and the rear foot portion being connected in a foot length direction; a body portion having a ground contact surface; and a heel holding portion located opposite to the ground contact surface of the body portion and configured to hold the heel portion of the foot at least from a medial foot side, the body portion including
a low hardness portion being a foam material, and
a high hardness portion disposed opposite to the heel holding portion when viewed from a direction of the low hardness portion, the high hardness portion being a foam material harder than the foam material of the low hardness portion,
the heel holding portion being a resin that is harder than both the foam material of the low hardness portion and the foam material of the high hardness portion, and on the medial foot side in the rear foot portion, the low hardness portion being disposed between the heel holding portion and the high hardness portion in an up-down direction.

2 . The shoe sole according to claim 1 , wherein
the high hardness portion is in direct contact with the low hardness portion, and when a boundary position between the middle foot portion and the rear foot portion is viewed in the foot length direction, on a center line of a region in a foot width direction where the low hardness portion, the high hardness portion, and the heel holding portion are aligned in the up-down direction, a dimension of the low hardness portion in the up-down direction is 20% or more and 50% or less of a dimension of the high hardness portion in the up-down direction.

3 . The shoe sole according to claim 1 , wherein
the heel holding portion includes a medial foot side holding portion configured to face a portion of a peripheral side surface of the heel portion of the foot, the portion being located on the medial foot side, and the medial foot side holding portion has
a medial foot side lower wall portion joined to a part of an upper surface of the body portion, the part of the upper surface of the body portion being located on the medial foot side, and
a medial foot side upper wall portion extending from an outer end portion of the medial foot side lower wall portion in a foot width direction to be spaced from the body portion.

4 . The shoe sole according to claim 3 , wherein
the heel holding portion further includes a lateral foot side holding portion configured to face a portion of the peripheral side surface of the heel portion of the foot, the portion being disposed on a lateral foot side, and the lateral foot side holding portion has
a lateral foot side lower wall portion joined to a part of the upper surface of the body portion, the part being disposed on the lateral foot side, and
a lateral foot side upper wall portion extending from an outer end portion of the lateral foot side lower wall portion in the foot width direction to be spaced from the body portion.

5 . The shoe sole according to claim 4 , wherein, at a boundary position between the middle foot portion and the rear foot portion, the medial foot side holding portion is larger in the foot width direction than the lateral foot side holding portion.

6 . The shoe sole according to claim 4 , wherein an average thickness of the medial foot side holding portion from an inner side surface to an outer side surface is larger than an average thickness of the lateral foot side holding portion from an inner side surface to an outer side surface.

7 . The shoe sole according to claim 4 , wherein, in the middle foot portion, the medial foot side holding portion has a larger maximum dimension in the up-down direction than the lateral foot side holding portion

8 . The shoe sole according to claim 4 , wherein a front end portion of the medial foot side holding portion is disposed forward of a front end portion of the lateral foot side holding portion in a front-rear direction.

9 . The shoe sole according to claim 4 , wherein, when viewed in the foot length direction, a length in which the medial foot side lower wall portion is joined to the body portion is longer than a length in which the lateral foot side lower wall portion is joined to the body portion.

10 . The shoe sole according to claim 3 , wherein
an outer side surface of the medial foot side lower wall portion is inclined downward from the outer end portion of the medial foot side lower wall portion in the foot width direction toward a center position of the shoe sole in the foot width direction, and in a region of the rear foot portion on the medial foot side where the medial foot side holding portion and the high hardness portion are aligned in the up-down direction, an upper surface of the high hardness portion is inclined downward toward a center position in the foot width direction.

11 . The shoe sole according to claim 3 , wherein, when a boundary position between the middle foot portion and the rear foot portion is viewed in the foot length direction, the heel holding portion is spaced apart at a distance from a point at which a center position of the shoe sole in the foot width direction intersects with an upper surface of the low hardness portion, such that the distance is 50% or more of a radius of an imaginary circle circumscribing the shoe sole centered on the point.

12 . The shoe sole according to claim 3 , wherein, when a boundary position between the middle foot portion and the rear foot portion is viewed in the foot length direction, the high hardness portion is spaced apart at a distance from a point at which a center position of the shoe sole in the foot width direction intersects with an upper surface of the low hardness portion, such that the distance is 60% or more of a radius of an imaginary circle circumscribing the shoe sole centering on the point.

13 . The shoe sole according to claim 3 , wherein, in a region of the rear foot portion on the medial foot side where the medial foot side holding portion and the high hardness portion are aligned in the up-down direction, an upper surface of the high hardness portion is located along an outer side surface of the medial foot side lower wall portion.

14 . A shoe comprising:
the shoe sole according to claim 1 ; and an upper portion located above the shoe sole.

Assignees

• Asics Corp

Inventors

• Nakamura Hiroki
• KITAMOTO Keishi
• TAMAKOSHI Yuji
• Yano Seiji
• Masumoto Shingo
• Takemura Shuhei
• Nishimura Hiroaki
• SAKAJO Naoki
• Nakaya Seigo
• Nakayama Kazunaga

Classifications

• A43B13/127

  the midsole being multilayer · CPC title

• A43B7/144 Primary

  situated under the heel, i.e. the calcaneus bone · CPC title

• A43B13/188 Primary

  Differential cushioning regions · CPC title

• A43B3/00

  Footwear characterised by the shape or the use · CPC title

• A43B13/14 Primary

  characterised by the constructive form · CPC title