SHOCK ABSORBER AND SHOE SOLE

• US 20180310664A1
• Filed: 10/28/2016
• Published: 11/01/2018
• Est. Priority Date: 10/30/2015
• Status: Active Grant

• Current Assignee: ASICS Corporation
• Original Assignee: ASICS Corporation
• Inventors: OGAWA, Tsuyoshi, INOMATA, Takashi, MORIYASU, Kenta
• Granted Patent: US 10,638,809 B2
• Time in Patent Office: Days
• CPC Class Codes: A43B 13/04 Plastics, rubber or vulcanised fibre
• CPC Class Codes: A43B 13/12 Soles with several layers of different materials
• CPC Class Codes: A43B 13/18 Resilient soles skating boots provided with resilient means A43B5/1658
• CPC Class Codes: A43B 13/188 Differential cushioning regions
• CPC Class Codes: A43B 17/003 characterised by the material made of wood A43B17/12, made of sponge, rubber or plastic materials A43B17/14
• CPC Class Codes: A43B 17/006 multilayered
• CPC Class Codes: A43B 17/14 made of sponge, rubber, or plastic materials
• CPC Class Codes: A43B 5/06 Running shoes; Track shoes
• CPC Class Codes: A43B 7/32 with shock-absorbing means resilient soles A43B13/18

Abstract

Provided is a shock absorber formed by a resin composition and provided in a shoe, the shock absorber satisfying all formulas (1) to (4) below when changes in storage elastic modulus between 20° C. to 50° C. are linearly approximated by a least-squares method: Y=aX+b . . . (1); −0.1≤a≤−0.02 . . . (2); 1.0≤b≤16.0 . . . (3); and R²≥0.75 . . . (4), where X represents a temperature (unit: ° C.) of the shock absorber, Y represents a storage elastic modulus of the shock absorber, and R represents a correlation coefficient in the least-squares method.

Claims

1. A shock absorber formed by a resin composition and configured to be provided in a shoe, the shock absorber satisfying all formulas (1) to (4) below when changes in storage elastic modulus between 20°

C. to 50°

C. are linearly approximated by a least-squares method;

Y=aX+b 

 

(1);

−

0.1≤

a≤

−

0.02 

 

(2);

1.0≤

b≤

16.0 

 

(3); and

R2≥

0.75 

 

(4),

where X represents a temperature (unit;

°

C.) of the shock absorber, Y represents a storage elastic modulus (unit;

MPa) of the shock absorber, and R represents a correlation coefficient in the least-squares method.

2. The shock absorber according to claim 1, having:

a storage elastic modulus at 20°

C. of 0.8 MPa or more and 4.0 MPa or less; and

a storage elastic modulus at 50°

C. with respect to the storage elastic modulus at 20°

C. of 1/11.0 to 1/1.6.

3. The shock absorber according to claim 1, having:

a storage elastic modulus at 20°

C. of 1.0 MPa or more and 4.0 MPa or less; and

a storage elastic modulus at 50°

C. with respect to the storage elastic modulus at 20°

C. of 1/4.2 to 1/1.6.

4. The shock absorber according claim 1, being provided at a heel of the shoe.

5. The shock absorber according to claim 4, being provided at a position corresponding to medial process of calcaneal tuberosity of a foot of a wearer when the shoe is worn.

6. The shock absorber according to claim 4, being provided in a range of 5% position to 30% position in a length direction of the shoe sole and in a range of 20% position to 80% position in a width direction of the shoe sole, when a position in the length direction of the shoe sole of the shoe at a heel-side end in the length direction is referred to as 0% position, a position at a toe-side end is referred to as 100% position, a position in the width direction orthogonal to the length direction of the shoe sole at an end on an inner foot side of the shoe is referred to as 0% position, and a position at an end on an outer foot side of the shoe is referred to as 100% position.

7. A shoe sole comprising the shock absorber according to claim 1.

8. The shoe sole according to claim 7, wherein the shock absorber has:

a storage elastic modulus at 20°

C. of 0.8 MPa or more and 4.0 MPa or less; and

a storage elastic modulus at 50°

C. with respect to the storage elastic modulus at 20°

C. of 1/11.0 to 1/1.6.

9. The shoe sole according to claim 7, wherein the shock absorber has:

a storage elastic modulus at 20°

C. of 1.0 MPa or more and 4.0 MPa or less; and

a storage elastic modulus at 50°

C. with respect to the storage elastic modulus at 20°

C. of 1/4.2 to 1/1.6.

10. The shoe sole according to claim 7, wherein the shock absorber is provided at a heel of the shoe.

11. The shoe sole according to claim 10, wherein the shock absorber is provided at a position corresponding to medial process of calcaneal tuberosity of a foot of a wearer when the shoe is worn.

12. The shoe sole according to claim 10, wherein the shock absorber is provided in a range of 5% position to 30% position in a length direction of the shoe sole and in a range of 20% position to 80% position in a width direction of the shoe sole, when a position in the length direction of the shoe sole of the shoe at a heel-side end in the length direction is referred to as 0% position, a position at a toe-side end is referred to as 100% position, a position in the width direction orthogonal to the length direction of the shoe sole at an end on an inner foot side of the shoe is referred to as 0% position, and a position at an end on an outer foot side of the shoe is referred to as 100% position.