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Midsole Structure for an Athletic Shoe

Inactive Publication Date: 2020-10-01
MIZUNO CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a midsole structure for a shoe that improves touch and cushioning property at the ball of the foot and enhances the propulsion force during exercises. This is achieved by placing a thick sheet layer made of foamed rubber at the ball of the foot portion and a thin sheet layer made of foamed rubber at the toe portion. Additionally, the midfoot body is made of foamed resin, reducing the overall weight of the midsole structure.

Problems solved by technology

In athletic shoes such as running shoes and the like, since a sole thickness of a toe is thin, it is difficult to insert the relatively thick core material (or insole board) made of foamed rubber according to the prior art into a tip end of the toe.
Also, in the prior-art structure, since the rubber sole body is used, there is a deficiency that the weight of the entire sole is heavy.

Method used

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  • Midsole Structure for an Athletic Shoe
  • Midsole Structure for an Athletic Shoe
  • Midsole Structure for an Athletic Shoe

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0060]FIGS. 1 to 4 show a midsole structure for an athletic shoe according to a first embodiment of the present invention. As shown in FIGS. 1 and 2, the midsole structure 1 includes a midsole body 2 extending from the heel region H through the midfoot region M to the forefoot region H and a sheet composite (see hatched portions) 3 extending from the heel region H through the midfoot region M to the forefoot region H on a side of an upper surface (i.e. a foot-sole-contact-side surface) 20 of the midsole body 2. On a lower surface (i.e. a ground-contact-side surface) 22 of the midsole body 2, an outsole 4 is fixedly attached that has a ground-contact surface that contacts the ground. As shown in FIGS. 2 to 4, the midsole body 2 has an upraised portion 21 that extends upwardly from an outer circumferential edge portion of the upper surface 20. A bottom portion of an upper (not shown) of the shoe is to be fixedly attached to the upraised portion 21. In such a manner, the athletic shoe ...

second embodiment

[0091]FIGS. 5 to 8 show a midsole structure for an athletic shoe according to a second embodiment of the present invention. In these drawings, like reference numbers indicate identical or functionally similar elements to those in the first embodiment. In the first embodiment, an example was shown in which the concave portions 2A, 2B that house the sheet composite 3 are formed on the upper surface (i.e. the foot-sole-contact-side surface) 20 of the midsole body 2. In this second embodiment, the concave portions 2A, 2B that house the sheet composite 3 are formed on the lower surface (i.e. the ground-contact-side surface) 22 of the midsole body 2.

[0092]That is, the concave portion 2B disposed below is open to the lower surface 22 and the concave portion 2A disposed above is open to the lower surface 22 through the concave portion 2B. Neither of the concave portions 2A, 2B are not open to the upper surface 20.

[0093]Also, generally longitudinal lengths of the upper sheet 30 and the lower...

third embodiment

[0098]FIGS. 9 to 12 show a midsole structure for an athletic shoe according to a third embodiment of the present invention. In these drawings, like reference numbers indicate identical or functionally similar elements to those in the first and second embodiments. In the first embodiment, an example was shown in which the concave portions 2A, 2B that house the sheet composite 3 is open to the upper surface 20 and is not open to the lower surface 22 of the midsole body 2, and in the second embodiment, an example was shown in which the concave portions 2A, 2B is open to the lower surface 22 and is not open to the upper surface 20 of the midsole body 2.

[0099]In this third embodiment, the concave portions 2A and 2B are open to both of the upper and lower surfaces 20, 22 of the midsole body 3. Also, in this third embodiment, the lower sheets 31, 31′ composing the sheet composite 2 do not extend from the heel region H through the midfoot region M to the forefoot region F. The lower sheets ...

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Abstract

The midsole structure for an athletic shoe includes a midsole body made of foamed resin, and a sheet composite extending at least from the ball of the foot portion to the toe portion in the midsole body and comprising a plurality of foamed rubber sheets that are overlapped and shifted in the longitudinal direction. The sheet composite comprises a single sheet at the toe portion and a plurality of sheets at the ball of the foot portion.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates generally to a midsole structure for an athletic shoe, and more particularly, to an improvement in the midsole structure so as to improve cushioning property and a touch on a foot of a shoe wearer and enhance a propulsion force during exercises.[0002]Japanese patent application publication No. 2001-149101 discloses a sole structure for a boot. The sole includes a rubber sole body, a core material disposed above the sole body and made of foamed rubber, and a rubber-made shape-keeping material sandwiched between the sole body and the core material. The publication describes that a favorable cushioning property can be exhibited by the relatively thick core material made of foamed rubber and rigidity can be improved by the rubber-made shape-keeping material (see paras. [0018] to [0022], FIG. 1).[0003]In athletic shoes such as running shoes and the like, since a sole thickness of a toe is thin, it is difficult to insert the r...

Claims

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Application Information

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IPC IPC(8): A43B13/14A43B13/02A43B13/18
CPCA43B13/186A43B13/146A43B13/023A43B7/1425A43B7/1435A43B7/144A43B13/04A43B13/127A43B13/14A43B13/16A43B13/187A43B13/188
Inventor YAHATA, KENTAROYOSHIDA, YOHEIMORITA, AKIRA
Owner MIZUNO CORPORATION
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