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US20190000180A1 - Shoe having shoe sole with divided rear foot portion - Google Patents

Shoe having shoe sole with divided rear foot portion Download PDF

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Publication number
US20190000180A1
US20190000180A1 US15/735,914 US201515735914A US2019000180A1 US 20190000180 A1 US20190000180 A1 US 20190000180A1 US 201515735914 A US201515735914 A US 201515735914A US 2019000180 A1 US2019000180 A1 US 2019000180A1
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US
United States
Prior art keywords
divide
medial
lateral
rear end
inclined surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US15/735,914
Other languages
English (en)
Inventor
Kenta Moriyasu
Masaru Ichikawa
Daisuke Kokubu
Ken Sakamoto
Seiya Hayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asics Corp
Original Assignee
Asics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asics Corp filed Critical Asics Corp
Assigned to ASICS CORPORATION reassignment ASICS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ICHIKAWA, MASARU, MORIYASU, KENTA, HAYASHI, SEIYA, KOKUBU, Daisuke, SAKAMOTO, KEN
Publication of US20190000180A1 publication Critical patent/US20190000180A1/en
Abandoned legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
    • A43B13/16—Pieced soles
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/38—Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process
    • A43B13/383—Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process pieced
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
    • A43B23/02—Uppers; Boot legs
    • A43B23/0245—Uppers; Boot legs characterised by the constructive form
    • A43B23/0265—Uppers; Boot legs characterised by the constructive form having different properties in different directions
    • A43B23/027—Uppers; Boot legs characterised by the constructive form having different properties in different directions with a part of the upper particularly flexible, e.g. permitting articulation or torsion
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
    • A43B23/02—Uppers; Boot legs
    • A43B23/0245—Uppers; Boot legs characterised by the constructive form
    • A43B23/0265—Uppers; Boot legs characterised by the constructive form having different properties in different directions
    • A43B23/0275—Uppers; Boot legs characterised by the constructive form having different properties in different directions with a part of the upper particularly rigid, e.g. resisting articulation or torsion
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B5/00—Footwear for sporting purposes
    • A43B5/06—Running shoes; Track shoes

Definitions

  • the present invention relates to a shoe having a shoe sole with a divided rear foot portion.
  • Shoes allowing users to run with a barefoot feel have recently been gaining popularity among some fans. These shoes are made to pursue a barefoot feel.
  • Barefoot-feel shoe soles are thin, and such thin shoe soles will lower the shock-absorbing property.
  • WO2013/168259A1 proposes a shoe allowing the user to run without stress while maintaining its shock-absorbing property. This shoe is expected to suppress pronation of the heel portion (eversion) occurring during the landing period while running, while maintaining its shock-absorbing property.
  • the present invention is directed to a shoe including an upper 8 wrapping around an instep of a foot, and a main sole MS supporting a sole of the foot, wherein:
  • the main sole MS includes a rear end portion 13 on a rear end side, and a rear portion 12 arranged anterior DF to the rear end portion 13 ;
  • a rear surface of the rear portion 12 includes one inclined surface 12 B extending in an upper-rear diagonal direction;
  • a front surface of the rear end portion 13 includes another inclined surface 13 B extending in an upper-rear diagonal direction;
  • the inclined surface 12 B of the rear portion 12 and the inclined surface 13 B of the rear end portion 13 together define a divide portion D 2 at which the inclined surface 12 B of the rear portion 12 and the inclined surface 13 B of the rear end portion 13 are in contact with each other or are capable of contacting each other;
  • the inclined surface 13 B of the rear end portion 13 is set so that the inclined surface 13 B is rotatable relative to the inclined surface 12 B of the rear portion 12 in such a manner that a lower portion of the divide portion D 2 opens (widens).
  • inclined surfaces being in contact with each other means that at least a portion of one inclined surface is in contact with at least a portion of the other inclined surface when not worn. In this case, the load of the forefoot section when worn can easily be supported by the main sole MS.
  • the minimum value of the distance between these surfaces when not worn is preferably greater than 0.0 mm and less than 2.0 mm, and more preferably less than 1.0 mm, and most preferably less than 0.5 mm.
  • the rear portion 12 and the rear end portion 13 can rotate relative to each other with the divide portion D 2 therebetween. This rotation will likely allow rotation of the subtalar joint STJ and the midtarsal joint MTJ of the foot.
  • the divided main sole MS allows flexion and rotation of various joints. As a result, one is likely to enjoy a running feel that is close to a barefoot feel.
  • the third and fourth inclined surfaces 12 B, 13 B of the divide portion D 2 extend in an upper-rear diagonal direction, and the third portion 13 , which receives the load immediately after landing, therefore has a shape that flares downward. Therefore, the load will be easily supported by the third portion 13 .
  • FIG. 1 is a medial side view showing a shoe according to one embodiment of the present invention.
  • FIG. 2 is a lateral side view showing the same. Note that in FIG. 1 and FIG. 2 , areas where mesh fabric is exposed is dotted.
  • FIG. 3 is a perspective view showing a shoe sole as seen from the bottom surface side.
  • FIG. 4 shows a bottom surface of the shoe sole.
  • FIG. 5 is a plan view showing a midsole.
  • FIG. 6A , FIG. 6B , FIG. 6C , FIG. 6D , FIG. 6E , FIG. 6F and FIG. 6G are cross-sectional views taken along respective lines shown in FIG. 4 .
  • FIG. 7 is an exploded perspective view of a midsole showing a first portion to a third portion separated from each other.
  • FIG. 8 is an exploded perspective view showing an insole separated from a main sole. Note that in FIG. 8 , the surface of the paddle is dotted.
  • FIG. 9 is a lateral side view showing the shoe at heel-rise.
  • FIG. 10 is a lateral side view showing the shoe at heel-contact.
  • FIG. 11A , FIG. 11B and FIG. 11C are a medial side view, a plan view and a lateral side view, respectively, showing the foot bone structure.
  • FIG. 12A and FIG. 12B are a back view and a perspective view of a worn shoe showing pronation and internal (medial) rotation of the foot, respectively.
  • FIG. 13A , FIG. 13B , FIG. 13C , FIG. 13D and FIG. 13E are schematic lateral side views showing respective test samples. Note that in these figures, flexible portions are dotted.
  • FIG. 14A , FIG. 14B and FIG. 14C are graphs showing test results.
  • FIG. 15A , FIG. 15B and FIG. 15C are graphs showing test results.
  • FIG. 16 is a lateral side view showing a shoe according to an alternative embodiment.
  • FIG. 17A , FIG. 17B , FIG. 17C , FIG. 17D , FIG. 17E , FIG. 17F and FIG. 17G are cross-sectional views showing other alternative embodiments.
  • the divide portion D 2 includes a diagonal portion 181 extending, from a central portion 13 C in a medial-lateral direction, in an anterior DF-lateral diagonal direction.
  • the diagonal portion 131 of the divide portion D 2 is likely to extend along a plane that intersects the axis of the subtalar joint STJ or the midtarsal joint MTJ. Therefore, at the divide portion D 2 , the inclined surfaces 12 B, 13 B rotate about the axis relative to each other, which will more likely allow rotation of the joints.
  • an angle ⁇ formed between a virtual transverse line VL perpendicular to a central axis S, which extends in a front-rear direction FB of the main sole MS, and the diagonal portion 131 of the divide portion D 2 is set in a range of 10° to 40°.
  • the diagonal portion 131 which is set in such an angle range, is likely to extend along planes that intersect the axes of the joints, which will more likely allow relative rotation about the axes of the joints.
  • a medial edge 1 M of the divide portion D 2 is arranged rearward of a lateral edge 1 L of the divide portion D 2 .
  • the inclined surfaces 12 B, 13 B, which form the divide portion D 2 will likely extend along the intersecting planes. This will more likely allow relative rotation about the axes of the joints.
  • the shoe further includes:
  • an insole 4 being continuous with the upper 3 and covering the sole of the foot, the main sole MS covering the insole 4 from below;
  • a bridging portion 5 B provided so as to bridge between the rear portion 12 and the rear end portion 13 across the divide portion D 2 , wherein the bridging portion 5 B connects between the rear portion 12 and the rear end portion 18 so that the inclined surface 12 B of the rear portion 12 is rotatable relative to the inclined surface 13 B of the rear end portion 13 , wherein:
  • a part of the bridging portion 5 B is arranged between the insole 4 and the rear portion 12 ;
  • bridging portion 5 B is arranged between the insole 4 and the rear end portion 13 .
  • the bridging portion 5 B that connects together the rear portion 12 and the rear end portion 13 is arranged between the insole 4 and the rear portion 12 and arranged between the insole 4 and the rear end portion 13 . Therefore, the rear portion 12 and the rear end portion 18 , which are connected together via the bridging portion 5 B, can easily be positioned with respect to each other. This as a result improves the positioning precision between the main sole MS and the upper 3 , and the performance will be unlikely to vary from one product to another.
  • the bridging portion 5 B is formed from a plate-shaped member that is different (separate) from the main sole MS.
  • the shoe further includes one engagement portion 12 E and another engagement portion 13 E for positioning the bridging portion 5 B, wherein the one engagement portion 12 E is formed on an upper surface of the rear portion 12 , and the other engagement portion 13 E is formed on an upper surface of the rear end portion 13 .
  • the bridging portion 5 B is easily positioned with respect to the rear portion 12 and the rear end portion 13 . This as a result will further improve the positioning precision between the rear portion 12 and the rear end portion 13 .
  • the rear portion 12 and the rear end portion 13 define respective depressions into which the bridging portion 5 B fits, the depression of the rear portion and the depression of the rear end portion form the one engagement portion 12 E and the other engagement portion 1 E, respectively.
  • the bridging portion 5 B fits in the depressions of the rear portion 12 and the rear end portion 13 , and can therefore be easily positioned. This as a result will further improve the positioning precision between the rear portion 12 and the rear end portion 18 .
  • an elastic modulus of the bridging portion 5 B is equal to or greater than an elastic modulus of the insole 4 .
  • the bridging portion 5 F having a large elastic modulus (Young's modulus) will suppress the inadvertent upward relative warping of the rear end portion 13 with respect to the rear portion 12 .
  • the bridging portion 5 B defines a through hole 5 H, the through hole 5 H being arranged so as to extend from the rear portion 12 to the rear end portion 13 .
  • the main sole MS can easily flex at the bridging portion 5 B.
  • a width Wb of the bridging portion 5 B in the divide portion D 2 is set to be 25% to 100% of a width W of the main sole MS.
  • the bridging portion 5 B having a large width Wb improves the positioning precision.
  • a thickness of the bridging portion 5 B is set to be 0.1 mm to 5.0 mm.
  • the bridging portion 5 B being thin contributes to maintaining a light weight, and awkwardness is unlikely to be felt on the sole of the foot.
  • the rear portion 12 extends toward a front direction DF from the rear surface, the rear portion 12 defines a groove 12 G anterior DF to the rear surface, and the groove 12 G is shallower than a depth of the divide portion D 2 and extends in a width direction W of the main sole MS.
  • the main sole MS can easily twist in the rear portion 12 , which will more likely allow relative rotation about the axes of the joints.
  • a medial surface 31 of the upper 3 includes a medial high-rigidity portion 31 H and a medial flexible portion 31 S that bends more easily than the medial high-rigidity portion 31 H, wherein the medial high-rigidity portion 31 H and the medial flexible portion 318 S are separated from each other in a front-rear direction;
  • a lateral surface 32 of the upper 8 includes a lateral high-rigidity portion 32 H and a lateral flexible portion 32 S that bends more easily than the lateral high-rigidity portion 32 H, wherein the lateral high-rigidity portion 32 H and the lateral flexible portion 32 S are separated from each other in a front-rear direction;
  • a front edge portion of the medial high-rigidity portion 31 H and/or the medial flexible portion 31 S extend in an upper-rear diagonal direction from an upper end portion of a medial edge 1 M of the divide portion D 2 ;
  • a front edge portion of the lateral high-rigidity portion 32 H and/or the lateral flexible portion 32 S extend in an upper-rear diagonal direction from an upper end portion of a lateral edge 1 L of the divide portion D 2 .
  • an area of the upper 3 that is in an upper-rear diagonal direction of the divide portion D 2 is compressed as the rear end portion 13 rotates relative to the rear portion 12 of the main sole MS. Since the upper 3 of this example includes the flexible portions 328 , 31 S, the flexible portions 328 , 318 will easily contract (creating creases) at heel-contact. Thus, the rotation at the divide portion D 2 is unlikely to be inhibited.
  • a strip-shaped restraining member 34 M is arranged on the medial-side flexible portion 31 S for restraining stretch of the medial-side flexible portion 31 S in a front-rear direction FB;
  • another strip-shaped restraining member 84 L is arranged on the lateral-side flexible portion 32 S for restraining stretch of the medial-side flexible portion 31 S in a front-rear direction FD.
  • the heel of the foot is likely to rise inside the upper 3 .
  • the flexible portions 328 , 31 S FIG. 1
  • the restraining members 34 L, 34 M are provided on the flexible portions 328 , 31 S. Therefore, it is possible to restrain the stretch of the flexible portion of the upper 3 at heel-rise, and it is therefore possible to prevent the heel from rising inside the upper 3 .
  • Embodiment 1 of the present invention will now be described with reference to FIG. 1 to FIG. 10 .
  • the present embodiment is directed to a shoe sole of a shoe for running or walking, for example.
  • a main sole MS shown in FIG. 1 includes a rubber-made outsole 2 and a resin-made midsole 1 .
  • An upper 3 wrapping around the instep of the foot is provided over the main sole MS.
  • the midsole 1 includes a midsole body made of a resin-made foamed material such as EVA, for example, and may further include a reinforcement device.
  • the term “made of resin” means that a resin component such as a thermoplastic component is contained, and may include any other suitable component.
  • the outsole 2 of FIG. 1 is a tread sole having a higher abrasion resistance than the foamed material of the midsole body, and typically has a higher hardness than the foamed material of the midsole body.
  • the term “made of rubber” means that it contains a natural rubber component or a synthetic rubber component, and it may contain any other component.
  • the midsole 1 of the present embodiment and the insole 4 of FIG. 8 generally cover the entire surface of the sole of the foot.
  • the outsole 2 is attached to the lower surface of the midsole 1 and partially covers the sole of the foot. That is, the main sole MS of FIG. 8 including the midsole 1 and the outsole 2 covers the insole 4 from below and supports the sole of the foot.
  • the insole 4 of FIG. 8 and FIG. 6B to FIG. 6G is continuous with the upper 3 of FIG. 2 .
  • the upper 3 is shaped so as to wrap around the instep of the foot.
  • the shoe may include a shoelace for fitting the upper 3 to the foot.
  • the main sole MS is divided into a toe-side first portion 11 , a second portion (rear portion) 12 arranged posterior DB to the first portion, and a third portion 13 (rear end portion) on the rear end side.
  • the rear surface of the first portion 11 includes a first inclined surface 11 F extending in an upper-front diagonal direction.
  • the front surface of the second portion 12 includes a second inclined surface 12 F extending in an upper-front diagonal direction.
  • the first inclined surface 11 F and the second inclined surface 12 F together define a first divide portion D 1 at which the surfaces 11 F, 12 F are in contact with each other or are capable of contacting each other.
  • the rear surface of the second portion 12 includes a third inclined surface 12 B extending in an upper-rear diagonal direction.
  • the front surface of the third portion 13 includes a fourth inclined surface 13 B extending in an upper-rear diagonal direction.
  • the third inclined surface 12 B and the fourth inclined surface 13 B together define a second divide portion D 2 at which the surfaces 12 B, 13 B are in contact with each other or are capable of contacting each other.
  • the midsole 1 and the outsole 2 are each divided into parts in a front-rear direction at the first and second divide portions D 1 , D 2 (see FIG. 7 ).
  • the second inclined surface 12 F of the second portion 12 is configured so that it can rotate relative to the first inclined surface 11 F of the first portion 11 in such a manner that the lower portion of the first divide portion D 1 opens.
  • the fourth inclined surface 13 B of the third portion 13 is configured so that it can rotate relative to the third inclined surface 12 B of the second portion 12 in such a manner that the lower portion of the second divide portion D 2 opens.
  • the position of the medial edge 1 M of the upper end of the first divide portion D 1 is set in the range of 65% to 75%, from the rear end 1 B of the main sole MS, of the maximum length Lm from the front end 1 F to the rear end 1 B of the main sole MS, along the center axis S ( FIG. 4 ) extending in the front-rear direction FB of the main sole MS.
  • the position of the lateral edge 1 L of the upper end of the first divide portion D 1 is set in the range of 60% to 70%, from the rear end 1 B of the main sole MS, of the maximum length Lm of the main sole MS, along the center axis S of the main sole MS.
  • the line obtained by aligning the upper end of the first divide portion D 1 with the width direction DW of the main sole MS is arranged posterior DB to the metatarsal phalangeal joints MP of the first toe B 1 to the fifth toe B 5 and is arranged anterior DF to the bases B 11 , B 51 of the first to fifth metatarsal bones B 1 , B 5 .
  • the line is arranged posterior DB to the heads B 12 , B 52 of the metatarsal bones.
  • the base refers to a portion of each bone that is close to a joint posterior thereto and that is slightly expanding to a greater thickness, and it is referred to also as the proximal head.
  • the head refers to a portion of each bone that is close to a joint anterior thereto and that is slightly expanding to a greater thickness, and it is referred to also as the distal head.
  • the first divide portion D 1 has a shape that is protruding toward the front direction DF as seen in a plan view.
  • the second divide portion D 2 has a shape that is protruding toward the rear direction DB as seen in a plan view.
  • the first portion 11 is continuous without being divided from the first divide portion D 1 to the tip of the main sole MS.
  • the first portion 11 defines a groove 11 G, the groove 11 G of FIG. 1 being shallower than the depth of the first divide portion D 1 and extending in the width direction DW of the main sole MS of FIG. 4 .
  • the second portion (rear portion) 12 extends toward the front direction DF from the rear surface.
  • the second portion 12 defines a groove 12 G anterior DF to the rear surface.
  • the groove 12 G is shallower than the depth of the second divide portion D 2 ( FIG. 1 ) and extends in the width direction W of the main sole MS.
  • the paddle 5 is formed from a member different from the main sole MS.
  • the elastic modulus of the paddle 5 is greater than or equal to the elastic modulus of the insole 4 and, more preferably, greater than the elastic modulus of the insole 4 .
  • the paddle 5 is formed from a resin-made flat plate having a thickness of 0.1 mm to 5.0 mm, more preferably 0.5 mm to 1.5 mm.
  • the paddle 5 is arranged so as to extend across the first to third portions 11 to 13 .
  • the paddle 5 is sandwiched between the upper surface of the midsole 1 and the lower surface of the insole 4 .
  • the paddle 5 includes a bridging portion 5 F on the forefoot side, and a bridging portion 5 B on the rear foot side.
  • a portion of the bridging portion 5 F on the forefoot side of FIG. 8 is arranged between the insole 4 and the first portion 11 .
  • another portion of the bridging portion 5 F is arranged between the insole 4 and the second portion 12 .
  • a portion of the bridging portion 5 B on the rear foot side is arranged between the insole 4 and the second portion 12 .
  • another portion of the bridging portion 5 B is arranged between the insole 4 and the third portion 13 .
  • the first engagement portion 11 E is formed on the upper surface of the first portion 11 and the second engagement portion 12 E is formed on the upper surface of the second portion 12 .
  • the first portion 11 and the second portion 12 of FIG. 7 define the first depression and the second depression, respectively, into which the bridging portion 5 F ( FIG. 8 ) fits, wherein the first depression and the second depression form the first and second engagement portions 11 E and 12 E, respectively.
  • the second engagement portion 12 E is formed on the upper surface of the second portion 12 and the third engagement portion 18 E is formed on the upper surface of the third portion 13 .
  • the second portion 12 and the third portion 13 of FIG. 7 each define a depression into which the bridging portion 5 B ( FIG. 8 ) fits, wherein the depressions form the respective engagement portions 11 E, 12 E.
  • the widths 5 Wf, Wb of the bridging portions 5 F, 5 B of the first and second divide portions D 1 , D 2 are each set to be 25% to 100% of the width W of the main sole MS.
  • the bridging portions 5 F, 5 B define a plurality of through holes 5 H.
  • the through holes 5 H on the forefoot side are arranged so as to extend from the first portion 11 to the second portion 12 .
  • the through holes 5 H on the rear foot side are arranged so as to extend from the second portion 12 to the third portion 13 .
  • the through holes 5 H on the rear foot side are so structured that the third portion 13 can easily be displaced in the width direction DW.
  • the bridging portion 5 F on the forefoot side of FIG. 8 is provided so as to bridge between the first portion 11 and the second portion 12 across the first divide portion D 1 , and the bridging portion 5 F connects between the first portion 11 and the second portion 12 so that the inclined surface 12 F of the second portion 12 is rotatable relative to the inclined surface 11 F of the first portion 11 , as shown in FIG. 9 .
  • the bridging portion 5 B on the rear foot side of FIG. 8 is provided so as to bridge between the second portion 12 and the third portion 13 across the second divide portion D 2 , and the bridging portion 5 B connects between the second portion 12 and the third portion 13 so that the inclined surface 12 B of the second portion 12 is rotatable relative to the inclined surface 13 B of the third portion, as shown in FIG. 10 .
  • the second divide portion D 2 includes a diagonal portion 131 that extends toward the medial side in a diagonal forward direction DF from a central portion 13 C between the medial side and the lateral side.
  • the angle ⁇ formed between a virtual transverse (horizontal) line VL that is perpendicular to the center axis S extending in the front-rear direction FD of the main sole MS and the diagonal portion 131 of the second divide portion D 2 is set in a range of 10° to 40°.
  • the medial edge 1 M of the second divide portion D 2 is arranged posterior DB to the lateral edge 1 L of the second divide portion D 2 .
  • a medial side surface 31 of the upper 3 of FIG. 1 includes a medial-side high rigidity portion 31 H and a medial-side flexible portion 31 S that is more flexible than the medial-side high rigidity portion 31 H, which are separated from each other in the front-rear direction.
  • a lateral side surface 32 of the upper 3 of FIG. 2 includes a lateral-side high rigidity portion 32 H and a lateral-side flexible portion 32 S that is more flexible than the lateral-side high rigidity portion 32 H.
  • the front edge portion of the medial-side high rigidity portion 31 H and/or the medial-side flexible portion 31 S of FIG. 1 extend in an upper-rear diagonal direction from the upper end portion of the medial edge 1 M of the second divide portion D 2 .
  • the front edge portion of the lateral-side high rigidity portion 32 H and/or the lateral-side flexible portion 32 S of FIG. 2 extend in an upper-rear diagonal direction from the upper end portion of the lateral edge 1 L of the second divide portion D 2 .
  • the term “from the upper end portion” means from the upper end or a vicinity thereof.
  • the high rigidity portions may each be formed from a synthetic-resin plate, for example.
  • the low rigidity portions may each be formed from a fabric (cloth) such as a mesh fabric, a knit fabric, a woven fabric or a non-woven fabric, for example.
  • a plurality of strip-shaped restraining members 34 M are arranged on the medial-side flexible portion 31 S of FIG. 1 for restraining the stretch of the medial-side flexible portion 31 S in the front-rear direction FB.
  • Another plurality of strip-shaped restraining members 34 L are arranged on the lateral-side flexible portion 32 S of FIG. 2 for restraining the stretch of the lateral-side flexible portion 32 S in the front-rear direction FD.
  • the restraining members may be a comb-shaped thin film bonded or welded (including transfer printing) on the surface of the mesh fabric.
  • the flexible portion 385 of the upper 3 is formed from a low rigidity material, e.g., a cloth-like fabric such as a mesh fabric, a knit fabric, a woven fabric or a non-woven fabric, for example.
  • a low rigidity material e.g., a cloth-like fabric such as a mesh fabric, a knit fabric, a woven fabric or a non-woven fabric, for example.
  • the flexible portion 35 as described above allows the inclined surface 12 F of the second portion 12 to rotate while moving in an upper-front diagonal direction as shown in FIG. 9 .
  • the paddle 5 is adapted to the engagement portions 11 E to 13 E, which are depressions in the first, second and third portions 11 to 13 , thereby attaching (bonding) the paddle 5 to the upper surface of the midsole 1 .
  • the first portion 11 and the second portion 12 are positioned with respect to each other, and the second portion 12 and the third portion 13 are positioned with respect to each other.
  • the midsole 1 which is made integral by means of the paddle 5 , is bonded to the reverse surface of the insole 4 , which is integral with the upper 3 (not shown; FIG. 1 ).
  • the midsole 1 is not divided in the front-rear direction as described above so that the midsole 1 can easily be positioned with respect to the insole 4 at the time of bonding.
  • the first inclined surface 11 F and the second inclined surface 12 F of the first divide portion D 1 are partly in contact with each other, and there may be a slight gap between the first inclined surface 11 F and the second inclined surface 12 F of the first divide portion D 1 due to manufacturing errors.
  • the first inclined surface 11 F and the second inclined surface 12 F contact each other with a strong pressure due to compressive deformation of the midsole 1 , etc. Therefore, it will be possible to stably support the foot.
  • the upper 8 and the main sole MS flex as shown in FIG. 9 , and the second portion 12 is displaced so as to rotate relative to the first portion 11 .
  • the midsole 1 is attached to the upper 3 via the paddle 5 ( FIG. 8 ). Therefore, the second portion 12 rotates, relative to the first portion 11 , about the vicinity of the upper end of the first divide portion D 1 .
  • the flexible portion 385 of the upper 3 directly above, and anterior/posterior to, the first divide portion D 1 of the present embodiment is formed from a flexible material such as a mesh fabric described above, for example, and the flexible portion 35 can easily be creased 35 W, thereby making it unlikely that the rotation is inhibited.
  • the flexible portion 35 has no defined center of flexion, and therefore the inclined surface 12 F of the second portion 12 rotates while moving in the upper-front diagonal direction in accordance with the flexion of the foot.
  • the subtalar joint (STJ) and the midtarsal joint (MTJ) exist below the ankle. These joints STJ and MTJ can rotate about the axis Ss and the axis Sm, respectively.
  • These axes Ss and Sm are orthogonal to intersecting planes Bs, Bm.
  • the intersecting planes Bs, Bm are inclined planes that are inclined by about 42° and 15° with respect to the vertical plane in FIG. 11A and FIG. 11C .
  • the intersecting planes Bs, Bm are also inclined planes that are inclined by about 20° and 9° with respect to the longitudinal axis of the foot in FIG. 11B .
  • the angle ⁇ 2 formed between the inclined surfaces 12 B, 13 B of the second divide portion D 2 of FIG. 2 and the vertical plane is preferably about 5° to 45° on the lateral side of the foot, more preferably about 10° to 40°, and most preferably about 15° to 35°.
  • the angle ⁇ 1 between the inclined surfaces 12 F, 13 F of the first divide portion D 1 of FIG. 2 and the vertical plane is preferably about 20° to 70° on the lateral side of the foot, more preferably about 25° to 65°, and most preferably about 30° to 60°.
  • the joint STJ of FIG. 11A to FIG. 11C rotates, and the heel thereby pronates as shown in FIG. 12A .
  • the joint MTJ rotates in conjunction with the rotation of the joint STJ of FIG. 11A to FIG. 11C , and the lower leg thereby medially rotates as shown in FIG. 12B .
  • pronation occurs.
  • a shoe structure that allows, without inhibiting, the action of the joints STJ, MTJ, the pronation and the internal rotation.
  • the second divide portion D 2 of the rear foot section extends in an upper-rear diagonal direction
  • the second divide portion D 2 of FIG. 5 includes the diagonal portion 131 on the lateral side. Therefore, immediately after landing such as first strike of FIG. 10 , the lower portion of the second divide portion D 2 is displaced so as to open, and it is unlikely to inhibit the action of the joints STJ, MTJ of FIG. 11A to FIG. 11C , the pronation of FIG. 12A and the internal rotation of FIG. 12B . Therefore, it is likely to realize an action of pronation that is proximate to that during barefoot running.
  • the main sole MS flexes, and the third portion 13 is displaced so as to rotate relative to the second portion 12 .
  • the midsole 1 is attached to the upper 3 via the paddle 5 ( FIG. 8 ). Therefore, the third portion 13 rotates, relative to the second portion 12 , about the vicinity of the upper end of the second divide portion D 2 .
  • the heel of the foot is likely to rise inside the upper 3 .
  • the restraining members 34 L, 34 M are provided on the flexible portions 328 , 31 S ( FIG. 1 ). Therefore, it is possible to restrain the stretch of the flexible portion of the upper 3 at heel-rise, and it is as a result possible to prevent the heel from rising inside the upper 3 .
  • test sample T 1 of FIG. 13A was provided that did not have the divide portions D 1 , D 2 .
  • test samples T 2 to T 5 of FIG. 13B to FIG. 13E were provided as test examples.
  • sample T 2 the main sole MS is divided along a plane that is orthogonal to the axis Ss ( FIG. 11A ).
  • sample T 3 the main sole MS is divided at four divide portions D 1 , D 2 , D 11 , D 21 along planes that are orthogonal to the axis Ss ( FIG. 11A ) and the axis Sm ( FIG. 11A ).
  • diagonal flexible portions 33 S are provided on the medial side and the lateral side of the upper 3 so as to function in conjunction with the divide portions D 1 , D 2 of samples T 2 and T 3 . Note that sample T 1 is not provided with the divide portions and the flexible portions.
  • a test experiment was conducted with one subject at a running speed of 4 min/km. Comparisons were made between running with shoes of FIG. 13A to FIG. 13E and running barefoot. The flexion/extension angle of the foot joint was measured while running, and the ground reaction force was measured in the front-rear direction and in the vertical direction.
  • FIG. 14C shows a comparison result for the work of the foot joint required for push-off. As can be seen from the figure, the amount of work is greater for samples T 2 , T 3 , T 4 , T 5 provided with the divide portions than for barefoot and sample T 1 . It can be seen that this resulted in a greater load on the lower leg.
  • FIG. 15A and FIG. 15B were calculated from the flexion/extension angle. The results are shown in FIG. 15A and FIG. 15B .
  • sample T 1 has a greater absolute value of the pronation angle ⁇ than barefoot, whereas samples T 2 , T 3 , T 4 , T 5 have joint angles closer to barefoot running.
  • sample T 1 has a smaller absolute value of the internal rotation angle ⁇ than barefoot, whereas samples T 2 , T 3 , T 4 , T 5 have joint angles closer to barefoot running.
  • Samples T 2 to T 5 of FIG. 13B to FIG. 13E were produced by modifying the main sole MS and the upper 3 of existing shoes. Therefore, they do not have the paddle ( FIG. 8 ).
  • a shoe of the present invention may have a structure like those of samples T 2 to T 5 , or may have a structure of samples T 2 to T 5 with the paddle ( FIG. 8 ) added thereto.
  • the bridging portions 5 F, 5 B of the paddle 5 of FIG. 8 may be separated from each other.
  • the paddle 5 being continuous from the first portion 11 to the third portion 13 has a greater Young's modulus than the midsole 1 , and will be useful as a reinforcement device of the second portion 12 .
  • the through holes 5 H do not need to be provided in the paddle 5 .
  • protruding portions may be formed on the upper surface of the midsole 1 so as to correspond to the through holes 5 H, so that the upper surface of the midsole 1 in the through holes 5 H is set to be at about the same level (height) as the upper surface of the paddle 5 .
  • this shoe may be provided with grooves Gm arranged in a staggered pattern on the lower surface of the main sole MS and on the upper surface of the main sole MS.
  • FIG. 17A to FIG. 17D show alternative examples.
  • the sections 11 , 12 , 18 of the main sole may be in contact with each other via bridging portions 5 F, 5 B that are protruding downward.
  • the bridging portions 5 F, 5 B may be such that the midsoles are not in direct contact with each other, but outsoles are in direct or indirect contact with each other.
  • FIG. 17E to FIG. 17G show other alternative examples.
  • the upper surface of the midsole 1 is attached to the lower surface of the insole 4 , and the paddle 5 ( FIG. 8 ) is absent.
  • the midsoles 1 may be bound together in areas other than the divide portions D 1 , D 2 via a bonded or welded attachment portion 19 that is dotted in the figure. That is, the midsole 1 may form the bridging portions 5 F, 5 B.
  • the midsole may be provided with gel or pod-like shock-absorbing parts.
  • the main sole may be formed solely from a flexible midsole-like material or solely from an outsole.
  • the present invention is applicable to various shoes for running, walking, training, etc.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
US15/735,914 2015-06-26 2015-06-26 Shoe having shoe sole with divided rear foot portion Abandoned US20190000180A1 (en)

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USD861308S1 (en) * 2019-01-29 2019-10-01 Skechers U.S.A., Inc. Ii Shoe midsole periphery and bottom
USD861310S1 (en) * 2018-12-05 2019-10-01 Skechers U.S.A., Inc. Ii Shoe outsole bottom
USD871734S1 (en) * 2018-05-25 2020-01-07 Nike, Inc. Shoe
USD872435S1 (en) * 2018-05-25 2020-01-14 Nike, Inc. Shoe
USD882229S1 (en) * 2018-03-23 2020-04-28 Gianni Versace S.P.A. Sole for footwear
USD899051S1 (en) * 2018-06-30 2020-10-20 Vionic Group LLC Tread for a footwear outsole
USD913663S1 (en) * 2018-03-08 2021-03-23 Adidas Ag Sole
US20210112924A1 (en) * 2019-10-18 2021-04-22 Nike, Inc. Easy-access article of footwear with cord lock
USD935157S1 (en) * 2021-01-05 2021-11-09 Jiangsu Vital E-commerce Co., Ltd. Sole
US11185125B2 (en) * 2018-12-28 2021-11-30 Nike, Inc. Footwear with jointed sole structure for ease of access
USD939198S1 (en) * 2021-01-05 2021-12-28 Huaian Balu International Trade Co., Ltd Sole
USD948188S1 (en) * 2021-06-09 2022-04-12 Nike, Inc. Shoe
USD949536S1 (en) * 2021-06-09 2022-04-26 Nike, Inc. Shoe
USD956406S1 (en) * 2021-07-22 2022-07-05 Nike, Inc. Shoe
US11439197B2 (en) 2016-10-26 2022-09-13 Nike, Inc. Hinged footwear sole structure for foot entry and method of manufacturing
CN115697121A (zh) * 2020-07-13 2023-02-03 耐克创新有限合伙公司 具有用于向前动量的鞋底夹层突起和弧形轮廓的鞋底结构
US11589653B2 (en) 2019-11-25 2023-02-28 Nike, Inc. Tension-retaining system for a wearable article
US20230148708A1 (en) * 2021-11-12 2023-05-18 Nike, Inc. Articles of footwear and other foot-receiving devices having dynamically adjustable heel portions
USD1005658S1 (en) * 2023-03-23 2023-11-28 Nike, Inc. Shoe
USD1007121S1 (en) * 2023-03-23 2023-12-12 Nike, Inc. Shoe
USD1008623S1 (en) * 2023-03-22 2023-12-26 Nike, Inc. Shoe
USD1008624S1 (en) * 2023-03-22 2023-12-26 Nike, Inc. Shoe
USD1009429S1 (en) * 2023-03-23 2024-01-02 Nike, Inc. Shoe
USD1009435S1 (en) * 2023-03-24 2024-01-02 Nike, Inc. Shoe
USD1017205S1 (en) * 2021-05-21 2024-03-12 SR Holdings, LLC Footwear sole
USD1018002S1 (en) * 2023-04-17 2024-03-19 Skechers U.S.A., Inc. Ii Shoe outsole bottom
US12402689B2 (en) 2022-11-28 2025-09-02 Nike, Inc. Footwear with jointed sole structure for ease of access

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US11445781B2 (en) 2016-10-26 2022-09-20 Nike, Inc. Hinged footwear sole structure for foot entry and method of manufacturing
US11439197B2 (en) 2016-10-26 2022-09-13 Nike, Inc. Hinged footwear sole structure for foot entry and method of manufacturing
USD1041844S1 (en) 2018-03-08 2024-09-17 Adidas Ag Sole
USD913663S1 (en) * 2018-03-08 2021-03-23 Adidas Ag Sole
USD882229S1 (en) * 2018-03-23 2020-04-28 Gianni Versace S.P.A. Sole for footwear
USD871734S1 (en) * 2018-05-25 2020-01-07 Nike, Inc. Shoe
USD872435S1 (en) * 2018-05-25 2020-01-14 Nike, Inc. Shoe
USD899051S1 (en) * 2018-06-30 2020-10-20 Vionic Group LLC Tread for a footwear outsole
USD861310S1 (en) * 2018-12-05 2019-10-01 Skechers U.S.A., Inc. Ii Shoe outsole bottom
USD862060S1 (en) * 2018-12-05 2019-10-08 Skechers U.S.A., Inc. Ii Shoe outsole bottom
US11185125B2 (en) * 2018-12-28 2021-11-30 Nike, Inc. Footwear with jointed sole structure for ease of access
US20220039512A1 (en) * 2018-12-28 2022-02-10 Nike, Inc. Footwear with jointed sole structure for ease of access
US11666115B2 (en) * 2018-12-28 2023-06-06 Nike, Inc. Footwear with jointed sole structure for ease of access
US12004588B2 (en) * 2018-12-28 2024-06-11 Nike, Inc. Footwear with jointed sole structure for ease of access
US20230301396A1 (en) * 2018-12-28 2023-09-28 Nike, Inc. Footwear with jointed sole structure for ease of access
USD861308S1 (en) * 2019-01-29 2019-10-01 Skechers U.S.A., Inc. Ii Shoe midsole periphery and bottom
US20210112924A1 (en) * 2019-10-18 2021-04-22 Nike, Inc. Easy-access article of footwear with cord lock
US11707113B2 (en) * 2019-10-18 2023-07-25 Nike, Inc. Easy-access article of footwear with cord lock
US11589653B2 (en) 2019-11-25 2023-02-28 Nike, Inc. Tension-retaining system for a wearable article
US12402692B2 (en) 2020-07-13 2025-09-02 Nike, Inc. Sole structure with midsole protrusions and arced profile for forward momentum
CN115697121A (zh) * 2020-07-13 2023-02-03 耐克创新有限合伙公司 具有用于向前动量的鞋底夹层突起和弧形轮廓的鞋底结构
USD935157S1 (en) * 2021-01-05 2021-11-09 Jiangsu Vital E-commerce Co., Ltd. Sole
USD939198S1 (en) * 2021-01-05 2021-12-28 Huaian Balu International Trade Co., Ltd Sole
USD1017205S1 (en) * 2021-05-21 2024-03-12 SR Holdings, LLC Footwear sole
USD948188S1 (en) * 2021-06-09 2022-04-12 Nike, Inc. Shoe
USD949536S1 (en) * 2021-06-09 2022-04-26 Nike, Inc. Shoe
USD956406S1 (en) * 2021-07-22 2022-07-05 Nike, Inc. Shoe
US12108834B2 (en) * 2021-11-12 2024-10-08 Nike, Inc. Articles of footwear and other foot-receiving devices having dynamically adjustable heel portions
US20230148708A1 (en) * 2021-11-12 2023-05-18 Nike, Inc. Articles of footwear and other foot-receiving devices having dynamically adjustable heel portions
US20240423324A1 (en) * 2021-11-12 2024-12-26 Nike, Inc. Articles of footwear and other foot-receiving devices having dynamically adjustable heel portions
US12402689B2 (en) 2022-11-28 2025-09-02 Nike, Inc. Footwear with jointed sole structure for ease of access
USD1008624S1 (en) * 2023-03-22 2023-12-26 Nike, Inc. Shoe
USD1008623S1 (en) * 2023-03-22 2023-12-26 Nike, Inc. Shoe
USD1009429S1 (en) * 2023-03-23 2024-01-02 Nike, Inc. Shoe
USD1007121S1 (en) * 2023-03-23 2023-12-12 Nike, Inc. Shoe
USD1005658S1 (en) * 2023-03-23 2023-11-28 Nike, Inc. Shoe
USD1009435S1 (en) * 2023-03-24 2024-01-02 Nike, Inc. Shoe
USD1018002S1 (en) * 2023-04-17 2024-03-19 Skechers U.S.A., Inc. Ii Shoe outsole bottom

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