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

Definitions

• the present invention relates to footwear.
• the toe spring function causes the toes to be used less when walking or running, which may result in a deterioration of the biomechanical characteristics of the foot.
• An object of the present invention is to provide footwear that can solve the above-mentioned problems of the conventional art and suppress the deterioration of the biomechanical characteristics of the foot.
• the third bottom 15 includes a ball bottom 40, and a first support protrusion (protrusion) 51 that protrudes downward is formed on the ball bottom 40.
• a first support protrusion (protrusion) 51 that protrudes downward is formed on the ball bottom 40.
• the ball bottom 40 corresponds to the front part of the third bottom 15, and corresponds to the part on which the ball of the big toe and the ball of the little toe of the foot rest. Note that the ball of the big toe and the ball of the little toe of the foot are omitted from the illustration.
• the first support protrusion 51 is formed as an integral part on the back surface of the outsole 50. As shown by the dashed line in Fig.
• the outsole 50 has a second support protrusion 52 that protrudes downward from the heel bottom 55, which corresponds to the part on which the heel of the foot rests.
• the second support protrusion 52 is formed as a single piece on the back surface of the outsole 50.
• a midsole 60 is placed on the surface of the outsole 50.
• the midsole 60 has a toe-equivalent portion cut off, and when the midsole 60 is placed on the outsole 50, the surfaces of the soles 50, 60 become flush with each other.
• a plurality of grooves 61 extending in the width direction of the footwear 1 and recessed downward are formed on the surfaces of the outsole 50 and the midsole 60 from the front end to between the first support protrusions 51.
• the provision of the grooves 61 reduces the rigidity of the first bottom 10, making it easier to bend.
• the grooves 61 are composed of an inner groove 62 formed on the inside in the width direction, and an outer groove 63 formed from the center to the outside in the width direction. In this embodiment, the inner groove 62 is formed in two stripes, and the outer groove 63 is formed in three stripes.
• a biasing member 100 is disposed on the surface of the sole 3.
• a material having excellent bending strength and rigidity is used for the biasing member 100.
• the biasing member 100 is made of carbon and is formed of a band-shaped plate material.
• the biasing member 100 is formed into a shape that follows the internal contour of the sole 3, and as shown in Figure 5, has a first portion 100a that covers the area from the ball of the foot bottom 40 to the first sole 10 on the toe side, and a second portion 100b that is continuous with the rear end of the first portion 100a.
• the second portion 100b covers the rear region of the ball of the foot bottom 40.
• the second portion 100b covers only a middle portion of the sole 3 in the width direction.
• the first portion 100a extends across the entire width of the sole 3, and the second portion 100b is formed to be narrower than the first portion 100a.
• the footwear 1 is an arch-shaped footwear in which the first sole 10 and the second sole 20 are in contact with the ground and the third sole 15 is in a floating state, as shown in FIG. 6.
• the footwear 1 is in a substantially flat state in which the first sole 10 on the toe side is floating while the first support convex portion 51 and the second support convex portion 52 are in contact with the ground.
• This state corresponds to the "middle stance phase.”
• the heel of the wearer's foot applies pressure to the second support convex portion 52, the ball of the big toe and the ball of the little toe apply pressure to the first support convex portion 51, and the toes are in a free state.
• the second support protrusion 52 on the heel side moves away from the ground surface, a load is applied to the toe side of the footwear 1, and the first bottom 10 and the first support protrusion 51 on the toe side come into contact with the ground.
• the footwear 1 deforms into an inverted arch shape and transitions from the middle stance phase to the late stance phase.
• the first support protrusion 51 and the second support protrusion 52 on the heel side move even further away from the ground surface, while the first bottom 10 on the toe side remains in contact with the ground.
• the toe leaves the ground (not shown in the figure). This state corresponds to the "final stance phase.”
• the first support convex portion 51 and the second support convex portion 52 on the heel side are largely separated from the ground surface, so that the weight is no longer applied to the first support convex portion 51 and the second support convex portion 52, and a restoring force to the state shown in Fig. 6 is applied to the sole 3, providing a forward propulsive force to the foot.
• a sole restoring force is applied to the sole 3 by the biasing member 100, providing a further forward propulsive force.
• the biasing member 100 is supported by the sole 3 of the footwear 1.
• the biasing member 100 changes shape in accordance with the stance phase, similar to the footwear 1, and a biasing force is applied when the biasing member 100 returns to its original shape, thereby providing the foot with a forward propulsive force.
• the second form is the form when the footwear 1 is worn.
• the sole 3 is in a substantially flat state
• the first support convex portion 51 and the second support convex portion 52 are in contact with the ground
• the first bottom portion 10 and the third bottom portion on the toe side are in a floating state.
• the footwear 1 and the biasing member 100 are in a substantially flat shape.
• the third form is the form when walking begins.
• the first bottom 10 on the toe side and a part of the first support protrusion 51 are in contact with the ground, and the second support protrusion 52 on the heel side is separated from the ground surface.
• the footwear 1 and the biasing member 100 are shaped to extend upward and to the rear, forming an inverted arch shape.
• the fourth form is the form when walking has progressed further.
• the first bottom part 10 on the toe side and the first support protrusion 51 are in contact with the ground, and the second bottom part 20 on the heel side is farther away from the ground than in the state shown in FIG. 8. In other words, it has a more curved inverted arch shape than the third form.
• the rigidity and flexibility of the sole 3 are set so that the sole 3 can deform to follow the first to fourth forms when walking while wearing the footwear 1.
• the sole 3 of the footwear 1 has the first bottom 10 and the second bottom 20 that are substantially flush with each other, and the third bottom 15 has an upwardly convex curved shape. Therefore, when the footwear 1 is worn, as shown in FIG. 7, when the first support convex portion 51 touches the ground, the first bottom 10 on the toe side is slightly raised, leaving the toes free.
• the biasing member 100 comprises a first part 100a covering the entire area from the ball of the toe bottom portion 40 to the first bottom portion 10 on the toe side, and a second part 100b that is continuous with the rear end portion of the first part 100a and covers the bottom area located behind the ball of the toe bottom portion 40 of the sole 3, and the second part 100b covers only the middle portion in the width direction of the sole 3.
• the rear end of the second portion 100b terminates short of the heel bottom portion of the sole 3 that supports the heel. According to this configuration, by providing the biasing member 100 from the tip of the toe part of the sole 3 to the heel part, the reaction force from the biasing member 100 can be obtained as a forward propulsion force, and the footwear 1 can be provided in which the wearer does not get tired even when walking for a long time.
• the outsole 50 and the midsole 60 are provided as separate bodies to form the sole 3, but the outsole 50 and the midsole 60 may be formed as a single body.
• the insole 70 may be formed as a single body, or the insole 70 and the midsole 60 may be formed as a single body.
• the biasing member 100 is attached to the upper part of the midsole 60.
• the biasing member 100 of the sole 3 is omitted.
• Other configurations are the same as those of embodiment 1 shown in Figures 1 to 8. Note that embodiment 2 will be described below with reference to Figures 6 to 8.
• the toes are free, they are able to grip the ground when starting to walk, which helps prevent a decline in the biomechanical properties of the foot.
• the second support convex portion 52 on the heel side moves away from the ground surface, placing a load on the toe side of the footwear 1, and the first bottom portion 10 and first support convex portion 51 on the toe side touching the ground.
• the footwear 1 deforms into an inverted arch shape and transitions from the middle stance phase to the late stance phase.
• the first support convex portion 51 and the second support convex portion 52 on the heel side move even further away from the ground surface, while the first bottom portion 10 on the toe side remains in contact with the ground.

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• Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

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• 2024
  • 2024-01-16 JP JP2024521331A patent/JP7500125B1/ja active Active
  • 2024-01-16 WO PCT/JP2024/001000 patent/WO2025154177A1/ja active Pending
  • 2024-07-11 TW TW113126050A patent/TWI900123B/zh active

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