US20150305437A1 - Midsole for reducing load applied on knee - Google Patents

Midsole for reducing load applied on knee Download PDF

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Publication number
US20150305437A1
US20150305437A1 US14/691,875 US201514691875A US2015305437A1 US 20150305437 A1 US20150305437 A1 US 20150305437A1 US 201514691875 A US201514691875 A US 201514691875A US 2015305437 A1 US2015305437 A1 US 2015305437A1
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US
United States
Prior art keywords
midsole
soft
knee
arch
hardness
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
US14/691,875
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English (en)
Inventor
Tae Sun Kang
Sang Jun Park
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.)
BLACK YAK Co Ltd
DONGJIN LEISURE Co Ltd
Original Assignee
BLACK YAK Co Ltd
DONGJIN LEISURE Co Ltd
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 BLACK YAK Co Ltd, DONGJIN LEISURE Co Ltd filed Critical BLACK YAK Co Ltd
Assigned to DONGJIN LEISURE CO., LTD., BLACK YAK CO., LTD. reassignment DONGJIN LEISURE CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KANG, TAE SUN, PARK, SANG JUN
Publication of US20150305437A1 publication Critical patent/US20150305437A1/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
    • A43B13/38—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
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/12—Soles with several layers of different materials
    • A43B13/125—Soles with several layers of different materials characterised by the midsole or middle layer
    • 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
    • A43B13/141—Soles; Sole-and-heel integral units characterised by the constructive form with a part of the sole being flexible, e.g. permitting articulation or torsion
    • 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
    • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
    • A43B13/18—Resilient soles
    • A43B13/181—Resiliency achieved by the structure of the sole
    • A43B13/186—Differential cushioning region, e.g. cushioning located under the ball of the foot
    • 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
    • A43B13/40—Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process with cushions
    • 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
    • A43B13/41—Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process combined with heel stiffener, toe stiffener, or shank stiffener
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B7/00—Footwear with health or hygienic arrangements
    • A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
    • A43B7/18—Joint supports, e.g. instep supports

Definitions

  • the present invention relates to a midsole which reduces a load applied to a knee, and more particularly, to a midsole which reduces a load applied to a knee, in which a first soft portion and a second soft portion are disposed at a front inner side and a rear inner side so as to allow an inner knee to relatively and smoothly move, thereby reducing impact and load concentrated on an inner knee joint, and expecting improved exercise capacity.
  • a shoe 1 which is generally used, mainly includes a sole 2 , and an upper 3 coupled to an upper portion of the sole 2 .
  • the sole 2 includes an outsole 2 a which is a bottom sole of the shoe, and a midsole 2 b which is an intermediate sole of the shoe.
  • the outsole 2 a is made of a rubber material so as to endure wear resistance and a function of preventing sliding, and the midsole 2 b is often made of a foamed and expanded synthetic resin material so as to form the lightweight shoe 1 by reducing the overall weight of the shoe 1 , absorb impact when impact is applied to the shoe 1 , and provide restoring force.
  • the number of female patients was 36,000 (in 2009), and is seven times more than the number of male patients.
  • the number of male patients of all ages consistently increased over the past five years, while the number of female patients in their thirties or less and seventies or more slowly increased, and the number of female patients in their forties to sixties rapidly increased.
  • the number of patients per 100,000 people by regional groups is 108.2 in Seoul, 97.1 in Busan, and 97.0 in Jeollabuk-do in order of decreasing number, and the number of patients is higher in big cities.
  • Impact is absorbed and thrusting force is created during a process in which a person steps on the ground from the heel to the big toe in accordance with movement of the foot, but in the case of the patients with injuries to the knee, particularly, arthritic patients, movement of adduction applied to an inner knee is increased, which causes damage to inner cartilages.
  • FIG. 8 is a perspective view illustrating a midsole in the related art.
  • Korean Patent No. 10-1075172 discloses a midsole which includes a flex 1 , a heel portion 2 , and a heel cap 3 formed by joining three pieces having different hardness, and the midsole is configured to distribute and absorb impact and load directly applied to a lower side of a heel of a foot, and allow a user to conveniently walk.
  • the aforementioned Korean Patent is excellent in terms of a function of absorbing impact, but does not present a technical configuration regarding a structure for reducing impact and load concentrated on the knee joints in consideration of movement characteristics of the knee joints.
  • Patent Literature 1 Korean Patent Application Laid-Open No. 10-2000-0017890 (Apr. 6, 2000)
  • Patent Literature 2 Korean Patent No. 10-1075172 (Oct. 19, 2011)
  • the present invention has been made in an effort to provide a midsole, in which a first soft portion and a second soft portion are disposed at a front inner side and a rear inner side so as to allow an inner knee to relatively and smoothly move, thereby reducing impact and load concentrated on an inner knee joint, and expecting improved exercise capacity.
  • the present invention has also been made in an effort to provide a midsole which reduces a load applied to a knee, in which inclined surfaces are formed at a soft portion and a hard portion, and the inclined surfaces are joined together, thereby minimizing inconvenience caused by a difference in hardness.
  • the present invention has also been made in an effort to provide a midsole which reduces a load applied to a knee, in which an arch shank, which has greater hardness than a hard portion, is formed at an arch portion, thereby improving functions of distributing and absorbing impact using elastic actions of an arch and a foot arch.
  • An exemplary embodiment of the present invention provides a midsole which reduces a load applied to a knee, the midsole including: a first soft portion which is formed at a front inner side based on an arch portion of a foot; a second soft portion which is formed at a rear inner side based on the arch portion of the foot; and a hard portion which is formed in the remaining region except for the first and second soft portions and in a region of the arch portion of the foot, and has greater hardness than the first and second soft portions.
  • the first soft portion and the second soft portion may have the same hardness.
  • a hardness ratio of the soft portion to the hard portion may be 1:1.1 to 1.6.
  • the soft portion and the hard portion may be joined together while being in direct contact with each other.
  • the soft portion and the hard portion may have inclined cross sections that are vertically joined together, respectively, and a value of hardness in a region where the soft portion and the hard portion are joined together may be between a value of hardness of the soft portions and a value of hardness of the hard portion.
  • An arch shank which has greater hardness than the hard portion, may be installed in a region of the hard portion which corresponds to the arch portion of the foot.
  • the arch shank may be installed in a foot arch region between the first soft portion and the second soft portion.
  • the midsole may be configured to be inserted into an outsole having a bottom portion and a side wall portion.
  • the first soft portion and the second soft portion are disposed at the front inner side and the rear inner side so as to allow an inner knee to relatively and smoothly move, thereby reducing impact and load concentrated on an inner knee joint, and expecting improved exercise capacity.
  • the inclined surfaces are formed at the soft portion and the hard portion, and the inclined surfaces are joined together, thereby minimizing inconvenience caused by a difference in hardness.
  • the arch shank which has greater hardness than the hard portion, is formed at the arch portion, thereby improving functions of distributing and absorbing impact using elastic actions of the arch and the foot arch and reducing a load applied to a knee.
  • FIG. 1 is a top plan view illustrating a first exemplary embodiment of a midsole according to the present invention which reduces a load applied to a knee.
  • FIG. 2 is a cross-sectional view illustrating a second exemplary embodiment of the midsole according to the present invention which reduces a load applied to the knee.
  • FIG. 3 is a cross-sectional view illustrating the second exemplary embodiment of the midsole according to the present invention which reduces a load applied to the knee.
  • FIGS. 4A and 4B are cross-sectional views taken along line B-B, which illustrate a third exemplary embodiment of the midsole according to the present invention which reduces a load applied to the knee.
  • FIGS. 5A and 5B are cross-sectional views taken along line B-B, which illustrate a fourth exemplary embodiment of the midsole according to the present invention which reduces a load applied to the knee.
  • FIG. 6 is a graph illustrating measured values of medial contact force with respect to a stance phase in Examples 1 and 2 and Comparative Example 1.
  • FIG. 7 is a view illustrating a structure of a shoe in the related art.
  • FIG. 8 is a perspective view illustrating a midsole in the related art.
  • FIG. 1 is a top plan view illustrating a first exemplary embodiment of a midsole according to the present invention which reduces a load applied to a knee
  • FIG. 2 is a cross-sectional view taken along line A-A, which illustrates a second exemplary embodiment of the midsole according to the present invention which reduces a load applied to the knee.
  • a midsole 10 which reduces a load applied to a knee, mainly includes a first soft portion 11 , a second soft portion 13 , and a hard portion 15 , and is disposed between an outsole and an insole of a shoe.
  • the midsole 10 which reduces a load applied to the knee, may include the first soft portion 11 which is formed at a front inner side based on an arch portion of a foot, the second soft portion 13 which is formed at a rear inner side based on the arch portion of the foot, and the hard portion 15 which is formed in the remaining region except for the first and second soft portions 11 and 13 and in a region of the arch portion of the foot, and has greater hardness than the first and second soft portions 11 and 13 .
  • the first soft portion 11 and the second soft portion 13 are spaced apart from each other in a forward and rearward direction based on a foot arch region, and formed in an inner region of the foot.
  • the first soft portion 11 is formed in a front inner side region including a big toe portion, and serves to allow the big toe, which creates thrusting force when a user walks or runs, to smoothly move.
  • the second soft portion 13 is formed in a rear inner side region including an inner side of a heel, and serves to absorb load or impact when the user steps on the ground, and to allow the knee to smoothly move.
  • Both of the first soft portion 11 and the second soft portion 13 may be made of the same material, for example, ethylene-vinyl acetate, and may have the same hardness. However, the first soft portion and the second soft portion may be made of different materials as long as the first soft portion and the second soft portion have the same hardness.
  • the hard portion 15 is formed at the arch portion of the foot and at a front outer side and a rear outer side of the arch portion, and is harder than the soft portion, and has greater hardness than the soft portion.
  • a hardness ratio of the soft portion to the hard portion may be 1:1.1 to 1.6.
  • a hardness ratio is higher than the aforementioned range
  • a hardness ratio of the second soft portion to the hard portion is higher than 1:1.6
  • wearing comfort deteriorates due to a difference in hardness, and there is a risk that an ankle portion will be injured when the user steps on the ground.
  • the hardness ratio may be within the aforementioned range.
  • FIG. 3 is a cross-sectional view taken along line A-A, which illustrates the second exemplary embodiment of the midsole according to the present invention which reduces a load applied to the knee.
  • the soft portions 11 and 13 and the hard portion 15 are joined together while being in direct contact with each other, and may be configured to have inclined cross sections 11 a, 15 a, 13 a, and 15 b that are vertically joined together, respectively.
  • the inclined cross sections 11 a and 13 a of the soft portions 11 and 13 may be disposed over the inclined cross sections 15 a and 15 b of the hard portion 15 , and vice versa.
  • the reason why the inclined cross sections are formed at the soft portions and the hard portion and then the inclined cross sections are joined together, as described above, is to prevent heterogeneity caused by a difference in hardness between the soft portions and the hard portion, and minimize deterioration in wearing comfort.
  • the aforementioned configuration allows boundaries between the soft portions and the hard portion to have intermediate hardness values, and serves to prevent the hardness from being rapidly changed in a stepwise manner.
  • FIGS. 4A and 4B are cross-sectional views taken along line B-B, which illustrate a third exemplary embodiment of the midsole according to the present invention which reduces a load applied to the knee.
  • an arch shank 17 which has greater hardness than the hard portion 15 , may be installed in a region of the hard portion 15 which corresponds to the arch portion of the foot, and for example, the arch shank 17 may be joined to a bottom of the hard portion.
  • the arch shank 17 serves to more rigidly support the arch portion of the foot.
  • the first soft portion and the second soft portion are disposed in a region corresponding to the inside of the foot, such that the entirety of the inside region of the foot smoothly moves.
  • a difference in hardness between the first and second soft portions and the hard portion is great, or a separation distance between the first soft portion and the second soft portion is small, there is concern that the region of the arch portion will collapse.
  • the arch shank rigidly supports the arch portion of the foot, thereby allowing the arch portion to smoothly perform inherent functions of distributing weight and absorbing impact.
  • an arch shank 17 a may be formed in a region of the arch portion which corresponds to the foot arch region that is concavely depressed inward, unlike FIG. 4A .
  • the arch shank 17 a may be made of thermoplastic polyurethane (TPU).
  • TPU thermoplastic polyurethane
  • FIGS. 5A and 5B are cross-sectional views taken along line B-B, which illustrate a fourth exemplary embodiment of the midsole according to the present invention which reduces a load applied to the knee.
  • the midsole of the present invention may be configured to be stacked on an outsole 20 as illustrated in FIG. 5A , or may be configured to be inserted into an outsole 20 a having a bottom portion 21 and a side wall portion 22 as illustrated in FIG. 5B .
  • the first soft portion was disposed at the front side
  • the second soft portion was disposed at the rear side
  • the hard portion was disposed in the remaining region except for the first and second soft portions.
  • the midsole was manufactured by joining the first and second soft portions and the hard portion.
  • the first and second soft portions were made of soft EVA
  • the hard portion was made of hard EVA
  • a hardness ratio of the soft portion to the hard portion was 1:1.2.
  • a midsole was manufactured by the same method as in Example 1, except that the hardness ratio of the soft portion to the hard portion was 1:1.3.
  • a midsole was not divided into the first and second soft portions and the hard portion, and the midsole was manufactured by injection-molding hard EVA, which is identical in hardness to the hard EVA of the hard portion of Example 1.
  • FIG. 6 is a graph illustrating measured values of medial contact force with respect to a stance phase in Examples 1 and 2 and Comparative Example 1.
  • the midsole according to the present invention has advantages in that the medial contact force applied to the inside of the foot (shoe) is reduced such that an ankle joint may smoothly move, and movement of adduction applied to the inner knee is minimized, and ultimately, it is possible to prevent cartilage in the knee from being damaged.
  • a midsole was manufactured by the same method as in Example 1, except that cross sections, which are inclined at 45°, were formed at the first and second soft portions and the hard portion, and then joined together.
  • the inclined cross section of the hard portion was disposed over the inclined cross sections of the soft portions.
  • Example 3 an arch shank, which was obtained by injection-molding thermoplastic polyurethane (TPU), was joined to a lower surface of the hard portion. In this case, the arch shank was laterally disposed on the arch portion including the foot arch.
  • TPU thermoplastic polyurethane
  • Example 1 TABLE 1 Division Wearing Comfort Example 1 5.9
  • Example 2 6.0
  • Example 3 6.5
  • Example 4 6.7
  • a level of wearing comfort is high in Examples 1 to 4, and particularly, a level of wearing comfort is significantly high in Examples 3 and 4 in which the inclined surfaces are formed at boundaries between the soft portions and the hard portion, and a level of wearing comfort is highest in Example 4 in which the arch shank is provided.
US14/691,875 2014-04-29 2015-04-21 Midsole for reducing load applied on knee Abandoned US20150305437A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020140051293A KR101423025B1 (ko) 2014-04-29 2014-04-29 무릎 부하를 경감시키는 미드솔
KR10-2014-0051293 2014-04-29

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US (1) US20150305437A1 (ko)
EP (1) EP2939558B1 (ko)
KR (1) KR101423025B1 (ko)
CN (1) CN105011464A (ko)

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US20190116929A1 (en) * 2017-10-23 2019-04-25 Nike, Inc. Drop-in unitary footwear sole with first and second cushioning bodies of differing hardness
US20210137216A1 (en) * 2019-11-07 2021-05-13 Arthur Robert Taylor Shoe sole or insert of a unitary material having a gradual change in hardnesses and/or density characteristics and a method of making the same
US20230371645A1 (en) * 2022-05-20 2023-11-23 Under Armour, Inc. Components for articles and methods of making components from embroidered beads

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DE102013202306B4 (de) 2013-02-13 2014-12-18 Adidas Ag Sohle für einen Schuh
US9930928B2 (en) 2013-02-13 2018-04-03 Adidas Ag Sole for a shoe
US9610746B2 (en) 2013-02-13 2017-04-04 Adidas Ag Methods for manufacturing cushioning elements for sports apparel
DE102013002519B4 (de) 2013-02-13 2016-08-18 Adidas Ag Herstellungsverfahren für Dämpfungselemente für Sportbekleidung
DE102013202291B4 (de) 2013-02-13 2020-06-18 Adidas Ag Dämpfungselement für Sportbekleidung und Schuh mit einem solchen Dämpfungselement
USD740004S1 (en) 2013-04-12 2015-10-06 Adidas Ag Shoe
USD776410S1 (en) 2013-04-12 2017-01-17 Adidas Ag Shoe
DE102014215897B4 (de) * 2014-08-11 2016-12-22 Adidas Ag adistar boost
DE102014216115B4 (de) 2014-08-13 2022-03-31 Adidas Ag Gemeinsam gegossene 3D Elemente
DE102015206486B4 (de) 2015-04-10 2023-06-01 Adidas Ag Schuh, insbesondere Sportschuh, und Verfahren zur Herstellung desselben
DE102015206900B4 (de) 2015-04-16 2023-07-27 Adidas Ag Sportschuh
DE102015209795B4 (de) 2015-05-28 2024-03-21 Adidas Ag Ball und Verfahren zu dessen Herstellung
USD783264S1 (en) 2015-09-15 2017-04-11 Adidas Ag Shoe
USD840137S1 (en) 2016-08-03 2019-02-12 Adidas Ag Shoe midsole
USD840136S1 (en) 2016-08-03 2019-02-12 Adidas Ag Shoe midsole
USD852475S1 (en) 2016-08-17 2019-07-02 Adidas Ag Shoe
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CN106954914A (zh) * 2017-04-25 2017-07-18 福建起步儿童用品有限公司 一种多功能童鞋垫
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Publication number Priority date Publication date Assignee Title
US20190116929A1 (en) * 2017-10-23 2019-04-25 Nike, Inc. Drop-in unitary footwear sole with first and second cushioning bodies of differing hardness
US10932522B2 (en) * 2017-10-23 2021-03-02 Nike, Inc. Drop-in unitary footwear sole with first and second cushioning bodies of differing hardness
US20210137216A1 (en) * 2019-11-07 2021-05-13 Arthur Robert Taylor Shoe sole or insert of a unitary material having a gradual change in hardnesses and/or density characteristics and a method of making the same
US20230371645A1 (en) * 2022-05-20 2023-11-23 Under Armour, Inc. Components for articles and methods of making components from embroidered beads

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EP2939558A1 (en) 2015-11-04
EP2939558B1 (en) 2018-11-07
KR101423025B1 (ko) 2014-07-29
CN105011464A (zh) 2015-11-04

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