U.S. patent application number 16/647673 was filed with the patent office on 2020-08-20 for shoe outsole.
The applicant listed for this patent is Tae Hoon LEE AHN. Invention is credited to Tae Hoon AHN, Bum Ho LEE.
Application Number | 20200260818 16/647673 |
Document ID | 20200260818 / US20200260818 |
Family ID | 1000004824210 |
Filed Date | 2020-08-20 |
Patent Application | download [pdf] |
United States Patent
Application |
20200260818 |
Kind Code |
A1 |
AHN; Tae Hoon ; et
al. |
August 20, 2020 |
SHOE OUTSOLE
Abstract
A shoe outsole includes a propulsion strengthening part,
corresponding to the plantar arch of a wearer, between a front end
portion of a sole-corresponding part and a toe-corresponding part,
thereby enabling propulsion to be strengthened. The
toe-corresponding part is formed to be upwardly inclined toward the
front and a heel-corresponding part is formed to be upwardly
inclined toward the back such that a shock absorbing function is
performed and a wearer is helped with a foot moving action, thereby
enabling brisk gait and running and reduced exhaustion of physical
strength of a wearer.
Inventors: |
AHN; Tae Hoon; (Paju-si
Gyeonggi-do, KR) ; LEE; Bum Ho; (Yongin-si
Gyeonggi-do, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
AHN; Tae Hoon
LEE; Bum Ho |
Paju-si Gyeonggi-do
Yongin-si Gyeonggi-do |
|
KR
KR |
|
|
Family ID: |
1000004824210 |
Appl. No.: |
16/647673 |
Filed: |
September 13, 2018 |
PCT Filed: |
September 13, 2018 |
PCT NO: |
PCT/KR2018/010780 |
371 Date: |
March 16, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A43B 13/14 20130101 |
International
Class: |
A43B 13/14 20060101
A43B013/14 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 19, 2017 |
KR |
10-2017-0120341 |
Claims
1. A shoe outsole of a shoe having an outsole and an insole, or a
shoe having an outsole, an insole, and a midsole, the shoe outsole
comprising: a sole-corresponding part corresponding to the foot
sole of a wearer; a toe-corresponding part corresponding to the
toes of a wearer at the front of the sole-corresponding part; a
heel-corresponding part corresponding to the heel of a wearer at
the rear of the sole-corresponding part; and a propulsion
strengthening part corresponding to the plantar arch of a wearer,
being formed with a convex shape in between the front end of the
sole-corresponding part and the rear end of the toe-corresponding
part, and having an area corresponding to the big toe recess lower
than an area corresponding to the little toe recess.
2. The shoe outsole of claim 1, wherein the propulsion
strengthening part is characterized in that the higher surface of
the propulsion strengthening part is convexly embossed and the
lower surface of the propulsion strengthening part is concavely
embossed.
3. The shoe outsole of claim 1, wherein the toe-corresponding part
is characterized in that it is formed upwardly inclined toward the
front.
4. The shoe outsole of claim 1, wherein the heel-corresponding part
is characterized in that it is formed upwardly inclined toward the
rear.
5. The shoe outsole of claim 1, further comprising: a rolling
function part which has a convex top surface being formed along the
centerline passing though a middle portion of the
sole-corresponding part and the toe-corresponding part in the
left-to-right direction.
6. The shoe outsole of claim 5, wherein the rolling function part
is characterized in that the higher surface of the rolling function
part is convexly embossed and the lower surface of the rolling
function part is concavely embossed.
7. The shoe outsole of claim 1, further comprising: a plurality of
shock absorbing functional parts is formed a convex higher surface
and a concave lower surface.
8. The shoe outsole of claim 1, wherein the propulsion
strengthening part is characterized in that the width of a portion
corresponding to the big toe recess is narrower than the width of a
portion corresponding to the little toe recess.
Description
BACKGROUND OF THE INVENTION
Field of the Invention
[0001] The present invention relates to a shoe having an outsole
and an insole, or a shoe having an outsole, an insole and a
midsole. More particularly, the present invention relates to an
outsole of a shoe enhancing propulsive force so as to increase
speed of gait and running by delivering force of a wearer without
slippage; enhancing more propulsive force by using force applied to
the big toe as well as using force applied to the second toe, the
third toe, the fourth toe and the little toe; obtaining
self-sufficient buffering effect without being equipped with
separate shock absorbing means by performing buffering action
through a repeating process of downward elastic deformation and
upward elastic restoration of a toe-corresponding part being formed
upwardly inclined toward the front and a heel-corresponding part
being formed upwardly inclined toward the rear when force such as
the weight of a wearer and other forces are applied; having a
plurality of shock absorbing parts on a sole-corresponding part and
on a heel-corresponding part so as to obtain self-sufficient shock
absorption effect; enabling stable gait and running by preventing
from unbalance causing a fall, an ankle injury and a loss of
propulsive force by gripping the foot in order not to fall when
force delivered by a wearer is offset toward the left or the right;
and achieving efficient fast running by helping the front of an
outsole downwardly inclined toward the ground at the time of
initial contact of fast running by offsetting the center.
Related Art
[0002] The most basic transportation means of human beings is gait
and running.
[0003] Gait and running of a human being means movement of the
center of gravity in terms of physics. In other words, the gait of
a human being is moving the body forward by alternating left and
right legs forward and shifting weight to a front foot in an
orderly manner.
[0004] At the time of gait and running, a flexor muscle group and
an extensor muscle group move countervailingly to each other, the
left leg and the right leg repeating the same movement to each
other, and an upper limb and a lower limb move to the front and to
the rear opposite to each other so as to obtain smooth and
efficient gait.
[0005] The human foot includes a sole 10, toes: a big toe 21, a
second toe 22, a third toe fourth toe 24, and a little toe 25,
having corresponding recess of each toe 31, 32, 33, 34, 35, which
are located in between the sole and the front end of the sole, a
heel 40 being located at the rear.
[0006] One cycle of a gait starts from the initial ground contact
of a heel of a leg, lift up from the ground and then ends at the
moment of contacting the ground again. The cycle of a gait is
further classified as a stance phase (see FIG. 1) wherein a foot
contacts the ground, and a swing phase (see FIG. 2) wherein a foot
is off the ground and a body is propelled forward.
[0007] A stance phase occupies 60% of a cycle while a swing phase
occupies 40% of a cycle.
[0008] A stance phase is further divided into a heel-strike phase,
a foot-flat phase, mid-stance phase, a heel-off phase, and a
toe-off phase (see FIG. 1).
[0009] A heel-strike phase is a period when a heel 40 is contacting
the ground. During the phase, force delivered by a wearer is
concentrated on the heel 40 as shown with dark marking in the first
picture from the left of FIG. 3.
[0010] A foot flat phase is a period when a sole is contacting the
ground which follows the heel striking the ground. In this phase,
force delivered by a wearer is distributed on the heel 40 and a
sole 10 as shown with dark marking in the second picture from the
left of FIG. 3.
[0011] A mid-stance phase is a period when the center of gravity is
passing through the middle of the sole 10 after the sole contacts
the ground. In this phase, force delivered by a wearer is
distributed on the heel 40, a sole 10, and toes (21, 22, 23, 24,
25) as shown with dark marking in the third picture from the left
of FIG. 3.
[0012] A heel-off phase is a period when the heel 40 leaves the
ground following the mid-stance phase. In this phase, force
delivered by a wearer is distributed on the front portion of a sole
10 and toes (21, 22, 23, 24, 25) as shown with dark marking in the
fourth picture from the left of FIG. 3.
[0013] A toe-off phase is a period when toes (21, 22, 23, 24, 25)
leave the ground. In this phase, force delivered by a wearer is
distributed on the big toe 21 side of the front portion of a sole
10 and a big toe 21 as shown with dark marking in the fifth picture
from the left of FIG. 3.
[0014] A heel-strike phase, a foot flat phase, and mid-stance phase
can be regarded as preparatory periods to obtain propulsive force
while a heel-off phase and a toe-off phase can be regarded as
periods to generate propulsive force.
[0015] Especially, the toe-off phase is a very important period for
generating propulsive force since a kicking motion, a motion
pushing the toes to the rear, takes place.
[0016] A swing phase is subdivided into a follow-through, a foot
descent, and a forward swing (see FIG. 2).
[0017] Meanwhile, a running cycle is similar to a gait cycle.
However, the stance phase is subdivided into an initial contact, a
mid-stance, and a propulsion while the swing phase is subdivided
into a follow-through, a forward swing, and foot descent.
[0018] A difference between gait and running is that there is a
double-support phase, with both feet in contact with the ground at
the time of gait; there is a flight phase, with both feet not in
contact with the ground at the time of running.
[0019] For cases of slow running such as jogging or a participation
in a marathon, the stance phase in a running cycle is longer than
the flight phase. As the speed of running is increased, as in the
case of a 100-meter sprint, the stance phase becomes shorter.
[0020] Also, at the time of slow running, a heel contacts the
ground first and the toes contact the ground later, as in the case
of gait; at the time of fast running, a heel and a forefoot contact
the ground right before the toe-off phase almost simultaneously or
the heel descends to the ground during a period of a forefoot
contacting the ground at the beginning until right before the
toe-off phase.
[0021] For case of very fast running, only the forefoot (a front
portion of the sole, and toes) contacts the ground from the initial
contact phase to the propulsion phase.
[0022] It is known that human beings started to wear shoes 21,000
years ago, and thereafter the shoes having various shapes or
functions have been developed persistently.
[0023] Types of shoes are classified depending on their shapes,
materials, usages, and manufacturing methods. Basically, they can
be classified into a shoe having a shoe sole and an upper such as
dress shoes or sports shoes, and a shoe having a shoe sole and a
strap such as slippers.
[0024] Most of a shoe sole is configured to have an outsole,
midsole, and an insole, but it is possible to be configured to have
an outsole and an insole.
[0025] An outsole is a member in contact with the ground; shock
absorption function, light weight, and wear-resistance are required
since it receives shocks directly from the ground; and a material
such as natural rubber and synthetic rubber, foamed vulcanized
rubber, foamed EVA (Ethylene Vinyl Acetate), or polyurethane is
used.
[0026] A midsole is a member attached to the top surface of the
outsole; an anti-twist function and a shock absorption function are
required; and a material such as EVA (Ethylene Vinyl Acetate)
sponge, Phylon, or polyurethane is used.
[0027] An insole is a member attached to the top surface of the
midsole and is in contact with the foot sole; foot protection
function is required; a material such as a latex foam, EVA
(Ethylene Vinyl Acetate) sponge, or polyurethane is used.
[0028] Conventionally, since a toe-corresponding part of an outsole
is flat, slippage between toes and toe-corresponding parts occurs
in the process when a kicking motion, which pushes toes toward the
rear, takes place at the time of the toe-off phase. Due to the
slip, propulsive force is reduced which results in waste of
energy.
[0029] Also, as shown in FIG. 3, even though force exerted by a
wearer is concentrated towards the big toe, the force is exerted to
the second toe, the third toe, the fourth toe, and the little toe
as well. While contact pressure on the toe-corresponding part
incurred by the force exerted to the big toe is strong, contact
pressure on the toe-corresponding part incurred by the force
exerted to the second toe, the third toe, the fourth toe, and the
little toe is weak or almost nothing.
[0030] Accordingly, force exerted to the big toe is used for
propulsion, but force exerted to the second toe, the third toe, the
fourth toe, and the little toe is not used for propulsion.
[0031] Consequently, only a force delivered to the big toe, which
is some portion of the force exerted by a wearer, is used for
propulsion, and force delivered to the second toe, the third toe,
the fourth toe, and the little toe are wasted. Therefore, comparing
with the force exerted, propulsive force is degraded, and energy is
wasted.
[0032] Also, in case of running on a curved section in a track race
or in case of switching directions quickly in ball games, force is
delivered to the inner side or the outer side. At that time, only
the edge of the inner side of the foot or only the edge of the
outer side of the foot strongly butts against the shoe while the
rest portion is floating in the shoe so that lateral- or
medial-side slip occurs. Consequently, it causes not only
degradation of propulsive force but also injury on foot and ankle
of a wearer.
[0033] Especially, the little toe side is under strong pressure
during the process of switching directions quickly in a track race
or a ball game, a slip between a little toe and a toe-corresponding
part occurs, and may cause not only a falling down due to loss of
balance but also serious injury on the little toe portion.
[0034] Also, in general, constructing a shoe with a hard outsole is
effective to enhance propulsive force, and constructing a shoe with
a soft outsole is effective to have a buffering effect.
[0035] Accordingly, a conventional shoe is constructed by combining
these two; adopting a hard outsole integrated with a separate
buffering means such as a buffering rubber or a tubular type
member.
[0036] However, the buffering effect is possibly achieved by the
buffering means, but the effectiveness of a wearer's force
delivered to the ground is degraded.
[0037] Consequently, a conventional shoe has a limit to satisfy
both a function for delivering a wearer's force to the ground and a
function for buffering at the same time.
[0038] Also, fast running comprises a stance phase, which includes
an initial contact, a mid-stance, and a propulsion, and a swing
phase, which includes a follow-through, a forward swing, and foot
descent. At the time of initial contact, when a wearer set a foot
on the ground, the toes contact the lower surface first. For the
case of a conventional outsole, it is not helpful for performing
initial contact movement because the center of gravity is located
in the middle.
[0039] Therefore, it does not provide sufficient stability and
propulsive force for fast running.
[0040] As a prior art, Korean Unexamined Patent No. 10-2011-0040653
(published on Apr. 20, 2011) "Shoe with Anti-Slip Part"
(hereinafter, Prior Art 1) discloses a shoe having an anti-slip
part which is upwardly protruded from the floor surface of an
outsole and corresponds to the recessed area where the toes and the
foot sole are connected.
[0041] The anti-slip part of Prior Art 1 is integrally formed on an
outsole or is installed so as to slide in the longitudinal
direction. Since there is a considerable gap between the toes and
the recessed area, the recessed area does not fully butt against
the anti-slip part, and touches and separates from the anti-slip
part repeatedly so that the anti-slip part can possibly cause pain
at the time of gait and running. Also, proximal phalanges, located
inside of the recessed area between the toes and a sole, are
squashed and cause severe pain.
[0042] Also, for the case of Prior Art 1, the toes are in contact
with the flat plane of the top surface of an outsole so that the
slippage, which occurs between toes and the top surface of the
outsole at the time of gait and running, results in a loss of
propulsive force.
[0043] Furthermore, for the case of Prior Art 1, the toes are in
contact with the flat plane of the top surface of an outsole so
that the foot of the shoe wearer tends to move toward the front at
the time of gait and running. This can cause injury to the toenail
of the shoe wearer.
[0044] On the other hand, Korean Registered Utility Model No.
20-0395056 (registered on Sep. 1, 2005) "Shock Absorbing Outsole"
(hereinafter, Prior Art 2) discloses an insole which is configured
to have a first shock absorbing portion and a second shock
absorbing portion so as to prevent a user from various diseases of
the musculoskeletal system by decreasing load delivered to the
lumbar region and lower limbs with absorbing and distributing a
shock delivered to the foot of a wearer; wherein a first shock
absorbing portion being formed in a region including the location
where the front portion of the metatarsus is contacted on the lower
surface of the insole and the location where the big toe is
contacted, and wherein a second shock absorbing portion being
formed in a region including the location where a heel is
contacted.
[0045] However, since the first and second shock absorbing portions
of Prior Art 2 are protruded from the top surface of the insole,
shock applied to the front portion of the sole which corresponds to
the metatarsus and shock applied to the heel which corresponds to
calcaneus can be attenuated. Therefore, shock attenuation effect is
degraded since shocks applied to the sole and toes except the front
of a sole and the heel are not attenuated, and feeling of fit is
degraded since the toes and the sole with the whole heel are not in
tight contact with the top surface of the insole, resulting in a
gap.
[0046] Also, slippage occurs between the foot of the shoe wearer
and the insole, and the foot of shoe wearer tends to move toward
the front at the time of gait and running as in the case of Prior
Art 1.
DETAILED DESCRIPTION OF THE INVENTION
Technical Solution
[0047] An objective of the present invention is to provide a shoe
outsole which enhances propulsive force and increases speed of gait
and running by delivering a wearer's force to the ground through a
shoe without slip.
[0048] Another objective of the present invention is to provide a
shoe outsole which enhances propulsive force not only by using the
force delivered to the big toe but also by using force delivered to
the second toe, the third toe, the fourth toe, and the little
toe.
[0049] Another objective of the present invention is to provide a
shoe outsole having self-sufficient buffering effect without being
equipped with separate shock absorbing means by performing
buffering action through a repeating process of downward elastic
deformation and upward elastic restoration of a toe-corresponding
part being formed upwardly inclined toward the front and a
heel-corresponding part being formed upwardly inclined toward the
rear when force such as the weight of the foot wearer and other
forces are applied.
[0050] Another objective of the present invention is to provide a
shoe outsole having a plurality of shock absorbing parts on a
sole-corresponding part and on a heel-corresponding part so as to
obtain self-sufficient shock absorption effect.
[0051] Another objective of the present invention is to provide a
shoe outsole enabling stable gait and running by preventing from
unbalance causing a fall, an ankle injury or a loss of propulsive
force by gripping a foot in order not to fall down when force
delivered by a wearer is offset toward the left or the right.
[0052] Another objective of the present invention is to provide a
shoe outsole achieving efficient fast running by helping the front
of an outsole downwardly inclined toward the ground at the time of
initial contact of fast running by offsetting the center.
[0053] In order to achieve the objectives mentioned above, a shoe
having an outsole and an insole, or a shoe having an outsole, an
insole and a midsole includes a sole-corresponding part
corresponding to the foot sole of a wearer, a toe-corresponding
part corresponding to the toes of a wearer at the front of the
sole-corresponding part, a heel-corresponding part corresponding to
the heel of a wearer at the rear of the sole-corresponding part,
and a propulsion strengthening part corresponding to the plantar
arch of a wearer, being formed with a convex shape in between the
front end of the sole-corresponding part and the rear end of the
toe-corresponding part, and having an area corresponding to the big
toe recess lower than an area corresponding to the little toe
recess.
[0054] The propulsion strengthening part is preferably configured
to have the higher surface of the propulsion strengthening part is
convexly embossed and the lower surface of the propulsion
strengthening part is concavely embossed.
[0055] The toe-corresponding part is formed upwardly inclined
toward the front.
[0056] The heel-corresponding part is formed upwardly inclined
toward the rear.
[0057] The rolling function part can be included further which has
a convex top surface being formed along the centerline passing
through a middle portion of the sole-corresponding part and the
toe-corresponding part in the left-to-right direction.
[0058] The rolling function part is preferably configured to have
the higher surface of the propulsion strengthening part convexly
embossed and the lower surface of the propulsion strengthening part
concavely embossed.
[0059] A plurality of shock-absorbing functional parts with the
convex higher surface and the concave lower surface can be further
included.
Advantages of the Invention
[0060] In accordance with a shoe outsole of the present invention,
a propulsion strengthening part is provided between a
sole-corresponding part and a toe-corresponding part so as to
enhance propulsive force for delivering a wearer's force to the
ground sufficiently without slip by the shoe.
[0061] Also, in accordance with a shoe outsole of the present
invention, a propulsion strengthening part is provided between a
sole-corresponding part and a toe-corresponding part that enhances
propulsive force not only by using the force delivered to the big
toe but also by using force delivered to the second toe, the third
toe, the fourth toe, and the little toe.
[0062] Also, in accordance with a shoe outsole of the present
invention, self-sufficient buffering effect without being equipped
with separate shock absorbing means is obtained by performing
buffering action through a repeating process of downward elastic
deformation and upward elastic restoration of a toe-corresponding
part being formed upwardly inclined toward the front and a
heel-corresponding part being formed upwardly inclined toward the
rear when force is applied by a wearer.
[0063] Also, in accordance with a shoe outsole of the present
invention, self-sufficient buffering effect is achieved with a
plurality of shock-absorbing functional parts which is formed in a
heel-corresponding part and repeats downward elastic deformation
and upward elastic restoration depending on the force applied at
the time of gait and running.
[0064] Also, in accordance with a shoe outsole of the present
invention, efficient fast running is achieved by helping the front
of a sole-corresponding part and toe-corresponding part downwardly
inclined toward the ground at the time of initial contact of fast
running by offsetting the center of gravity toward the front of the
sole-corresponding part and the toe-corresponding part.
BRIEF DESCRIPTION OF THE DRAWINGS
[0065] FIG. 1 illustrates a stance phase of a gait cycle.
[0066] FIG. 2 illustrates a swing phase of a gait cycle.
[0067] FIG. 3 illustrates a front view and a bottom view of a leg
in a stance phase.
[0068] FIG. 4 illustrates a side view of a foot.
[0069] FIGS. 5 to 11 illustrate a shoe outsole in accordance with
the preferred embodiment of the present invention.
[0070] FIG. 5 is an isometric view of a shoe outsole in accordance
with the preferred embodiment of the present invention.
[0071] FIG. 6 is a plan view of a shoe outsole in accordance with
the preferred embodiment of the present invention.
[0072] FIG. 7 is a cross-sectional view taken along line A-A of
FIG. 6.
[0073] FIG. 8 is a plan view of the toe-corresponding part and the
propulsion strengthening part.
[0074] FIG. 9 is a cross-sectional view taken along line B-B, line
C-C, line D-D, line E-E and line F-F of FIG. 8.
[0075] FIG. 10 is a plan view of a sole-corresponding part and a
heel-corresponding part.
[0076] FIG. 11 is a cross-sectional view taken along line G-G of
FIG. 10.
DESCRIPTION OF EXEMPLARY EMBODIMENTS
[0077] Hereinafter, a shoe outsole in accordance with a preferred
embodiment of the present invention will be described with
reference to the accompanying drawings.
[0078] To facilitate understanding, the exemplary embodiment
illustrates and describes only an outsole by omitting illustration
and description of an insole and a midsole even though the present
invention can be applied to a shoe including an outsole and an
insole as well as a shoe including an outsole, an insole, and a
midsole.
[0079] In the following, five toes are denoted as the big toe 21,
the second toe 22, the third toe 23, the fourth toe 24, and the
little toe 25 when described individually; denoted as toes 20 when
described collectively. Five recesses between the front end of a
sole 10 and toes 20 are denoted as a big toe recess 31, a second
toe recess 32, a third toe recess 33, a fourth toe recess 34, and a
little toe recess 35 when described individually; they are denoted
as recesses 30 when described collectively.
[0080] FIGS. 4 to 11 illustrate a shoe outsole in accordance with a
preferred embodiment of the present invention. FIGS. 4 to 11
illustrate a shoe outsole for the left foot.
[0081] As illustrated in FIGS. 4 to 11, an outsole OS in accordance
with a preferred embodiment of the present invention has an outline
corresponding to a foot projected to a plane.
[0082] The outsole OS is configured to comprise a
sole-corresponding part 100 being formed in the middle portion to
correspond to the sole 10 of a wearer, a toe-corresponding part 200
being formed at the front end of the sole-corresponding part 100 to
correspond to toes 20 of a wearer, a propulsion strengthening part
300 being formed in between the sole-corresponding part 100 and the
toe-corresponding part 200 with a convex higher surface, and a
heel-corresponding part 400 being formed at the rear end of the
sole-corresponding part 100 to correspond to a heel 40.
[0083] An outsole OS corresponding to a projected area of a foot
can be formed to have an area large enough to cover the marginal
area for binding an upper or a band. An upwardly protruded edge F
is provided on an outline of the outsole OS.
[0084] The sole-corresponding part 100 can be formed as a curve
surface corresponding to the sole 10.
[0085] The toe-corresponding part 200 is configured to make the
toes of a wearer such as the big toe 21, the second toe 22, the
third toe 23, the fourth toe 24 and the little toe 25 butt against
the toe-corresponding part 200 by forming a portion corresponding
to the big toe 21 of a wearer that is lower than a portion
corresponding to the little toe 25 of a wearer.
[0086] Accordingly, the toes of a wearer such as the big toe 21,
the second toe 22, the third toe 23, the fourth toe 24 and the
little toe 25 are in close contact with the toe-corresponding part
200 with uniformly distributed force at the time of gait or running
so that propulsive force applied to an area corresponding to the
big toe 21 of a toe-corresponding part 200 as well as propulsive
force applied to areas corresponding to a second toe 22, a third
toe 23, a fourth toe 24 and a little toe 25 are used for propulsion
in toe-off period of gait cycle and the propulsion period of
running, resulting in reinforcing of propulsive force, enabling
powerful and fast gait or running, and reducing energy
consumption.
[0087] Also, the toe-corresponding part 200 being formed upwardly
inclined toward the front and the heel-corresponding part 400 being
formed upwardly inclined toward the rear are elastically deformed
downward and attenuate shock delivered when the force of a wearer
is applied, and elastically restored upward and act as a force
raising a foot of a wearer resulting in helping to raise the foot
when the force of a wearer is diminished. Thus, brisk gait or
running is enabled, and energy consumption is reduced.
[0088] Since the toe-corresponding part 200 is formed upwardly
inclined toward the front, a phenomenon of pushing a foot of a shoe
wearer forward at the time of gait or running is prevented so that
an injury to a toenail of the shoe wearer can be prevented.
[0089] The propulsion strengthening part 300 can be formed with a
higher surface convex in an upward direction. However, it is
preferable to form a higher surface upwardly convex and a lower
surface downwardly concave in order to reduce weight.
[0090] The propulsion strengthening part 300 is configured to have
the height of the portion corresponding to the big toe recess 31
lower than that of the portion corresponding to the little toe
recess 35 in accordance with the shape of recesses 30 of a wearer
while the width of the portion corresponding to the big toe recess
31 is narrower than that of the portion corresponding to the little
toe recess 35 so as to make the big toe recess 31, the second toe
recess 32, the third toe recess 33, the fourth toe recess 34, and
the little toe recess 35 in close contact with the propulsion
strengthening part 300.
[0091] Accordingly, the toes of a wearer such as the big toe 21,
the second toe 22, the third toe 23, the fourth toe 24 and the
little toe 25 are locked with a propulsion strengthening part 300
during a toe-off period of the gait cycle and the propulsion period
of running, and are not able to slip rearward so that all
propulsive force is transmitted without a loss, and propulsive
force is enhanced. The amount of force enhanced is used for raising
the speed of gait or running, and reduces energy consumption of a
wearer.
[0092] Since the toe-corresponding part 200 is configured to be in
close contact with the big toe 21, the second toe 22, the third toe
23, the fourth toe 24 and the little toe 25; and the propulsion
strengthening part 300 is configured to be in close contact with
the big toe recess 31, the second toe recess 32, the third toe
recess 33, the fourth toe recess 34, and the little toe recess 35,
the little toe recess 35 is in close contact with a
toe-corresponding part 200, and the little toe recess 35 is in
close contact with a propulsion strengthening part 300 even when a
strong force is applied toward the little toe due to ground
condition or circumstances of gait or running so that a wearer
maintains balance or is prevented from suffering an ankle
injury.
[0093] On the other hand, a shoe outsole in accordance with the
exemplary embodiment further includes a rolling functional part 500
having a convex top along a centerline which passes a middle part
of the sole-corresponding part 100 and the heel-corresponding part
400 in the left-to-right direction.
[0094] The rolling functional part 500 can be configured to be
formed with a convex higher surface. However, it is preferable to
form a convex higher surface and a concave lower surface in order
to reduce the weight of an outsole OS.
[0095] The rolling functional part 500 makes a foot roll with
respect to an outsole OS when force eccentric to the left or the
right of the rolling functional part 500 is applied due to ground
surface condition or circumstances of gait or running.
[0096] Accordingly, the left half or the right half of a sole 10
and the heel of a wearer is in tight contact with the left half or
the right half of sole-corresponding part 100 and
heel-corresponding part 400; the rolling functional part 500 holds
a sole 10 and a heel 40 so as to prevent slipping to the right or
to the left. Therefore, a wearer can maintain balance, not suffer
an ankle injury, and avoid a loss of propulsive force so as to
enable stable gait or running.
[0097] In the above case, toes 20 and recesses 30 are in tight
contact with the big toe 21, the second toe 22, the big toe recess
31, and the second toe recess 32 which are located on the left, or
the fourth toe 24, the little toe 25, the fourth toe recess 34, and
the little toe recess 35 which are located on the right are in
close contact with the left half or the right half so that a wearer
can maintain balance, not suffer an ankle injury, and avoid a loss
of propulsive force so as to enable stable gait or running.
[0098] For the case of a soccer shoe application, a plurality of
protruding cleats S as shown in the figures can be formed on a
bottom surface of a shoe outsole OS in accordance with the
preferred embodiment, and various types of bumps and dips or cleats
can be formed depending on the type of application.
[0099] A shoe outsole OS in accordance with a preferred embodiment
further includes a plurality of shock absorbing functional parts
610 formed in a sole-corresponding part 100 and a plurality of
shock absorbing functional parts 620 formed in a heel-corresponding
part 400 (see FIG. 10 and FIG. 11).
[0100] As illustrated, the shock absorbing functional parts 610
formed in a sole-corresponding part 100 are configured to have 4
pairs arranged on the left and on the right, and the shock
absorbing functional parts 620 formed in a heel-corresponding part
400 are configured to have a pair arranged on the left and on the
right. The number of pairs described herein is not limited to the
embodiment and can be increased or decreased depending on the size
of the shoe.
[0101] Also, a cross section of shock-absorbing functional parts
610 formed at the front end of a sole-corresponding part 100 is
shown in FIG. 11, and other shock absorbing functional parts 610,
620 can be considered to have equivalent cross-sectional
shapes.
[0102] The shock absorbing functional parts 610, 620 are configured
to have a concave high surface and a convex low surface.
[0103] The shock absorbing functional parts 610, 620 repeat a
process of downward elastic deformation when the force of a wearer
is applied on a sole-corresponding part 100 and a
heel-corresponding part 400, and upward elastic restoration when
the force of a wearer is diminished. Shock absorption is made
through the process, and shock delivered to a wearer is
minimized.
[0104] On the other hand, the front end of a sole-corresponding
part 100, and a toe-corresponding part 200, and a propulsion
strengthening part 300 hit the ground prior to a heel 40 during
fast running. Unnecessary force can be consumed because a wearer
has to bend the foot downwardly inclined toward the front by
putting force on the ankle.
[0105] In accordance with this embodiment, a shoe outsole is
configured to shift the center of gravity toward the front of a
sole-corresponding part 100 and a toe-corresponding part 200.
[0106] Thus, a wearer avoids force consumption during fast running
by making the front of a sole-corresponding part 100, a
toe-corresponding part 200, and a propulsion strengthening part 300
downwardly inclined without putting force on the ankle.
[0107] In order to configure the center of gravity of an outsole OS
offset toward the front of a sole-corresponding part 100, a
toe-corresponding part 200, and a propulsion strengthening part
300, bumps and dips or cleats formed on the bottom surface are
arranged intensively to the front of a sole-corresponding part 100
and a toe-corresponding part 200.
[0108] The embodiment described above is exemplary, and any person
skilled in the art could make modifications and variations within
the scope of not deviating from intrinsic features of the present
invention. Therefore, the disclosed embodiment is intended not to
limit but to describe the technical idea of the present invention,
and does not limit the technical idea of the present invention in
scope. The protection scope of the present invention should be
interpreted in accordance with the following claims, and all the
technical ideas within the equal scope should be interpreted as
being included in the right scope of the present invention.
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