U.S. patent application number 13/062813 was filed with the patent office on 2011-12-22 for midsole for a shoe which has the shock-dispersing function and the same foot rolling function.
This patent application is currently assigned to JI ONE FRS CORPORATION. Invention is credited to Gab Ho Lim.
Application Number | 20110308106 13/062813 |
Document ID | / |
Family ID | 40697529 |
Filed Date | 2011-12-22 |
United States Patent
Application |
20110308106 |
Kind Code |
A1 |
Lim; Gab Ho |
December 22, 2011 |
MIDSOLE FOR A SHOE WHICH HAS THE SHOCK-DISPERSING FUNCTION AND THE
SAME FOOT ROLLING FUNCTION
Abstract
Disclosed is a midsole for a shoe which is capable of peacefully
supporting the sole of the foot on which most of the wearer's
weight may be applied, which is capable of performing the
shock-dispersing function and the same foot rolling function, and
which is capable of providing elastic air cushioning and
shock-absorbing effects for relieving foot pressure. The midsole 11
has a shock-absorbing space 12 for providing a cushioning effect in
an underside thereof, the shock-absorbing space 12 extending from a
heel portion to a toe portion of the shoe along an outer periphery
surface of the midsole 11. Cross sectional areas are defined by the
shock-absorbing space 12 increasing from an arch-supporting middle
segment to a heel-supporting rear segment or a toe-supporting front
segment. A plurality of cutaway grooves 18 are formed at a bottom
surface of the midsole 11 along the longitudinal direction of the
midsole 11 at a certain distance. A plurality of ribs 17 protrude
from an upper surface of the midsole 11 within the shock-absorbing
space 12 in such a way as to align the position of the rib 17 with
the position of the cutaway groove 18.
Inventors: |
Lim; Gab Ho; (Busanjin-gu
Busan, KR) |
Assignee: |
JI ONE FRS CORPORATION
Gyeonggi-do
KR
|
Family ID: |
40697529 |
Appl. No.: |
13/062813 |
Filed: |
September 8, 2009 |
PCT Filed: |
September 8, 2009 |
PCT NO: |
PCT/KR09/05069 |
371 Date: |
April 5, 2011 |
Current U.S.
Class: |
36/28 |
Current CPC
Class: |
A43B 7/1435 20130101;
A43B 13/20 20130101; A43B 7/144 20130101; A43B 7/1445 20130101;
A43B 13/181 20130101; A43B 7/142 20130101; A43B 7/1425
20130101 |
Class at
Publication: |
36/28 |
International
Class: |
A43B 13/18 20060101
A43B013/18 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 8, 2008 |
KR |
10-2008-0088150 |
Claims
1. A midsole 11 for a shoe of the type in which it constitutes a
part of a shoe sole 10 and it the wearer's weight while the wearer
is standing still and also during each step while walking or
running, the improvement comprising: the midsole 11 having a
shock-absorbing space 12 for providing a cushioning effect in an
underside thereof; the shock-absorbing space 12 extending from a
heel portion to a toe portion of the shoe along an outer periphery
surface of the midsole 11; and cross sectional areas being defined
by the shock-absorbing space 12 increasing from an arch-supporting
middle segment to a heel-supporting rear segment or a
toe-supporting front segment.
2. The midsole for a shoe as claimed in claim 1, wherein a
plurality of shock-absorbing grooves 16 for providing a cushioning
effect are formed at a bottom surface of the midsole 11 along an
inner periphery of the shock-absorbing space 12.
3. The midsole for a shoe as claimed in claim 1, wherein the
shock-absorbing space 12 is divided into a plurality of
shock-absorbing grooves 16 for providing a cushioning effect.
4. The midsole for a shoe as claimed in claim 2 or 3, wherein the
grooves 16 are vertically oriented as an acute design at a middle
area corresponding to the arch-supporting middle segment of the
midsole 11, and they are vertically oriented as an acute design and
simultaneously slanted at an acute angle at a heel area
corresponding to the heel-supporting rear segment and at a toe area
corresponding to the toe-supporting front segment of the midsole
11.
5. A midsole 11 for a shoe of the type in which it constitutes a
part of a shoe sole 10 and it actthe wearer's weight while the
wearer is standing still and also during each step while walking or
running, the improvement comprising: the midsole 11 having a
shock-absorbing space 12 for providing a cushioning effect in an
upper surface thereof; the shock-absorbing space 12 extending from
a heel portion to a toe portion of the shoe along an outer
periphery surface of the midsole 11; cross sectional areas being
defined by the shock-absorbing space 12 increasing from an
arch-supporting middle segment to a heel-supporting rear segment or
a toe-supporting front segment; a plurality of cutaway grooves 18
being formed at a bottom surface of the midsole 11 along the
longitudinal direction of the midsole 11 at a certain distance; and
a plurality of ribs 17 protruding from an upper surface of the
midsole 11 within the shock-absorbing space 12 in such a way as to
align the position of the rib 17 with the position of the cutaway
groove 18.
6. The midsole for a shoe as claimed in claim 5, wherein the
cutaway grooves 18 are vertically oriented as an acute design at a
middle area corresponding to the arch-supporting middle segment of
the midsole 11, and they are vertically oriented as an acute design
and simultaneously slanted at an acute angle at a heel area
corresponding to the heel-supporting rear segment and at a toe area
corresponding to the toe-supporting front segment of the midsole
11.
Description
TECHNICAL FIELD
[0001] The present invention relates generally to a midsole for a
shoe which is capable of peacefully supporting the sole of the foot
on which most of the wearer's weight may be applied, which is
capable of performing the shock-dispersing function and the same
foot rolling function, and which is capable of providing elastic
air cushioning and shock-absorbing effects for relieving foot
pressure, by defining a sufficient shock-absorbing space in an
underside or an upper surface of the midsole that constitutes a
part of a shoe sole, wherein the shock absorbing space is an
enclosed space extending from a heel portion to a toe portion of
the shoe along an outer periphery surface of the midsole, by
controlling a cross sectional area of the enclosed space in such a
way as to make a middle area corresponding to an arch-supporting
middle segment of the midsole get compressed at a relatively small
compressibility and to make a heel area corresponding to a
heel-supporting rear segment and a toe area corresponding to a
toe-supporting front segment of the midsole get compressed at a
relatively large compressibility, and by making the midsole get
bent as the shape of a curved surface along the longitudinal
direction of the sole of the foot in accordance with a
predetermined walking course of the wearer.
BACKGROUND ART
[0002] Generally, many different types of shoes for protecting feet
of a person have been available in the market. Typically, the most
common type of the shoes was consisted of a sheath for covering and
protecting the top of the foot and the ankle portion of the wearer,
and a sole of the shoe for providing good bottom support, elastic
air cushioning and shock-absorbing effects for relieving foot
pressure.
[0003] In the typical shoes as described above, in order to obtain
shock-absorbing effects for relieving foot pressure, the insoles of
a pair of shoes may be located on an inner bottom surface of the
shoe, which the soles of your feet rest on. Alternatively, the sole
of the shoe and the heel portion of the shoes may be made of a soft
layer such as a rubber or a foaming sponge having excellent
shock-absorbing effects. Alternatively, any elastic member such as
an air bag or a spring can be installed in the sole.
[0004] In a case that the sole of the shoe and the heel portion of
the shoes are made of a rubber or a foaming sponge, or any elastic
member such as an air bag or a spring is installed in the sole as
described above, only shock-absorbing effects for relieving foot
pressure can be obtained. Considering that the heel portion, the
arch-shaped middle portion and the toe portion of the sole may be
touched with the ground in sequence in accordance with a
predetermined walking course of the wearer while walking or
running, then conventional shoe soles to be employed in many
different types of shoes cannot provide the wearer with natural and
efficient walking effects.
[0005] Recently, due to improvement in the standard of living and
the diffusion of the policy of five-day work week, the population
of enjoying outdoor activities will highly expand to come.
Considering the trend of outdoor activities, the shoe manufactures
have developed many different types of functional shoes, which are
capable of providing a person enjoying outdoor activities with good
feelings to wear and which provides resilient, cushioned support
for the sole of the foot, the foot joint and the knee joint of the
wearer, and which distributes the wearer's weight on the feet while
standing, walking or running in such a manner as to promote his or
her comfort and health.
[0006] Anti-slipping function, shock-absorbing function, bad smell
removing function and athlete's foot preventing function due to
operation of the ventilation among the variety of functions which
can be applied to the shoes have been already actively practiced.
In addition, the shoe manufactures have developed many different
types of functional shoes, which are capable of providing the
wearer with shock-absorbing effects in walking and which are
capable of allowing the wearer to efficiently walk in a very
natural way in such a manner that a ball rolls over a plane, which
is so called by the same foot rolling function.
[0007] In view of this, the present applicant has developed a
plurality of inventions related to functional shoes and a device
for aid of walking adapted to be employed thereto, which are
capable of allowing the wearer to perform the same foot rolling
function in a very natural way during the entire walking gait cycle
of the wearer. See for example, Korean Patent No. 10-0560367, which
was filed on Dec. 9, 2005 in Korean Patent Application No.
10-2005-120288, which discloses a device for aid of walking and
shoes employing it therein.
[0008] In this Korean Patent No. 10-0560367, the device for aid of
walking developed by the present applicant comprises heel-shaped
upper and lower bodies, and a plurality of partitions vertically
installed between the upper body and the lower body. The partitions
comprise a main partition, which vertically extends between the
upper body and the lower body at a position that is correspond to
an approximate 3/5.about.4/5 point of the total horizontal
length.
[0009] The partitions further comprise pluralities of first and
second partitions, which are vertically formed between the upper
body and the lower body at a slanted angle of 16.about.20 degrees.
Considering the horizontal direction of the device, these first and
second partitions are positioned at distal end portions of the
upper and the lower bodies on both sides thereof. The slanted angle
of first and second partitions is gradually increased from the main
partition to both sides of the upper and the lower bodies.
Preferably, the slanted angle of first and second partitions is
about 16.about.20 degrees at both distal ends thereof.
[0010] If a user rests his or her weight on the device for aid of
walking of the shoe sole during walking gait cycle of the wearer,
the compressibility of the device is relatively high at both distal
ends thereof. The compressibility of the device in the middle
segment thereof is substantially smaller than in either the rear
segment or the front segment so that the device is softer and much
more readily deformable in the middle segment. Consequently, the
device for aid of walking of the shoe sole may get bent as a
circular arc shape.
[0011] If the device for aid of walking is installed in the heel
portion of the shoe sole or it has function to act as the heel, the
device may be compressed due to the wearer's weight applied on the
shoe sole from the heel portion to the toe portion in accordance
with the walking course of the wearer, so that it can be adapted to
perform the same foot rolling function.
[0012] Accordingly, it is enabled to act as the wearer's weight
while the wearer is standing still and also during each step while
walking or running, so as to provide a shock-absorbing effect
during the entire walking gait cycle of the wearer. In addition, it
is possible to allow the wearer to efficiently walk in a very
natural way so that the knee joint and the ankle of the wearer can
be protected. In addition, it is possible to get rid of foot
fatigue of the wearer.
[0013] However, a drawback of such known device for aid of walking
is that it must be applied to the heel portion of the sole, thereby
resulting in the dissatisfaction of performing the shock-dispersing
function and the same foot rolling function. Although the
conventional device for aid of walking can accomplish the same foot
rolling function at the time that the heel portion of the shoe
begins to be contacted with the ground, it cannot accomplish the
shock-dispersing function and the same foot rolling function at the
time that the arch-supporting middle portion and the toe-supporting
front portion of the midsole are touched with the ground in
sequence and then they are squeezed during walking and the
accompanying rolling of the foot.
[0014] In conclusion, the shoe sole including the device for aid of
walking developed by the present applicant is unable to accomplish
a reasonable and efficient dispersion of wearer's weight and is
unable to provide the same foot rolling function. The rigidity of
the sole bottom is proven a very unsatisfactory characteristic for
wearing and walking and easy to break. Accordingly, it is unable to
allow the wearer to efficiently walk in a natural way so that the
knee joint and the ankle of the wearer cannot be properly protected
and the foot fatigue of the wearer cannot be properly removed. In
addition, the device for aid of walking may be used for a part of
the shoe sole as an individual constitutional element such as the
air bag or the spring. It is self-evident that such situation,
uncomfortable in the manufacturing process, requires multiple
operations so that the overall manufacturing costs are very
high.
DISCLOSURE OF INVENTION
Technical Problem
[0015] In consideration of the above-mentioned disadvantages or
inconveniences of the conventional midsole, a first object of the
present invention is to provide a midsole for a shoe which is
capable of peacefully supporting the sole of the foot on which most
of the wearer's weight may be applied, which is capable of
performing the shock-dispersing function and the same foot rolling
function, and which is capable of getting rid of foot fatigue of
the wearer by defining a sufficient shock-absorbing space in an
underside of the midsole that constitutes a part of a shoe sole,
wherein the shock absorbing space is an enclosed space extending
from a heel portion to a toe portion of the shoe along an outer
periphery surface of the midsole.
[0016] In addition, a second object of the present invention is to
provide a midsole for a shoe which is capable of providing a wearer
with good feelings to wear, which is capable of performing the same
foot rolling function, and which is capable of providing resilient
cushioned support for the sole of the foot, the foot joint and the
knee joint of the wearer, by controlling a cross sectional area of
the shock-absorbing space in such a way as to make a middle area
corresponding to an arch-supporting middle segment of the midsole
get compressed at a relatively small compressibility and to make a
heel area corresponding to a heel-supporting rear segment and a toe
area corresponding to a toe-supporting front segment of the midsole
get compressed at a relatively large compressibility, and by making
the midsole get bent as the shape of a curved surface along the
longitudinal direction of the sole of the foot in accordance with a
predetermined walking course of the wearer.
[0017] In addition, a third object of the present invention is to
provide a midsole for a shoe which is capable of peacefully
supporting the sole of the foot on which most of the wearer's
weight may be applied, which is capable of performing the
shock-dispersing function and the same foot rolling function, and
which is capable of providing an attractive appearance for the shoe
sole, by defining a sufficient shock-absorbing space in an upper
surface of the midsole that constitutes a part of a shoe sole, by
forming a plurality of cutaway grooves at a bottom surface of the
midsole along the longitudinal direction thereof at a certain
distance, and by forming a plurality of ribs protruding from the
upper surface of the midsole within the enclosed space in such a
way as to align the position of the rib with the position of the
cutaway groove and by attaching the bottom sole to the bottom
surface of the midsole except for the region corresponding the
cutaway grooves.
[0018] Finally, a fourth object of the present invention is to
provide a midsole for a shoe which is capable of performing the
same foot rolling function, which is capable of providing an
attractive appearance for the shoe sole, and which is capable of
easily producing functional shoes without employing additional
processes so that a short time occurs to perform the process for
manufacturing the shoe and thereby it has good productivity, and
which gives a considerable reduction in manufacturing costs of the
shoes, by defining a sufficient shock-absorbing space in an upper
surface of the midsole that constitutes a part of a shoe sole, by
forming a plurality of cutaway grooves at a bottom surface of the
midsole along the longitudinal direction thereof at a certain
distance, and by forming a plurality of ribs protruding from the
upper surface of the midsole within the enclosed space in such a
way as to align the position of the rib with the position of the
cutaway groove and by attaching the bottom sole to the bottom
surface of the midsole except for the region corresponding the
cutaway grooves.
Solution to Problem
[0019] In order to achieve the objects, the present invention
provides a midsole for a shoe of the type in which it constitutes a
part of a shoe sole and it the wearer's weight while the wearer is
standing still and also during each step while walking or running,
the improvement comprising:
[0020] the midsole having a shock-absorbing space for providing a
cushioning effect in an underside thereof;
[0021] the shock-absorbing space extending from a heel portion to a
toe portion of the shoe along an outer periphery surface of the
midsole; and
[0022] cross sectional areas being defined by the shock-absorbing
space increasing from an arch-supporting middle segment to a
heel-supporting rear segment or a toe-supporting front segment.
[0023] According to another aspect of the present invention, the
present invention provides a midsole for a shoe of the type in
which it constitutes a part of a shoe sole and it actthe wearer's
weight while the wearer is standing still and also during each step
while walking or running, the improvement comprising:
[0024] the midsole having a shock-absorbing space for providing a
cushioning effect in an upper surface thereof;
[0025] the shock-absorbing space extending from a heel portion to a
toe portion of the shoe along an outer periphery surface of the
midsole;
[0026] cross sectional areas being defined by the shock-absorbing
space increasing from an arch-supporting middle segment to a
heel-supporting rear segment or a toe-supporting front segment;
[0027] a plurality of cutaway grooves being formed at a bottom
surface of the midsole along the longitudinal direction of the
midsole at a certain distance; and
[0028] a plurality of ribs protruding from an upper surface of the
midsole within the shock-absorbing space in such a way as to align
the position of the rib with the position of the cutaway
groove.
Advantageous Effects of Invention
[0029] As described above, in the midsole according to the present
invention, the sole of the foot on which most of the wearer's
weight may be applied in walking can be peacefully supported by the
midsole, which has a sufficient shock-absorbing space in an
underside thereof, wherein the shock absorbing space is an enclosed
space extending from a heel portion to a toe portion of the shoe
along an outer periphery surface of the midsole, and which is
capable of getting rid of foot fatigue of the wearer during the
entire walking gait cycle of the wearer.
[0030] In addition, since the midsole or an insole lying on the
midsole positioned over the total surface of the sole get bent as
the shape of a curved surface along the longitudinal direction of
the sole of the foot in accordance with a predetermined walking
course of the wearer, it is possible to naturally and efficiently
perform the same foot rolling function. Furthermore, it is possible
to provide resilient cushioned support for the sole of the foot,
the foot joint and the knee joint of the wearer and to distribute
the wearer's weight on the feet while standing, walking or running
in such a manner as to promote his or her comfort and health.
[0031] In addition, since a sufficient shock-absorbing space, shock
absorbing grooves, a plurality of cutaway grooves and a plurality
of ribs are formed at the midsole during the manufacturing process
of the midsole to be employed in the shoe, it is possible to easily
produce functional shoes without employing additional processes so
that a short time occurs to perform the process for manufacturing
the shoe and thereby it has good productivity, and which gives a
considerable reduction in manufacturing costs of the shoes.
[0032] Finally, since a plurality of cutaway grooves are formed at
a bottom surface of the midsole along the longitudinal direction
thereof at a certain distance and a bottom sole is attached to the
bottom surface of the midsole except for the regions corresponding
the cutaway grooves, the cutaway grooves can be exposed to the
outside through the side portion and the bottom portion of the shoe
sole, and thereby resulting in an attractive appearance for the
shoe sole.
BRIEF DESCRIPTION OF DRAWINGS
[0033] The above object and other characteristics and advantages of
the present invention will become more apparent by describing in
detail preferred embodiments thereof with reference to the attached
drawings, in which:
[0034] FIG. 1 is an exploded perspective view of a shoe sole
according to the preferred embodiment of the present invention,
which has a midsole capable of providing a shock-absorbing effect
and the same foot rolling function during the entire walking gait
cycle of the wearer;
[0035] FIGS. 2A and 2B are rear side perspective views of the
midsole according to another embodiment of the present
invention;
[0036] FIG. 3 is a rear side view of the midsole according to the
present invention;
[0037] FIG. 4A is a sectional view taken along line "A-A" shown in
FIG. 3;
[0038] FIG. 4B is a sectional view taken along line "B-B" shown in
FIG. 3;
[0039] FIG. 4C is a sectional view taken along line "C-C" shown in
FIG. 3;
[0040] FIG. 5 is a side sectional view of the midsole according to
the present invention;
[0041] FIG. 6 is a perspective view of a midsole according to
another embodiment of the present invention; and
[0042] FIG. 7 is a side sectional view according to another
embodiment of the present invention.
BEST MODE FOR CARRYING OUT THE INVENTION
[0043] Hereinafter, the constitution and the operation of midsoles
according to the preferred embodiments of the present invention
will be explained in more detail with reference to the accompanying
drawings FIGS. 1 to 7.
[0044] Prior to proceeding to the more detailed description of the
preferred embodiments according to the present invention, it should
be noted that, for the sake of clarity and understanding of the
invention identical components which have identical functions have
been identified with identical reference numerals throughout the
different views which are illustrated in each of the attached
drawing Figures.
[0045] As will be best seen in FIG. 1, a midsole 11 according to
the present invention is a part of a shoe sole 10 having an out
sole 13 of which non-slip surfaces 14 are provided over the total
bottom surface of the out sole 13. The midsole 11 for elastically
supporting the wearer's weight is preferably formed of a natural
rubber, a synthetic rubber or a foamed, resilient material, such as
polyurethane, polypropylene or other suitable materials.
[0046] The midsole 11 according to the present invention has a
shock-absorbing space 12 for providing a cushioning effect, which
is formed in an underside thereof. The shock-absorbing space 12
having a predetermined depth extends from a heel portion to a toe
portion along an outer periphery surface of the shoe of the
foot.
[0047] As best seen in FIGS. 1 and 3, typically, the shoe sole has
a heel-supporting rear segment, an arch-supporting middle segment
and a toe-supporting segment. In the shoe sole, cross sectional
areas defined by the enclosed space 12 are gradually increased from
the arch-supporting middle segment to the heel-supporting rear
segment or the toe-supporting front segment. Preferably, the depth
of the enclosed space 12 may be maintained within the range of
about 1/2.about.2/3 of total thickness of the midsole 11.
[0048] Due to the existence of the shock-absorbing space 12, the
substantial volume of the midsole 11 decreases along a curved line
"P" as illustrated in FIG. 3, which is used to represent the change
of the wearer's weight transferred from the heel portion of the toe
portion during the entire walking gait cycle of the wearer. In
other words, the force for supporting the wearer's weight fulfilled
by the midsole 11 decreases at the position on which the enclosed
space 12 is provided in the midsole 1.
[0049] As result, the compressibility of the midsole 11 may be
changed in accordance with the portions corresponding to the
heel-supporting rear segment, the arch-supporting middle segment or
the toe-supporting front segment in the enclosed space 12. If the
wearer's weight is not applied thereto, the compressed and
transformed midsole 11 return to its initial state.
[0050] Referring to FIGS. 4A to 4C, if the wearer's weight is
applied to the shoe sole along the curved line "P" representing the
change of the wearer's weight, the compressibility of the midsole
11 is relatively large at the heel portion and the toe portion and
it tends to decrease from the heel portion or the toe portion to
the arch-supporting middle segment during the entire walking gait
cycle of the wearer. The transform's profile of the compressibility
of the midsole 11 comprises an arc-shaped profile, which is adapted
to perform the same foot rolling function, in accordance with the
curved line "P".
[0051] As shown in FIG. 2A, a plurality of shock-absorbing grooves
16 for providing a cushioning effect are formed at a bottom surface
of the midsole 11 along an inner periphery of the shock-absorbing
space 12. Alternatively, as shown in FIG. 2B, the shock-absorbing
space 12 can be divided into a plurality of shock-absorbing grooves
16 for providing a cushioning effect. Preferably, the
shock-absorbing groove 16 comprises a circular groove.
[0052] It will be understood by those skilled in the art that
various changes may be made for the shape of shock-absorbing groove
16 without departing from the scope of the invention. In other
words, the shock-absorbing groove 16 can be formed as a triangle
shape, a rectangular shape, an oval shape, an elongated groove and
so on. In addition, many modifications for cross sectional areas of
the shock-absorbing space 12 or the shock-absorbing groove 16 may
be made to adapt a particular situation or material to the
teachings of the invention with considering the thickness and the
compressibility of the midsole 11.
TABLE-US-00001 TABLE 1 Cross sectional area of the shock-absorbing
space or the shock-absorbing grooves along the sole of the foot the
sole of the foot (midsole) the toe portion the arch-supporting the
heel portion 1/3 1/3 1/3 middle portion 1/2 1/2 50~80% 30~50%
10~30% 0~10% 20~50% 50~80%
[0053] According to the table 1, since the length of the toe
portion is larger than that of the heel portion in the longitudinal
direction, the sectional area of the toe portion is divided into
three segments and the sectional area of the heel portion is
divided into two segments, thereby individual unit sectional area
becomes uniform.
[0054] Since the thickness of the midsole 11 is gradually increased
from the arch-supporting middle portion to the heel portion and
decreases from the arch-supporting middle portion to the toe
portion, the sectional areas of the shock-absorbing space 12 or the
shock-absorbing groove 16 have a relatively small deviation at the
toe portion and have a relatively large deviation at the heel
portion.
[0055] While one representative aspect according to the present
invention has been described with reference to the Table 1, it will
be understood by those skilled in the art that various changes can
be made without departing from the scope of the invention.
Therefore, it is intended that the invention not be limited to the
numeral ranges illustrated in Table 1.
[0056] In addition, many modifications for sectional areas and the
depth of the shock-absorbing space 12 or the shock-absorbing groove
16 can be made by a manufacturer with considering the material and
the elasticity of the midsole 11 and the thickness of certain zone
in the midsole 11 without departing from the essential scope
thereof.
[0057] Now referring to FIG. 5, when the shock-absorbing grooves 16
are formed at the midsole 11 for the purpose of providing
shock-absorbing effects, they may be vertically oriented as an
acute design at a middle area corresponding to the arch-supporting
middle segment of the midsole 11. Alternatively, the
shock-absorbing grooves 16 may be vertically oriented as an acute
design and simultaneously slanted at an acute angle at a heel area
corresponding to the heel-supporting rear segment and at a toe area
corresponding to the toe-supporting front segment of the midsole
11.
[0058] Although the shock-absorbing grooves 16 are formed in such a
manner as to be slanted relative to the midsole 11 at a heel area
corresponding to the heel-supporting rear segment and at a toe area
corresponding to the toe-supporting front segment of the midsole 11
and the numbers and the sectional areas of the grooves 16 are set
at a relatively small value, it is enable to obtain a preferred
compressibility of the midsole 11, which is sufficient to perform
the same foot rolling function. Preferably, the slanted angle of
the shock-absorbing grooves 16 may be maintained within the range
from 16 to 20 degrees, which is correspond to an angle between the
foot of the wearer and the ground in walking.
[0059] Meanwhile, FIGS. 6 and 7 show a midsole 11 according to
another embodiment of the present invention.
[0060] Referring to FIGS. 6 and 7, the midsole 11 has a
shock-absorbing space 12 for providing a cushioning effect in an
upper surface thereof. A plurality of cutaway grooves 18 are formed
at a bottom surface of the midsole 11 along the longitudinal
direction thereof at a certain distance. A plurality of ribs 17
protrude from the upper surface of the midsole 11 within the
shock-absorbing space 12 in such a way as to align the position of
the rib 17 with the position of the cutaway groove 18.
[0061] In other words, the shock-absorbing space 12 may be applied
to the upper surface of the midsole 11. Since an insole (not shown)
to cover the upper surface of the midsole 11 is strongly supported
by the ribs 17, it is enable to perform the shock-dispersing
function and the same foot rolling function due to operation of the
shock-absorbing space 12 as described above without making the
wearer to have trouble to walk.
[0062] As shown in FIG. 7, the ribs 17 are located at predetermined
positions within the shock-absorbing space 12 on the upper surface
of the midsole 11 in a manner to positionally correspond to the
cutaway grooves 18 formed at the bottom surface of the midsole 11
at a certain distance, so that the cutaway grooves 18 may be formed
as a uniform shape of groove.
[0063] Due to formation of the cutaway grooves 18 at the bottom
surface of the midsole 11, the shoe sole 10 may be easily curved
along the walking course of the wearer during the entire walking
gait cycle of the wearer. Since the cutaway grooves 18 can be
exposed to the outside through the side portion and the bottom
portion of the shoe sole 10, the operation of the midsole 11 may
have influence to the ground through the shoe sole 10. Due to this
structure, the shoe sole 10 employing the midsole 11 according to
the present invention can have an attractive appearance and thereby
a consumer can easily recognize the structure of the shoe sole
10.
[0064] As shown in FIG. 7, a plurality of out soles 13 are attached
to the bottom surface of the shoe sole 10 except for the regions
corresponding to the cutaway grooves 18. Alternatively, one piece
of out sole 13 can be applied to the bottom surface of the shoe
sole 10 in such a manner that the midsole 11 has the
shock-absorbing space 12 and the ribs 17 without having the cutaway
grooves 18.
[0065] The position and the structure of the cutaway grooves 18 has
a basic structure which is constituted as the same manner as the
grooves 16 as described above. In detail, at a middle area
corresponding to the arch-supporting middle segment of the midsole
11 or in the vicinity thereof, the cutaway grooves 18 are formed at
a bottom surface of the midsole 11 in such a manner that they are
perpendicular to the midsole 11.
[0066] At a heel area corresponding to the heel-supporting rear
segment and a toe area corresponding to the toe-supporting front
segment of the midsole 11, the cutaway grooves 18 are formed at the
bottom surface of the midsole 11 in such a manner that they are
vertically oriented as an acute design and simultaneously slanted
at an acute angle relative to the midsole 11. Preferably, the ribs
17 are formed at the upper surface of the midsole 11 in a manner to
positionally correspond to the cutaway grooves 18.
[0067] If the midsole 11 according to the present invention is
applied to the shoe sole 10, the sole of the foot to which the
wearer's weight may be substantially applied during the entire
walking gait cycle of the wearer is more peacefully supported by
the enclosed space 12 or the grooves 16. Accordingly, it is enable
to relieve fatigue that is applied to the sole of the foot in
walking.
[0068] When the wearer walks with wearing the shoe sole 10 of which
the midsole 11 according to the present invention is employed
thereto, he or she can perform the same foot rolling function due
to operation of the enclosed space 12 and the grooves 16.
[0069] In detail, a heel area corresponding to the heel-supporting
rear segment may be touched with the ground and then a middle area
corresponding to the arch-supporting middle segment of the midsole
11 may be touched with the ground during the entire walking gait
cycle of the wearer. Thereafter, a toe area corresponding to the
toe-supporting front segment of the midsole 11 may be touched with
the ground, at the same time, the heel portion leaves the ground
during the entire walking gait cycle of the wearer. Consequently,
the wearer can walk with accomplishing the same foot rolling
function during walking gait cycle of the wearer.
[0070] Accordingly, it is enable to provide a person enjoying
outdoor activities with good feelings to wear by putting on the
shoe employing the midsole 11 according to the present invention,
which provides resilient, cushioned support for the sole of the
foot, the foot joint and the knee joint of the wearer, and which
can distribute the wearer's weight on the feet while standing,
walking or running in such a manner as to promote his or her
comfort and health.
[0071] With respect to the afore-mentioned problem that the device
for aid of walking or the air bag or the spring are manufactured as
separate constitutional parts and thereafter they are incorporated
into the shoe sole at a late date, the midsole 11 is formed as a
one-piece, integral, molded body of relatively soft, deformable and
resilient material having rubber-like characteristics in a manner
that the shock-absorbing space 12, the shock-absorbing grooves 16,
the cutaway grooves 18 and the ribs 17 are easily provided therein
during the formation of the midsole 11. Accordingly, a short time
occurs to perform the process for manufacturing a functional shoe
capable of accomplishing the same foot rolling function, which
gives a considerable reduction in costs.
[0072] The reference numeral "15" (shown in FIG. 1) represents an
edge portion for the purpose of inserting the midsole 11 into the
bottom sole 13 so that the midsole 11 can be integrally sealed with
the shoe sheath. It will be understood by those skilled in the art
that various changes may be made for the appearance of the midsole
11 and the bottom sole 13 without departing from the scope of the
invention.
[0073] While the invention has been described with reference to a
preferred embodiment, it will be understood by those skilled in the
art that various changes may be made and equivalents may be
substituted for elements thereof without departing from the scope
of the invention. In addition, many modifications may be made to
adapt a particular situation or material to the teachings of the
invention without departing from the essential scope thereof.
[0074] Therefore, it is intended that the invention not be limited
to the particular embodiment disclosed as the best mode
contemplated for carrying out this invention, but that the
invention will include all embodiments falling within the scope of
the appended claims.
INDUSTRIAL APPLICABILITY
[0075] The present invention could be applicable to many different
types of shoes for protecting feet of a person have been available
in the market.
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