U.S. patent application number 11/713245 was filed with the patent office on 2007-12-27 for shoe sole.
Invention is credited to Kwang seop Moon, Jeung hyun Ryu.
Application Number | 20070294915 11/713245 |
Document ID | / |
Family ID | 37620918 |
Filed Date | 2007-12-27 |
United States Patent
Application |
20070294915 |
Kind Code |
A1 |
Ryu; Jeung hyun ; et
al. |
December 27, 2007 |
Shoe sole
Abstract
Disclosed is a shoe sole having an upwardly sloped front side
and an upwardly rear side so that it has a substantially
arch-shaped bottom surface, in which a middle sole made of a rigid
material is embedded in an outsole. A non-slip sole is attached
over the total bottom surface of the outsole. An arch-shaped groove
is formed at a center portion of the bottom surface of the outsole.
An elliptical stamping cushion is installed in the arch-shaped
groove and it is made of a material that is a softer than the
outsole. The middle shoe is rounded at a substantially arch shape
such that it is corresponding to the shape of the outsole. A
rib-shaped reinforcing portion is provided at a middle portion of
the middle sole. An uneven surface is provided on an upper surface
and a lower surface of the middle sole, respectively. A plurality
of through holes are formed through the middle sole and a plurality
of cut-away portions are formed at positions of the front side of
the middle sole, thereby forming resilient supporting portions.
Inventors: |
Ryu; Jeung hyun; (Busan,
KR) ; Moon; Kwang seop; (Busan, KR) |
Correspondence
Address: |
JORDAN AND HAMBURG LLP
122 EAST 42ND STREET, SUITE 4000
NEW YORK
NY
10168
US
|
Family ID: |
37620918 |
Appl. No.: |
11/713245 |
Filed: |
March 2, 2007 |
Current U.S.
Class: |
36/28 |
Current CPC
Class: |
A43B 13/12 20130101;
A43B 13/026 20130101; A43B 17/107 20130101; A43B 13/145 20130101;
A43B 13/183 20130101; A43B 13/141 20130101 |
Class at
Publication: |
36/28 |
International
Class: |
A43B 13/18 20060101
A43B013/18 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 21, 2006 |
KR |
10-2006-0055836 |
Claims
1. A shoe sole comprising an outsole having a front side and a rear
side of a bottom surface thereof, which are sloped upwards, a
middle sole being made of a rigid material and being installed in
the outsole, and a non-slip sole being attached over the total
bottom surface of the outsole, wherein an arch-shaped groove is
formed at a center portion of the bottom surface of the outsole, an
elliptical stamping cushion is installed in the arch-shaped groove,
the stamping cushion being made of a material that is a softer than
the outsole, the non-slip sole is attached over the total bottom
surface of the outsole and an exposed surface of the stamping
cushion and the shoe sole further comprises a waterproof cover
attached to an outer surface of the stamping cushion.
2. A shoe sole according to claim 1, wherein the middle sole is
rounded at a substantially arch shape such that it is corresponding
to the shape of the outsole, the thickness of a front end of the
middle sole is smaller than the thickness of other portions
thereof, a rib-shaped reinforcing portion is provided at a middle
portion of the middle sole, an uneven surface is provided on an
upper surface and a lower surface of the middle sole, respectively,
a plurality of through holes are formed through the middle sole and
a plurality of cut-away portions are formed at positions of the
front side of the middle sole, which are corresponding to the toe,
thereby forming resilient supporting portions.
3. A shoe sole according to claim 1, further comprising a pair of
plate springs that are made of an elastic metal plate and are
disposed in the stamping cushion in such a manner that the plate
springs are opposite to each other, each the plate spring having a
circular-shaped tension portion and resilient portions, which are
integrally formed with each other, one end of the resilient portion
being integrally connected with one side of the circular-shaped
tension portion, respectively, a space between the resilient
portions thereby being widened, a support pin being inserted into
an opening of the circular-shaped tension portion, a reinforcing
portion being situated on an outer surface of the resilient portion
in a cylindrical embossing pattern thereon, respectively, thereby
forming an X-shaped pattern, at positions adjacent to the
reinforcing portion, a plurality of through holes being formed
through the resilient portion, and a rounded portion being formed
at a free end of the resilient portion, respectively.
4. A shoe sole according to claim 2, further comprising a pair of
plate springs that are made of an elastic metal plate and are
disposed in the stamping cushion in such a manner that the plate
springs are opposite to each other, each the plate spring having a
circular-shaped tension portion and resilient portions, which are
integrally formed with each other, one end of the resilient portion
being integrally connected with one side of the circular-shaped
tension portion, respectively, a space between the resilient
portions thereby being widened, a support pin being inserted into
an opening of the circular-shaped tension portion, in a reinforcing
portion being situated on an outer surface of the resilient portion
in a cylindrical embossing pattern thereon, respectively, thereby
forming an X-shaped pattern, at positions adjacent to the
reinforcing portion, a plurality of through holes being formed
through the resilient portion, and a rounded portion being formed
at a free end of the resilient portion, respectively.
5. A shoe sole according to claim 1, further comprising a pair of
plate springs that are made of a metal plate and are disposed in
the stamping cushion in such a manner that the plate springs are
opposite to each other, in the plate spring having circular-shaped
tension portions and rounded resilient portions, which are
integrally formed with each other, both ends of the resilient
portion being integrally connected with one side of the
circular-shaped tension portion, respectively, the resilient
portion extending between the circular-shaped tension portions, the
resilient portion being radially outwardly rounded between the
circular-shaped tension portions, a space between the resilient
portions thereby being widened, a reinforcing portion being
situated on an outer surface of the resilient portion in a
cylindrical embossing pattern thereon, respectively, thereby
forming an X-shaped pattern, in which at positions adjacent to the
reinforcing portion, a plurality of through holes are formed
through the resilient portion.
6. A shoe sole according to claim 2, further comprising a pair of
plate springs that are made of a metal plate and are disposed in
the stamping cushion in such a manner that the plate springs are
opposite to each other, the plate spring having circular-shaped
tension portions and rounded resilient portions, which are
integrally formed with each other, both ends of the resilient
portion being integrally connected with one side of the
circular-shaped tension portion, respectively, the resilient
portion extending between the circular-shaped tension portions, the
resilient portion being radially outwardly rounded between the
circular-shaped tension portions, a space between the resilient
portions thereby being widened, a reinforcing portion being
situated on an outer surface of the resilient portion in a
cylindrical embossing pattern thereon, respectively, thereby
forming an X-shaped pattern, in which at positions adjacent to the
reinforcing portion, a plurality of through holes are formed
through the resilient portion.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention relates to a shoe sole having an
upwardly sloped front side and an upwardly rear side so that it has
a substantially arch-shaped bottom surface, in which a middle sole
made of a rigid material is embedded in an outsole. More
particularly, the present invention relates a shoe sole capable of
allowing a user to walk in such a manner that the total portions of
the foot can contact the ground in sequence with absorbing a shock
given by a weight of the user while walking, by attaching an
elliptical stamping cushion made of a material that is a softer
than the outsole in an arch-shaped groove formed at a rear lower
portion of the outsole, and which is capable of allowing the
stamping cushion to be rapidly compressed and to rapidly expand so
as to alleviate the shock by embedding a plate spring having a
circular shape in a main body of the stamping cushion, and which is
capable of preventing water from penetrating into the main body of
the stamping cushion by installing a waterproof cover on an outer
surface of the stamping cushion.
[0002] A prior art shoe sole structure is shown in Korean Utility
Model Registration No. 226048. This shoe sole structure includes a
resilient material, which has a U-shape and is embedded in a heel
portion of an outsole usually made of polyurethane. If a user putts
on a shoe having the shoe sole, the weight of the user tends to
concentrate in the heel portion while wearing the shoe. Then, the
U-shaped resilient material becomes slightly constricted and it has
a function of supporting the weight of the user, thereby absorbing
and alleviating a shock given to the sole of the foot to a
minimum.
[0003] One of the principal problems associated with resilient
material is that it cannot firmly being attached to the outsole.
The resilient material comprises a U-shaped steel plate having a
smooth surface. The outsole is usually made of polyurethane and the
resilient material is made of the steel plate, so that they cannot
firmly combine with each other.
[0004] If a user walks on a street while wearing the shoe, the
U-shaped resilient material becomes constricted and restored
repeatedly, thereby absorbing and alleviating a shock given to the
sole of the foot. Since the outsole and the resilient material are
not firmly combined with each other, a nerve-racking noise may be
generated there between at the time of contacting the ground. In
addition, the outsole usually made of polyurethane tears easily
because of the contact with the U-shaped resilient material made of
steel plate.
[0005] Another prior art shoe sole structure is shown in Korean
Patent Registration No. 575875. This shoe sole structure includes
an outsole having a rear side slanted upwards. In this shoe
structure, an arch-shaped groove is formed at the center of a lower
surface of the outsole and a rigid middle sole is installed at an
upper surface of the outsole. A cushion material is inserted into
the arch-shaped groove. A non-slip sole is attached onto the total
bottom surface of the outsole. Additional cushion materials are
attached to front and rear upper surfaces of the rigid middle
sole.
[0006] If a user a user walks on a street while wearing the shoe
having this shoe structure, the heel is the first portion of the
foot to contact the ground. As the step continues and the remainder
of the foot contacts the ground, the weight of the body is carried
forward along the lateral side of the foot. This type of walking is
what we called Masai walking, which is developed by Karl Mueller.
It is well known that this type of walking is good for health.
[0007] One drawback of prior art shoe sole is that a shock given
through the heel portion given by the weight of the user while
walking on the street with wearing the shoe is hardly absorbed and
alleviated. In detail, since the total shoe sole is made of some
same materials, the shoe may have the same capacity for absorbing
the shock over the total weight bearing surfaces of the sole. As a
result, the shoe having the shoe sole structure as described above
does not fully absorb and sufficiently alleviate the shock given by
the weight of the user while walking.
[0008] Another drawback of prior art shoe sole is that the user of
the shoe inconvenience oneself while walking on the street with
wearing the shoe. In detail, since the rigid middle sole is
installed at an upper surface of the outsole so as to maintain the
arch shape of shoe, it gives a feel that the user steps some hard
object while walking.
[0009] Accordingly, the present invention has been made to solve
the above-mentioned problems occurring in the prior art, an object
of the present invention is to provide a shoe sole capable of
allowing a user to walk in such a manner that the total portions of
the foot can contact the ground in sequence with absorbing a shock
given by a weight of the user while walking, by attaching an
elliptical stamping cushion made of a material that is a softer
than the outsole in an arch-shaped groove formed at a rear lower
portion of the outsole, and which is capable of continuously
maintaining the arch shape of the shoe sole so as to providing the
user with safe walking by embedding a middle sole in the outsole,
and which is capable of allowing the stamping cushion to be rapidly
compressed and to rapidly expand so as to alleviate the shock by
embedding a plate spring having a circular shape in a main body of
the stamping cushion, and which is capable of preventing water from
penetrating into the main body of the stamping cushion by
installing a waterproof cover on an outer surface of the stamping
cushion.
SUMMARY OF THE INVENTION
[0010] To accomplish the above object, the present invention
provides a shoe sole, of the type consisting of an outsole having a
front side and a rear side of a bottom surface thereof, which are
sloped upwards, a middle sole being made of a rigid material and
being installed in the outsole, and a non-slip sole being attached
over the total bottom surface of the outsole,
[0011] characterized in that it comprises an arch-shaped groove
formed at a center portion of the bottom surface of the outsole, an
elliptical stamping cushion installed in the arch-shaped groove,
the stamping cushion being made of a material that is a softer than
the outsole, in which the non-slip sole is attached over the total
bottom surface of the outsole and the exposed surface of the
stamping cushion, in which the middle shoe is rounded at a
substantially arch shape such that it is corresponding to the shape
of the outsole, in which the thickness of a front end of the middle
sole is smaller than those of other portions thereof, in which a
rib-shaped reinforcing portion is provided at a middle portion of
the middle sole, in which an uneven surface is provided on an upper
surface and a lower surface of the middle sole, respectively, in
which a plurality of through holes are formed through the middle
sole and a plurality of cut-away portions are formed at positions
of the front side of the middle sole, which are corresponding to
the toe, thereby forming resilient supporting portions.
[0012] Additional advantages, objects, and features of the
invention will be set forth in part in the description which
follows and in part will become apparent to those having ordinary
skill in the art upon examination of the following or may be
learned from practice of the invention. The objectives and other
advantages of the invention may be realized and attained by the
structure particularly pointed out in the written description and
claims hereof as well as the appended drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] FIG. 1 is a sectional view of a shoe sole according to the
present invention;
[0014] FIG. 2 is an exploded sectional view of the shoe sole as
shown in FIG. 1;
[0015] FIG. 3A is a plan view of a middle sole made of a rigid
material according to the present invention, and FIG. 3B is a
sectional view of the middle sole according to the present
invention;
[0016] FIG. 4 is a sectional view of a stamping cushion according
to the present invention;
[0017] FIG. 5A is a perspective view of a plate spring according to
a first preferred embodiment of the present invention, FIG. 5B is a
sectional view of the plate spring according to the first preferred
embodiment of the present invention; and
[0018] FIG. 6 is a perspective view of a plate spring according to
a second preferred embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0019] Hereinafter, the shoe sole according to the present
invention will be explained in more detail with reference to the
accompanying drawings FIGS. 1 to 6.
[0020] As shown in FIGS. 1 and 2, the shoe sole comprises an
upwardly sloped front side and an upwardly rear side so that it has
a substantially arch-shaped bottom surface. A middle sole 30 made
of a rigid material is embedded in the outsole 10. An arch-shaped
groove 11 is formed at a rear lower portion of the outsole 10. At
this time, the position of the arch-shaped groove 11 is
corresponding to one's heel. An elliptical stamping cushion 20 is
installed in the arch-shaped groove 11. Preferably, the stamping
cushion 20 is made of a material that is a softer than the outsole
10. A non-slip sole 40 is attached over the total bottom surface of
the outsole 10 and the exposed surface of the stamping cushion
20.
[0021] The outsole 10 of the walking shoe according to the present
invention is made of soft foam polyurethane and thereby it has a
cushion effect. As described above, the stamping cushion 20 is made
of a material such as a compressed sponge, which is a softer than
the outsole 10. Preferably, the softness of the stamping cushion 20
is typically about half the degree of soft that would do all the
outsole 10.
[0022] As best seen in FIGS. 2 and 4, the stamping cushion 20 is
provided with a waterproof cover 21 for preventing water from
penetrating into a main body 20a of the stamping cushion 20. The
waterproof cover 21 is made of a soft material such as a sponge,
EVA, etc. and it is attached to an outer surface of the stamping
cushion 20. Alternatively, the waterproof cover 21 can comprise a
vinyl that may be wound around or applied onto the total outer
surface of the main body 20a of the stamping cushion 20.
[0023] A pair of plate springs 22 is embedded in the main body 20a
of the stamping cushion 20. The plate springs 22 are made of an
elastic metal plate and are disposed in the main body 20a in such a
manner that they are opposite to each other. As shown in FIGS. 5A
and 5B, the plate spring 22 according to the first preferred
embodiment of the present invention has a circular-shaped tension
portion 23 and two resilient portions 25, which are integrally
formed with each other. One end of the resilient portion 25 is
integrally connected with one side of the circular-shaped tension
portion 23, respectively. This structure widens the space between
two resilient portions 25. A support pin 24 is inserted into an
opening of the circular-shaped tension portion 23. A reinforcing
portion 26 is added to an outer surface of the resilient portion 25
in a cylindrical embossing pattern thereon, respectively, thereby
forming an X-shaped pattern. At positions adjacent to the
reinforcing portion 26, a plurality of through holes 27 are formed
through the resilient port ion 25. A rounded portion 28 is formed
at a free end of the resilient portion 25, respectively.
[0024] As shown in FIGS. 2 and 3, the middle sole 30 is rounded at
a substantially arch shape such that it is corresponding to the
shape of the outsole 10. At this time, the thickness of a front end
of the middle sole 30 is smaller than those of other portions
thereof. A rib-shaped reinforcing portion 33 is provided at a
middle portion of the middle sole 30. An uneven surface 31 is
provided on an upper surface and a lower surface of the middle sole
30, respectively. A plurality of through holes 32 are formed
through the middle sole 30. A plurality of cut-away portions 34 are
formed at positions of the front side of the middle sole 30, which
are corresponding to the toe, thereby forming resilient supporting
portions 35.
[0025] FIG. 6 shows a plate spring 22a according to the second
preferred embodiment of the present invention. The plate springs
22a are made of an elastic metal plate. The plate spring 22a has
circular-shaped tension portions 23 and rounded resilient portions
25, which are integrally formed with each other. Both ends of the
resilient portion 25 are integrally connected with one side of the
circular-shaped tension portion 23, respectively. The resilient
portion 25 extends between the circular-shaped tensions portions
23. The resilient portion 25 is radially outwardly rounded between
the circular-shaped tension portions 23. This structure widens the
space between two resilient portions 25. A reinforcing portion 26
is added to an outer surface of the resilient portion 25 in a
cylindrical embossing pattern thereon, respectively, thereby
forming an X-shaped pattern. At positions adjacent to the
reinforcing port ion 26, a plurality of through holes 27 are formed
through the resilient portion 25.
MODE FOR INVENTION
[0026] Having described shoe sole according to the preferred
embodiment of the present invention in detail, the operational
relationship of the shoe sole can be understood as follows with
reference to accompanying drawings FIGS. 1 to 6.
[0027] In a process for manufacturing a shoe, the shoe sole
according to the present invention may be attached to a bottom
surface of a shoe sheath. If a user walks on a street while wearing
the shoe having this shoe structure, the heel is the first portion
of the foot to contact the ground. That is, if the user walks on a
street to Masai's manner of walking, the heel portion of the foot
contacts the ground earliest of all.
[0028] As shown in FIG. 1, in the shoe sole according to the
present invention, a front side and a rear side of the bottom
surface of the outsole 10 of which the middle sole 20 is attached
to the upper surface of the outsole 10 are sloped upwardly, thereby
forming a substantially arch shape of the shoe.
[0029] If a user walks on a street while wearing the shoe having
this shoe structure, the heel is the first portion of the foot to
contact the ground. As the step continues and the remainder of the
foot contacts the ground, the weight of the body is carried forward
along the outer circumferential side of the foot. If the heel
leaves the ground, the weight of the body shifts back towards the
medial side of the foot. Continuously, if the medial side leaves
the ground, the weight of the body shifts back towards the toe,
especially a great toe of the foot.
[0030] As shown in FIGS. 1 to 5, the elliptical stamping cushion 20
is installed in the arch-shaped groove 11 formed at a rear lower
portion of the outsole 10, which is corresponding to the hill
portion contacting the ground at first. Since the stamping cushion
20 is made of a material that is a softer than the outsole 10 and a
pair of plate springs 22 is embedded in the main body 20a of the
stamping cushion 20, the stamping cushion 20 can primarily absorb
the shock given by a weight of the user while walking.
[0031] As the stamping cushion 20 contacts the ground and then it
begins to be compressed, the plate springs 22 embedded in the
stamping cushion 20 is also compressed, thereby absorbing the shock
given by a weight of the user while walking. As the stamping
cushion 20 leaves the ground, the plate springs 22 restores its
original state due to the elastic force thereof and the stamping
cushion 20 restores its original oval shape.
[0032] Meanwhile, if the stamping cushion 20 contacts the wet
ground and then it is compressed while walking, water can flow into
the main body 20a of the stamping cushion 20, which is made of a
material belonging to the sponge system. Because of the waterproof
cover 21 is attached to an outer surface of the stamping cushion 20
or is wound around or applied onto the total outer surface of the
main body 20a of the stamping cushion 20, it is possible to prevent
water from flowing into the stamping cushion 20 while it being
compressed.
[0033] If water flows into the main body 20a of the stamping
cushion 20, the main body 20a made of a material belonging to the
sponge system hydrolyzes and thereby it is apt to corrode. Since
the waterproof cover 21 for preventing water from penetrating into
the main body 20a of the stamping cushion 20 is attached to the
total outer surface of the stamping cushion 20, it is possible to
prevent water from flowing into the main body 20a of the stamping
cushion 20 while it being compressed. Accordingly, there is nothing
to worry about the corrosion of the main body 20a of the stamping
cushion 20.
[0034] As described above, the main body 20a of the stamping
cushion 20 is made of a material belonging to the sponge system and
a pair of plate springs 22 embedded in the main body 20a of the
stamping cushion 20 is made of the steel plate. That is, since the
main body 20a is usually made of polyurethane and the plate springs
22 are made of the steel plate, they cannot firmly combine with
each other.
[0035] To solve this problem, the reinforcing portion 26 is added
to the outer surface of the resilient portion 25 in a cylindrical
embossing pattern thereon, respectively, thereby forming an
X-shaped pattern. At positions adjacent to the reinforcing portion
26, a plurality of through holes 27 are formed through the
resilient portion 25. A rounded portion 28 is formed at a free end
of the resilient portion 25, respectively. Due to this structure,
the plate springs 22 are firmly combined with the main body 20a.
Since the outwardly projected portions, the recessed portions and
the through holes 27 in the reinforcing portion 26 are filled with
the materials of the main body 20a, the materials of the main body
20a are integrally formed together. In addition, the rounded
portion 28 is combined with the materials of the main body 20a in
such a manner that it is driven into the materials of the main body
20a. Consequently, the plate springs 22 are firmly combined with
the materials of the main body 20a.
[0036] Meanwhile, the support pin 24 is inserted into the opening
of the circular-shaped tension portion 23 of the plate spring 22.
If the plate spring 22 is continuously compressed and restores its
initial state, the circular-shaped tension portion 23 is apt to
cause breakage owing to the fatigue accumulated thereon. At this
time, the support pin 24 inserted into the opening of the
circular-shaped tension portion 23 prevents the circular-shaped
tension portion 23 from being compressed and restoring its initial
state, thereby minimizing the breakage of the circular-shaped
tension portion 23.
[0037] If the plate spring 22 is continuously compressed and
restores its initial state, the main body 20a made of soft
materials belonging to the sponge system is apt to cause breakage
by means of the distal end of the resilient portion 25 made of
steel plate. To solve this problem, the rounded portion 28 is
provided at the distal end of the resilient portion 25 so that it
is possible to minimize the breakage of the main body 20a of the
plate spring 22.
[0038] The plate spring 22 has a relatively wide width of 40 mm or
so. If a user walks on a street while wearing the shoe, the plate
spring 22 is not always equally stepped on by means of the heel.
Since different persons have different manners of walking and the
road is not always smooth, the plate spring 22 is unevenly inwardly
or outwardly stepped on by means of the heel.
[0039] If the plate spring 22 is continuously stepped on to one
side by means of the heel, it is apt to cause transform of the
plate spring 22. According to the present invention, the
reinforcing portion 26 is added to the outer surface of the
resilient portion 25 in a cylindrical embossing pattern thereon,
respectively, thereby forming an X-shaped pattern. Due to this
structure, if the plate spring 22 is continuously stepped on to one
side by means of the heel, the reinforcing portion 26 supports the
plate spring 22 so as to prevent the plate spring 22 from being
transformed. As a result, the stamping cushion 20 can be equally
stepped on and restore its initial state while walking.
[0040] Hereinafter, the operational relationship of the middle sole
30 can be understood as follows with reference to accompanying
drawings FIGS. 1 to 3.
[0041] The middle sole 30 made of a rigid material is embedded in
the outsole 10. This middle sole 30 has an arch shape that is
substantially the same as the shape of the outsole 10 so as to
continuously maintain the arch shape of the outsole 10. The
rib-shaped reinforcing portion 33 is provided at a middle portion
of the middle sole 30. This rib-shaped reinforcing portion 33 has a
function of preventing the middle portion of the middle sole 30
from unfolding so that the middle portion 30 is not
transformed.
[0042] Since the middle sole 30 of the walking shoe according to
the present invention is made of soft foam polyurethane and is
embedded in the outsole 10, it is possible to attenuate the
oppressive feeling and to alleviate the pain applied to the sole of
the foot. The shoe sole of the present invention has significant
advantages over previously known shoe sole.
[0043] At the joint between the middle sole 30 and the outsole 10,
the uneven surface 31 is provided on an upper surface and a lower
surface of the middle sole 30, respectively. In addition, a
plurality of through holes 32 are formed through the middle sole 30
and a plurality of cut-away portions 34 are formed at positions of
the front side of the middle sole 30. Due to this structure, the
middle sole 30 is firmly combined with the outsole 10 so that it is
possible to prevent the middle sole 30 from being released from the
outsole 10.
[0044] The pluralities of cut-away portions 34 are formed at
positions of the front side of the middle sole 30, which are
corresponding to the toe, thereby forming resilient supporting
portions 35. When a user wears the shoes according to the present
invention, the toe is corresponding to the resilient supporting
portions 35. At this time, the user feels at ease due to operation
of the resilient supporting portions 35.
[0045] Since the pluralities of cut-away portions 34 are formed at
both sides of the front portion of the middle sole 30, this front
portion of the middle sole 30 can be easily bent so that the user
can move the toe with easy.
[0046] Hereinafter, the operational relationship of the plate
spring 22a can be understood as follows with reference to
accompanying drawing FIG. 6.
[0047] The plate spring 22a according to the second embodiment of
the present invention operates in the same manner as the plate
spring 22 according to the first embodiment of the present
invention, except for partial operation.
[0048] In the plate spring 22a according to the second preferred
embodiment of the present invention, the rounded resilient portions
25 are integrally formed with the circular-shaped tension portions
23 and extend between the circular-shaped tensions portions 23.
Between the circular-shaped tensions portions 23, the resilient
portions 25 are radially outwardly rounded and they exhibit an
elastic force. Accordingly, the plate spring 22a is formed as a
substantially oval shape. Due to this structure, when the plate
spring 22a is continuously compressed and restores its initial
state, it is possible to prevent the plate spring 22a from being
damaged.
[0049] In addition, the reinforcing portion 26 is added to an outer
surface of the resilient portion 25 in a cylindrical embossing
pattern thereon, respectively, thereby forming an X-shaped pattern.
Accordingly, the degree of strength of the resilient portion 25 is
enhanced due to operation of the reinforcing portion 26. If the
resilient portion 25 is pressed down at its outer side or inner
side, it is possible to minimize the excessive compression of the
resilient portion 25 due to operation of the reinforcing portion
26. As a result, it is possible to prevent the user from getting
sprained due to operation of the reinforcing portion 26.
[0050] In the description of the operation according to the present
invention as described above, it should be noted that, for the sake
of clarity and understanding of the invention, the detailed
description relative to the non-slip sole 40 attached to the lower
surfaces of the outsole 10 and the stamping cushion 20 is omitted.
As shown in FIG. 1, the non-slip sole 40 is attached over the total
bottom surface of the outsole 10 and the exposed surface of the
stamping cushion 20 in a state that an elliptical stamping cushion
20 is installed in the arch-shaped groove 11.
INDUSTRIAL APPLICABILITY
[0051] As described above, the shoe sole according to the present
invention is capable of allowing a user to walk in such a manner
that the total portions of the foot can contact the ground in
sequence due to absorbing a shock given by a weight of the user
while walking, by attaching an elliptical stamping cushion made of
a material that is a softer than the outsole in an arch-shaped
groove formed at a rear lower portion of the outsole, and which is
capable of continuously maintaining the arch shape of the shoe sole
so as to providing the user with safe walking by embedding a middle
sole in the outsole, and which is capable of allowing the stamping
cushion to be rapidly compressed and to rapidly expand so as to
alleviate the shock by embedding a plate spring having a circular
shape in a main body of the stamping cushion.
[0052] In addition, the shoe sole according to the present
invention is capable of preventing water from penetrating into the
main body of the stamping cushion by installing a waterproof cover
on an outer surface of the stamping cushion.
[0053] While the present invention has been particularly shown and
described with reference to the particular embodiments thereof, it
will be understood by those skilled in the art that various changes
in form and details may be effected therein without departing from
the spirit and scope of the invention as defined by the appended
claims.
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