Note: Descriptions are shown in the official language in which they were submitted.
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Description
SHOE SOLE HAVING UPWARDLY SLOPED FRONT AND
REAR SIDES
Technical Field
[ 1] The present invention relates to a shoe sole having upwardly sloped front
and rear
sides, which is used to manufacture a shoe of which a rigid middle sole is
installed at
an upper surface of an outsole and a shoe sheath is attached to an upper
surface of the
middle sole, in which an arch-shaped groove is formed at the center of a lower
surface
of the outsole. More particularly, the present invention relates a shoe sole
capable of
preventing a user putting on the shoe from slipping during going up the stairs
due to
the operation of a non-slip sole, which is capable of allowing the user for
feeling at
ease due to operation of cushion materials, and which is capable of firmly
attaching a
bottom surface of a shoe sheath to the upper surface of the outsole due to
operation of
projecting attaching parts, by attaching a non-slip sole onto the total bottom
surface of
the outsole after inserting a cushion materials into the arch-shaped groove
formed at
the lower surface of the outsole, by allowing the upper surface of the outsole
to expose
the outside of the upper surface of the middle sole, and by attaching cushion
materials
to a front and a rear sides of the upper surface of the middle sole.
Background Art
[2] This is the case of patent KR 10-2004-0108870 for example, which relates
to a
walking shoe having a rear balance walking function, including upwardly
slanted front
and rear sides, which has double grounding heels projecting from the center of
an
outsole toward the heel of the shoe. A rigid auxiliary outsole of which a
stainless plate
is inserted between plastics is mounted to the upper surface of the outsole.
Due to this
structure, the toe portion and the heel portion are slanted upwards with
centering on the
double grounding heels. The toe portion and the heel portion can move up and
down
with taking the double grounding heels as a point of action.
[3] The outsole of the walking shoe according to the prior art is made of a
soft foam
polyurethane and thereby it has a cushion effect. A rigid auxiliary outsole
made of a
rigid plastic plate is mounted to the upper surface of the outsole. A shoe
sheath is
attached to the upper surface of the rigid auxiliary outsole.
[4] Generally, the rigid auxiliary outsole made of a rigid plastic plate may
be easily
adhered to the upper surface of the outsole made of soft foam polyurethane by
means
of adhesives. Likewise, the shoe sheath made of leather, synthetic leather or
a fabric
paper, etc., may be easily adhered to the upper surface of the outsole made of
soft foam
polyurethane by means of adhesives. A disadvantage of prior art shoe sole is
that the
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rigid auxiliary outsole made of a rigid plastic plate may be hardly adhered to
the shoe
sheath made of a leather, a synthetic leather or a fabric paper, etc.
[5] Although, the lower surface of the rigid auxiliary outsole made of a rigid
plastic
plate can be easily attached to the upper surface of the outsole made of soft
foam
polyurethane by means of adhesives, the upper surface of the rigid auxiliary
outsole
may be hardly attached to the bottom surface of the shoe sheath during the
manu-
facturing process of the shoe.
[6] In order to enhance the adhesive force between the bottom surface of the
shoe
sheath and the upper surface of the rigid auxiliary outsole, an additional
fabric paper is
attached to the upper surface of the rigid auxiliary outsole and thereafter
the shoe
sheath is mounted thereto. However, the fabric paper that is attached to the
upper
surface of the rigid auxiliary outsole comes off there from as time passes. As
a result, a
nerve-racking noise may be generated when a user walks on a street with
putting on
the shoe. Consequently, it gives an unpleasant feeling to the user.
[7] Meanwhile, in the outsole of the walking shoe according to the prior art,
the arch-
shaped double grounding heels projecting from the center of the outsole toward
the
heel of the shoe are integrally formed with the outsole. Accordingly, they are
made of
soft foam polyurethane, which is the same as that of the outsole.
[8] If a user goes upstairs with putting on the shoe, the toe portion of the
outsole steps
on a flat ground at the stair and the center portion of the lower surface of
the outsole
contacts with the corner of the stair.
[9] In this situation, the arch-shaped portion of the lower surface of the
outsole
according to the prior art may be contacted with the corner of the stair.
Then, the user
may slip and fall on the stairs owing to a slip between the corner of the
stair and the
arch-shaped portion made of foam polyurethane.
[10] Another disadvantage of shoes having such outsole according to the prior
art is that
the user putting on the shoe may slip and fall on an unpaved road such as a
mountain
path. That is, if a use putting on the shoe according to the prior art walks
on an
unpaved road such as a mountain path, he or she may step a piece of stone at
the
arched-shaped portion of the sole of the foot. Then, the user may slip and
fall on the
road owing to a slip between the stone and the arch-shaped portion made of
foam
polyurethane. Furthermore, the user feels a pain while he or she steps a piece
of stone
at the arched-shaped portion of the sole of the foot.
Disclosure of Invention
Technical Problem
[ 11 ] 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
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shoe sole capable of preventing a user putting on the shoe from slipping
during going
up the stairs or walking on an unpaved road due to the operation of a non-slip
sole,
which is capable of allowing the user for feeling at ease due to operation of
cushion
materials, and which is capable of firmly attaching a bottom surface of a shoe
sheath to
the upper surface of the outsole due to operation of projecting attaching
parts, by
attaching a non-slip sole onto the total bottom surface of the outsole after
inserting a
cushion materials into the arch-shaped groove formed at the lower surface of
the
outsole, by allowing the upper surface of the outsole to expose the outside of
the upper
surface of the middle sole, and by attaching cushion materials to a front and
a rear
sides of the upper surface of the middle sole.
Technical Solution
[12] To accomplish the above object, the present invention provides a shoe
sole, of the
type consisting of an arch-shaped groove formed at a center portion of a
bottom
surface of an outsole, a front side and a rear side of the bottom surface of
the outsole
being sloped upwardly from the arch-shaped groove, a middle sole made of a
rigid
material attached to an upper surface of the outsole, characterized in that it
comprises a
central cushion attached to a lower surface of the arch-shaped groove so that
the arch-
shaped groove is filled with the central cushion, non-slip sole attaching
grooves
formed over the total lower surface of the outsole and an exposed surface of
the central
cushion, and a non-slip sole attached onto the non-slip sole attaching
grooves. The
shoe sole further comprises a front cushion attached to the front upper
surface of the
middle sole and a rear cushion attached to the rear upper surface of the
middle sole.
The shoe sole further comprises a middle sole insertion groove formed over the
upper
surface of the outsole, in which the middle sole insertion groove has a shape
cor-
responding to that of the middle sole and has a depth corresponding to the
thickness of
the middle sole, a sheath lower surface attaching part formed at an inner
circum-
ferential portion of a projection edge, front and rear projecting attaching
parts longi-
tudinally formed at front and rear bottom surfaces in the middle sole
insertion groove,
front and rear cutaway portions formed through the front and rear bottom
surfaces on
the middle sole, in which the front and the rear projecting attaching parts
pass through
the front and the rear cutaway portions upwards while the middle sole is
attached to the
outsole.
Brief Description of the Drawings
[13] 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
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realized and attained by the structure particularly pointed out in the written
description
and claims hereof as well as the appended drawings.
[14] FIG. 1 is an exploded perspective view of a shoe sole according to the
present
invention;
[15] FIG. 2 is a plan view of the shoe sole according to the present
invention;
[16] FIG. 3 is a sectional view taken along line "A-A" shown in FIG. 2; and
[17] FIG. 4 is a sectional view taken along line "B-B" shown in FIG. 2.
Best Mode for Carrying Out the Invention
[18] Hereinafter, the shoe sole having upwardly sloped front and rear sides
according to
the preferred embodiment of the present invention will be explained in more
detail
with reference to the accompanying drawings FIGS. 1 to 4.
[19] As best seen in FIG. 3, the shoe sole having upwardly sloped front and
rear sides
according to the preferred embodiment of the present invention is provided
with an
arch-shaped groove 11 formed at a center portion of a bottom surface of the
outsole 10.
A front side and a rear side of the bottom surface of the outsole 10 are
sloped upwardly
from the arch-shaped groove 11. A middle sole 20 made of a rigid material is
attached
to an upper surface of the outsole 10. A shoe sheath 30 is attached onto an
upper
surface of the middle sole 20.
[20] A central cushion 12 is attached to a lower surface of the arch-shaped
groove 11 so
that the arch-shaped groove 11 is filled with about a half of the central
cushion 12. The
other half of the central cushion 12 may be exposed to the outside of the
outsole 10.
Non-slip sole attaching grooves 13 are formed over the total lower surface of
the
outsole 10 and the exposed surface of the central cushion 12. A non-slip sole
14 is
attached over the exposed bottom surface of the outsole 10 and the exposed
surface of
the central cushion 12 in cooperation with the non-slip sole attaching grooves
13.
[21] Preferably, the central cushion 12 is formed at a level, which is the
same as that of
an assumed line (= a single-dotted line) projecting from one distal end to the
other
distal end of the arch-shaped groove 11, for "a" section as shown in FIG. 3.
Al-
ternatively, the other half of the central cushion 12 can be bulged out
downwards in a
manner that it does not hinder a person putting on the shoe from walking.
[22] As shown in FIGS. 1 to 3, a middle sole insertion groove 15 is formed
over the
upper surface of the outsole 10. The middle sole insertion groove 15 has a pre-
determined shape corresponding to the shape of the middle sole 20. Also, the
middle
sole insertion groove 15 has a predetermined depth corresponding to the
thickness of
the middle sole 20. A sheath lower surface attaching part 17 is formed at an
inner cir-
cumferential portion of a projection edge 16. Front and rear projecting
attaching parts
18,19 are longitudinally formed at front and rear bottom surfaces in the
middle sole
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insertion groove 15. Front and rear projecting attaching parts 18,19 project
from the
upper surface of the middle sole 20 in the middle sole insertion groove 15 at
a height,
which is the same as that of the sheath lower surface attaching part 17.
[23] As shown in FIG. 2, front and rear projecting attaching parts 18,19
project upwards
at front and rear sides of the middle sole insertion groove 15 and they are
spaced apart
from the sheath lower surface attaching part 17. When the shoe sheath 30 is
attached
onto the middle sole 20, front and rear projecting attaching parts 18,19 have
function to
increase a contact area between the shoe sheath 30 and the middle sole 20.
[24] The middle sole 20 may be injection molded from a suitable rigid plastic
material.
The bottom surface of the middle sole 20 is attached onto the upper surface of
the
outsole 10 of which the central portion is relatively lower than the front and
the rear
sides. Since the front and the rear sides of the outsole 10 are slanted
upwards, the
outsole 10 has an arch shape in total. When a user puts on a shoe having the
outsole 10
made of soft foam polyurethane, the middle sole 20 prevents the front and the
rear
sides of the outsole 10 from stretching downwards due to the weight of the
user.
[25] In the meantime, a front cutaway portion 21 is formed through a front
side of the
middle sole 20 and a rear cutaway portion 22 is formed through a rear side of
the
middle sole 20. When the middle sole 20 is attached to the outsole, the front
and the
rear projecting attaching parts 18,19 pass through the front and the rear
cutaway
portions 21,22 upwards. A front cushion 23 is attached to the upper surface of
the
middle sole 20 between the front projecting attaching parts 18. Likewise, a
second
cushion 24 is attached to the upper surface of the middle sole 20 between the
rear
projecting attaching parts 19.
[26] As shown in FIG. 4, the lower surface of the middle sole 20 is adhered to
the upper
surface of the outsole 10 by means of adhesives. The upper surface of the
middle sole
20 is adhered to a part of a lower surface of the shoe sheath 30 by means of
adhesives.
The other part of the lower surface of the shoe sheath 30 is attached to the
inner cir-
cumferential surface of the projecting edge 16, the sheath lower surface
attaching part
17, front and rear projecting attaching parts 18,19 and front and rear
cushions 23,24.
[27] At this time, except for the adhesive surfaces as described above, the
upper surface
of the middle sole 20 may be attached to the bottom surface of the shoe sheath
30 by
means of adhesives. Since the upper surface of the middle sole 20 is made of a
rigid
plastic plate and the bottom of the shoe sheath 30 is made of leather,
synthetic leather
or a fabric paper, etc., the adhesive force between the middle sole 20 and the
shoe
sheath 30 is not good.
[28] An inner sole is installed at an inside of the shoe sheath 30 and is
indicated in its
entirety by the reference numeral "31". This inner sole 31 is prepared by
enclosing a
stiff paper wick with a fabric paper. Alternatively, a certain material, which
is the same
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as that of the shoe sheath 30, can be used to form the inner sole 31 in a
manner that it
encloses the total bottom surface of the shoe sheath 30.
Mode for the Invention
[29] 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 4.
[30] In order to manufacture the shoe sole according to the present invention,
the central
cushion 12 having a good cushion effect is adhered to the lower surface of the
arch-
shaped groove 11 formed at the central lower surface of the outsole 10 by
means of
adhesives. Then, the non-slip sole 14 is adhered to over the non-slip
attaching groove
13, which is formed at the total surface of the front and the rear sides in
the lower
surface of the outsole 10, and to over the lower surface of the central
cushion 12.
[31] Since the non-slip sole 14 is typically made of a raw rubber and has a
plurality of
nonskid tread grooves formed at its bottom surface, it is possible to prevent
the shoe
from slipping without damaging the shoe at the change of season.
[32] After attaching the non-slip sole 14 to the total lower surface of the
outsole 10, the
middle sole 20 is inserted into the middle sole insertion groove 15 formed at
the upper
surface of the outsole 10.
[33] At this time, the front and the rear projecting attaching parts 18,19
protruding from
the middle sole insertion groove 15 upwardly pass through the front and the
rear
cutaway portions 21,22 of the middle sole 20.
[34] When the middle sole 20 is inserted and attached into the middle sole
insertion
groove 15 of the upper surface of the outsole 10, the upper surface of the
sheath lower
surface attaching part 17 is positioned at a level, which is the same as those
of the
upper surface of the middle sole 20 and the upper surface of the front and the
rear
projecting attaching parts 18,19. Because the size of the middle sole 20 is
smaller than
that of the outsole 10, the middle sole insertion groove 15 is formed at a
depth that is
corresponding to the thickness of the middle sole 20. At this time, the height
of the
front and the rear projecting attaching parts 18,19 is the same as that of the
sheath
lower surface attaching part 17.
[35] Under this state, if the bottom surface of the shoe sheath 30 is attached
to the upper
surface of the outsole 10 on which the middle sole 20 is adhered, a
circumferential
edge of a lower surface of the shoe sheath 30 is attached to the inner surface
of the
projecting edge 16 and the sheath lower surface attaching part 17 formed at
the lower
circumferential edge of the projecting edge 16. In addition, the other part of
circum-
ferential edge of a lower surface of the shoe sheath 30 is attached to the
upper surface
of the upper surfaces of the front and the rear projecting attaching parts
18,19, which
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are exposed to the upper surfaces of the front and the rear cutaway portions
21,22 of
the middle sole 20.
[36] Since the shoe sheath 30 made of a leather, a synthetic leather or a
fabric paper,
etc., is attached to the outsole 10 made of a soft foam polyurethane having a
cushion
effect by means of adhesives, the front and the rear projecting attaching
parts 18,19
exposed to the upper surfaces of the middle sole 20 are firmly adhered to the
bottom
surface of the shoe sheath 30.
[37] When the bottom surface of the shoe sheath 30 is attached to the upper
surface of
the outsole 10 on which the middle sole 20 is attached, a shoe manufacturer
may worry
about that the front and the rear cushions adhered to the upper surface of the
middle
sole 20 between the front and the rear projecting attaching parts 18,19 are
partially
attached to the upper surface of the middle sole 20 and the bottom surface of
the shoe
sheath 30, that is the inner sole 31 attached to the inner lower surface of
the shoe
sheath 30.
[38] However, the portions on which the front and the rear cushions 23,24 are
attached
are adhered to the lower surface of the inner sole 31 that is attached to the
inner surface
of the shoe sheath 30. Since the shoe sheath 30 has a predetermined thickness
and the
front and the rear cushions 23,24 are made of certain materials having a good
cushion
effect such as a thin sponge having a thickness of 3 to 5mm, EVA, etc., the
front and
the rear cushions 23,24 are compressed and adhered together with the vicinity
thereof.
At this time, the shoe sheath 30 is attached to the upper surface of the
outsole 10 on
which the middle sole 20 is attached. The front and the rear cushions 23,24
are
attached to the upper surface of the middle sole 20.
[39] As described above, when the bottom surface of the shoe sheath 30 is
attached to
the upper surface of the middle sole 20, a fabric paper is attached to the
upper surface
of the middle sole 20 so as to make the middle sole 20 made of a plastic
material
adhere to the bottom surface of the shoe sheath 30.
[40] According to the present invention, the shoe sole is made of a relatively
soft
material and the central portion of the lower surface of the shoe sole is
bulged out
downwards. Furthermore, the front and the rear sides of the shoe sole are
slanted
upwards and the flat and rigid middle sole 20 is installed on the upper
surface of the
shoe sole. If a user walks on a street with putting on the shoe on which the
shoe sole is
installed, the front and the rear sides of the shoe are spaced from the ground
upwards
and only the central portion is contacted with the ground.
[41] At this time, the front and the rear sides of the shoe have a tendency to
droop
downwards, the toe and the heel have a tendency to get bent downwards because
the
rigid middle sole 20 supports the weight of the user. And the central portion
has a
tendency to get bent upwards and an oppressive feeling is transmitted to the
total sole
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of the foot, and thereby the user can feel the finger-pressure effect.
However, if the
user puts on the shoe for a long time, he or she has a pain.
[42] According to the present invention, it is possible to attenuate the
oppressive feeling
and to alleviate the pain applied to the sole of the foot due to operation of
the central
cushion 12 installed at the lower surface of the outsole 10 and the front and
the rear
cushions 23,24 installed at the front and the rear sides of the upper surface
of the
middle sole 20.
[43] The non-slip sole 14 for preventing the shoe from slipping is installed
at the total
surface of the lower surface of the sole according to the present invention.
Ac-
cordingly, when a user walks on a street with putting on the shoe, he or she
does not
slip although stepping on a certain object.
[44] If a person goes upstairs with putting on a shoe, the central lower
portion of the sole
of the foot contacts with a corner portion of the stair. A plurality of shoes
according to
the prior art are not provided with non-slip means at the central lower
portion of the
sole of the foot. Accordingly, if a person goes upstairs with putting on the
shoe
according to the prior art, he or she may slip on the stairs. Since the shoe
according to
the present invention is provided with the non-slip sole 14 at the total
surface of the
sole of the foot, it is possible to prevent the user from slipping on the
stairs.
[45] If a person walks on an unpaved road such as a mountain path, he or she
may step a
piece of stone at a certain part of the sole of the foot. Since the shoe
according to the
present invention is provided with the non-slip sole 14 at the total surface
of the sole of
the foot, it is possible to prevent the user from slipping on the unpaved
road.
[46] Meanwhile, in the shoe sole according to the present invention, a part of
the central
cushion is bulged out downwards and the front and the rear sides of the
outsole are
upwardly slanted. If the shoe is hanging in the air, then the gravity is
applied to the toe
and the heel of the shoe due to this structure. At this time, the center of
gravity of a
person putting on the shoe is leaning to the rear side and thereby it is
possible to
activate the muscle relative to walking due to the rear balance.
Industrial Applicability
[47] As described above, the shoe sole according to the present invention is
capable of
preventing a user putting on the shoe from slipping during going up the stairs
due to
the operation of a non-slip sole, which is capable of allowing the user for
feeling at
ease due to operation of cushion materials, and which is capable of firmly
attaching a
bottom surface of a shoe sheath to the upper surface of the outsole due to
operation of
projecting attaching parts, by attaching a non-slip sole onto the total bottom
surface of
the outsole after inserting a cushion materials into the arch-shaped groove
formed at
the lower surface of the outsole, by allowing the upper surface of the outsole
to expose
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the outside of the upper surface of the middle sole, and by attaching cushion
materials
to a front and a rear sides of the upper surface of the middle sole.
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