U.S. patent application number 14/971575 was filed with the patent office on 2016-06-23 for sport shoe.
The applicant listed for this patent is BABOLAT VS. Invention is credited to Julien ALBERTI, Aristide WOLFROM.
Application Number | 20160174656 14/971575 |
Document ID | / |
Family ID | 52807912 |
Filed Date | 2016-06-23 |
United States Patent
Application |
20160174656 |
Kind Code |
A1 |
WOLFROM; Aristide ; et
al. |
June 23, 2016 |
SPORT SHOE
Abstract
This sport shoe includes an outer sole suitable for ground
contact, an inner sole situated under a foot of an athlete, and an
intermediate sole between the outer and inner soles. The outer sole
is divided, along a longitudinal axis of the shoe, into at least
three transverse zones including a front zone located at least
partially below the toes of the foot, a median transverse zone
provided to be at least partially located below a region of the
foot extending between the base of the toes and a front end of the
arch of the foot, and a rear zone provided to be located at least
partially below a region of the foot extending backward from the
front end of the arch of the foot. The three transverse zones are
separated by transverse flexion lines whose flexibility is greater
than the flexibility of the three transverse zones.
Inventors: |
WOLFROM; Aristide; (LYON,
FR) ; ALBERTI; Julien; (BRIGNAIS, FR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
BABOLAT VS |
LYON |
|
FR |
|
|
Family ID: |
52807912 |
Appl. No.: |
14/971575 |
Filed: |
December 16, 2015 |
Current U.S.
Class: |
36/28 |
Current CPC
Class: |
A43B 13/22 20130101;
A43B 13/38 20130101; A43B 13/188 20130101; A43B 13/223 20130101;
A43B 13/141 20130101; A43B 13/122 20130101; A43B 5/10 20130101;
A43B 17/00 20130101 |
International
Class: |
A43B 13/14 20060101
A43B013/14; A43B 13/18 20060101 A43B013/18; A43B 13/12 20060101
A43B013/12; A43B 5/10 20060101 A43B005/10 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 17, 2014 |
FR |
1462660 |
Claims
1-11. (canceled)
12. A sport shoe, in particular for tennis, comprising, inter alia:
an outer sole adapted to be in contact with the ground, an inner
sole provided to be situated below an athlete's foot, an
intermediate sole inserted between the outer sole and the inner
sole, the outer sole being divided, along a longitudinal axis of
the shoe, into at least three transverse zones comprising: a front
zone provided to be located at least partially under the toes of
the foot, a median transverse zone provided to be at least
partially located below a region of the foot extending between the
base of the toes and a front end of the arch of the foot, a rear
zone provided to be located at least partially below a region of
the foot extending backward from the front end of the arch of the
foot, the three transverse zones being separated by transverse
flexion lines whose flexibility is greater than the flexibility of
the three transverse zones, the outer sole being divided, along a
transverse axis of the shoe, into three longitudinal zones
comprising: an inner zone provided to be at least partially under
the big toe, a central longitudinal zone provided to be at least
partially below the second and third toes, an outer zone provided
to be at least partially below the fourth and fifth toes, the three
longitudinal zones being separated by longitudinal flexion lines
whose flexibility is greater than the flexibility of the three
longitudinal zones, wherein the intermediate sole comprises,
superimposed on the front zone and the median transverse zone,
three cushions comprising: an inner cushion at least partially
superimposed on the inner zone, a central cushion at least
partially superimposed on the central longitudinal zone, an outer
cushion at least partially superimposed on the outer zone, and
wherein the inner and outer cushions are made from materials with
an energy return capacity greater than the material from which the
central cushion is made.
13. The sport shoe according to claim 12, wherein the transverse
flexion lines and/or the longitudinal flexion lines are at least
partially curved.
14. The sport shoe according to claim 12, wherein the transverse
flexion lines and/or the longitudinal flexion lines at least
partially have a broken rectilinear shape.
15. The sport shoe according to claim 12, wherein the flexion lines
are formed by at least one groove running along an outer surface of
the outer sole.
16. The sport shoe according to claim 15, wherein the flexion lines
are formed by two grooves running side by side over the outer
surface of the outer sole and separated by a rib.
17. The sport shoe according to claim 15, wherein the grooves have
a depth comprised between 0.5 and 5 millimeters.
18. The sport shoe according to claim 12, wherein the longitudinal
flexion lines have a concave shape whereof the concave side is
oriented toward the inside of the shoe.
19. The sport shoe according to claim 12, wherein the transverse
flexion lines have a concave shape whereof the concave side is
oriented toward the back of the shoe.
20. The sport shoe according to claim 12, wherein the outer sole
includes a fourth zone extending behind the rear zone and provided
to be located under the heel of the foot.
21. The sport shoe according to claim 12, wherein the inner sole
has a lower face divided into three transverse zones and three
longitudinal zones superimposed with the transverse zones and the
longitudinal zones of the outer sole, these transverse and
longitudinal zones of the inner sole being defined by transverse
flexion lines and longitudinal flexion lines superimposed on the
transverse flexion lines and longitudinal flexion lines of the
outer sole, the flexibility of the flexion lines of the inner sole
being greater than that of the zones of the inner sole.
Description
[0001] The present invention relates to a sport shoe, in particular
a tennis shoe.
[0002] Sports require changes in support and direction, as well as
sudden stops after running, involving significant forces on
athletes' feet, resulting in the need for appropriate sport shoes
making it possible on the one hand to prevent injuries while
improving comfort and cushioning of the foot, and on the other hand
to adapt the shoe to the movement characteristics associated with
the sport in question to optimize the dynamics of the athlete's
movements.
[0003] In the case of tennis, forward movements and lateral
movements are made very frequently, causing many changes in
directions, and are a major technical issue for players'
performance. The existing shoes at this time do not allow optimal
adaptation to the physiological and athletic characteristics of the
movements of a tennis player.
[0004] US-A-2007/0199213 discloses a sports shoe comprising an
outer sole having longitudinal and transverse flexion lines that
divide the outer sole into several zones. The performances of such
a shoe are not optimized.
[0005] The invention more particularly aims to resolve these
drawbacks by proposing a new sport shoe, in particular for tennis,
the structure of which makes it possible to optimize the movements
made by an athlete during play and to improve his performance.
[0006] To that end, the invention relates to a sport shoe, in
particular for tennis, comprising, inter alia: [0007] an outer sole
adapted to be in contact with the ground, [0008] an inner sole
provided to be situated below an athlete's foot, [0009] an
intermediate sole inserted between the outer sole and the inner
sole, the outer sole being divided, along a longitudinal axis of
the shoe, into at least three transverse zones comprising: [0010] a
front zone provided to be located at least partially under the toes
of the foot, [0011] a median transverse zone provided to be at
least partially located below a region of the foot extending
between the base of the toes and a front end of the arch of the
foot, [0012] a rear zone provided to be located at least partially
below a region of the foot extending backward from the front end of
the arch of the foot, the three transverse zones being separated by
transverse flexion lines whose flexibility is greater than the
flexibility of the three transverse zones, the outer sole being
divided, along a transverse axis of the shoe, into three
longitudinal zones comprising: [0013] an inner zone provided to be
at least partially under the big toe, [0014] a central longitudinal
zone provided to be at least partially below the second and third
toes, [0015] an outer zone provided to be at least partially below
the fourth and fifth toes, the three longitudinal zones being
separated by longitudinal flexion lines whose flexibility is
greater than the flexibility of the three longitudinal zones.
[0016] This shoe is characterized in that the intermediate sole
comprises, superimposed on the front zone and the median transverse
zone, three cushions comprising: [0017] an inner cushion at least
partially superimposed on the inner zone, [0018] a central cushion
at least partially superimposed on the central longitudinal zone,
[0019] an outer cushion superimposed at least partially on the
outer zone, and in that the inner and outer cushions are made from
materials with an energy return capacity greater than the material
from which the central cushion is made.
[0020] Owing to the invention, the athlete benefits from a sole
whose flexibility allows better control depending on the
characteristics of the game, and optimal adaptation of the
flexibility to the different phases of play that may occur when
playing the sport, which makes it possible to improve playing
performance. The correspondence between the cushions of the
intermediate sole and the areas of the outer sole allows a better
efficiency of the energy delivery depending on the game situations
and foot areas requested, which improves the dynamic movements of
the player.
[0021] According to advantageous but optional aspects of the
invention, such a sport shoe may incorporate one or more of the
following features, considered in any technically allowable
combination: [0022] The transverse flexion lines and/or the
longitudinal flexion lines are at least partially curved. [0023]
The transverse flexion lines and/or the longitudinal flexion lines
at least partially have a broken rectilinear shape. [0024] The
flexion lines are formed by at least one groove running along an
outer surface of the outer sole. [0025] The flexion lines are
formed by two grooves running side by side on the outer surface of
the outer sole and separated by a rib. [0026] The grooves have a
depth comprised between 1 and 5 millimeters. [0027] The transverse
flexion lines have a concave shape whereof the concave side is
oriented toward the back of the shoe. [0028] The longitudinal
flexion lines have a concave shape whereof the concave side is
oriented toward the inside of the shoe. [0029] The outer sole
includes a fourth zone extending behind the rear zone and provided
to be located under the heel of the foot. [0030] The inner sole has
a lower face divided into three transverse zones and three
longitudinal zones superimposed with the transverse zones and the
longitudinal zones of the outer sole, said transverse and
longitudinal zones of the inner sole being delimited by transverse
flexion lines and longitudinal flexion lines superimposed with the
transverse and longitudinal flexion lines of the outer sole, the
flexibility of the flexion lines of the inner sole being greater
than that of the zones of the inner sole.
[0031] The invention will be better understood, and other
advantages thereof will appear more clearly, in light of the
following description of a sport shoe according to its principle,
provided as a non-limiting example in reference to the appended
drawings, in which:
[0032] FIG. 1 is a bottom view of part of a shoe according to the
invention;
[0033] FIG. 2 is a longitudinal sectional view along plane II-II in
FIG. 1, of the shoe part of FIG. 1;
[0034] FIG. 3 is a cross-section along plane III-III in FIG. 1, of
the shoe of FIG. 1,
[0035] FIG. 4 is a top view of an intermediate sole belonging to
the shoe of FIGS. 1 to 3,
[0036] FIG. 5 is a bottom view similar to FIG. 1, of part of the
shoe according to one alternative of the invention;
[0037] FIG. 6 is a bottom view of an inner sole of the shoe of
FIGS. 1 to 5,
[0038] FIG. 7 is a longitudinal sectional view along the plane
VII-VII of the inner sole of FIG. 6.
[0039] A sport shoe 1 is partially shown in FIGS. 1 to 5. This shoe
1 is more particularly adapted to playing tennis.
[0040] As shown in FIGS. 2 and 3, the shoe 1 comprises an outer
sole 3, suitable for being in contact with the ground, an inner
sole shown on FIGS. 6 and 7 provided to be situated under a foot P
of an athlete, and an intermediate sole 5 inserted between the
outer sole 3 and the inner sole in a vertical direction. The shoe 1
also comprises an upper, a tongue and tightening members, not
shown.
[0041] The shoe 1 defines a longitudinal axis X-X' extending
globally between a front end 10 and a rear end 12 of the shoe 1. In
the rest of the description, the adjectives "front" and "rear" are
used in reference to the axis X-X' and the front 10 and rear 12
ends.
[0042] Likewise, the shoe 1 defines a transverse direction Y-Y'
perpendicular to the axis X-X', and which extends between an inner
side I of the foot P, which is located on the right side of FIG. 1
and the left side of FIG. 4, and an outer side E situated on the
left side of FIG. 1 and the right side of FIG. 4. The inner side of
the foot P is that which is oriented toward the vertical central
axis of the human body. In the rest of the description, the
adjectives "inner" and "outer" are used in reference to the
transverse direction Y-Y'.
[0043] The foot P comprises five toes, including the big toe 21
located on the inner side of the foot P, as well as a second,
third, fourth and fifth toe, respectively numbered 22, 23, 24 and
25 from the inside of the foot toward the outside.
[0044] As shown in FIG. 1, the outer sole 3 is divided, along the
longitudinal axis X-X', into three transverse zones.
[0045] A first zone 3A, called front zone, extends between the
front end 10 and a region of the shoe 1 corresponding to the base
of the toes of the athlete's foot P. The front zone 3A therefore
globally corresponds to the zone of the outer sole 3 provided to be
situated at least partially below the athlete's toes.
[0046] The distance between the front end 10 and the rear end 12 is
defined as being the total length of the outer sole 3.
[0047] The front zone 3A extends over a distance comprised between
10 and 30% of the total length of the outer sole 3A from the front
end 10.
[0048] A second zone 3B, called median transverse zone, is provided
to extend at least partially below a region of the foot P situated
between the base of the toes and a front end P1 of the arch of the
foot, i.e., the arched zone of the foot P, also called "plantar
arch". This region, which is the fleshiest part of the foot P, is
greatly stressed when playing sports, and more particularly when
playing tennis. When the player braces himself to move before
hitting, a large portion of the body weight rests on this part of
the foot P.
[0049] The median zone 3B extends over a distance comprised between
15 and 25% of the total length of the outer sole 3 from the front
zone 3A.
[0050] The outer sole 3 includes a third zone 3C, called rear zone,
which is provided to be situated below a region of the foot P
extending backward from the front end P1 of the arch of the foot.
The rear zone 3C is provided to extend below the plantar arch.
[0051] The rear zone 3C extends over a distance comprised between
20 and 40% of the total length of the outer sole 3 from the median
zone 3B.
[0052] Optionally, the outer sole 3 also comprises a fourth
transverse zone 3T provided to be located under the heel. The zone
3T extends backward from the rear zone 3C to the rear end 12. This
zone 3T extends over a distance comprised between 20 and 40% of the
total length of the outer sole 3 from the rear zone 3C.
[0053] The zone 3A is separated from the zone 3B by a first
transverse flexion line 30, and the zone 3B is separated from the
zone 3C by a second transverse flexion line 32. The transverse
flexion line 30 is provided to be found globally under the base of
the toes. The transverse flexion line 32 is provided to be found
globally under the front end P1 of the arch of the foot P. The
flexion lines 30 and 32 constitute strips of the outer sole 3 whose
flexibility is greater than the flexibility of the zones 3A, 3B and
3C. Flexibility refers to the deformation capacity of the material
under the effect of the flexion force. In other words, the
deformation capacity of the outer sole 3 in the flexion lines 30
and 32 is greater than the deformation capacity of the outer sole 3
in the zones 3A, 3B and 3C. The flexion lines 30 and 32 therefore
make it possible to articulate the zones 3A, 3B and 3C relative to
one another.
[0054] Thus, when playing a sport, and more particularly tennis,
the outer sole 3 is particularly suitable for bracing during which
most of the body weight is placed on the fleshy region extending
between the base of the toes and the front end P1 of the arch of
the foot, in particular when the tennis player is in a waiting
stance before a hit by the opponent. The median transverse zone 3B
is particularly stressed in this configuration.
[0055] The front zone 3A allows bearing of the player on the ground
when the player dashes forward, and therefore transmits a large
impulse to the ground through his toes. The flexibility of the
front zone 3A relative to the median transverse zone 3B therefore
allows better energy transmission to the ground and thus increases
the forward movement efficiency of the player.
[0056] As shown in FIGS. 1 and 2, the outer sole 3 is also divided,
along the transverse axis Y-Y', into three longitudinal zones.
[0057] A first longitudinal zone 3D, called inner zone, extends
from an inner edge 34 of the outer sole 3 and is provided to be
situated at least partially under the big toe 21. The inner zone 3D
extends in the front zone 3A, in the median zone 3B and in the rear
zone 3C.
[0058] The distance between the inner edge 34 and the outer edge 36
is defined as the total width of the outer sole 3.
[0059] The inner zone 3D extends over a distance comprised between
20 and 40% of the total width of the outer sole 3 from the inner
edge 34.
[0060] A second longitudinal zone 3E, called central longitudinal
zone, is provided to be at least partially under the second and
third toes 22 and 23. The zone 3E extends in the front zone 3A and
the median zone 3B to the rear zone 3C, in which it extends
partially.
[0061] The central zone 3E extends over a distance comprised
between 20 and 40% of the total width of the outer sole 3 from the
inner zone 3D.
[0062] A third zone 3F, called outer zone, extends from an outer
edge 36 of the outer sole 3, and is provided to be located at least
partially under the fourth and fifth toes 24 and 25. The zone 3F
extends in the front zone 3A and in the median zone to the rear
zone 3C, in which it extends partially.
[0063] The outer zone 3F extends over a distance comprised between
20 and 40% of the total width of the outer sole 3 from the outer
edge 36.
[0064] The longitudinal zone 3D is separated from the longitudinal
zone 3E by a longitudinal flexion line 38 provided to pass
approximately between the big toe 21 and the second toe 22, and the
longitudinal zone 3E is separated from the longitudinal zone 3F
[by] a longitudinal flexion line 40 provided to pass approximately
between the third toe 23 and the fourth toe 24. The flexibility of
the flexion lines 38 and 40 is greater than the flexibility of the
longitudinal zones 3D, 3E and 3F. In the same way as for the
transverse zones, this flexibility allows an articulation of the
longitudinal zones relative to one another and better force
transmission to the ground when playing a sport.
[0065] When playing tennis, lateral movements are a preponderant
aspect requiring speed and explosiveness. To that end, the
transmission of forces between the tennis player's foot and the
ground makes it possible to guarantee the efficiency and speed of
changes in direction, which cause slowing, stops and restarts in a
different direction. This aspect is also important when the player
slows down after running, where the outer zone 3F is stressed.
[0066] As shown in FIG. 1, due to the different morphologies of
feet, the positioning of the zones 3A, 3B, 3C, 3D, 3T, 3E and 3F
may not correspond exactly to the location of the different parts
of the foot. Some toes may in particular straddle two longitudinal
zones, and the longitudinal flexion lines 38 and 40 may not pass
exactly between the big toe 21 and the second toe 22 and between
the third toe 23 and the fourth toe 24.
[0067] The intermediate sole 5 comprises cushions superimposed on
the front zone 3A and the median transverse zone 3B. These cushions
comprise an inner cushion 50, globally superimposed on the inner
zone 3D. The inner cushion 50 allows a distribution of pressures
and return of stored energy for better dynamism during bearing on
the inner side of the foot, for example upon explosive startup or
landing a jump after serving involving a significant force
transmitted by the big toe 21, for a lateral movement.
[0068] The intermediate sole 5 also comprises a central cushion 52
globally superimposed on the central longitudinal zone 3E. This
cushion is stressed during the weight transfer phase of the body or
ground anchoring before hitting, during which stable support is
needed.
[0069] The intermediate sole 5 also comprises a third outer cushion
54, globally superimposed on the outer zone 3F. This cushion 54
makes it possible to distribute the pressure exerted on the outside
of the foot and initiate restarting, for example during slowing
after lateral travel, or during an impulse given with the fourth
and fifth toes 24 and 25 during a movement or a change in
direction.
[0070] The central cushion 52 is formed by an expanse of material
in which the cushions 50 and 54 are incorporated, and which extends
to the rear of the intermediate sole 5. The cushions 50 and 54 are
cushions attached in cavities of the central cushion 52.
[0071] Alternatively, the central cushion 52 can be an attached
cushion of the same type as the cushions 50 and 52, and form an
element independent from the rest of the intermediate sole 5. The
central cushion 52 can also be made up of a rigid element, such as
a strip of plastic, carbon or any other material, positioned in a
housing extending between the cushions 50 and 54.
[0072] In order to allow more dynamic movement by the player, the
inner 50 and outer 54 cushions are made from a material with a high
energy return capacity exceeding that of the material from which
the central cushion 52 is made. More specifically, the material of
the cushions 50 and 54 has a resilience, i.e., a capacity to return
to a shape close to its initial shape quickly after a deformation,
exceeding that of the material of the cushion 52. Thus, during
lateral movements involving bracing using the big toe 21 or the
fourth and fifth toes 24 and 25, or in case of a sudden stop for
example with the fourth and fifth toes, the foot is cushioned, then
the energy is returned in order to increase the speed of execution
of the change in direction and therefore the player's overall
footwork performance. The coincidence of the cushions 50, 52 and 54
with the longitudinal division of the outer sole 3 by the zones 3D,
3E and 3F allows increased effectiveness of the force transmission
between the player and the ground during lateral movements.
[0073] As an example, the inner cushion 50 and the outer cushion 54
can be made from a cushioning and elastic material, such as a
synthetic foam or a rubber. The central cushion 52 can be made from
a rigid or semi-rigid synthetic foam.
[0074] Optionally, the intermediate sole 5 also comprises a rear
cushion 56 superimposed on the zone 3T and provided to be found
under the heel to provide shock absorption on the heel. In the
example, the rear cushion 56 is encompassed in the central cushion
52.
[0075] The flexion lines 30, 32, 38 and 40 are formed by grooves 42
running side by side over an outer surface S3 of the outer sole 3.
A rib 44 extends between the grooves 42. At the grooves 42, the
thickness of the outer sole 3 is therefore reduced, which increases
flexibility.
[0076] In an alternative that is not shown, the flexion lines can
be formed by a single groove 42.
[0077] The grooves 42 preferably have a depth, considered relative
to the outer surface S3, comprised between 0.5 and 5 mm for a mean
thickness of the sole 3 comprised between 3 and 5 mm. Thus, the
grooves have a depth representing 10 to 100% of the mean thickness
of the sole 3.
[0078] According to one alternative of the invention that is not
shown, the grooves 42 can cross through the entire width of the
outer sole 3, making the intermediate sole 5 visible in bottom view
of the shoe 1.
[0079] The flexion lines 30, 32, 38 and 40 preferably have a width
comprised between 1 and 10 mm.
[0080] As shown in FIG. 1, the flexion lines 30, 32, 38 and 40 have
a broken rectilinear shape. In general, the flexion lines 30, 32,
38 and 40 have an at least partially rectilinear shape. In an
alternative shown in FIG. 5, the flexion lines 30, 32, 38 and 40
can also have an at least partially curved shape.
[0081] The transverse flexion lines 30 and 32 have a concave shape
whereof the concave side is oriented toward the rear, to follow the
natural curve of the base of the toes and the front end P1 of the
arch of the foot.
[0082] The longitudinal flexion lines 38 and 40 have a concave
shape whereof the concave side is oriented toward the inside of the
foot to follow the natural curve of the inner and outer edges of
the foot.
[0083] The flexion lines 30, 32, 38 and 40 are secant and form nine
sub-zones.
[0084] The flexion lines 30 and 32 extend to the outer edge 36 of
the outer sole 3 and stop before the inner edge 34. In an
alternative that is not shown, the flexion lines 30 and 32 can
extend the inner edge 34.
[0085] The flexion lines 38 and 40 extend between a central part 46
of the outer sole 3 that is provided to be raised relative to the
ground, to the vicinity of the front end 10. In the illustrated
example, the flexion line 38 extends to the front end 10, while the
flexion line 40 ends before the front end 10. In an alternative
that is not shown, the flexion lines 40 can extend to the end
10.
[0086] The locations of the longitudinal zones 3A, 3B and 3C and
transverse zones 3D, 3E and 3F, as well as the flexion lines 30,
32, 38 and 40, can be different depending on the importance
preferably given to certain zones of the outer sole 3 rather than
others.
[0087] For example, a tennis player whose footwork is swift and
explosive will perform more outward bracing, toward the front
stressing zones 3A and 3B, or laterally with the zones 3D and 3F.
In such a case, this player will stress all of the zones of the
outer sole 3 and the zones 3A, 3B, 3D and 3F will therefore have a
larger area than on a shoe intended for a player with less
explosive footwork.
[0088] This second type of player, with a more fluid, slower and
more grounded footwork, will place more stress on the zones 3B, to
a lesser extent 3A, during bracing or forward striking, and in
changes of direction and blocking, this second type of player will
stress zones 3E and 3D more. Zones 3E and 3D will therefore have a
greater surface area over shoes designed for players with more
fluid and grounded, and less explosive, footwork.
[0089] An optional embodiment of the invention is shown on FIGS. 6
and 7. The inner sole 7, also called sockliner, and which is
advantageously removable from the shoe, is in contact with the
foot. The inner sole 7 includes a bottom face 71 which is in
contact with the midsole 5.
[0090] The lower face 71 is divided, in the same way that the outer
sole 3, in a plurality of transverse and longitudinal zones
separated by flexion lines, and which are aligned with the zones
and flexion lines of the outer sole 3. The lower face 71 includes a
front zone 71A superimposed on the front zone 3A, a median
transverse zone 71B superimposed on the median transverse zone 3B
and a rear zone 71C superimposed on the ear zone 3C. The zones 71A.
71B and 71C are separated from one another by transverse flexion
lines 711 and 713 superimposed on the transverse flexion lines 30
and 32 and which have a flexibility greater than the flexibility of
the zones 71A, 71B and 71C in the same way that the flexion lines
30 and 32.
[0091] The lower face 71 comprises an inner zone 71D superimposed
on the inner zone 3D, a longitudinal central zone 71E superimposed
on the central longitudinal zone 3E and an outer zone 71F
superimposed on the outer region 3F. The zones 71D, 71E and 71F are
separated from one another by transverse flexion lines 715 and 717
superimposed on the transverse flexion lines 38 and 40 and which
have a flexibility greater than the flexibility of the zones 71D,
71E and 71F in the same way that the flexion lines 38 and 40.
[0092] This structure of the inner sole 7 coinciding with the
structure of the outer sole 3 allows improving the flexibility of
the whole of the shoe 1, and making even more effective the ground
supports with different parts of the foot.
[0093] Alternatively, the lower face 71 is formed by a first layer
of the inner sole 7 and the inner sole 7 includes a second layer
73, named upper layer, superimposed on the lower layer 71 and which
is in contact with the foot. According to an optional aspect not
shown, the top layer 73 may include cushions made of materials of
different energy delivery capability, positioned in line with the
zones 71A to 71F using the same geometry and the same principle
that the cushions 50, 52 and 54 of the midsole 5.
* * * * *