Technical field
The invention relates to the insole provided, from the
upper side, with a shaping corresponding to the form of impression of bottom part
of a human foot.
Background art
At present, several different types of inserting or stretching
insoles are used, which should in a most comfortable and suitable manner act upon
the human foot, to render it the most ideal support, and in some cases also to stimulate
some of the ceptors on the sole. These shoemaker's products may be then generally
divided into two groups, which differ in their structure and a manner how they act
upon the human foot.
First of all these are the insoles or bottom leathers,
which contain a layer of a suitable deformable material (e.g. cork), which during
usage temporarily or permanently accommodates to the shape of user's foot. The solution
according to
DE 3406504
belongs to representatives of this group, where the insole besides others
comprises a layer formed by a cork pulp with a soft binding, which during wearing
adjusts to the form of a bottom section of user's foot. Also
JP 2001299408
deals with a similar solution, where one of the insole layers is made
of cork, which after a longer wearing adjusts to the form of bottom sole of the
foot. Nevertheless both these solutions have their disadvantages when to the most
substantial belongs the fact that if the user has a foot which is formed unsuitably,
e.g. the flat-foot, or treads fully on one's foot in an unsuitable manner etc.,
the insole shapes itself so that at a further usage it impairs this defect instead
to improve the quality of user's tread.
Another way how to adjust the insole to the form of a human
foot is to create a relief on an upper surface of the insole which is in contact
with a human foot, which by its form and arrangement rather corresponds to the form
of the sole. The solution according to
GB 1491489
or according to
JP 7039402
belongs among such solutions, when a surface of the insole, which is in
contact with the user's foot, is shaped by means of a system of protrusions and
dimples. The disadvantage of such solutions is that these insoles are shaped in
accordance with a unified form of human foot, hence disregarding an individual shaping,
which features especially in a diversity of forms and inclination of toes so that
in this case the toes of a foot adjust to the structure of the insole while it should
happen, in fact, vice versa.
The structure of insoles of both described types results
in that during their usage - during walking, but also during sporting - all the
muscles of lower limbs are not engaged ideally, neither the weight of a human body
is not distributed ideally between the toe joint, little toe joints and the heel
bone. In these points of foot supports created on the insole the foot is supported
in a fixed manner. At a healthy man with normally shaped foot this leads to an excessive
loading of some muscles or ligaments of a foot, thus to atrophy and shortening of
other not used muscles, to an excessive loading of the toe joint, and in some cases
also to an injury of vascular system in a transversal and longitudinal instep of
the bottom sole of a foot, the result of which is not only an abnormal tiredness,
but also further physical, possibly even psychic problems, that become worse with
the age.
The goal of the invention is to reduce or totally eliminate
the shortcomings of the previous state of the art and to produce an insole enabling
to the user a walking similar to the walking with a bare foot on a sand, grass or
earth regardless the real shape of bottom part of user's foot, this means both for
the user with normally formed foot as well as for a user with a foot which is transverse,
longitudinally or totally flat.
The principle of invention
The goal of the invention has been achieved through the
insole according to the invention, whose principle consists in that the bottom side
of the insole has a form of bottom part of human foot with a smooth toe section.
Such shaping of bottom side of the insole which in fact is negative to shaping of
the upper side of the insole, ensures a quality guiding, position and support of
foot sections subjected to fully treading and springy supporting of soft sections
of the foot, i.e. the longitudinal and transversal instep. At the same time it reduces
energetic demand of walking.
The toe section of the insole with advantage is smooth
from both sides, as shaping of upper side of the insole in its toe section is not
necessary from the point of view of walking comfort of the user.
Simultaneously it is advantageous, if the bottom side of
the insole contains in the heel section a protrusion arranged under the heel dimple
of upper side of the insole, the heel protrusion on the bottom side of the insole
from the outer side of the insole is delimited by deflection of the cuboid bone
arranged under the support of the cuboid bone on the upper side of the insole, the
heel protrusion on the bottom side of the insole continues in a protrusion of longitudinal
splint bone arranged under the dimple of longitudinal splint bone on the upper side
of the insole, the protrusion of longitudinal splint bone on the bottom side of
the insole in the front continues in a protrusion of little toe joints arranged
under the dimple of little toe joints on upper side of the insole, the protrusion
of little toe joints on the bottom side of the insole passes through deflection
of a support of transversal instep towards the inner section of insole into the
protrusion of toe joint arranged under the dimple of toe joint on the upper side
of the insole, while the support of transversal instep creates a springy bridge
between the section of the insole under the toe joint and under the little toe joints,
and towards the heel this support continues in a support of longitudinal instep,
which from the bottom side is created by a deflection of support of longitudinal
instep arranged under the protrusion of support of longitudinal instep on the upper
side of the insole.
Shaping of bottom section of the insole in an above mentioned
manner contributes to a flexible supporting of soft parts of the foot and in a case
of higher physical effort it does not strain the foot in a place of support by an
excessive force acting upon the soft parts of the foot.
For a correct distribution of weight of the user on the
foot it is advantageous if the height of protrusion of little toe joints is smaller
than the height of protrusion of the toe joint. At the same time a greater depth
of dimple of the toe joint could be achieved when compared with the depth of dimple
of little toe joints with respect to the upper surface of the insole.
For an easy formation of the insole shaped according to
the invention it is advantageous if the bottom side of the insole is formed by a
carrying part, in which the shaping is created and on whose upper side there is
arranged the cover layer.
At the same time it is economic advantageous, if the carrying
part of the insole is formed by the cork moulding.
To further increase the user's comfort, it is advantageous,
if between the carrying part and cover layer at least one dilatation layer is inserted.
Description of the drawing
An example of insole embodiment according to the invention
is schematically shown on attached drawings, where the Fig. 1 shows a ground plan
of the insole, the Fig. 2 a cross section II-II of the insole according to the Fig.
1, the Fig. 3 shows a cross section of the insole III-III according to the Fig.
1, the Fig. 4 a cross section IV-IV of the insole according to the Fig. 1, the Fig.
5 shows a cross section V-V of the insole according to the Fig. 1, the Fig. 6 a
cross section VI-VI of the insole according to the Fig. 1, the Fig. 7 a longitudinal
section VII-VII of the insole according to the Fig. 1, the Fig. 8 a longitudinal
section VIII-VIII of the insole according to the Fig. 1, and the Fig. 9 shows a
section of the dilatation layer in an alternative embodiment.
Examples of embodiment
The embodiment of the insole will be explained on the example
of embodiment of an independent inserting insole, nevertheless in other not illustrated
examples of embodiment its principle may be applied also e.g. at the structure of
a stretching insole.
The insole
1
in its ground plan (Fig. 1) by its shape and the size is similar to the shape
and size of a human foot.
From the Fig. 2 to the Fig. 8 it is obvious that the insole
1
in the illustrated example of embodiment is formed by three layers of material.
The bottom side of the insole
1
is formed by a carrying part
2
, on which the dilatation layer
3
is arranged, on which is deposited the covering layer
4
forming the contact part of the insole
1
. In the illustrated and described example of embodiment the covering layer
4
is formed by a natural leather.
Carrying layer
2
of the insole in an advantageous execution is formed by a pressed cork, whose
particles are mutually connected by a binder, nevertheless in other examples of
execution it may be further made of other currently used materials, which to the
carrying part
2
of the insole and due to this to the whole insole
1
impart the ability to absorb impacts arising during walking, and it guarantees
a shape stability of carrying part
2
of the insole.
Shaping of the insole
1
is performed in its carrying part
2. The dilatation layer
3
and covering layer
4
along the whole surface of the insole are of the same thickness. The carrying
part
2
in the toe section of the insole is smooth without shaping both from the upper
as well as bottom side of the insole
1
. On its upper side the front section of the insole
1
is formed by a plane supporting surface
6
for support of foot toes, which towards the heel
11
of the carrying part
2
continuously merges into the dimple
7
of the toe joint, whose size and shape correspond to the size and shape of
a toe joint of a human foot, and into the dimple
8
of little toe joints, whose size and shape correspond to the size and shape
of joints of remaining toes of a human foot, while the shape of the dimple
8
of little toe joints is close to the shape of the L letter. The dimple
7
of toe joint and the dimple
8
of little toe joints are created by a concave deflection of a corresponding
section of the carrying part
2
. In some not illustrated examples of embodiment the dimple 8 of little
toe joints is replaced by several dimples, being shaped separately for each joint
of other toes of a human foot or, e.g. for pairs of these joints, etc. Because of
an arrangement of the toe joint and joints of other toes on the bottom surface of
a human foot, the dimple
7
of the toe joint is positioned with respect to the tip
5
of the insole
1
higher than the dimple
8
of little toe joints, while the dimple
7
of the toe joint is deeper, and with the dimple
8
of little toe joints is interconnected through an elastic support
78
of transversal instep, which is performed by a continuous heightening of their
common edge being shaped according to the transversal instep of a human foot.
The lower part of dimple
7
of the toe joint, the inner edge of dimple
8
of the little toe joints and between them positioned support
78
of transversal instep merge continuously into the support
9
of longitudinal instep, which is performed by a convex deflection of a corresponding
section of the carrying part
2
, while the shape and dimension of the support
9
of longitudinal instep are selected with respect to the longitudinal instep
of a human foot.
The dimple
8
of little toe joints further merges in its lower part through the elastic support
810
of the splint bone performed by a continuous heightening of a common edge into
the dimple
10
of the splint bone, whose size and shape are derived from the size and shape
of longitudinal splint bone of a human foot. The dimple
10
of the splint bone is formed by a concave deflection of a corresponding section
of the carrying part
2
, and it is arranged along the support
8
of longitudinal instep, into which it continuously merges along its whole length.
In vicinity of the heel
11
of carrying part
2
by another concave deflection there is performed the heel dimple
12
, shaped with respect to the heel bone of the foot, while the heel dimple
12
merges in the upper section by means of elastic support
1012
of the heel bone, which is performed by a continuous heightening of a common
edge, into the dimple
10
of the splint bone, and at the same time it continuously merges into the support
9
of longitudinal instep.
In the space between the heel dimple
12
and the dimple
10
of the splint bone, from the edge of carrying part
2
there extends the support
13
of cuboid bone , which is formed by a convex deflection of the carrying part
2
, while the groundplan shape of the support
13
of cuboid bone is close to a triangle, whose peak merges into the support
1012
of the heel bone.
The bottom side
100
of the carrying part
2
of insole is shaped negatively with respect to its upper side, so that on the
bottom side there is performed a relief whose shape corresponds to the shape of
bottom surface of a human foot without toes.
The bottom side
100
of insole
1
contains in the heel section
11
the heel protrusion
121
arranged under the heel dimple
12
of upper side of the insole
1. The heel protrusion
121
on the bottom side of the insole
1
from the outer section of the insole
1
delimited by the deflection
131
of cuboid bone arranged under the support
13
of cuboid bone on upper side of the insole
1. The heel protrusion
121
on bottom side of the insole
1
merges into the protrusion
101
of longitudinal splint bone arranged under the dimple
10
of longitudinal splint bone on upper side of the insole
1
. The protrusion
101
of longitudinal splint bone on bottom side of the insole 1 in front
merges into the protrusion
81
of little toe joints arranged under the dimple
8
of little toe joints on upper side of the insole. The protrusion
81
of little toe joints on bottom side of the insole
1
transfers through deflection
781
of the support
78
of transversal instep towards the inner section of the insole
1
into the protrusion
71
of the toe joint, arranged under the dimple
7
of the toe joint on upper side of the insole
1. The support
781
of transversal instep forms a flexible bridge between the section of insole
1
under the toe joint and under the little toe joints and towards the heel this
support continues into the support
9
of longitudinal instep, which from the bottom side of the insole
1
is formed by deflection
91
of support
9
of longitudinal instep arranged under the protrusion of the support
9
of longitudinal instep on the upper side of the insole
1
.
On bottom side of the insole between the protrusion
81
of little toe joints and the longitudinal protrusion
101
of splint bone there is created the deflection
8101
of the support
810
, which forms a flexible transfer between the section of the insole under the
little toe joints and the section of insole under the splint bone. Between the protrusion
101
of the splint bone and the heel protrusion
121
there is performed a deflection of the support
1012
, which forms a flexible transfer between the section of the insole
1
under the splint bone and the section of insole
1
under the heel. All supports performed on the insole
1
in a flexible manner support the respective section of the foot, while they
are deformable and due to this they do not act upon the soft parts by an excessive
force and do not cause deformations of these parts of foot even at an increased
loading, not even at pathologic status and deformations of the foot, which prevents
occurrence of ischaemic focuses of soft tissue of the foot.
Thickness of the carrying part
2
of the insole within the whole surface of the insole
1
is constant with the exception of the sphere of support
9
of longitudinal instep, in which in a suitable way a thickness of the carrying
part
2
of the insole
1
is increased, which increases strength of the insole
1
in section of the support
9
of longitudinal instep, and as a result of this also the strength, by which
the support
9
supports the longitudinal instep.
The height of protrusion
81
of little toe joints is smaller than the height of protrusion
71
of a toe joint. Through this a greater depth of the dimple
7
of toe joint is reached when compared with depth of the dimple
8
of little toe joints with respect to the upper surface of the insole, and a
correct weight distribution of the user of insole is achieved.
On the upper side of the carrying part
2
, there is applied the dilatation layer
3
, which is with the basic layer joined in a fixed manner - e.g. by bonding.
The dilatation layer
3
is made of a flexible, easily deformable material, while after a certain period
of usage it forms into a suitable shape, corresponding to a shape of a respective
sole of a human foot. In further examples of embodiment the deformability of the
dilatation layer
3
and simultaneously service life of shoemaker's product is increased by performance
of air chambers on a surface of dilatation layer
3
, which adjoins to an upper side of the carrying part
2
, while these air chambers, which are mostly of a round-head shape extend into
the material of carrying layer
2
, and cause that deformation of the dilatation layer
3
is a temporary one and after relieving the dilatation layer
3
gets its original shape. In illustrated example of embodiment the dilatation
layer
3
is formed by two layers of flexible material, while the air chambers
33
are performed in lower dilatation layer
31
, and they are closed by the upper dilatation layer
32
. Thickness of the dilatation layer
3
is within the whole surface of the insole
1
constant, so that the dilatation layer
3
deposited on upper side of the carrying part
2
is copying its surface and it is shaped in the same way as its upper side.
On the dilatation layer
3
there is further deposited the cover layer
4
, whose task besides the drainage of moisture, which is originated during wearing
inside the footwear, is to render a comfort contact with user's foot, while the
material of cover layer
4
meets these requirements, and with advantage it is the natural leather. Thickness
of the cover layer
4
within the whole surface of the insole
1
is constant, so that it is copying the surface of dilatation layer
3
and of the carrying part
2
.
In the non illustrated example of embodiment there are
passing through the layers of footwear product, especially in the area of the support
9
of longitudinal instep, the perforations, that increase moisture drainage and
enable circulation of air through the shoemaker's product, especially the independent
inserting insole.
At some advantageous embodiments on the free lower surface
of the carrying part
2
there is applied an absorption layer, whose task is to drain the moisture from
other layers of shoemaker's product and to increase the comfort at its usage.
Applicability
The insole according to this invention could be used for
a common outdoor footwear, working footwear and especially winter footwear. Next
to this, it can be used in a health footwear and sports footwear, possibly in footwear
for professional drivers.
List of referential marking
- 1
- insole
- 100
- bottom side of the insole
- 2
- carrying part
- 3
- dilatation layer
- 31
- lower dilatation layer
- 32
- upper dilatation layer
- 33
- air chambers
- 4
- cover layer
- 5
- tip
- 6
- supporting surface for support of toes
- 7
- dimple of the toe joint
- 71
- protrusion of the toe joint
- 78
- support of transversal instep
- 781
- deflection of support of transversal instep
- 8
- dimple of the little toe joints
- 81
- protrusion of the little toe joints
- 810
- support of the splint bone
- 8101
- deflection of support of the splint bone
- 9
- support of longitudinal instep
- 91
- deflection of support of longitudinal instep
- 10
- dimple of the splint bone
- 101
- protrusion of the splint bone
- 1012
- support of the heel bone
- 11 I
- heel
- 12
- heel dimple
- 121
- heel protrusion
- 13
- support of the cuboid bone
- 131
- deflection of support of the cuboid bone
