U.S. patent application number 12/418599 was filed with the patent office on 2010-09-16 for shoe insole.
Invention is credited to Hsin-Wu Lin.
Application Number | 20100229423 12/418599 |
Document ID | / |
Family ID | 42729512 |
Filed Date | 2010-09-16 |
United States Patent
Application |
20100229423 |
Kind Code |
A1 |
Lin; Hsin-Wu |
September 16, 2010 |
SHOE INSOLE
Abstract
A shoe insole is injection molded from composite materials, the
composite materials includes 62%-80% by weight of nylon and 20%-38%
by weight of short fiber material.
Inventors: |
Lin; Hsin-Wu; (Fongyuan
City, TW) |
Correspondence
Address: |
Dr. BANGER SHIA;Patent Office of Bang Shia
102 Lindencrest Ct
Sugar Land
TX
77479-5201
US
|
Family ID: |
42729512 |
Appl. No.: |
12/418599 |
Filed: |
April 5, 2009 |
Current U.S.
Class: |
36/44 ;
36/43 |
Current CPC
Class: |
A43B 7/146 20130101;
A43B 17/14 20130101 |
Class at
Publication: |
36/44 ;
36/43 |
International
Class: |
A43B 13/38 20060101
A43B013/38 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 16, 2009 |
TW |
098108365 |
Claims
1. A shoe insole being injection molded from composite materials,
the composite materials comprising: 62%-80% by weight of nylon and
20%-38% by weight of short fiber material.
2. The shoe insole as claimed in claim 1, wherein the short fiber
material is selected from glass fiber and carbon fiber.
3. The shoe insole as claimed in claim 2, wherein a length of the
short fiber material is 3 mm to 5 mm.
4. The shoe insole as claimed in claim 1, wherein the short fiber
material is arranged in the composite material in an irregular
direction.
5. The shoe insole as claimed in claim 2, wherein the short fiber
material is arranged in the composite material in an irregular
direction.
6. The shoe insole as claimed in claim 3, wherein the short fiber
material is arranged in the composite material in an irregular
direction.
7. The shoe insole as claimed in claims 1, wherein a shoe insole is
formed in a sole shape and includes a ball portion, a foot arch
portion, and a heel portion, and the foot arch portion and the heel
portion are designed to raise slightly.
8. The shoe insole as claimed in claims 2, wherein a shoe insole is
formed in a sole shape and includes a ball portion, a foot arch
portion, and a heel portion, and the foot arch portion and the heel
portion are designed to raise slightly.
9. The shoe insole as claimed in claims 3, wherein a shoe insole is
formed in a sole shape and includes a ball portion, a foot arch
portion, and a heel portion, and the foot arch portion and the heel
portion are designed to raise slightly.
10. The shoe insole as claimed in claims 4, wherein a shoe insole
is formed in a sole shape and includes a ball portion, a foot arch
portion, and a heel portion, and the foot arch portion and the heel
portion are designed to raise slightly.
11. The shoe insole as claimed in claims 5, wherein a shoe insole
is formed in a sole shape and includes a ball portion, a foot arch
portion, and a heel portion, and the foot arch portion and the heel
portion are designed to raise slightly.
12. The shoe insole as claimed in claims 6, wherein a shoe insole
is formed in a sole shape and includes a ball portion, a foot arch
portion, and a heel portion, and the foot arch portion and the heel
portion are designed to raise slightly.
13. The shoe insole as claimed in claim 7, wherein on a lower
surface of the foot arch portion and the heel portion is formed at
least one rib extending along a length direction of the shoe
insole.
14. The shoe insole as claimed in claim 8, wherein on a lower
surface of the foot arch portion and the heel portion is formed at
least one rib extending along a length direction of the shoe
insole.
15. The shoe insole as claimed in claim 9, wherein on a lower
surface of the foot arch portion and the heel portion is formed at
least one rib extending along a length direction of the shoe
insole.
16. The shoe insole as claimed in claim 10, wherein on a lower
surface of the foot arch portion and the heel portion is formed at
least one rib extending along a length direction of the shoe
insole.
17. The shoe insole as claimed in claim 11, wherein on a lower
surface of the foot arch portion and the heel portion is formed at
least one rib extending along a length direction of the shoe
insole.
18. The shoe insole as claimed in claim 12, wherein on a lower
surface of the foot arch portion and the heel portion is formed at
least one rib extending along a length direction of the shoe
insole.
19. The shoe insole as claimed in claim 1, wherein the shoe insole
includes an upper and a lower surfaces, and a plurality of bosses
are formed on the upper surface of the shoe insole.
20. The shoe insole as claimed in claim 19, wherein a largest
deformation rate of the ball portion is within 20%-35%, and a
largest deformation rate of the foot arch portion and the heel
portion is within 10%-25%.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a shoe insole, and more
particularly to a shoe insole that has a suitable hardness and
flexibility.
[0003] 2. Description of the Prior Art
[0004] A shoe insole includes an anti-friction outsole, an
anti-vibration a midsole and a shoe vamp.
[0005] An outsole or midsole of a conventional bicycle riding shoes
includes a multi-layer fiber material with high hardness to protect
a sole of the foot. To facilitate force of the sole by using a ball
portion and a foot arch, a hell portion is designed to raise
slightly. Also, to abut the hell portion against a pedal of a
bicycle, a hook member is disposed on a lower side of an outsole.
TW Patent No. M338207 discloses that an outsole includes a base
layer and a reinforcement layer to enhance strength of the outsole.
However, such a bicycle riding shoe can not be used to walk
comfortably because of the raised hell portion, limiting its
usage.
[0006] To improve abovementioned defects, a safety shoe insole is
disclosed in the TW Patent No. 273234, wherein an adhesive with
flexibility is formed between a plurality of safety shoe insoles to
provide an anti-impact function. Likewise, the TW Patent No. 290677
discloses that between two clamp layers is defined a plastic layer
to provide flexibility. The TW Patent No. M347839 disclosed that a
PU glue is coated among a number of polyester fiber layers, and the
PU glue is mixed with hard particles to prevent pointed articles
from piercing through the shoe. In addition, a polymer layer made
of polyurethane is adhered with a fiber layer to reinforce
mechanical strength.
[0007] Nevertheless, abovementioned patents all have to provide
with at least two layer members, causing complicate manufacturing
process and high production cost.
SUMMARY OF THE INVENTION
[0008] The primary object of the present invention is to provide a
shoe insole that can has a suitable hardness and flexibility.
[0009] A shoe insole in accordance with the present invention is
injection molded from composite materials, the composite materials
comprises: 62%-80% by weight of nylon and 20%-38% by weight of
short fiber material.
[0010] Thereby, as riding a bicycle, the shoe insole can be placed
into the shoe easily to reinforce support capacity, hardness, and
rigidity to the foot. A proportion of the short fiber material is
limited within 20% to 38% to prevent insufficient hardness and
support capacity and energy consumption.
[0011] The shoe insole of the present invention can be applied in
dangerous condition and can be also served as a protective layer to
protect the sole of foot.
[0012] In addition, the shoe insole is light weight, removable and
replaceable to be used in different environments.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] FIG. 1 is a schematic view showing the manufacturing process
of a shoe insole in accordance with the present invention;
[0014] FIG. 2 is a perspective view of the shoe insole in
accordance with a preferred embodiment of the present
invention;
[0015] FIG. 3 is a side plan view of the shoe insole in accordance
with the preferred embodiment of the present invention;
[0016] FIG. 4 is another perspective view of the shoe insole in
accordance with the preferred embodiment of the present
invention;
[0017] FIG. 5 is a perspective view showing composite material of
the present invention being forced to deform;
[0018] FIG. 6 is an operational view of the shoe insole in
accordance with the preferred embodiment of the present
invention;
[0019] FIG. 7 is another operational view of the shoe insole in
accordance with the preferred embodiment of the present
invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0020] The present invention will be clearer from the following
description when viewed together with the accompanying drawings,
which show, for purpose of illustrations only, the preferred
embodiment in accordance with the present invention.
[0021] Referring to FIGS. 1, 1A, and 2, a shoe insole with hardness
and flexibility in accordance with the present invention is
injection molded from composite materials. The composite materials
includes 62%-80% by weight of nylon and 20%-38% by weight of short
fiber material, wherein less than 1 weight percent concentration of
additions can be added as required. The abovementioned nylon is
selected from nylon 6 and nylon 66, and the short fiber material is
selected from glass fiber and carbon fiber. A preferred length of
the short fiber material is 3 mm to 5 mm.
[0022] As shown in FIG. 1, a substantial method for making a shoe
insole includes melting nylon plastic pellets mixed with short
fiber material by heating so that the short fiber material is
equally mixed with the nylon plastic pellets, and encapsulating the
melted mixed nylon and short fiber material into a mold. After
molding, the shoe insole is finished. Thereby, the advantages of
the present invention, such as a simple manufacturing process, a
lower production cost, can be achieved.
[0023] As illustrated in FIGS. 2-4, a molded shoe insole 1 is
formed in a sole shape, the shoe insole 1 includes an upper surface
and a lower surface, and further includes a ball portion 10, a foot
arch portion 20, and a heel portion 30, wherein to satisfy a
bicycle-riding condition, the foot arch portion 20 and the heel
portion 30 are designed to raise slightly, e.g., between the foot
arch portion 20, the heel portion 30, and the ball portion 10 forms
a suitable included angle, wherein a largest deformation rate of
the ball portion 10 is within 20%-35%, and a largest deformation
rate of the foot arch portion 20 and the heel portion 30 is within
10%-25%, thereby the shoe insole 1 has a suitable loading capacity
to facilitate ball portion's force as walking. Referring to FIG. 5,
the abovementioned deformation rate means that as a 3 mm of shoe
insole is forced and not be broken, a largest deformation of a
thickness direction is a, and a largest deformation of a length is
b. A relation between a and b denotes as follows:
( a b .times. 100 % ) ##EQU00001##
[0024] Moreover, to reinforce the structure of the shoe insole, on
a lower surface of the foot arch portion 20 and the heel portion 30
is formed at least one rib 40 extending along a length direction of
the shoe insole 1, a preferred number of the ribs is two or three,
and the ribs 40 allow to match a curve line of the shoe insole to
be formed in a slight curve shape, wherein a thickness of the shoe
insole 1, on which are arranged the ribs 40, is approximately 4 mm
to 6 mm, and the rest portion of the shoe insole 1 is about 3 mm so
as to enhance insole's strength and lower its weight. Likewise, a
side periphery of the shoe insole 1 allows to be further chamfered
to prevent generating a sharp-pointed periphery.
[0025] Referring further to FIG. 6, the shoe insole 1 is directly
placed in a shoe 5 to be stepped by a user, and because a plurality
of bosses 41 are formed on an upper surface of the shoe insole 1 to
abut against user's ball portion, obtaining an anti-slip function.
Besides, the reflex nerve in the sole of the foot is stimulated to
exercise and be massaged, and the user's sole will not completely
contact with the shoe insole, enhancing air permeability.
[0026] As illustrated in FIG. 7, after the shoe insole 1 is placed
in the shoe 5, another shoe insole 6 is placed into the shoe, or an
air permeable foam layer is additionally adhered onto the shoe
insole 1 so that the user can wear the shoe comfortably.
[0027] From abovementioned descriptions, the nylon and the short
fiber material are mixed together at an appropriate proportion, and
because the short fiber material is arranged in an irregular
direction to cross with the nylon in the shoe insole, the short
fiber material can be used to reinforce hardness and rigidity.
Under a test, the composite materials made from the nylon and the
short fiber material can be up to 1600 kgf/cm.sup.2 in a tensile
strength (according to ASTM D-638 standard) and be up to 2500
kgf/cm.sup.2 in a flexural strength (according to ASTM D-790
standard), and a hardness grade for Rockwell R can be up to 120
(according to D-785 standard). Therefore, the mechanical strength
of the shoe insole of the present invention is more excellent than
that of conventional shoe insole, and a rate of recovery to the
deformation is less than 5%.
[0028] Thereby, as riding a bicycle, the shoe insole can be placed
into the shoe easily to reinforce support capacity, hardness, and
rigidity to the foot. Since a proportion of the short fiber
material is limited within 20% to 38%, preventing insufficient
hardness and support capacity and energy consumption.
[0029] The shoe insole of the present invention can be applied in
dangerous condition and can be also served as a protective layer to
protect the sole of foot.
[0030] In addition, the shoe insole is light weight, removable and
replaceable to be used in different environments.
[0031] While we have shown and described various embodiments in
accordance with the present invention, it is clear to those skilled
in the art that further embodiments may be made without departing
from the scope of the present invention.
* * * * *