U.S. patent application number 11/423453 was filed with the patent office on 2007-12-13 for fabric construction specifically for damper.
Invention is credited to Hiroshi Ohara.
Application Number | 20070287344 11/423453 |
Document ID | / |
Family ID | 38822533 |
Filed Date | 2007-12-13 |
United States Patent
Application |
20070287344 |
Kind Code |
A1 |
Ohara; Hiroshi |
December 13, 2007 |
Fabric Construction Specifically For Damper
Abstract
The present invention provides a fabric structure specifically
for dampers. Its major feature is to weave metal yarns with
non-metal yarns into a fabric body, which, after proper production
steps, is then molded into dampers. Such a damper structure
incorporating metal yarns may greatly enhance the mechanical
properties of dampers, as well as improve the manufacturing yield
and tear-resistance performance of the product. The metal yarns and
non-metal yarns may be woven in various ways of arrangement,
depending on the objective design requirement of the damper, so as
to obtain the same or different strength and mechanical
properties.
Inventors: |
Ohara; Hiroshi; (Taouyuan
Hsien, TW) |
Correspondence
Address: |
LIN & ASSOCIATES INTELLECTUAL PROPERTY, INC.
P.O. BOX 2339
SARATOGA
CA
95070-0339
US
|
Family ID: |
38822533 |
Appl. No.: |
11/423453 |
Filed: |
June 12, 2006 |
Current U.S.
Class: |
442/2 |
Current CPC
Class: |
Y10T 442/102 20150401;
H04R 9/043 20130101; D03D 15/593 20210101; D10B 2101/20 20130101;
D03D 13/00 20130101; D03D 13/002 20130101 |
Class at
Publication: |
442/2 |
International
Class: |
D04H 1/00 20060101
D04H001/00 |
Claims
1. A fabric structure specifically for dampers, comprising a
plurality of metal yarns and a plurality of non-metal yarns,
wherein said metal yarns are interwoven with said non-metal yarns
into a fabric body.
2. The fabric structure specifically for dampers as claimed in
claim 1, wherein the number of said non-metal yarns is greater than
the number of said metal-yarns in said fabric body.
3. The fabric structure specifically for dampers as claimed in
claim 1, wherein said metal yarns are arranged in a grid, and an
appropriate number of said non-metal yarns are positioned between
two of said metal yarns and parallel thereto.
4. The fabric structure specifically for dampers as claimed in
claim 1, wherein said metal yarns are woven radially into said
non-metal yarns.
5. The fabric structure specifically for dampers as claimed in
claim 4, wherein dampers manufactured with said fabric body having
said metal yarns radiate from the center of the damper.
6. The fabric structure specifically for dampers as claimed in
claim 1, wherein said non-metal yarns are arranged in a grid, while
said metal yarns interlace with said non-metal yarns diagonally.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention generally relates to loudspeakers, and
more particularly to a fabric construction for dampers of
loudspeakers.
[0003] 2. The Prior Arts
[0004] FIG. 1 depicts a typical moving-coil loudspeaker
construction which comprises a driving system, a diaphragm, and a
suspension system. The driving system further includes a permanent
magnet A, an upper pole piece B, a gap C and a voice coil D.
Aforementioned diaphragm E is a vibrating lamina for moving air,
normally shaped like a cone or dome basket. The suspension system
includes a damper F and a lateral suspension construction, and is
responsible for the traction of directional movement of diaphragm
E.
[0005] The driving mechanism of aforementioned loudspeaker is as
below. When the electric current flows through the voice coil D, an
electromagnetic field is induced. The electromagnetic field is at
right angle with the magnetic field of the permanent magnet A of
the speaker such that the voice coil D experiences forces and thus
moves within gap C (the gap between the voice coil D and the magnet
A). The mechanic force of the movement causes the diaphragm E
attached to the voice coil D to move (vibrate) perpendicularly
upward and downward, which in turn vibrates the air and produces
acoustic frequency to human ears. In this way, sound is reproduced
for hearing.
[0006] Though other types of loudspeakers may be structured
differently, they have the same driving mechanism, and include at
least dampers for suspending diaphragms and voice coils.
[0007] Please refer to FIG. 2 for illustration. Because dampers are
mainly used for suspending voice coils and diaphragms, they are
generally structured with a plurality of alternating concentric
peaks and valleys. That is, their cross section exhibits a wave
contour, which enables the dampers to act like shock-absorbent
springs while suspending voice coils and diaphragms at the same
time. Hence, the elasticity and strength of dampers may directly
influence the amplitude of diaphragm vibration, and accordingly
influence the acoustic effect.
[0008] Conventional dampers utilize a fabric body woven with
non-metal yarns (such as nylon, silk, etc.) The fabric body is
resinated, dried, and then integrally molded into dampers.
Accordingly, dampers manufactured in this way have lower strength
and low tear-resistance performance, which renders the dampers
susceptible to be deformed and consequently influences the acoustic
output quality of speakers. In another aspect, the structure of
conventional damper fabric makes it difficult to improve the
stretch and water-proof performance of dampers. Also, heat
generated after prolonged operation of the speaker can not be
conducted and dissipated rapidly as well.
SUMMARY OF THE INVENTION
[0009] To improve such mechanical disadvantages as low strength,
low tear-resistant performance, low heat conduction, low stretch
and waterproof performance of dampers manufactured with fabric
woven exclusively with non-metal yarns, a fabric structure which
obviates aforementioned disadvantages without sacrificing the
elasticity required for dampers is provided herein.
[0010] The main feature of the present invention is to add metal
yarns properly into the fabric for manufacturing dampers in a way
such that said metal yarns are incorporated as part of the fabric
body, so that when the fabric is molded into dampers, the metal
yarns may enhance the various mechanical properties of dampers.
[0011] The major technical means of the present invention is to
weave non-metal yarns with metal yarn into a fabric body. The woven
fabric is processed further and then molded into a desired damper
form.
[0012] A further technical means of the present invention is to
arrange the metal yarns woven into the fabric body in a grid, with
a plurality of non-metal yarns positioned between two metal yarns
and parallel thereto.
[0013] A still further technical means of the present invention is
to arrange metal yarns woven in a non-metal yarns fabric body
radially such that when the damper is molded, said metal yarns may
radiate from the center of the damper.
[0014] An even further technical means of the present invention is
to arrange non-metal yarns woven in the fabric body in a grid, with
metal yarns interlacing with said non-metal yarns
non-perpendicularly.
[0015] In sum, the present invention provides a fabric structure
specifically for dampers. Its major feature is to weave metal yarns
with non-metal yarns into a fabric body, which, after proper
production steps, is then molded into dampers. Such a damper
structure incorporating metal yarns may greatly enhance many
mechanical properties of dampers, as well as improve the
manufacturing yield and tear-resistance performance of the product.
Said metal yarns and non-metal yarns may be woven with various ways
of arrangement, depending on the objective design requirement of
the damper, to obtain the same or different strength and mechanical
properties.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The present invention will be apparent to those skilled in
the art by reading the following detailed description with
reference to the attached drawings, in which:
[0017] FIG. 1 is a sectional plan view of a conventional
moving-coil loudspeaker construction;
[0018] FIG. 2 is a perspective cutaway view of a damper
construction in accordance with the present invention;
[0019] FIG. 3 is a schematic plan view of a fabric body in
accordance with a first embodiment of the present invention,
wherein metal yarns are arranged in a grid, with a number of
non-metal yarns positioned between two metal yarns and parallel
thereto;
[0020] FIG. 4 is a schematic plan view of a fabric body in
accordance with a second embodiment of the present invention,
wherein metal yarns are woven radially into a non-metal yarn fabric
body;
[0021] FIG. 5 is a schematic plan view of a fabric body in
accordance with a third embodiment of the present invention,
wherein non-metal yarns are arranged in a grid, with metal yarns
arranged diagonally and interlacing with said non-metal yarns;
[0022] FIG. 6 is a schematic plan view of a fabric body in
accordance with a fourth embodiment of the present invention,
wherein non-metal yarns are arranged in a grid, with metal yarns
intersecting each other and interlacing with said non-metal yarns
non-perpendicularly; and
[0023] FIG. 7 is a perspective view of a damper molded with the
fabric body illustrated in FIG. 4.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0024] FIG. 3 depicts a fabric body 1 manufactured specifically for
loudspeaker dampers in accordance with a first embodiment of the
present invention. The fabric body 1 may be woven with any
applicable non-metal yarns, and is manufactured into a damper F as
illustrated in FIG. 2 through such production steps as resination,
drying, press-molding and trimming. The fabric body 1 in accordance
with the present invention has a structure similar to that of a
common fabric, and allows patterns or designs to be formed
thereon.
[0025] FIG. 3 also illustrates the structure of the fabric body in
accordance with the present invention, wherein metal yarns 10 are
interwoven with non-metal yarns 11. The number of the non-metal
yarns 11 is greater than the number of metal yarns 10 so as to
retain proper softness and elasticity required for dampers. If the
number of metal yarns 10 is greater than the number of non-metal
yarns 11, the damper manufactured accordingly may be too stiff. In
the embodiment illustrated in FIG. 3, the metal yarns 10 are
arranged in a grid, with a number of non-metal yarns 11 positioned
between two metal yarns 10 and parallel thereto.
[0026] FIG. 4 illustrates the fabric body 1 according to a second
embodiment of the present invention, wherein metal yarns 10 are
interwoven with non-metal yarns 11 in a way so that the metal yarns
10 are arranged radially in the non-metal yarn fabric. Such a
structure allows damper F to be molded with metal yarns 10
radiating from the center thereof as illustrated in FIG. 7, which
enhances not only the strength but also the exquisiteness of the
damper.
[0027] FIG. 5 illustrates the fabric body according to a third
embodiment of the present invention, wherein metal yarns 10 are
interwoven with non-metal yarns 11 in a way so that non-metal yarns
11 are arranged in a grid, whereas metal yarns 10 are arranged
unidirectionally and diagonally, and interlace with said non-metal
yarns 11.
[0028] FIG. 6 illustrates the fabric body according to a fourth
embodiment of the present invention, wherein metal yarns 10 are
interwoven with non-metal yarns 11 in a way so that non-metal yarns
11 are arranged in a grid, whereas metal yarns 10 are arranged
diagonally in two directions and interlace with the non-metal yarns
11.
[0029] The aforementioned fabric structure incorporating both
metal-yarns and non-metal yarns in accordance with the present
invention has the following advantages.
[0030] Firstly, it may enhance the strength of dampers and thus
prevents the damper from being deformed by great force and
consequently influencing sound quality when the speaker is
energized with great power.
[0031] Secondly, it may enhance the anti-fatigue performance of
dampers and lengthens the operation life accordingly.
[0032] Thirdly, interweaving non-metal yarns with metal-yarns may
enhance damper strength without sacrificing the softness and
elasticity required for dampers.
[0033] Additionally, interweaving non-metal yarns with metal yarns
may enhance the stretch and waterproof performance of dampers.
[0034] Furthermore, interweaving non-metal yarns with metal yarns
may enhance the heat-dissipating efficiency of dampers, so that the
heat produced during speaker operation may be dissipated
rapidly.
[0035] Although the present invention has been described with
reference to the preferred embodiments thereof, it is apparent to
those skilled in the art that a variety of modifications and
changes may be made without departing from the scope of the present
invention which is intended to be defined by the appended
claims.
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