close

Вход

Забыли?

вход по аккаунту

?

JP2009021832

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2009021832
The present invention relates to a speaker diaphragm and a speaker using the same, and it is an
object of the present invention to provide a speaker diaphragm having high strength and
excellent vibration characteristics in a high frequency range and a speaker using the same. It is In
order to achieve this object, according to the present invention, there is provided a woven fabric
1 in which a thermosetting resin impregnated is in a thermosetting state, and a paper board 2
integrated by thermocompression bonding on the back side of the woven fabric 1. And the woven
fabric 1 is a speaker diaphragm having a textured surface exposed on the surface side, and the
woven fabric 1 is used, so the strength is high, and the thermosetting resin impregnated in the
woven fabric 1 Since the conductive resin is in a thermosetting state, it is possible to provide a
speaker diaphragm having high hardness and excellent vibration characteristics in the high
frequency range, and a speaker using the same. [Selected figure] Figure 3
Speaker diaphragm and speaker using the same
[0001]
The present invention relates to a speaker diaphragm and a speaker using the same.
[0002]
Although the paper-plate-like thing using a natural fiber is generally used for the diaphragm for
speakers used for the speaker of various audio equipments, strength lack was mentioned as a
problem.
[0003]
10-05-2019
1
Therefore, it has been proposed to use a woven fabric of high-strength fibers such as aramid
fibers, carbon fibers, glass fibers and the like to have natural fibers and chemical fibers entwined
and shaped to enhance the strength.
[0004]
The technology related to this is described in Patent Document 1 below.
Japanese Utility Model Application Publication No. 63-70786
[0005]
The problem with the above conventional example is that although the strength is high,
improvement of the vibration characteristic of the high tone range has been desired.
[0006]
That is, natural fibers and chemical fibers entangled in a woven fabric of high strength fibers
such as aramid fibers, carbon fibers and glass fibers are formed into a plate by press molding,
and the strength is not high, The vibration characteristics of the high range were not satisfactory.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to provide a speaker
diaphragm having high strength and excellent vibration characteristics in a high frequency
range, and a speaker using the same.
[0008]
And in order to achieve this object, the present invention comprises a woven fabric in which a
thermosetting resin impregnated is in a thermosetting state, and a paper board integrated by
thermocompression bonding on the back side of the woven fabric; The texture is exposed on the
front side.
[0009]
As described above, the present invention comprises a woven fabric in which a thermosetting
10-05-2019
2
resin impregnated is in a thermosetting state, and a paper board integrated by
thermocompression bonding on the back side of the woven fabric, the woven fabric being woven
on the surface side It is a diaphragm for speakers that has an eye out, and it is high in strength
because it uses a woven fabric, and because the thermosetting resin impregnated in this woven
fabric is in a thermosetting state, its hardness is high. Therefore, it is possible to provide a
speaker diaphragm that is excellent in vibration characteristics in a high range and a speaker
using the same.
[0010]
An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
[0011]
As shown in FIG. 1, in the loudspeaker according to the present embodiment, a magnetic circuit
11 having a cylindrical magnetic gap 10 and a cylindrical conductive wire 12 are movably
disposed in the magnetic gap 10 of the magnetic circuit 11. A cylindrical voice coil 13, a discshaped diaphragm 14 whose inner peripheral portion is connected to the outer portion of the
magnetic gap 10 of the voice coil 13, and connection of the diaphragm 14 to the voice coil 13 A
planar shape having a ring-shaped first edge 16 in which a portion other than the portion is held
by the upper surface opening portion of the dish-shaped frame 15 is provided.
[0012]
Further, the lead wire 17 from the conducting wire 12 of the voice coil 13 is not in contact with
the diaphragm 14 from the portion (middle portion) between the diaphragm 14 connecting
portion of the voice coil 13 and the portion disposed inside the magnetic gap 10. It is pulled out
to the frame 15 in the state.
[0013]
Furthermore, a planar shape formed by an elastic body connects one end side of the ring-shaped
second edge 18 to a portion of the voice coil 13 between the lead-out portion of the lead wire 17
and the portion disposed in the magnetic gap 10 The other end side of the second edge 18 is in
contact with the inner surface middle portion of the frame 15.
[0014]
The second edge 18 and the first edge 16 are formed of an elastic material such as urethane or
rubber, but the second edge 18 is downward and the first edge 16 is upward. It has a shape
projecting in the opposite direction.
10-05-2019
3
[0015]
In addition, a hard suspension holder 19 having a ring shape in plan view is integrated with an
adhesive on the upper surface (surface on the diaphragm 14 side) in the vicinity of the
connection portion of the second edge 18 to the voice coil 13.
[0016]
Furthermore, the connection portion of the second edge 18 to the voice coil 13 protrudes inward
from the suspension holder 19 as shown in FIG. 2, and this protrusion 18 a is a portion of the
second edge 18 connected to the frame 15. It is thinner than the connecting portion (18b in FIG.
1).
[0017]
The lead wire 17 is in the form of a stranded wire called a gold wire, and its inner end is
electrically connected to the tip (not shown) of the lead 12 on the central outer peripheral
surface of the voice coil 13 by the solder 20 as shown in FIG. , Mechanically connected.
[0018]
The speaker assembly shown in FIG. 1 first mounts the magnetic circuit 11 in the frame 15 and
then mounts the second edge 18 in the frame 15 and then the lower end of the voice coil 13
from above the frame 15 as the second edge The lead 18 is inserted downward through the
opening 18 and the lead 12 is held in place on the magnetic gap 10 (note that the suspension
holder 19 is already glued to the top side of the second edge 18 by the adhesive). ing).
[0019]
Thereafter, the adhesive 21 is dropped from above the protrusion 18 a of the second edge 18 so
as to cover the suspension holder 19, the protrusion 18 a of the second edge 18, and the
suspension holder 19 in the vicinity thereof. Thus, the suspension holder 19 is held and
integrated with the voice coil 13.
[0020]
In the above assembly, the conducting wire 12 is wound around the lower end outer periphery of
the voice coil 13. Therefore, the outer diameter of the voice coil 13 in this portion is larger in
outer diameter than in the middle and the upper part.
10-05-2019
4
[0021]
However, since the second edge 18 is formed of an elastic body, the second edge 18 can pass the
conductor 12 portion of the voice coil 13 in a state where the opening portion is elastically
expanded and deformed. And after passing, it will be in close contact with the outer peripheral
surface of the middle portion of the voice coil 13 in a state of being elastically reduced in
diameter.
[0022]
For this reason, even when the adhesive 21 for fixing the voice coil 13 and the suspension holder
19 is applied from above, the protrusion of the second edge 18 in close contact with the outer
peripheral surface of the middle portion of the voice coil in an elastically contracting manner. By
the portion 18a, a part of the adhesive 21 does not flow down below the second edge 18, and
hence the movement of the voice coil 13 is not hindered.
[0023]
In addition, since the projecting portion 18a of the second edge 18 is in a thin-walled state, the
elastic diameter expansion deformation and the elastic diameter reduction deformation can be
further easily performed in combination with the formation of the elastic portion. The effect of
restraining movement of the coil 13 is further ensured (the protrusion 18a of the second edge 18
is in contact with the outer peripheral surface of the voice coil 13 over a wide area in a state of
being bent downward as shown in FIG. 2) To prevent the flow of the adhesive 21).
[0024]
Subsequently, wiring connection of the lead wire 17 is performed, and then the inner periphery
of the diaphragm 14 is penetrated to the upper outer periphery of the voice coil 13, the upper
outer periphery of the voice coil 13 and the inner periphery of the diaphragm 14. The part and
the ring-shaped first edge 16 are respectively fixed with an adhesive.
[0025]
Finally, the upper end of the voice coil 13 is covered with a dust cap 22 to complete the
assembly.
[0026]
In the speaker completed through the above steps, the first edge 16 is shaped to project upward
as shown in FIG. 1, and the second edge 18 is directed downward as shown in FIG. The voice coil
10-05-2019
5
is formed in a projecting shape, that is, by forming the first edge 16 and the second edge 18
supported on the upper and middle portions of the voice coil 13 against the frame 15,
respectively. The movable loads in the upper and lower directions of 13 are approximated.
[0027]
Accordingly, the upward and downward movement of the diaphragm 14 is the same, and as a
result, a speaker with less distortion can be obtained.
[0028]
The diaphragm 14 of the present embodiment has a structure as shown in FIG.
[0029]
That is, it comprises a woven fabric 1 in which a thermosetting resin impregnated is in a
thermosetting state, and a paper board 2 which is thermocompression-bonded and integrated on
the back surface side (lower surface side in FIG. 1) of the woven fabric. On the surface side, a
weave (5 in FIG. 4) in which the warp yarn 3 and the weft yarn 4 weave is exposed.
[0030]
The woven fabric 1 is a woven fabric containing at least one of an aramid fiber, a polyester fiber,
an acrylic fiber, a cotton fiber, a carbon fiber, a glass fiber, and a silk fiber.
[0031]
Further, the woven fabric 1 is a woven fabric containing synthetic fibers, the paper board 2 is a
paper board containing synthetic fibers, and the woven fabric 1 and synthetic fibers contained in
the paper board 2 are heat-sealed together. The integrated strength of the cloth 1 and the paper
board 2 may be increased.
[0032]
Further, the woven fabric 1 is in a state in which a thermosetting resin is present in the inner
portion and the outer peripheral portion of each of the warp 3 and the weft 4, and the warp 3
and the weft 4 itself by thermosetting of the thermosetting resin. And the woven fabric 1 which
has woven them is in a cured state.
[0033]
10-05-2019
6
In addition, as a thermosetting resin, resin containing at least one of a phenol resin, an acrylic
resin, an epoxy resin, and a vinyl ester resin can be used.
[0034]
Hereinafter, a method of manufacturing the diaphragm 14 will be described.
[0035]
FIG. 5 shows the upper mold 6 and the lower mold 7 for forming the diaphragm 14.
[0036]
The upper mold 6 has a frusto-conical shape that protrudes downward, and the lower mold 7 has
a dish shape that receives the frusto-conical shape of the upper mold 6 downward, and these
upper molds Although not shown, a heater for heating is embedded in the lower mold 7.
[0037]
The upper mold 6 and the lower mold 7 are prepared. First, the upper mold 6 is largely
separated in the upper direction of the lower mold 7.
[0038]
Then, from this state, the tray 8 is placed on the lower mold 7 as shown in FIG.
[0039]
The net 8 is in a state where pulp fibers for making the paper board 2 are scooped from the pulp
solution, and a pulp fiber layer 8 a is provided on the net 8.
[0040]
From this state, next, as shown in FIG. 6, the flat woven fabric 9 before emboss the woven fabric
1 is disposed between the upper mold 6 and the lower mold 7.
[0041]
Then, from this state, the upper mold 6 is pushed down to the lower mold 7 as shown in FIG. 7,
and the woven fabric 9 and the pulp fiber layer 8a are pressurized and compressed, and heated
in this state at 180 ° C to 250 ° C. As a result, the diaphragm 14 shown in FIGS. 3 and 4 is
10-05-2019
7
formed.
[0042]
In this state, the woven fabric 1 and the paper board 2 on the back side (the lower surface side in
FIG. 1) of the woven fabric 1 are thermocompression-bonded and integrated by this
pressurization and heating. By thermosetting the thermosetting resin present in the inner portion
and the outer peripheral portion of each of the warp yarn 3 and the weft yarn 4, the warp yarn 3
and the weft yarn 4 themselves and the woven fabric 1 woven from them are in a cured state.
[0043]
For this reason, in the speaker in which the diaphragm 14 is mounted as shown in FIG. 1, the
hardness is high, and hence the vibration characteristic in the high range is excellent as shown
by the solid line characteristic in FIG.
[0044]
The broken line characteristics in FIG. 8 show the characteristics of the diaphragm 14 formed of
only a pulp paper plate. In this case, since the diaphragm 14 does not become hard, the vibration
characteristic of the high frequency range becomes low.
That is, the high frequency band can not be expanded.
[0045]
Further, in the speaker shown in FIG. 1 using the diaphragm 14 of the present embodiment, the
weave (5 in FIG. 4) in which the warp 3 and the weft 4 weave as described above is on the entire
surface side (upper surface side). Since it is exposed, it is difficult for local resonance action to
occur on the surface side of the diaphragm 14, and as a result, as an acoustic characteristic, a flat
characteristic can be obtained as shown in FIG.
[0046]
As described above, the present invention comprises a woven fabric in which a thermosetting
resin impregnated is in a thermosetting state, and a paper board integrated by
thermocompression bonding on the back side of the woven fabric, the woven fabric being woven
on the surface side It is a diaphragm for speakers that has an eye out, and it is high in strength
10-05-2019
8
because it uses a woven fabric, and because the thermosetting resin impregnated in this woven
fabric is in a thermosetting state, its hardness is high. Therefore, it is possible to provide a
speaker diaphragm that is excellent in vibration characteristics in a high range and a speaker
using the same.
[0047]
Therefore, it becomes very useful in various audio equipment.
[0048]
Cross-sectional view showing a speaker according to an embodiment of the present invention.
Main part enlarged cross-sectional view showing a speaker according to an embodiment of the
present invention. Main part enlarged cross-sectional view showing a diaphragm of a speaker
according to an embodiment A sectional view showing a method of manufacturing a diaphragm
of a speaker according to an embodiment of the present invention A sectional view showing a
method of manufacturing a diaphragm of a speaker according to an embodiment of the present
invention A cross-sectional view showing a method of manufacturing a diaphragm of a speaker
according to an embodiment A characteristic chart showing vibration characteristics of a speaker
according to an embodiment of the present invention
Explanation of sign
[0049]
DESCRIPTION OF SYMBOLS 1 woven fabric 2 paper board 5 texture 6 upper mold 7 lower mold
10 magnetic gap 11 magnetic circuit 12 conducting wire 13 voice coil 14 diaphragm 15 frame
16 first edge 17 leader 18 second edge 19 suspension holder 21 bonding Agent
10-05-2019
9
Документ
Категория
Без категории
Просмотров
0
Размер файла
18 Кб
Теги
jp2009021832
1/--страниц
Пожаловаться на содержимое документа