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JP2007221706

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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
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DESCRIPTION JP2007221706
To improve the sound quality of a screen speaker system by simple means without being
restricted by design. A screen 12 for projecting an image projected by a projector and a drive for
driving the screen 12 In a screen speaker system having a body and emitting sound from the
screen 12, a reinforcing member 30 for reinforcing the screen 12 was attached to the back of the
screen 12. [Selected figure] Figure 8
スクリーンスピーカシステム
[0001]
The present invention relates to a screen speaker system that emits sound from a screen that
projects an image projected from the outside.
[0002]
Conventionally, a direct drive screen that sends signals for center speakers to a voice coil
disposed at the center of the screen, sends signals for left and right channels to voice coils
disposed to the left and right thereof, and emits sound from the front of the screen There is a
speaker system.
As such a type of screen speaker system, for example, one disclosed in Patent Document 1 is
known.
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1
[0003]
JP 2005-64932 A (FIGS. 21 to 23)
[0004]
The diaphragm (screen) employed in the screen speaker system described in Patent Document 1
has a flat plate shape unlike a diaphragm having a general cone shape.
Therefore, standing waves are easily generated as compared with a diaphragm having a cone
shape. The occurrence of this standing wave adversely affects the sound quality of the screen
speaker system.
[0005]
In order to prevent the occurrence of such standing waves, in the screen speaker system
described in Patent Document 1, a support made of a cushion or the like is disposed between the
diaphragm and the housing.
[0006]
However, in order to mount the support according to the purpose, at least the diaphragm side
and the housing side must be provided with places for fixing or holding the support.
Therefore, it is necessary to design a housing etc. on the premise which arrange | positions a
support body, As a result, it will receive restrictions in designing a screen speaker system.
[0007]
The present invention has been made based on the above-mentioned circumstances, and an
object of the present invention is to provide a screen speaker system capable of improving sound
quality by simple means without being restricted by design. It is a thing.
[0008]
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2
In order to solve the above problems, the present invention is directed to a screen speaker
system including a screen for projecting an image projected by a projector and a driver for
driving the screen, wherein the screen speaker system emits sound from the screen. A
reinforcing member for reinforcing the screen is attached to the back surface.
[0009]
In addition to the above-described invention, in the other invention, the reinforcing member is
made of the same material as the screen.
[0010]
In addition to the above-mentioned invention, other inventions further comprise a reinforcement
member from metal.
[0011]
Furthermore, in another invention, in addition to the above-mentioned invention, the metal is
aluminum or an aluminum alloy.
[0012]
Furthermore, in the other invention, in addition to the above-mentioned invention, the cross
section of the reinforcing member has a V shape or a circular arc shape, and the V shape or the
circular arc both ends fix to the screen The pasting margin part which becomes a part for is
extended.
[0013]
Further, in addition to the above-mentioned invention, another invention makes the angle
between the two legs forming the V shape in the reinforcing member 90 degrees.
[0014]
Moreover, in addition to the above-mentioned invention, other invention made thickness of a
reinforcement member the range of 1/3 or more and 3/2 or less of the thickness of a screen.
[0015]
Furthermore, in addition to the above-described invention, in the invention, the height dimension
from the screen back surface of the reinforcing member in a state of being attached to the back
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3
surface of the screen is three to 15 times the thickness of the reinforcing member or screen. It is
the value of the range.
[0016]
Furthermore, in addition to the above-mentioned invention, in the invention of the above, the
width dimension of the bonding margin portion is in the range of 1/6 or more and 1 or less of
the length connecting V-shaped or arc-shaped both open end inner side. It is a value.
[0017]
Moreover, in addition to the above-mentioned invention, in the other invention, the
reinforcement member is attached to the back surface of the screen using a two-component
mixed acrylic adhesive.
[0018]
According to the present invention, it is possible to improve the sound quality of the screen
speaker system by simple means without being subject to design restrictions.
[0019]
Hereinafter, a screen speaker system according to an embodiment of the present invention will
be described with reference to the drawings.
[0020]
FIG. 1 is a perspective view showing the screen speaker 11, and FIG. 2 is a perspective view
showing the configuration of the support 20.
FIG. 3 is a perspective view showing an outer peripheral frame 21 constituting a support 20 used
for the screen speaker 11.
FIG. 4 is a view showing the corner portion P of the outer peripheral frame 21 used for the
screen speaker 11. FIG. 4A is an assembly view showing a configuration for fixing the two
housings 21L and 21S by the L metal fitting 23. B) is a fragmentary sectional view which shows
the structure which fixed two housings 21L and 21S by L metal fitting 23. FIG.
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In the following description, in FIG. 1 to FIG. 3 and FIG. 5 to FIG. 8, the left side indicates the
direction of arrow X1 and the right side indicates the direction of arrow X2.
Further, the upper side indicates the direction of arrow Y1, and the lower side indicates the
direction of arrow Y2.
Further, in the present embodiment, as an example of a driving body for driving the screen 12, a
driving body (not shown) having a magnetic circuit (not shown) and a voice coil (not shown) is
adopted. Further, as the housing, a magnetic circuit housing H for holding a magnetic circuit (not
shown) is employed.
In addition, as a drive body, other members, such as a piezoelectric element, may be employ |
adopted, and a voice coil, a piezoelectric element, etc. may be used together.
[0021]
The screen speaker 11 is a direct drive type screen speaker which constitutes a part of the screen
speaker system, and as shown in FIG. 1, the screen 12 mounted on the front side and projecting
an image from the outside, and the back of the screen 12 It is mainly comprised from the
housing | casing 14 arrange | positioned and hold | maintaining this screen 12, and the drive
body (not shown) which vibrates the screen 12. As shown in FIG.
In addition, the housing 14 mainly includes a support 20 and a back plate (not shown) mounted
on the back side of the support 20.
[0022]
The external dimensions of the screen speaker 11 are 1680 mm in width (length in the
horizontal direction), 895 mm in height (length in the vertical direction), and 36 mm in thickness
(including the thickness of the back plate (not shown)).
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5
In this embodiment, a so-called 75-inch screen size configured to have an aspect ratio of 9:16 is
shown as an example.
The thickness of the screen 12 is 0.8 mm.
The thickness of the screen 12 is not limited to 0.8 mm.
[0023]
In FIG. 2, the front side of the paper surface is the back side of the screen speaker 11, and the
back side of the paper surface is the front side of the screen speaker 11.
The support 20 has a frame structure, and includes an outer peripheral frame 21, an inner frame
22, and a holder 24.
The outer peripheral frame 21 has a rectangular shape, and the outer dimension is 1680 mm in
the lateral direction and 895 mm in the vertical direction according to the external dimensions of
the screen speaker 11.
[0024]
The outer peripheral frame 21 is disposed in the left-right direction, and includes two housings
21L that form upper and lower frames of the outer peripheral frame 21, and two housings 21S
that are disposed in the vertical direction and that configure the left and right frames. There is.
The outer peripheral frame 21 has a structure in which the housing 21S and the housing 21L are
fixed to each other via the L metal fitting 23 at the four corners of the frame.
[0025]
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6
Specifically, the ends of the housings 21L and 21S are joined so that the housings 21L and 21S
are perpendicular to each other when the ends are aligned with each other. As shown in FIG. 4,
the end portions of the casings 21L and 21S are formed obliquely at 45 degrees from the side of
the bottom plate portions 21Lb and 21Sb to the side of the opening so that the outer frame 21
has a rectangular shape. . The casing 21L and the casing 21S are joined at right angles by
aligning the end portions formed at an angle of 45 degrees, to the corner P where the casing 21L
and the casing 21S are joined from the inner side of the casing 21L, 21S. The L metal fitting 23 is
disposed, and the housing 21L and the housing 21S are fixed to each other by the L metal fitting
23. The L metal fitting 23 and the housings 21L and 21S are fixed by a screw S.
[0026]
The housings 21L and 21S are made of aluminum, and the cross-sectional shape thereof is
substantially U-shaped as shown in FIG. That is, the casing 21L is a grooved member having the
bottom plate portion 21Lb and the side plate portions 21Ls on both sides of the bottom plate
portion 21Lb and opening the side facing the bottom plate portion 21Lb. The casing 21S is also a
grooved member having a bottom plate portion 21Sb and side plate portions 21Ss on both sides
of the bottom plate portion 21Sb, and opening the side facing the bottom plate portion 21Sb. The
housings 21L and 21S have the bottom plates 21Lb and 21Sb disposed on the outer peripheral
side, and are disposed with the side of the opening facing the inside of the frame. The housings
21L and 21S have a width Wb of 30 mm on the outside of the bottom plates 21Lb and 21Sb, and
a width Ws of 25 mm on the outside of the side plates 21Ls and 21Ss. Moreover, the thickness of
the board which comprises bottom plate part 21Lb, 21Sb and side plate part 21Ls, 21Ss is 3 mm.
Since the thickness of the screen 12 is 0.8 mm, the thickness of the bottom plate portions 21Lb
and 21Sb and the side plate portions 21Ls and 21Ss is formed 3.75 times the thickness of the
screen 12. The casings 21L and 21S are formed by extrusion molding. The casings 21L and 21S
constituting the outer peripheral frame 21 are substantially U-shaped in cross section, and the
plate thickness is at least 3 times and at most 10 times the thickness of the screen 12 (3.75 times
in the present embodiment) By doing this, the strength of the support 20 can be secured without
affecting the sound quality.
[0027]
Further, in the housings 21L and 21S, two screw insertion holes 21Lh and 21Sh for passing the
screws S are formed respectively. A hole 21Lh 'is formed between the two screw insertion holes
21Lh. Further, a hole 21Sh 'is formed between the two screw insertion holes 21Sh.
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[0028]
On the other hand, two screw insertion holes 23h are formed in one side portion 23A of the L
metal fitting 23 so that the screw S can be inserted without being screwed. A hole 23h 'is formed
between the two screw insertion holes 23h. Further, in the other side 23B of the L metal fitting
23, two screw holes 23hm in which the screw S is screwed are formed. Further, a hole 23 h ′ is
formed between the two screw holes 23 hm.
[0029]
The two screw insertion holes 23h on one side 23A of the L metal fitting 23 and the holes 23h
'therebetween, and the two screw holes 23hm on the other side 23B and the holes 23h'
therebetween are respectively as follows: Is formed. That is, with the L metal fitting 23 facing the
outside of the L-shape toward the side of the right angle where the housing 21L and the housing
21S intersect, the side 23A along the housing 21L and the side 23B along the housing 21S, the
housing The screw insertion hole 23h is located at a position facing the screw insertion hole
21Lh on the 21L side, and the hole 23h 'is formed at a position facing the hole 21Lh'. Further,
the screw hole 23hm is located at a position facing the screw insertion hole 21Sh on the side of
the rod 21S, and the hole 23h 'is located at a position facing the hole 21Sh'.
[0030]
The housing 21S and the L metal fitting 23 are fixed to each other by screwing the screw S into
the screw hole 23hm. Further, the housing 21L and the L metal fitting 23 are fixed to each other
by screwing a nut N on the tip end side of the screw S passed through the screw insertion hole
21Lh and the screw insertion hole 23h.
[0031]
As described above, the outer peripheral frame 21 is configured as a frame by fixing the housing
21L and the housing 21S to each other by the L metal fitting 23 (see FIG. 4B).
[0032]
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8
FIG. 5 is a perspective view showing an outer peripheral frame 21 and an inner frame 22 which
constitute a support 20 used for the screen speaker 11.
[0033]
As shown in FIG. 5, in the outer frame 21, the inner frame 22 is stretched over the upper and
lower casings 21 L at positions equally divided into three in the left-right direction, and the
casing 21 L and the inner frame 22 mutually It is fixed.
The inner frame 22 is composed of two housings 22A.
The housing 22A is manufactured by extruding an aluminum material, and has a substantially Ushaped cross section.
[0034]
The inner frame 22 is fixed to the housing 21 L via the L metal fitting 23. Specifically, as shown
in FIG. 5, the L metal fittings 23 are disposed on the left and right sides of the inner frame 22.
Then, the screw S is inserted into the screw insertion hole 21Lk formed in the housing 21L from
the side of the housing 21L, and the nut N is screwed into the inserted screw S. Thereby, the L
metal fitting 23 is fixed to the housing 21L. Furthermore, the screw Sr1 is inserted into the screw
insertion hole 23r of the L metal fitting 23 disposed on the left side of the inner frame 22 and
the screw insertion hole 22s formed in the inner frame 22. Then, the screw Sr1 is screwed into
the screw hole 23t of the L metal fitting 23 disposed on the right side of the inner frame 22.
Thereby, the L metal fitting 23 is fixed to the left and right sides of the inner frame 22. As a
result, the inner frame 22 is fixed to the housing 21L via the L metal fitting 23.
[0035]
Thus, the outer frame 21 is reinforced by bridging and fixing the inner frame 22 to the case 21L
of the outer frame 21, and the rigidity is enhanced. The screen speaker 11 also functions as a
partition for a cavity that constitutes each of the center, left, and right output channels. That is,
the sitter channel, the left channel, and the right channel can each constitute an independent
11-05-2019
9
cavity. In the inner frame 22 which is a partition constituting a cavity, two housings 22A are
stacked back to back. For this reason, the inner frame 22 is a double partition. Thus, the mixing
of sound between the cavities can be reduced.
[0036]
FIG. 6 is a perspective view showing a state in which the magnetic circuit housing H is held at the
center of the holding frame 24. As shown in FIG.
[0037]
As shown in FIG. 6, the magnetic circuit housing H has a rectangular parallelepiped shape that is
substantially square in a plan view.
Further, as shown in FIG. 6, the holding frame 24 includes two casings 25 juxtaposed in the leftright direction and a total of four juxtaposed two juxtaposed vertically on both sides of the two
casings 25. It is configured by combining a book housing 26 in a well-gage shape.
[0038]
The housing 25 has a flat plate portion 25A and a vertical plate portion 25B provided at right
angles along the center of the flat plate portion 25A. That is, the cross section of the housing 25
is configured to be substantially T-shaped. The housings 25 are respectively provided on the left
and right of the magnetic circuit housing H.
[0039]
The left and right side surfaces of the magnetic circuit housing H are provided with screw holes
(not shown) in which screws S are screwed at two places. Further, in the vertical plate portions
25B of the casing 25 disposed on the left and right of the magnetic circuit housing H, screws for
inserting the screws S at positions corresponding to screw holes (not shown) formed in the
magnetic circuit housing H An insertion hole (not shown) is formed. Then, the housing 25 can be
fixed to the magnetic circuit housing H by screwing the screw S into the screw insertion hole (not
shown) and screwing it into the screw hole (not shown) of the magnetic circuit housing H. Since
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10
the left and right side surfaces of the magnetic circuit housing H and the vertical plate portion
25B are planar to each other, the magnetic circuit housing H is fixed with the left and right side
surfaces in close contact with the vertical plate portion 25B.
[0040]
The housing 25 is manufactured by extrusion molding made of an aluminum material. The width
of the flat plate portion 25A is 23 mm, and the width of the vertical plate portion 25B is 25 mm.
The thickness of each of the housings 21L and 21S is 3 mm. That is, the width of the flat plate
portion 25A is about 7.6 times the thickness of the housings 21L and 21S, and the width of the
vertical plate portion 25B is about 8.3 times the thickness of the housings 21L and 21S It has
become. Furthermore, the thickness of the flat plate portion 25A and the vertical plate portion
25B is 3 mm, which is the same as that of the housings 21L and 21S. Further, the length of the
flat plate portion 25A is 88.8 mm so as to be bridged over the upper and lower housings 21L.
The thickness of the flat plate portion 25A and the flat plate portion 25B is equal to or more than
4 times the plate thickness of the casings 21L and 21S constituting the outer peripheral frame
21 (the same in the present embodiment). The width 25B is not less than 5 times and not more
than 20 times the plate thickness of the casings 21L and 21S (about 7.6 times for the flat plate
portion 25A and about 8.3 times for the flat plate portion 25B in this embodiment) By doing this,
the weight of the screen speaker 11 can be reduced, and the rigidity of the support 20 can be
secured.
[0041]
As described above, two casings 26 are provided on the upper and lower sides of the two casings
25 that hold the magnetic circuit housing H inside. Similarly to the casing 25, the casing 26 is
also substantially T-shaped in cross section, and includes a flat plate portion 26A and a vertical
plate portion 26B provided at right angles along the center of the flat plate portion 26A. Further,
as shown in FIG. 6, each housing 26 is fixed to the housing 25 and the magnetic circuit housing
H by a total of eight L fittings 27 disposed so as to sandwich the vertical plate portion 25B of the
housing 25.
[0042]
As described above, the magnetic circuit housing H is held by the case 25 and the case 26 at the
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11
central portion of the holding frame 24 assembled in the shape of a parallel cross. As described
above, by fixing the left and right surfaces of the magnetic circuit housing H in close contact with
the vertical plate portion 25B of the housing 25, the holding of the magnetic circuit housing H
with respect to the holding frame 24 becomes reliable. Therefore, abnormal vibration can be
prevented and sound quality can be improved. Further, it is possible to improve the heat
radiation effect of dissipating the heat from the magnetic circuit to the housing 25 side at the
time of large input.
[0043]
The holding frame 24 for holding the magnetic circuit housing H is disposed in each of the three
cavities divided by the inner frame 22 as shown in FIG. 2 and fixed to the support 20 by the L
metal fitting 23. That is, the housing 25 of each holding frame 24 is fixed to the upper and lower
housings 21 L by the L metal fitting 23 using a screw. Specifically, one of the left and right
housings 26 constituting the holding frames 24 disposed in the left and right cavities is a
housing 21 S, the other housing 26 is an inner frame 22, and the L metal fitting 23 is By means
of a screw. Further, the casing 26 constituting the holding frame 24 disposed in the central
cavity is fixed to the inner frame 22 by the L fitting 23 using a screw.
[0044]
In a state where the magnetic circuit housing H and the holding frame 24 are disposed in each
cavity, as shown in FIG. 2, the inside of each cavity is an upper left region 28a formed in the
upper left stage, and a middle upper region formed in the center upper stage 28b, upper right
region 28c formed in upper right stage, left middle region 28d formed in left middle step, right
middle region 28e formed in right middle step, lower left region 28f formed in lower left step,
formed in lower center It is mainly divided into eight regions, a middle lower region 28g and a
lower right region 28h formed in the lower right.
[0045]
FIG. 7 is a perspective view showing a state before the reinforcing member 30 is attached to the
screen 12.
FIG. 8 is a perspective view showing a state where the screen 12 on which the reinforcing
member 30 is mounted is mounted on the support 20. As shown in FIG.
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12
[0046]
As shown in FIG. 7, a total of 102 reinforcing members 30 are mounted on the back surface of
the screen 12 in a state of being arranged in a fixed array.
[0047]
When the screen 12 to which the reinforcing member 30 is attached is attached to the support
20, as shown in FIG. 8, the upper left area 28a, the upper right area 28c, the lower left area 28f
and the lower right area 28h are Each reinforcement member 30 will be arrange | positioned.
In addition, four reinforcing members 30 are arranged in each of the upper middle region 28b
and the middle lower region 28g. Furthermore, one reinforcing member 30 is disposed in each of
the left middle region 28d and the right middle region 28e.
[0048]
Specifically, in each of the upper left region 28a, the upper right region 28c, the lower left region
28f, and the lower right region 28h, three reinforcing members 30 extending in the vertical
direction of each row are arranged in two rows in the vertical direction. Is attached. Among these,
the two reinforcing members 30 mounted on the upper side are arranged to form a substantially
V shape, and the two reinforcing members 30 mounted on the lower side are in the vertical
direction of each other. Are arranged in parallel to the Further, the two reinforcing members 30
mounted below are arranged in a substantially C shape. In each of the upper and lower regions
28b and 28g, two reinforcing members 30 are attached at the top and the bottom, and two of the
two reinforcing members 30 attached at the top are substantially V-shaped. The two reinforcing
members 30 mounted below are arranged so as to be substantially in a V shape. In each of the
left middle region 28d and the right middle region 28e, one reinforcing member 30 is disposed
along the left-right direction.
[0049]
Next, the configuration of the reinforcing member 30 will be described. FIG. 9 is a view showing
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the configuration of the reinforcing member 30, (A) is a perspective view thereof, (B) is a side
view seen from the direction of arrow A in (A), (C) Is a front view seen in the direction of arrow B
in (B).
[0050]
As shown in FIGS. 9A to 9C, the reinforcing member 30 extends in the longitudinal direction a
flat plate having a substantially rectangular shape of 80 mm in the longitudinal direction, 30.4
mm in the transverse direction, and 0.5 mm in thickness. Along the center line X toward which
the two legs 30a and 30b are 90 degrees, and the left end of the leg 30a and the right end of the
leg 30b are longitudinally Parallel to each other and formed so as to have a folding width of 5.2
mm. The left end of the leg 30a and the right end of the leg 30b are bent so that the angle β
with respect to each of the leg 30a and the leg 30b is 135 degrees. And this bent part forms
pasting margin parts 31a and 31b. In addition, the dimension of the vertical direction and
horizontal direction of the said flat plate is not limited to said value. Furthermore, the bonding
margin portions 31a and 31b are portions for fixing to the back surface of the screen 12 with an
adhesive or the like. The dimension of the height Y from the screen 12 of the reinforcing member
30 in the state where the reinforcing member 30 is attached to the screen 12 is about 7.5 mm.
Further, the dimension of the width Z connecting the V-shaped opening end in the reinforcing
member 30 is about 14.2 mm. Since the reinforcing member 30 has the above-described simple
shape, it can be formed by pressing or a mold having a simple shape.
[0051]
Further, the reinforcing member 30 is made of aluminum which is the same material as the
screen 12. This is because the reinforcing member 30 is formed of a material having the same
coefficient of thermal expansion as the screen 12, so that the vicinity of the mounting portion
between the screen 12 and the reinforcing member 30 is deformed by thermal expansion due to
heat generation of the voice coil To prevent The material of the reinforcing member 30 is not
limited to aluminum, and may be another metal such as aluminum alloy, stainless steel or copper
as long as the thermal expansion coefficient is not significantly different from aluminum.
Mounting of the reinforcing member 30 on the screen 12 is performed by interposing a twocomponent mixing type acrylic adhesive using two components of a main agent and a curing
agent between the screen 12 and the bonding portions 31a and 31b, and bonding them both It is
done by
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[0052]
Next, a method of adhering the reinforcing member 30 to the screen 12 with a two-component
mixed acrylic adhesive will be described.
[0053]
First, in the back surface of the screen 12, among the portions to which the reinforcing member
30 is attached, the positions where the bonding margin portions 31 a and 31 b are adhered are
marked.
Then, the main agent of the two-component mixed acrylic adhesive is applied to the marked
portion, and the coated portion is made uniform using a spatula or a brush.
[0054]
Next, the curing agent of the two-component mixed acrylic adhesive is applied to the bonding
margin portions 31a and 31b, and the coated portion is brought into a uniform state using a
spatula or a brush. And sticking margin part 31a, 31b by which the hardening agent was apply |
coated on the back part of the screen 12 to which the main agent was apply | coated is overlap |
superposed, and it measures. In order to ensure the stability of adhesion at the time of this
pressure setting, the so-called aligning operation of aligning the reinforcing member 30 with the
screen 12 is performed. The aligning operation is performed by moving the reinforcing member
30 from the mounting position in, for example, about 2 mm to 3 mm in any of the front, rear,
left, and right directions.
[0055]
After the aligning operation, the reinforcing member 30 is bonded to the mounting position with
a certain degree of adhesive force due to the initial tackiness of the adhesive. However, in order
to further improve the adhesive force, a predetermined load is applied to the bonding margin
portions 31a and 31b. For example, it is performed by placing a weight having a predetermined
weight on the reinforcing member 30 for a predetermined time (for example, an adhesive curing
time). The adhesive composition used herein contains a polymerizable component consisting of a
derivative of acrylic acid or methacrylic acid, and one composition contains an oxidizing
11-05-2019
15
composition, for example, an organic peroxide, The other component includes, but is not limited
to, a room temperature curable acrylic adhesive composition comprising a reducing composition
which induces redox polymerization. Through the above process, the reinforcing member 30 is
mounted on the back surface of the screen 12 with a strong adhesive force.
[0056]
In the screen speaker system configured as described above, by mounting the reinforcing
member 30 on the back surface of the screen 12, it is possible to reduce the number of vibration
modes of the standing wave generated on the screen 12. Further, in consideration of the
mounting form of the reinforcing member 30, it is possible to reduce the inherent vibration
mode of the screen 12 particularly in the high sound band. For this reason, it is possible to
prevent the occurrence of resonance in the high sound band in the screen 12. Further, by
mounting the reinforcing member 30 on the screen 12, the weight of the entire screen is slightly
increased, so that the standing wave in the basic mode of the screen 12 can be made to have a
low frequency. Therefore, it is possible to suppress the occurrence of resonance that adversely
affects the sound quality in the screen 12, and as a result, the sound quality emitted from the
screen speaker 11 can be significantly improved.
[0057]
Further, in the screen speaker system, the reinforcing member 30 is made of aluminum which is
the same material as the screen 12. Therefore, when the screen 12 expands due to heat
generated from a voice coil (not shown) or the like, it is possible to prevent the tension from
acting between the screen 12 and the reinforcing member 30, and both deform each other. You
can prevent Further, since the reinforcing member 30 is formed of aluminum which is a light
metal, the reinforcing member 30 is lightweight and has high strength. As a result, the
reinforcing member 30 can withstand the vibration of the screen 12 even in the case of a large
input.
[0058]
Further, in the screen speaker system, since the reinforcing member 30 is formed of aluminum,
its thermal conductivity is extremely high. Furthermore, by mounting the reinforcing member 30
on the screen 12, the contact area with the space in the cavity is increased. Therefore, the heat
11-05-2019
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dissipation of the screen 12 is improved, and as a result, the durability of the screen 12 is
improved.
[0059]
Further, in the screen speaker system, the cross-sectional shape of the reinforcing member 30 is
V-shaped, and the bonding margin portions 31a and 31b are provided at both ends. Thus, since
the reinforcing member 30 has a simple shape, it can be easily manufactured by, for example, a
machine such as a shear or a bender, and can also be manufactured by a simple mold. Therefore,
it is possible to mass-produce the reinforcing member 30, and the cost can be reduced. Further,
since the angle between the leg 30a and the leg 30b in the reinforcing member 30 is 90 degrees,
it is possible to obtain a pre-processed material, and the mass productivity is further enhanced.
[0060]
Further, in the screen speaker system, when the reinforcing member 30 is attached to the screen
12, through holes along the longitudinal direction of the reinforcing member 30 are formed
between the legs 30 a and 30 b of the reinforcing member 30 and the screen 12. It is done.
Therefore, when the screen 12 and the reinforcing member 30 are overheated, the overheated
air flows out of the opening of the through hole. Therefore, the heated air does not accumulate in
the space between the reinforcing member 30 and the screen 12, and the screen speaker 11 has
high heat dissipation.
[0061]
Further, in the screen speaker system, the thickness of the reinforcing member 30 is about 0.63
times the thickness of the screen 12, and the dimension of the height Y from the screen 12 of the
reinforcing member 30 is the thickness of the screen 12 It is about 9.4 times. In consideration of
these, the reinforcing member 30 is lightweight and has high strength. Therefore, the reinforcing
member 30 has sufficient durability to follow the vibration of the screen 12.
[0062]
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17
In the screen speaker system, the width of the bonding margin portions 31 a and 31 b of the
reinforcing member 30 is about 0.37 times the dimension of the width Z of the reinforcing
member 30. Therefore, the width of the bonding margin portions 31 a and 31 b is sufficiently
secured to the reinforcing member 30. Therefore, the reinforcing member 30 can be firmly fixed
to the screen 12. As a result, even if the screen 12 is vibrated with a large input and for a long
time, the reinforcing member 30 can withstand the vibration, and the reliability of the screen
speaker 11 is improved.
[0063]
Further, in the screen speaker system, the reinforcing member 30 is attached to the screen 12
using a two-component acrylic adhesive of a two-component mixture of a main agent and a
curing agent. Therefore, the reinforcing member 30 can be fixed to the screen 12 with extremely
high adhesive force. Therefore, even if the screen 12 is vibrated for a long time with a large
input, the reinforcing member 30 does not peel off the screen 12. As a result, with the
improvement of the quality and sound quality of the screen speaker 11, high reliability can be
obtained. Further, by attaching the reinforcing member 30, it is possible to reduce the inherent
vibration mode of the screen 12 particularly in the high tone range, so that the sound quality in
the high tone range can be improved. Moreover, since the process of bonding the reinforcing
member 30 to the screen 12 is simple, the workability can be improved.
[0064]
As mentioned above, although one embodiment of the present invention was described, the
present invention is not limited to the above-mentioned form, and can be carried out in variously
modified forms.
[0065]
In the above embodiment, the angle α between the leg 30a and the leg 30b in the reinforcing
member 30 is set to 90 degrees, but is not limited to this. It may be an angle.
Moreover, although the reinforcement member 30 is comprised from leg part 30a, 30b which
has V-shaped cross section, and sticking margin part 31a, 31b, it is not limited to this structure,
For example, leg part 30a , 30b, as shown in FIGS. 10A to 10C, may be an arc 30c having an arc
shape in cross section.
11-05-2019
18
[0066]
Further, in the above-described embodiment, the thickness of the reinforcing member 30 is set to
0.5 mm, but is not limited to this, and may be 1/3 or more and 3/2 or less of the thickness of the
screen 12 It is good also as a range.
[0067]
Further, in the above embodiment, the dimension of the height Y from the screen 12 of the
reinforcing member 30 is about 7.5 mm, but the thickness Y of the screen 12 is not limited to
this value. The value may be in the range of 3 times to 15 times.
Further, the dimension of the width Z connecting the V-shaped open ends in the reinforcing
member 30 is about 14.2 mm, but is not limited to this value, and may be another value.
Furthermore, although the dimension of the width of the bonding margin portions 31a and 31b
is set to 5.2 mm, without being limited to these values, the dimension of the width Z connecting
the V-shaped open end in the reinforcing member 30, or The value may be in the range of 1 to
1/6 of the dimension of the width W connecting the arc-shaped open ends shown in FIG.
[0068]
Moreover, in the above-mentioned embodiment, although fixation to the screen 12 of the
reinforcement member 30 is performed using the acrylic adhesive of two-component mixing type
by two components of a main ingredient and a hardening agent, it is limited to this Instead, an
adhesive made of one kind of solvent may be used.
[0069]
In the above embodiment, as shown in FIG. 7, the 102 reinforcing members 30 are attached to
the screen 12 in a predetermined arrangement, but the arrangement of the reinforcing members
30 is not limited to this. Alternatively, the number of reinforcing members 30 to be mounted may
be different.
[0070]
11-05-2019
19
Moreover, in the above-mentioned embodiment, although three cavities are provided in the
inside of the housing | casing 14, it is not limited to this, It is good also as two or less or four or
more.
Further, the holding body 24 may be configured to have another shape instead of being formed
in the shape of parallel crosses.
[0071]
The screen speaker system of the present invention can be used in an acoustic conversion device
such as a speaker that emits sound from the entire surface of the screen.
[0072]
It is a perspective view showing a screen speaker concerning a 1 embodiment of the present
invention.
It is a perspective view which shows the structure of the support body used for the screen
speaker of FIG.
It is a perspective view which shows the outer peripheral frame which comprises the support
body used for the screen speaker of FIG. It is a figure which shows the corner | angular part of
the outer periphery frame used for the screen speaker of FIG. 1, (A) is an assembly drawing
which shows the structure which fixes two housings by L metal fitting, (B) is two housings. It is
sectional drawing in the site | part A of FIG. 3 which shows the structure fixed by L metal fitting.
It is a perspective view which shows the outer periphery frame and inner frame which comprise
the support body used for the screen speaker of FIG. It is a figure which shows the structure of
the support body used for the screen speaker of FIG. 1, and is a perspective view which shows
the structure of a holding frame. It is a perspective view which shows the state before mounting a
reinforcement member to a screen. It is a perspective view which shows the state which mounted
| wore the support body with the screen in which the reinforcement member was mounted |
worn. It is a figure which shows the structure of a reinforcement member, (A) is the perspective
view, (B) is the side view seen from the arrow A direction in (A), (C) is (B) The front view seen
from the direction of arrow B in FIG. It is a figure which shows the modification of a
reinforcement member, (A) is the perspective view, (B) is the side view seen from the arrow C
direction in (A), (C) is (B) In the direction of arrow D).
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20
Explanation of sign
[0073]
12: Screen 30: Reinforcement member
11-05-2019
21
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