JP2016015702

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DESCRIPTION JP2016015702
An object of the present invention is to provide a speaker system of good sound quality, which is
not complicated in configuration and less in restriction for installation. A speaker system for
transmitting a vibration from a driver for converting an audio electric signal to a mechanical
vibration to generate vibration to a diaphragm and generating a sound by the vibration of the
diaphragm, the diaphragm being a surface It has a curved first curved surface portion and a
second curved surface portion in which the bending direction continued to the first curved
surface portion is opposite to the first curved surface portion. [Selected figure] Figure 1
Speaker system, diaphragm and vibrator
[0001]
The present invention relates to a speaker system which transmits vibration obtained by
converting an audio electrical signal into mechanical vibration to a diaphragm and generates
sound by the vibration of the diaphragm.
[0002]
There are the following techniques for generating sound by vibration of the diaphragm.
Patent Document 1 describes a technique in which a flat plate is provided at the peripheral
portion of the curved plate and the driving means is connected to the flat plate. Patent Document
2 describes a technology in which a rib is provided on the back surface of a curved plate and a
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voice coil is provided on the back surface to make it thin. Patent Document 3 describes a
technique of elastically deforming a paper, which is a diaphragm, in a state of internal stress, and
supporting the paper at two points by a rod-like support member and a narrowing plate.
[0003]
Patent No. 2510607 Japanese Patent Application Laid-Open No. 11-275688 Japanese Patent
Application Laid-Open No. 2000-350285
[0004]
However, the technology described in the above-mentioned conventional document 1 or
document 2 is mechanically complicated, and the technology described in document 3 has a
problem that the installation place and the installation state are restricted.
An object of the present invention is to provide a speaker system with a good sound quality
which is not complicated in configuration and less restricted in installation.
[0005]
The speaker system according to the present invention is a speaker system for transmitting a
vibration from a driver for converting an audio electrical signal to a mechanical vibration to
generate a vibration to a diaphragm and generating a sound by the vibration of the diaphragm,
the vibration being The plate is planar, and has a curved first curved surface portion and a
second curved surface portion in which the bending direction continued to the first curved
surface portion is in the opposite direction to the first curved surface portion. It is characterized
by Further, the speaker system of the present invention is characterized in that the vibration
from the driver is transmitted to the second curved surface portion. In the speaker system of the
present invention, the length of the first curved surface portion is longer than the length of the
second curved surface portion. In the speaker system of the present invention, the vibration from
the driver has a plurality of channels, and the vibration of each channel of the plurality of
channels is transmitted to the diaphragm, and the vibration in which the vibration of each
channel is mixed is transmitted to the diaphragm It is characterized by
[0006]
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Further, the speaker system according to the present invention has a box-like vibrating body
containing the driver, and the vibrating plate is combined with the vibrating body to support the
vibrating plate on the vibrating body, and from the driver Is transmitted to the diaphragm via the
vibrator. Further, the speaker system according to the present invention has a box-like vibrating
body containing the driver, and the vibrating plate is combined with the vibrating body to
support the vibrating plate on the vibrating body, and from the driver Is transmitted to the
diaphragm via a transmission member that transmits the vibration of the vibrator to the outside
of the vibrator. In the speaker system according to the present invention, the vibrator and the
diaphragm are provided with a plurality of pairs of suction members mutually attracted by a
magnetic force, and the vibrator and the diaphragm are coupled via the suction members. The
vibration is transmitted to the diaphragm via the suction member. Further, the speaker system of
the present invention is a speaker system for transmitting a vibration from a driver for
converting an audio electrical signal to a mechanical vibration to generate a vibration to a
diaphragm and generating a sound by the vibration of the diaphragm, The diaphragm is provided
on a planar diaphragm having a curved portion, a box-shaped vibrator including a driver, the
vibrator and the vibrator, and the vibrator is combined with the vibrator to support the vibrator.
And a plurality of a pair of suction members for transmitting the vibration from the driver to the
diaphragm. The diaphragm of the present invention is characterized in that it is a diaphragm
used in each of the above speaker systems. Further, the vibrating body of the present invention is
characterized in that it is a vibrating body used in each of the above speaker systems.
[0007]
The present invention is a planar diaphragm of a speaker system which transmits a vibration
from a driver for converting a sound electric signal to a mechanical vibration to generate a
vibration to a diaphragm and generates a sound by the vibration of the diaphragm. And the
second curved surface portion in which the bending direction continued to the first curved
surface portion has a direction opposite to the first curved surface portion, so that the sound
quality is good. It has an effect that it is mechanically simple in structure and has a high degree
of freedom in installation.
[0008]
FIG. 1 is a front perspective view of a speaker system according to an embodiment of the present
invention.
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FIG. 2 is a rear perspective view of the speaker system according to the embodiment of the
present invention. FIG. 3 is a back view of the vibrating plate 2. FIG. 4 is a side view of the
vibrating plate 2. FIG. 5 is a cross-sectional view taken along the line A-A of FIG. FIG. 6 is a front
view of the vibration box 3. FIG. 7 is a cross-sectional view taken along line AA of FIG. FIG. 8 is a
view showing the attached driver 4.
[0009]
Embodiments of the present invention will be described.
[0010]
FIGS. 1 and 2 are perspective views of a speaker system 1 according to an embodiment of the
present invention. The speaker system 1 includes a vibration plate 2 and a vibration box 3.
The vibrating plate 2 is a plate-like one using wood as a material, a curved curved surface portion
21 is formed at the upper portion, and is continuous with the curved surface portion 21 at the
lower portion, and the bending direction is reverse to the curved surface portion 21 The curved
surface portion 22 is formed.
[0011]
The vibration box 3 has a substantially triangular shape in the end face 34 and is in the form of a
horizontally long box having a front side surface 31, a rear side surface 32, and a bottom surface
33. The driver 4 (see FIG. 7 and FIG. 8), which is a vibration type speaker, is attached to convert
it to generate a vibration. The vibration box 3 uses wood as a material like the vibration plate 2.
[0012]
The vibrating plate 2 has the surface where the curved surface of the curved portion 21 is
recessed is the front surface, and the bulging surface is the rear surface. The front side surface
31 and the rear side surface 32 of the vibration box 3 are formed on the concave surface of the
curved surface portion 22 of the vibration plate 2, that is, a curved surface along the curved
surface of the back surface. The reverse side is combined with the hold medals 51 and 52 by the
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catchers 81 and 82. Thereby, as shown in FIG. 1 and FIG. 2, the vibrating plate 2 is vertically
supported by the vibrating box 3.
[0013]
FIGS. 3 to 5 show details of the vibrating plate 2. FIG. 3 is a back view, FIG. 4 is a side view, and
FIG. 5 is an AA sectional view.
[0014]
As shown in FIG. 4, the curved surface portion 21 of the vibrating plate 2 is formed into a curved
surface that is curved like a suspension curve by bending a plate-like member, and the curved
surface portion 22 is in the reverse direction continuous with the end of the curved surface
portion It is formed in a curved curved surface.
The degree of curvature of the curved surface is more gradual in the curved surface portion 21
than in the curved surface portion 22, and the length of the curved surface is longer in the
curved surface portion 21 than in the curved surface portion 22. The curvature of the curved
surface portion 21 is limited to a hanging curve, and may be a sine curve or an arc.
[0015]
As shown in FIG. 3, on the back side of the curved surface portion 22 of the vibrating plate 2, left
and right hold medals 51 and a central hold medal 52 for coupling the vibrating plate 2 to the
vibrating box 3 are attached. The hold medals 51 and 52 are disc-like ones made of magnetic
material as shown in FIG. 5 and are firmly adhered to the vibrating plate 2. The hold medals 51
and 52 are fixed to the catchers 81 and 82 (see FIG. 6) of the vibration box 3 described later by
the magnetic force.
[0016]
The vibrating plate 2 uses a spruce as the type of wood in this embodiment, and its size is
approximately 400 mm in height. It is about 300 mm wide and 3 mm thick. Also, the surface of
the vibration plate 2 is painted in the same manner as painting of an instrument such as a guitar.
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In addition, as a material of the vibration plate 2, wood, metal, porcelain, glass, ceramics, etc. of
another kind can also be used, and these can be replaced and used.
[0017]
6 to 8 show the vibration box 3.
[0018]
FIG. 6 is a front view of the vibration box 3 and shows the front side surface 31. As shown in FIG.
On the front side surface 31, catches 81 and 82 for attaching and holding the hold medals 51
and 52 of the vibrating plate 2 are attached. The catchers 81 are located on the left and right of
the front side 31, and the catchers 82 are located slightly below the center.
[0019]
FIG. 7 is a cross-sectional view of the vibration box 3 taken along the line A-A of FIG. As shown in
FIG. 7, the vibration box 3 is divided into two, and is constituted by two front and rear units of a
front unit 35 having a front side 31 and a rear unit 36 having a rear side 32. The front unit 35
and the rear unit 36 are integrated by bonding the bonding surfaces 351 and 361, which are
inner surfaces, after the respective members are arranged.
[0020]
First, the front unit 35 will be described. As shown in FIG. 7, the bonding surface 351 of the front
unit 35 is dug down in the direction of the front side surface 31 to form a recess 352. As shown
in FIG. 6, the concave portions 352 are formed at two positions in the lateral direction. The driver
4 corresponding to the audio electrical signals of the left and right channels is attached to the
recess 352.
[0021]
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At the bottom of the recess 352, a mounting portion 6 for mounting the driver 4 is formed. The
mounting portion 6 is a flat plate having substantially the same size as the driver 4, and a
groove-shaped portion having a small thickness with the front side surface 31 is formed around
the mounting portion 6. It is higher than the bottom of the Further, the upper surface of the
mounting portion 6 is substantially parallel to the front side surface 31, and the mounting
portion 6 is easily vibrated in the direction of the front side surface 31 by forming a thin portion
around the mounting portion 6. The vibration is efficiently transmitted to the front side surface
31.
[0022]
As shown in FIG. 6, mounting holes 71 and 72 for mounting the driver 4 with a tapping screw 90
are formed in the vicinity of the four corners of the mounting portion 6. The mounting hole 71 is
a through hole extending from the mounting portion 6 to the front side surface 31 of the
vibrating box 3 and is formed at one position at an upper central angle. The attachment holes 72
are formed in the remaining three places, and extend from the attachment portion 6 to the inside
of the bottom surface of the recess 352 rather than the through holes. The mounting holes 71
and 72 are smaller in diameter than the tapping screw 9 and the tapping screw 11, and the
driver 4 tightens the tapping screw 9 through the mounting holes 71 and 72 as shown in FIG. It
is fixed at 35. FIG. 8 shows a view of the attached driver 4 as viewed from the joint surface 351.
[0023]
As shown in FIGS. 6 and 7, the catchers 81 and 82 are constituted by a donut-shaped magnet 10
and a magnetic tapping screw 11 inserted in the center thereof, and the tapping screws 11 of the
catchers 81 and 82 are used. It is attached to the front side 31. With this configuration, a
magnetic field is generated between the head of the tapping screw 11 and the magnet 10 in
addition to the magnetic field generated by the donut-shaped magnet 10 on the front side
surface 31 side. Specifically, a pole of the opposite polarity to the pole of the magnet 10 is newly
formed on the head of the tapping screw 11 at the center of the catchers 81 and 82. As a result,
at the time of adsorption with the hold medals 51 and 52, the convex portion at the center of the
hold medals 51 and 52 is adsorbed to the recess of the head portion of the tapping screw 11,
which facilitates centering. Further, the attachment of the vibration plate 2 is strengthened and
stabilized.
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[0024]
The mounting hole 71, which is a through hole extending over the front side surface 31 of the
vibration box 3, is used for mounting the catcher 81 in addition to the mounting of the driver 4.
In addition, for the attachment of the catcher 82, the attachment hole 73 is formed in the front
side 31 side of the vibration box 3. As shown in FIG.
[0025]
Among the catchers, the left and right catchers 81 are in the mounting holes 71 and the central
catcher 82 is. By tightening the tapping screw through the mounting hole 73, the catchers 81
and 82 are fixed to the front side 31 of the vibrating box 3. In this case, when the tapping screw
11 of the catcher 81 attached to the mounting hole 71 is tightened, the threaded portion at the
tip of the tapping screw 11 is the threaded portion at the tip of the tapping screw 9 passed
through the mounting hole 71 for attaching the driver 4 It will approach to an overlapping
position and will contact and both screw parts will mesh while rotating. Then, both tapping
screws 9 and 11 are firmly tightened, and the driver 4 is strongly pulled in the direction of the
mounting portion 6, and at the same time, the catcher 81 and the driver 4 are strongly connected
via the mounting portion 4.
[0026]
As a result, the vibration from the driver 4 of one channel is directly transmitted to the left and
right catchers 81 via the tapping screws 9 and 11, and the vibration of the vibration box 3 is
transmitted. The vibration of the vibration box 3 is transmitted to the central catcher.
[0027]
The vibrating plate 2 is connected to the vibrating box 3 at three points by the left and right
catchers 81 and the central catcher 82. As a result, the vibrating plate 2 is fixed to the vibrating
box 3 in a state in which the front, rear, left, and right postures are stable.
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[0028]
As shown in FIG. 7, the rear unit 36 is formed with a recess 362 opening on the bottom surface
33 side, and a through hole 363 connecting the recess 362 and the recess 352 of the front unit
35 is formed. The signal code (not shown) of the driver 4 is introduced into the recess 362
through the through hole 363. Further, an amplifier is incorporated in the recess 362 as
necessary, and the power cord and the signal code (not shown) are led to the outside from the
opening on the bottom surface 33 through the recess 362. The joint surface 361 of the rear unit
36 and the joint surface 351 of the front unit 35 are bonded to form the integrated vibration box
3.
[0029]
In this embodiment, the vibration box 3 uses a hinoki as a material, and the size thereof is
approximately 115 mm. The one having a width of about 300 mm and a depth of about 117 mm
was used. In addition, as with the vibration plate, the surface is painted, for example, in the same
manner as painting of a guitar or the like. In addition, as a material of the vibration box 3,
another kind of wood can be used, and not only wood but also metal etc. can be used.
[0030]
In order to combine the vibration plate 2 and the vibration box 3 to assemble the speaker system
1, the hold medals 51 and 52 of the vibration plate 2 are brought into contact with the positions
of the catchers 81 and 82 of the vibration box 3. In this case, the hold medals 51 and 52 are
attracted by a relatively strong force by magnetic force, so that they are brought into contact so
that they are aligned to a certain extent, and then slide the vibrating plate 2 laterally (in a
direction parallel to the surface). Accurate alignment between the catchers 81 and 82 is
performed. Even when the sound box 3 is removed from the vibration plate 2, the vibration plate
2 is slid in the lateral direction so as to be removed at a position where the attraction force by
the magnetic force is weak.
[0031]
In such a configuration, the audio electric signals of the left and right two channels are converted
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into mechanical vibration by the left and right drivers 4 in the vibration box 3, and this vibration
is the entire vibration box 3 including the front unit 35 through the attachment portion 6.
Transmitted to The vibration of each of the left and right drivers 4 is guided to the surface of
each of the left and right catchers 81 via the tapping screw 9 for attaching the driver 4 and the
tapping screw 11 of the catcher 81 mechanically in contact therewith. The central catcher 82 is
guided by the vibration of the entire vibration box 3. That is, the vibrations of the left and right
channels are mixed and supplied.
[0032]
The vibration is transmitted from the left and right catchers 81 and the central catcher 82 to the
vibrating plate 2 via the hold medals 51 and 52, and the mixed vibration of these causes the
curved portions 21 and 22 of the vibrating plate 2, mainly The curved portion 21 is resonated,
and the generated sound is emitted to the space. The vibration from the central catcher 82 is a
mixture of left and right channel vibrations, and the resonance effect of the vibrations makes the
sound rich.
[0033]
In the experiment by the inventor of the present invention, in the case where the curved plate
portion of the vibrating plate is one, chattering noise is generated due to resonance, but the
curved portion 22 is provided in addition to the curved surface portion 21 to shift the resonance
point. The generation of chattering noise could be prevented, and good sound quality was
obtained. Specifically, although resonance occurs at a specific frequency (about 150 Hz to 250
Hz), by configuring as described above, the sound is impaired when operated at a normal volume
for a range of 10 Hz to 10 kHz. No vibration occurred. Further, although the volume is increased
by the curvature of the curved surface portion 21 of the vibrating plate 2, according to the
inventor's experiment, the curvature of the curved surface portion 21 is around 15% to 20% of
the depth of the curvature with respect to the longitudinal length. But the volume was relatively
stable.
[0034]
The sound generated by the resonance differs depending on the material of the vibration plate 2
and becomes the timbre of the vibration sound due to the characteristics of the material. In this
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embodiment, since wood is used as the material, the sound has a tone similar to that of a stringed
instrument such as a guitar or a violin. The vibration from the driver 4 is transmitted to the
vibration box 3 as described above, and even if the vibration plate 2 is not coupled, a sound is
generated from the vibration box 3 and therefore it can be used as a speaker as it is .
[0035]
DESCRIPTION OF SYMBOLS 1 speaker system 2 vibration plate 21 curved surface portion 22
curved surface portion 3 vibration box 31 front side surface 32 rear side surface 33 bottom
surface 34 end surface 35 front side unit 351 bonding surface of front side unit concave portion
36 rear side unit 361 rear side unit bonding surface 362 concave surface 363 Through hole 4
Driver 51, 52 Hold medal 6 Mounting portion 71, 72, 73 Mounting hole 81 82 Catcher 9
Tapping screw 10 Magnet
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