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JP2008042615

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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 JP2008042615
The present invention provides a speaker device capable of obtaining high sound pressure with a
small space. SOLUTION: A first diaphragm 21b, a second diaphragm 21c, a third diaphragm 21d
and a vibration means 23 for oscillating the diaphragms 21 are provided on both sides of the
substantially cylindrical speaker frame 1. The speaker units 2 provided are disposed opposite to
each other so that the left and right diaphragms 21 are alternately arranged, and the speaker
frame 1 is provided with an audio output hole 11 for outputting audio from between the
diaphragms 21 to the outside. Furthermore, the winding width L1 of the voice coil is set to the
length L2 of the arrangement interval between the left first diaphragm 21b and the right third
diaphragm 21d, the left second diaphragm 21c, and the right second diaphragm 21c. The length
L2 of the arrangement interval, the length L2 of the arrangement interval between the left third
diaphragm 21d and the right first diaphragm 21b, and the length L2 of the arrangement interval
are approximately half. [Selected figure] Figure 3
Speaker device
[0001]
The present invention relates to a speaker device.
[0002]
The conventional speaker device is configured to include a voice coil provided on one diaphragm,
a pole loosely inserted in the voice coil, and a magnet fixed to the pole and arranged to cover the
voice coil. The diaphragm vibrates back and forth to make it sound by sending an electric signal
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(voice signal) to the voice coil.
However, since the conventional speaker device has such a structure, it is extremely difficult to
obtain high sound pressure in a space-saving manner.
[0003]
Therefore, the following speaker device has been proposed. In the speaker device, a top plate and
a bottom plate are provided at the upper and lower portions of the magnet, yokes are provided at
the outer periphery to form upper and lower magnetic gaps, and upper and lower voice coils are
arranged half offset to these magnetic gaps. The diaphragm is placed on top of the dual gap voice
coil 7 and supported by upper and lower dampers. According to this speaker device, it is possible
to provide a speaker unit that enables bass reproduction by obtaining a sufficient drive range
and input resistance even with a small aperture (see, for example, Patent Document 1). JP-A-9182188 (page 1, FIG. 1)
[0004]
However, in the above-described prior speaker device, there is a limit to the improvement of
performance because the number of diaphragms which are members to be made to sound is the
same as that of the conventional one. Therefore, if a speaker device is configured by arranging a
plurality of diaphragms in parallel in one speaker frame, the performance can be further
improved. However, if the amplitude of each diaphragm is different, its performance There is a
big difference in
[0005]
Then, this invention is made in view of such a condition, and it aims at providing the speaker
apparatus which can solve the said problem.
[0006]
In order to achieve the above technical problems, the speaker device according to the present
invention takes the following technical measures.
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That is, in the speaker device according to the present invention, a plurality of diaphragms
arranged in parallel at predetermined intervals in a substantially cylindrical speaker frame are
connected via the vibrating rod, and the plurality of diaphragms Among them, a vibration means
engaged with a diaphragm disposed at one end to excite the diaphragm is supported by the
speaker frame, and each of the diaphragms is configured to be tunable, and the speaker frame
includes a plurality of A speaker device including a sound output hole for outputting sound from
between the diaphragms to the outside and a partition wall provided at a required position at the
center between the diaphragms, the vibration being provided. The means is disposed so as to
cover the voice coil fixed to the voice coil provided on the diaphragm disposed at one end, a pole
loosely inserted in the voice coil, and the pole. The voice coil and the winding width of the voice
coil is substantially the same as the length of the arrangement interval between the diaphragm
and the partition wall or about the length of the arrangement interval between the diaphragm
and the partition wall It is characterized in that it is about 10% longer. Further, in the speaker
device according to the present invention, a plurality of diaphragms arranged in parallel at
predetermined intervals in a substantially cylindrical speaker frame are connected via a vibrating
rod, and the plurality of diaphragms Among the above, the speaker unit is supported by the
speaker frame by vibration means engaged with a diaphragm disposed at one end to excite the
diaphragm, and a speaker unit configured such that each of the diaphragms can be tuned to the
speaker The speaker device is disposed opposite to both sides of the frame, and the speaker unit
is in communication with one of the oscillating wedges disposed opposite to the diaphragm other
than the diaphragm with which the oscillating means is engaged. A hole is provided, and the
plurality of diaphragms constituting each of the speaker units are alternately disposed, and the
speaker units are disposed to be opposed to both sides of the speaker frame. The speaker frame
is provided with an audio output hole for outputting a sound to the outside from among the
plurality of diaphragms arranged alternately, and the vibration means is a voice provided on the
diaphragm arranged at one end A coil, a pole loosely inserted in the voice coil, and a magnet
fixed to the pole and disposed so as to cover the voice coil, and the winding width of the voice
coil is a plurality of juxtaposed It is characterized in that the length is approximately half the
length of the arrangement interval of the diaphragms or the length of the arrangement interval.
[0007]
According to the present invention, a plurality of diaphragms connected via a vibrating rod are
arranged side by side in a substantially cylindrical speaker frame via a dividing wall, and the
vibration means is engaged with the diaphragm arranged at one end. In addition, since the
plurality of diaphragms are vibrated and sounded by this one vibration means, high sound
pressure can be obtained with space saving. In addition, the diaphragm is used until it interferes
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with the partition wall, with the winding width of the voice coil which is one constituent member
of the vibration means approximately the same as the length of the arrangement interval
between the diaphragm and the partition wall or about 10% longer. By making it technically
possible to vibrate, it is possible to provide an extremely efficient speaker device with limited
space by accurately controlling the diaphragm just before interfering with the partition wall.
[0008]
Further, since a plurality of diaphragms constituting the speaker unit are formed and the
respective diaphragms disposed opposite to each other are alternately arranged, higher sound
pressure can be obtained with space saving. The winding width of the voice coil, which is a
constituent member, is approximately half the length of the arrangement interval of the plurality
of the diaphragms arranged in parallel or about the length of the arrangement interval, until the
diaphragms interfere with each other. By making it possible to vibrate the plates technically, by
controlling each diaphragm accurately just before the diaphragms interfere with each other, an
extremely efficient speaker device is provided in a limited space. it can.
[0009]
Next, an embodiment of a speaker device according to the present invention will be described
with reference to the attached drawings.
1 and 2 show Embodiment 1, FIGS. 3 and 4 show Embodiment 2, and FIGS. 5 and 6 show
modifications of the speaker frame.
[0010]
Embodiment 1 As shown in FIGS. 1 and 2, a speaker device A according to Embodiment 1
includes a speaker frame 1, a diaphragm 21, a vibrating rod 22, and a vibrating unit 23. It is
done.
[0011]
The speaker frame 1 is formed in a substantially cylindrical shape in which an end on one side is
formed substantially in a bowl shape and an end on the other side is closed by an outer wall 11
b.
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A plurality of diaphragms 21 to be described later are juxtaposed inside the speaker frame 1, and
a partition wall 11c is provided at a required position at the center between the diaphragms 21,
and further, the partition wall A plurality of elongated sound output holes 11 are opened so that
sound is output to the outside from the respective diaphragms 21 arranged on both sides of 11 c.
[0012]
Further, an insertion hole 11d is provided in the center of the above-mentioned partition wall
11c, through which a vibration rod 22 described later is inserted. Further, on the inclined surface
of the one end portion formed in a substantially mortar shape, a hole 12 (a hole for air leakage)
for sound leakage of a first diaphragm 21b to be described later is provided. The end face of the
side end portion is provided with an opening 13 in which a cylindrical portion 23c described
later is loosely inserted.
[0013]
The diaphragm 21 is disposed at one end of the speaker frame 1 formed in a substantially bowl
shape, and the first diaphragm 21 b is connected to the substantially bowl-shaped top of the
speaker frame 1 via an edge 21 a. The second diaphragm 21c connected to the inner wall of the
speaker frame 1 via the edge 21a at the middle position between the partition walls 11c and the
edge 21a at the center between the outer wall 11b and the partition wall 11c near the outer wall
11b. And a third diaphragm 21 d connected to the inner wall of the speaker frame 1. These first
to third diaphragms 21b are formed flat.
[0014]
The vibrating rod 22 connects the insertion hole 11 d so as to connect the center of the first
diaphragm 21 b and the center of the second diaphragm 21 c and the center of the second
diaphragm 21 c and the center of the third diaphragm 21 d. The first diaphragm 21b, which is a
rod-shaped member installed via each of the first diaphragm 21b and the second diaphragm 21c
and the third diaphragm 21d, are synchronized with each other.
[0015]
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The vibrating means 23 includes a tapered portion 23b whose one end on the enlarged diameter
side is connected to the edge 21a of the first diaphragm 21b and a cylindrical portion 23c
connected to the tapered portion 23b, and a taper A damper 23d is provided so as to project
from the intersection of the portion 23b and the cylindrical portion 23c and has an outer
peripheral portion connected to the speaker frame 1, and a voice coil 23e wound around the
outer periphery of the cylindrical portion 23c in a substantially bowl shape. The substantially
cylindrical magnet 23f attached to the end face of the speaker frame 1 is connected to the end
face of the magnet 23f, with the opening 13 provided on the end face of the speaker frame 1
formed on one side as a center It comprises a pole 23g having a substantially T-shaped cross
sectional view, which is loosely inserted into the cylindrical portion 23c.
[0016]
The winding width L1 of the voice coil 23e is substantially the same as the length L2 of the
arrangement interval between each diaphragm 21 and the partition wall 11c (or the outer wall
11b), or each diaphragm 21 and the partition wall 11c (or the outer wall) 11b) is approximately
one tenth of the length L2 of the arrangement interval.
In this manner, by making it possible to vibrate the diaphragm 21 technically until it interferes
with the partition wall 11c, control of the diaphragm 21 can be accurately performed just before
interfering with the partition wall 11c. Thus, the speaker device A is extremely efficient.
[0017]
The speaker device A according to the first embodiment configured as described above causes
the voice coil 23e to move forward and backward with respect to the fixed magnet by flowing an
electric signal (voice signal) to the voice coil 23e. The vibration is transmitted to the vibration
transmitting portion 23a, the first vibrating plate 21b, the vibrating rod 22, the second vibrating
plate 21c, and the third vibrating plate 21d.
In this manner, each of the first diaphragm 21b, the second diaphragm 21c, and the third
diaphragm 21d vibrates back and forth to generate a sound, and the generated sound is
externally ringed through the sound output hole 11. Do.
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[0018]
As described above, the speaker device A according to the present embodiment includes the first
diaphragm 21b, the second diaphragm 21c, and the third vibration connected to the substantially
tubular speaker frame 1 via the vibrating rod 22. The vibration means 23 is engaged with the
first diaphragm 21b disposed at one end with the plates 21d arranged in parallel, and the first
diaphragm 21b, the second diaphragm 21c, and the third diaphragm 21b are combined by this
one vibration means 23. Since each diaphragm 21 of the diaphragm 21d is vibrated to make it
sound, high sound pressure can be obtained with space saving.
[0019]
Moreover, the winding width L1 of the voice coil 23e which is a component of the vibration
means 23 is substantially the same as the length L2 of the arrangement interval between each
diaphragm 21 and the partition wall 11c (or the outer wall 11b) It is technically possible to
vibrate the diaphragm 21 until it interferes with the partition wall 11c, as an additional length of
about one tenth of the length L2 of the arrangement interval between the H.21 and the partition
wall 11c (or the outer wall 11b) By accurately controlling the diaphragm 21 just before
interfering with the partition wall 11c, the speaker device A is extremely efficient with a limited
space.
[0020]
Second Embodiment Next, a speaker device A according to a second embodiment will be
described.
The same reference numerals as in the first embodiment are used for the same components as in
the first embodiment.
As shown in FIGS. 3 and 4, the speaker device A according to the second embodiment includes
the speaker frame 1 and the pair of speaker units 2, and the speaker unit 2 is provided on both
sides of the speaker frame 1. Are arranged oppositely.
[0021]
The speaker frame 1 is a thin plate member, and both end portions thereof are formed in a
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substantially bowl shape, and an intermediate portion is formed in a substantially cylindrical
shape. The speaker frame 1 has a plurality of diaphragms 21 which will be described later
arranged in parallel. The speaker frame 1 has a length such that voices are outputted from the
respective diaphragms 21 to the outside at a required position between the diaphragms 21. A
plurality of sound output holes 11 in the form of holes are opened.
[0022]
Further, on the inclined surfaces of both ends formed in a substantially mortar shape, holes 12
(air holes) for sound leakage of the first diaphragm 21b described later are provided, and both
sides formed in a substantially mortar shape The end face is provided with an opening 13 in
which a cylindrical portion described later is loosely inserted.
[0023]
The speaker unit 2 is configured to include a diaphragm 21, a vibrating rod 22, and a vibrating
unit 23.
[0024]
The diaphragm 21 is disposed at a substantially bowl-shaped end of the speaker frame 1, and the
left and right first diaphragms 21b are connected to the substantially bowl-shaped top of the
speaker frame 1 via an edge 21a. The left and right second diaphragms 21c connected to the
inner wall of the speaker frame 1 via the edge 21a at a required distance from the first
diaphragm 21b and the edges at a required distance from the second diaphragm 21c The left
and right third diaphragms 21 d are connected to the inner wall of the speaker frame 1 through
21 a.
[0025]
The arrangement relationship between the left and right first diaphragms 21b, the left and right
second diaphragms 21c, and the left and right third diaphragms 21d is, as illustrated, the left
first diaphragm 21b and the left second diaphragm 21c. Between the second diaphragm 21c on
the left and the second diaphragm 21c on the right between the second diaphragm 21c on the
left and the third diaphragm 21d on the left, and the right A first diaphragm 21b is disposed, and
an insertion hole 21e through which a vibration rod 22 described later is inserted is provided in
each of the left and right second diaphragms 21c and the left and right third diaphragms 21d.
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It is preferable that the insertion holes 21e be at one place as close as possible to the center of
the diaphragm 21 as much as possible, but in the case of two places or three places, it is
preferable to arrange them equally. (It is noted that the illustration is described exaggeratingly
and off-center from the case where there is one point near the center).
The left and right first to third diaphragms 21d are formed flat.
[0026]
The vibrating rod 22 is connected to the first diaphragm 21b and the second diaphragm 21c, and
is connected to the second diaphragm 21c and the third diaphragm 21d. The first diaphragm
21b, the second diaphragm 21c, and the first diaphragm 21b, which are rod-shaped members
installed respectively through the insertion holes 21e formed in the 21c and the third diaphragm
21d, are excited by the vibration unit 23 described later. The three diaphragms 21d are in phase
with each other.
[0027]
The vibration means 23 includes a vibration transmitting portion constituted by a tapered
portion whose one end side expanded in diameter is connected to the edge 21 a of the first
diaphragm 21 b and a cylindrical portion connected to the tapered portion, a tapered portion and
a cylindrical portion And a damper having an outer peripheral portion connected to the speaker
frame 1 and a voice coil wound around the outer periphery of the cylindrical portion, and the
speaker frame 1 on one side formed substantially in a bowl shape. A substantially cylindrical
magnet attached to the end face of the speaker frame 1 with an opening 13 provided at the end
face, and a terminal end face of the magnet connected to the magnet and loosely inserted in the
cylindrical portion. And a pole-shaped pole, which is disposed on both sides of the speaker frame
1 so as to face each other.
[0028]
The winding width L1 of the voice coil described above is the length L2 of the arrangement
interval between the left first diaphragm 21b and the right third diaphragm 21d, the left second
diaphragm 21c, and the right second diaphragm 21c. Approximately half the length of the
arrangement interval L2 between them and the arrangement interval L2 between the left third
diaphragm 21d and the right first diaphragm 21b, or about the arrangement interval L2 ing.
[0029]
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In the speaker device A according to the present embodiment configured as described above, the
voice coil moves back and forth with respect to the fixed magnet by flowing an electrical signal
(voice signal) to each of the voice coils disposed opposite to each other. This propagates to the
vibration transmitting portion, the first diaphragm 21b, the vibrating rod 22, the second
diaphragm 21c, and the third diaphragm 21d.
In this manner, each of the first diaphragm 21b, the second diaphragm 21c, and the third
diaphragm 21d vibrates back and forth to generate a sound, and the generated sound is
externally ringed through the sound output hole 11. Do.
[0030]
Thus, the speaker device A according to the present embodiment includes the first diaphragm
21b, the second diaphragm 21c, the third diaphragm 21d, and the diaphragms thereof on both
sides of the speaker frame 1 formed in a substantially cylindrical shape. The speaker units 2
provided with vibration means 23 for exciting 21 are arranged opposite to each other so that the
left and right diaphragms 21 alternate, and sound is output to the outside from between the
diaphragms 21 in the speaker frame 1 Since the sound output hole 11 is provided, high sound
pressure can be obtained with space saving.
[0031]
Moreover, the winding width L1 of the voice coil is set to the length L2 of the arrangement
interval between the left first diaphragm 21b and the right third diaphragm 21d, the left second
diaphragm 21c, and the right second diaphragm 21c. The length L2 of the arrangement interval,
the length L2 of the arrangement interval between the left third diaphragm 21d and the right
first diaphragm 21b, or the length L2 of the arrangement interval By technically making it
possible to vibrate the respective diaphragms 21 until they interfere with each other, it is
possible to accurately control the respective diaphragms 21 just before they interfere with the
diaphragms 21. The speaker device A is extremely efficient with a limited space.
[0032]
Further, as shown in FIG. 5, the edge 11a of the sound output hole 11 is formed in a convexly
curved shape that gradually widens outward, or as shown in FIG. By attaching the inclined
surface-like member 14 which becomes gradually wider toward the outer side, distortion of
sound can be reduced, and a speaker device A of higher quality can be obtained.
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[0033]
The specific embodiment has been described above, but the present invention is not limited to
the above embodiment, and it goes without saying that the present invention can be
implemented with appropriate modifications without departing from the scope of the invention.
[0034]
For example, in the present embodiment, the number of diaphragms 21 is three (three each in
the left and right in the second embodiment), but two, four or more diaphragms 21 may be used.
good.
Moreover, although the substantially cylindrical thing is illustrated as the speaker frame 1 in this
Embodiment, a rectangular thing may be used.
[0035]
FIG. 1 is a side view of a speaker device according to a first embodiment.
It is a longitudinal side view the same.
FIG. 7 is a side view of the speaker device according to Embodiment 2;
It is a longitudinal side view the same.
It is a vertical side view of the 1st modification of a speaker frame.
It is a vertical side view of the 2nd modification of a speaker frame.
Explanation of sign
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[0036]
A Speaker device 1 Speaker frame 11 Audio output hole 11a Edge 11b Outer wall 11c Partition
wall 11d Insertion hole (for partition wall) 12 Sound leakage hole 13 Opening 14 Slope member
2 Speaker portion 21 Diaphragm 21a Edge 21b 1st Diaphragm 21c Second diaphragm 21d Third
diaphragm 21e Insertion hole 22 Vibrator 23 23 Vibration means 23a Vibration transmitter 23b
Taper 23c Tube 23d Damper 23e Voice coil 23f Magnet 23g Pole L1 Voice coil winding width L2
Or the length of the spacing between the diaphragm and the partition wall
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