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JP2008042614

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Notice
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complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JP2008042614
[PROBLEMS] To provide a speaker device capable of obtaining high sound pressure in a small
space and suppressing distortion of sound. 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. Further, the voice output hole
11 is formed in a convexly curved shape that gradually widens outward. [Selected figure] Figure
2
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
(voice signal) to the voice coil.
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1
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. Moreover, since the yoke inner wall above the diaphragm is
formed in a vertical shape, distortion of sound is likely to occur in the yoke supporting the
diaphragm.
[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.
That is, in the speaker device according to the present invention, the speaker portion including
the diaphragm and the vibration unit engaged with the diaphragm and generating the diaphragm
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2
is formed in a substantially cylindrical shape on both sides of the speaker frame. And the speaker
frame is provided with an audio output hole for outputting an audio from between the
diaphragms to the outside, and the audio output hole is gradually wider toward the outside. It is
characterized in that it is formed into a convexly curved shape or an inclined surface shape to
become. 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 an
audio from among the plurality of alternately arranged diaphragms to the outside, and the audio
output hole becomes gradually wider outward. It is characterized in that it is formed in a
convexly curved shape or an inclined surface shape.
[0007]
According to the present invention, on both sides of the substantially tubular speaker frame, the
speaker portion comprising the diaphragm and the vibration means for exciting the diaphragm is
disposed opposite to each other, and Since the sound output hole for outputting the sound to the
outside from between is provided, high sound pressure can be obtained with space saving. In
addition, since the sound output hole is formed in a convex curved shape or an inclined surface
that gradually widens outward, distortion of sound can be reduced. Moreover, since the
diaphragm which comprises a speaker part was comprised by multiple and each diaphragm
arranged oppositely was arranged alternately, high sound pressure can be obtained with space
saving, and the sound output hole is also made. Similarly to the above, since it is formed in the
shape of a convex curve or an inclined surface which gradually widens outward, distortion of
sound can be reduced.
[0008]
Next, an embodiment of a speaker device A according to the present invention will be described
with reference to the attached drawings. As shown in FIG. 1, the speaker device A according to
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the present embodiment includes a speaker frame 1 and a pair of speaker units 2, and the
speaker units 2 are disposed to face each other on both sides of the speaker frame 1. Be done.
[0009]
The speaker frame 1 is a thin plate member, and both end portions thereof are formed in a
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.
[0010]
As shown in FIG. 2, after the thin plate-like member to be formed by the speaker frame 1 is
pierced, the long hole-shaped audio output holes 11 and the top of the edge 21a formed on the
outer peripheral portion of each diaphragm 21 The edge 11a of the hole is bent so as to be
convexly curved (inward) toward the same height position. In other words, the voice output hole
11 is formed in a convexly curved shape that gradually widens outward.
[0011]
Further, on the inclined surfaces of both end portions formed in a substantially mortar shape,
holes for sound leakage 12 (air holes for venting) of each first diaphragm 21b described later are
provided, and one side formed in a substantially mortar shape On the end face of the end portion,
an opening 13 is provided in which a cylindrical portion 23c described later is loosely inserted.
[0012]
The speaker unit 2 is configured to include a diaphragm 21, a vibrating rod 22, and a vibrating
unit 23.
[0013]
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
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4
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.
[0014]
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.
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).
These left and right first to third diaphragms 21b are formed flat.
[0015]
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.
[0016]
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
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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. A substantially
cylindrical magnet 23f attached to the end face of the speaker frame 1 with the opening 13
provided on the end face of the speaker frame 1 formed, and the end face of the magnet 23f are
connected with the cylindrical portion 23c And a pole 23g having a substantially T-shaped crosssectional view, which is loosely inserted, and is disposed opposite to both sides of the speaker
frame 1 on both sides thereof.
[0017]
In the speaker device A according to the present embodiment configured as described above, the
voice coil 23e is opposed to the fixed magnet by flowing an electric signal (voice signal) to each
of the voice coils 23e disposed opposite to each other. Before and after, it propagates to the
vibration transmission unit 23a, the first diaphragm 21b, the vibration 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.
At this time, since the sound output hole 11 is formed in a convexly curved shape or an inclined
surface that gradually widens outward, distortion of the sound is reduced to realize high-quality
sound.
[0018]
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.
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Moreover, since the voice output hole 11 is formed in a convexly curved shape that gradually
widens outward, distortion of the sound is reduced to realize high-quality sound quality.
[0019]
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.
[0020]
For example, in the present embodiment, the number of left and right diaphragms 21 is three,
but the number of left and right diaphragms 21 is one each, that is, the speaker frame 1 is shared
and the speaker unit 2 is opposed It may be arranged (therefore, the insertion hole which passes
a vibration gutter becomes unnecessary), and the number of diaphragms 21 on either side may
be comprised by multiple other than three mentioned above.
Moreover, although the substantially cylindrical thing is illustrated as the speaker frame 1 in this
Embodiment, a rectangular thing may be used.
[0021]
Further, in the present embodiment, the thin plate-like member for forming the speaker frame 1
is bored and is moved toward the same height as the top of the edge formed on the outer
peripheral portion of each diaphragm 21 (inward Although the voice output hole formed by
bending the edge of the hole so as to be convexly curved is illustrated, instead of this bending,
the edge of the hole may be fixed by a convexly curved member. Moreover, you may form in not
the convex-curved shape but the inclined surface shape which becomes wide gradually toward
outward. Furthermore, as shown in FIG. 3, an inclined surface 14 may be attached to the outer
peripheral surface of the speaker frame 1 so as to gradually widen outward. Also in this case, it
may be a convexly curved member instead of the inclined surface.
[0022]
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It is a side view of a speaker device concerning this embodiment. It is a longitudinal side view the
same. It is a side view of the speaker apparatus of other aspects.
Explanation of sign
[0023]
A Speaker device 1 Speaker frame 11 Audio output hole 11a Edge 12 Sound leakage hole 13
Opening 14 Sloped surface member 2 Speaker 21 Diaphragm 21a Edge 21b 1st diaphragm 21c
2nd diaphragm 21d 3rd diaphragm 21e Insertion hole 22 Vibration rod 23 Vibration means 23a
Vibration transmission part 23b Tapered part 23c Tubed part 23d Damper 23e Voice coil 23f
Magnet 23g Pole
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