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JP2005197849

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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 JP2005197849
The sound from the back of a diaphragm of a speaker system collides with a frame or a magnetic
circuit portion, causing reflection or blocking free radiation, without adversely affecting the
emission of sound waves to the front, a frame It is an object of the present invention to provide a
beautiful high-sound quality speaker with a low noise without interfering with the radiation of
the acoustic wave of the diaphragm and the magnetic circuit components. A horn is disposed on
the front and back sides of a diaphragm, and a magnetic circuit component and a voice coil are
disposed outside the horn load, and the voice coil outside the horn load and vibrations in the
horn load The plate is adhesively bonded through the connecting member, and the vibrating
plate is vibrated to solve the problem. [Selected figure] Figure 1
スピーカユニット
[0001]
The present invention relates to a speaker unit that converts an audio signal into sound.
[0002]
As an example of a conventional speaker unit, a moving coil type as shown in FIG. 5 and FIG. 6 is
used.
A voice current is supplied to a voice coil placed in a strong magnetic field to cause the voice coil
to move in a piston, and its vibration is transmitted to a conical or dome-shaped diaphragm to
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1
vibrate air. Also, a horn type in which a horn is attached to the front surface of the diaphragm as
shown in FIG.
[0003]
By the way, in the speaker apparatus using the above-mentioned speaker unit, when the
diaphragms 14, 22 and 28 vibrate, in addition to the sound waves radiated to the front surface of
the diaphragm, the phase is 180 degrees on the back surface of the diaphragm. Different sound
waves are emitted. Since the sound on the back side causes sound reflections or vibrations due to
sound in the speaker device and adversely affects the sound coming out of the front side, it
absorbs the sound coming out of the back side of the diaphragm, so Products equipped with a
sound absorbing material are in widespread use.
[0004]
However, compared to the raw sound emitted by the instrument, the conventional loudspeakers
tend to be less radiant and tend to be louder when the volume is increased. One of the reasons is
that the sound from the back of the diaphragm immediately collides with the frame 17 and the
magnetic circuit units 20, 25 and 30 to cause reflection or to prevent free radiation, thereby
causing the diaphragms 14, 22 and 28 to Free movement was restrained, and the radiation of the
sound wave to the front was also adversely affected, and the reproduction of the faithful original
sound was hindered.
[0005]
Further, in the case of the conventional speaker, since the space on the back side of the
diaphragm is narrow, the back pressure is higher than that on the front, and a phenomenon
occurs that the movement of the diaphragm is impeded.
[0006]
In the above-described conventional speaker system, the sound on the back of the diaphragm
immediately collides with the frame 17 and the magnetic circuit units 20, 25 and 30, causing
reflection and preventing free radiation, whereby the diaphragms 14 and 22 are produced. 28.
Free movement was restrained, and the radiation of the sound wave to the front was also
adversely affected, and faithful original sound reproduction was hindered.
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[0007]
In addition, since the space on the back surface of the diaphragm is narrow, the back pressure
becomes higher than that on the front surface, and a phenomenon occurs in which movement of
the diaphragms 14, 22, 28 is hindered.
[0008]
The present invention has been made in view of the above-described point, and its object is to
make the back pressure applied to the diaphragm equal to that of the front, and the frame and
the magnetic circuit unit do not interfere with the radiation of the acoustic wave of the
diaphragm and generate less noise. The challenge is to provide a beautiful high-quality speaker.
[0009]
In the speaker unit of the present invention, the horn is disposed on the front side and the back
side of the diaphragm, and the magnetic circuit component and the voice coil are disposed
outside the horn load, and the piston movement of the voice coil outside the horn load The above
problem is solved by connecting the vibration plate to the diaphragm in the horn load via the
connecting member and vibrating the diaphragm.
[0010]
In the speaker unit of the present invention, the sound on the back of the diaphragm collides
with the frame or the magnetic circuit portion to cause reflection or to be radiated in the back
direction without interference of free radiation, so that the free movement of the diaphragm is
Unrestrained, it is possible to perform more faithful original sound reproduction without
adversely affecting the sound emission to the front.
[0012]
Further, since the back surface of the diaphragm is open, the difference in load resistance before
and after the diaphragm is small, the followability of the diaphragm to the signal is improved,
and the sound quality can be improved.
In particular, by using it as a squawker or tweeter for middle to high tones, it is possible to
reproduce a beautiful original sound with little noise.
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BEST MODE FOR CARRYING OUT THE INVENTION
[0013]
1 and 2 show an example of a speaker unit according to the present invention. FIG. 1 is a
sectional view, and FIG. 2 is a perspective view.
In the figure, reference numeral 1 denotes a diaphragm, which is made of wood, carbon fiber,
plastic or the like and is attached near the front and rear middle of the horn 4 via the edge of the
outer peripheral code 2.
[0014]
The code 4 is a horn made of wood, metal, plastic or the like, characterized in that it has opening
faces on the front and back sides of the diaphragm, and has a structure in which the horns are
arranged back to back at an angle of about 130 degrees. It has become.
In addition, a hole is made through the connecting member for connecting the piston movement
of the voice coil to the diaphragm.
[0015]
The code | symbol 6 consists of a permanent magnet, a center pole, and a top plate in a magnetic
circuit part, and is attached to a horn so that the sound path and opening part of the horn by the
side of back may not be covered.
[0016]
Reference numeral 3 denotes a connecting member, which is made of wood, metal or carbon
fiber and is adhesively bonded to the diaphragm of the code 1 and the voice coil of the code 7 so
that the diaphragm vibrates when the voice coil vibrates. There is.
[0017]
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4
The sound wave is emitted also in the back direction, so the speaker unit of the present invention
can be mounted on a bass enclosure etc. and can be used as a multi-way medium / high-tone
squawker or tweeter unit.
[0018]
3 and 4 show another example of the speaker unit according to the present invention. FIG. 3 is a
cross-sectional view, and FIG. 4 is a perspective view.
In the figure, reference numeral 8 denotes a diaphragm, which is made of wood, carbon fiber,
plastic or the like, and is attached near the front and rear middle of the horn 10 through the edge
of the code 12 at the outer periphery thereof.
[0019]
The code 10 is a horn made of wood, metal, plastic or the like, characterized in that it has
opening faces on the front and back sides of the diaphragm, and the horn load is bifurcated,
opening at an angle of about 90 degrees What you are doing is a back-to-back structure.
In addition, a hole is made through the connecting member for connecting the piston movement
of the voice coil to the diaphragm.
[0020]
Reference numeral 11 denotes a magnetic circuit unit which comprises a permanent magnet, a
center pole, and a top plate, and is attached between the horn and the crotch of the horn so as
not to block the sound path or opening of the horn on the back side.
[0021]
Reference numeral 9 is a connecting member, which is made of wood, metal, carbon fiber or the
like and is adhesively bonded to the diaphragm of the reference numeral 8 and the voice coil of
the reference numeral 13, so that the diaphragm also vibrates when the voice coil vibrates. There
is.
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[0022]
Since the speaker unit of the present invention emits a sound wave also in the back direction, it is
mounted on a bass enclosure etc., and it is a squawker or tweeter having wide directivity for
multi-tone system medium to high sound. It can be used as a unit.
[0023]
It is sectional drawing of an example of the speaker unit of this invention.
It is a perspective view of an example of the speaker unit of the present invention.
It is sectional drawing of another example of the speaker unit of this invention.
It is a perspective view of another example of the speaker unit of this invention.
Sectional drawing which showed an example of the speaker unit using the conventional coneshaped diaphragm.
Sectional drawing which showed an example of the speaker unit using the conventional dome
shaped diaphragm.
It is sectional drawing which showed an example of the conventional horn type speaker unit.
Explanation of sign
[0024]
Reference Signs List 1 diaphragm 2 edge 3 connecting member 4 horn 5 damper 6 magnetic
circuit 7 voice coil 8 diaphragm 9 connecting member 10 horn 11 magnetic circuit 12 edge 13
voice coil 14 diaphragm 15 edge 16 damper 17 frame 18 voice coil 19 sound absorption 20
magnetic circuit unit 21 enclosure 22 diaphragm 23 edge 24 frame 25 magnetic circuit unit 26
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sound absorbing material 27 voice coil 28 diaphragm 29 horn 30 magnetic circuit unit 31 voice
coil 32 sound absorbing material
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