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JPS63244999

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DESCRIPTION JPS63244999
[0001]
FIELD OF THE INVENTION The present invention relates to a loudspeaker in which the front of a
cone loudspeaker is opposed. [Conventional technology] Conventionally, even in a single-cone
speaker system using one speaker, dedicated speakers for bass and treble or bass--mid-tonetreble to reproduce a wide range without difficulty In multi-speaker systems such as 2 and 1 or
multi-speaker systems that use a combination of two or more speakers, a large-sized speaker
with a large aperture is mounted in a single enclosure to fully reproduce bass. It is used.
However, when the diaphragm is moved in air, air load or radiation resistance occurs. Also, when
the diaphragm vibrates, the apparent mass of the diaphragm is increased by that amount in order
to move the air around it together. That is, an additional mass is generated. As the diameter of
the speaker increases, the radiation resistance and the additional mass also increase, so the
buffer capacity at the time of high output of the speaker increases and the engineering closure
becomes large and strong to stop receiving this. In the case of speakers that are to obtain
medium to high output, a large speaker system is used as a result. Also, in the single cone
speaker system and multi-speaker system, since the speaker is attached to the front baffle plate,
the diaphragm of the speaker, the vibration of the drive part is an enclosure through the frame of
the speaker, etc. The vibration of the enclosure follows the vibration of the diaphragm of the
speaker, and the air at the rear of the speaker is compressed by the vibration of the diaphragm of
the speaker and this air pressure presses the enclosure wall to vibrate, and the vibration of these
enclosures interferes with the vibration of the diaphragm of the speaker That is, the acoustic
characteristics of the enclosure affect the sound generation, causing the inability to reproduce
the original sound with high fidelity, and in the multi-speaker system, the vibration of the
diaphragm of the bass speaker itself is also a medium sound Speaker and high frequency speaker
speaker vibrations that affect the speed of these medium sound , Has resulted not cloudy the
pronunciation sound quality of the treble speaker. An object of the present invention is to
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provide a speaker in which the above-mentioned problems with the conventional speaker are
solved. [Means for Solving the Problems] The present invention is configured as follows in order
to achieve the above object. That is, the partition walls form both end chambers and a central
chamber, one side of the central chamber in the direction orthogonal to the direction in which
the both end chambers are aligned is opened as the front side, The front face of these coneshaped speakers is attached to face each other, and it projects toward the front side from the rear
side partition of the central room in the central part of the central room, and the sound wave
emitted from the cone-shaped speaker A protrusion is provided to be released to the side.
The in-phase component emitted from a plurality of cone-type speakers opposed to the
?action? is enhanced, and the size of the enclosure can be reduced accordingly, and a smallsized speaker with almost the same output as before can be provided. By providing a plurality of
bass speakers as described above with their front surfaces facing each other via the protrusions
in an enclosure separate from the middle and high-tone speaker enclosures independently of the
speakers , Improve the sound generation of the bass speaker to a clear crisp sound quality, as a
result to improve the sound production of the high tone speaker to a clear crisp sound quality
provided separately from this bass speaker, and It also improves the separability of the middle
and high-tone speakers to obtain high fidelity playback sound quality as a whole. An embodiment
of the present invention will be described below with reference to FIGS. 1 and 2. FIG. In the
figure, reference numeral 1 denotes an enclosure, in which a central chamber 2 and both end
chambers 3.degree. The front side of the central chamber 2, that is, one side in the direction
orthogonal to the direction in which the two end chambers 3.4 are arranged is open and the
other side is a rear wall 5. The partition walls constituting the central chamber 2 and both end
chambers 3.4 are all required. Both end chambers 3.4 are respectively divided by the partition
wall 6 into the emperor A and the chamber B. However, these chambers A and B are not
completely partitioned, and the rear end and the back of the partition wall 6 are separated. It
communicates by the space 7 provided between the walls 5. A through hole 8 is formed at a
position facing the partition wall 6 of the rear wall 5. Opposing partition walls of both end
chambers 3.4. Holes 11 opened from the room A to the central room 2 and from the room B to
the central room 2 are formed in the to, respectively, and the cone-shaped loudspeakers 12 for
bass are made to face their fronts in these holes 11 respectively. It is attached. Two diaphragm
type cone speakers 12 are attached to each of the partition walls 9.10. Further, at the central
portion of the central chamber 2, there is provided a projection I3 projecting forward from the
rear wall 5 of the central chamber 2 and emitting sound waves emitted from the low-pitched
cone-type speaker 12 to the front side of the central chamber 2. It is done. The projection 13 is
composed of baked sand 13 b filled in the chamber C between the rear wall 5 and the front side
of the central chamber 2. The curved plate 13a is convex toward the chamber C side. And each
cone-shaped speaker 12 is electrically connected to the terminal (not shown) attached to the
predetermined part of the back wall 5. As shown in FIG.
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The low band component of the left and right channels of the amplifier is input to this terminal.
Next, the operation of the speaker configured as described above will be described. The in-phase
component emitted from the plurality of opposed low-tone cone-shaped speakers 12 is enhanced,
and the size of the enclosure can be reduced accordingly, and a small-sized speaker having
almost the same output as that of the conventional can be provided. In a separate enclosure from
the high and low frequency speaker enclosures separately from the high and low frequency
sound speakers, as described above, the plurality of low-frequency cone speakers 12 are
mutually connected via their front faces 13 By providing them facing each other, the sound
generation of the low-pitched cone-shaped speaker 12 is improved to a clear crisp sound quality,
and as a result, the low-pitched cone is provided separately from the speaker 12. The sound
quality of the high-pitched speaker is improved to a clear crisp sound quality, and the
separability of the middle and high-pitched speakers is also improved to obtain high fidelity
reproduced sound quality as a whole. Further, since the partition walls constituting the central
chamber 2 and the both end chambers 3.4 are all firmly fixed (bolted) with the head screw 14 at
the required places, in the enclosure of this embodiment, each partition wall is in advance It is
stressed so that it is possible to obtain high fidelity reproduction sound quality without using
unnecessary stress on the enclosure when using the speaker. By the way, when the partition
walls of the enclosure are bonded not by bolting but by bonding, since the physical properties of
the partition material and the adhesive differ from each other, unnecessary stress is applied to
the bonding portion of the partition, This affects the reproduction sound quality, and is a factor
that can not obtain high fidelity reproduction sound quality. In the above embodiment, the
partition walls 9. Although two cone-shaped loudspeakers 12 for bass are attached to each of the
IOs, the present invention is not limited thereto. One IO bass speaker may be attached to each IO.
Further, in the embodiment described above, the central portion of the central chamber 2 is
provided with a projection 13 projecting forward from the rear wall 5 of the central chamber 2,
and the projection I 3 is made forward of the central chamber 2 from the rear wall 5. Although it
consists of a curved plate 13a that bulges to the side and baked sand + 3b filled in the chamber C
between the curved plate 13a and the back wall 5, it is not limited to this, and a cone shape for
bass It may be another shape as long as it is a protrusion that allows sound waves emitted from
the speaker 12 to be emitted to the front side of the central chamber 2, and the chamber C
between the curved plate 13 a and the rear wall 5 is baked sand 13 b You do not have to fill it.
[Effects of the Invention] According to the present invention, the partition walls form both end
chambers and a central chamber, and one side in a direction orthogonal to the direction in which
the both end chambers of the central chamber are aligned is opened as the front side. Conical
speakers are attached to the mutually opposing partition walls of both chambers with the front
surfaces of the cone speakers facing each other, and the central part of the central chamber
protrudes forward from the rear partition wall of the central chamber, the cone Since the
projection is provided to emit the sound wave emitted from the center speaker to the front side
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of the central chamber, the in-phase component emitted from the plurality of opposed cone
speakers is enhanced, and the size of the enclosure can be reduced accordingly. A small speaker
can be provided while having almost the same output as the conventional one, and it is
independent from the medium and high-tone speakers and is separate from the middle and hightone speaker enclosures. By providing a plurality of bass speakers in the rotor with their front
faces facing each other through the projections, the tone of the bass speaker can be improved to
crisp clear sound quality, and as a result, this The sound quality of the middle and high-tone
speakers provided separately from the bass speakers is improved to clear crisp sound quality,
and the separability of the middle and high-tone speakers is also improved, and overall highfidelity playback sound quality You can get
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a
longitudinal sectional view of the main part thereof.
2 ииииииииии Central room, 3.4 ииииииии End room, 5 иииииииииии Rear wall, 9.10 иииииииииииииииииииииииииииииииииииииииииииииииии Coneshaped speaker, 13. I4 и и и и и Head screw.
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