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DESCRIPTION JPS5363218

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DESCRIPTION JPS5363218
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a composite
speaker according to the present invention, and FIG. 2 is a sound pressure reproduction
frequency characteristic diagram of the speaker. W и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
и Frame 15 passive diaphragm.
The present invention relates to a composite speaker in which a high frequency range
reproduction speaker and a low frequency range reproduction speaker are coaxially coupled, and
in particular, to a frame outer peripheral portion of a combined low frequency range
reproduction speaker A passive diaphragm is attached so that the lower reproduction band limit
can be expanded. As well known, и и и и It is difficult for a single speaker to reproduce a frequency
band necessary for reproduction if it is sufficient for directivity and frequency characteristics to
have sufficient sound covering. Therefore, a complex type in which the reproduction band is
divided into several parts, appropriate speakers are selected for each band of 1? = 13-j ? ? 2
// ?, and these speakers are combined to reproduce the entire band necessary for hi-fi Speakers
are commonly used. Conventionally, when combining a plurality of speakers, in addition to a
method of attaching these speakers in parallel to the buckle plate, a high frequency range town
speaker and a low frequency range reproduction phase speaker may be used in combination.
There is. Such a composite speaker is used because it is easy to match the sound sources in the
high range and the low range and can be used as a compact full thin / speaker. And, in the
composite speaker, the reproduction band limit in the low band is xf7-4x which is 1 in the
vibration 1 part ?) 0 support part in the husband of the vibration part such as the voice coil and
the diaphragm as in the normal cone speaker. Etc. It depends on the lowest resonance frequency
f, which is determined 1 ? ? ? ? ? ? ?. In order to lower the reproduction band limit of this
low range, the objective can be achieved by setting the lowest resonance frequency fO to F, or it
is possible to lower the output sound pressure level, and the above lowest 2-? ?) / no
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resonance frequency to There is a limit to lowering it, and when it is incorporated in a speaker
box, the lowest resonance frequency fo is further exhausted. Therefore, a composite speaker is
attached... A phase inversion duct is formed on the tundle plate, or a drone cone speaker or the
like is attached. However, in the case of using such a phase-reversal duct or a drone cone
speaker, not only the characteristics of the composite speaker for the purpose of compactness
and matching of the sound source are closed, but also it takes time and effort for the reverse
operation. turn into. Therefore, the present invention does not lose the characteristics of the
compound speaker, that is, the point of compacting and combining a plurality of speakers, the
characteristics of the high-pitched and the low-pitched sound source coincidence, and the oneunit conversion. In order to obtain a Yam-thick, it is characterized in that a pan-moving plate is
attached to the outer peripheral edge of the frame of the low-range reproduction speaker
combined with the high-range writing Gyouzan speaker.
3- Hereinafter, one embodiment of the present invention will be described with reference to the
drawings. FIG. 1 is a cross-sectional view showing a composite speaker according to the present
invention, 1 having a laminate of a yoke 3 having a center pole 2, a ring-shaped magnet 4 and a
ring-shaped top plate 5 in the same manner. A magnetic circuit portion of the low-range
reproduction speaker W configured, wherein the magnetic circuit portion 1 is formed in the
shape of a hollow circle, the air vent window 6 is formed on the periphery thereof, and a frame
made of aluminum alloy or the like It is connected. At an intermediate portion of the frame 7, an
active diaphragm 81 driven by the magnetic circuit 1 or an intermediate stay 9 also serving as an
aH-IJ link formed in a substantially cylindrical shape to be attached is provided. The active
imaging plate 8 is formed in a substantially conical shape, and the voice coil 10 is wound on the
side of the mesh portion, and the intermediate portion is suspended by the coil 11 supported by
the frame 7 by the damper 11. An egg yolk insert 12 is joined to the outer peripheral edge, and it
opens in the outward direction to the flange 7 9a of the intermediate stay 9 via the socket 12/12
so as to form a substantially cylindrical shape so as to serve as a sound insulation ring.
Attachment of the intermediate stay 9 of the above-mentioned frame 7 fixed with the Esso
presser 13 also has an air venting window 14 formed in the extended portion 7a further
extended from the portion, and the passive diaphragm 15 is attached The two edges 16 and 17
are joined to the inner and outer peripheral sides of the passive diaphragm 15 at a constant
interval. The passive diaphragm 15 has the inner peripheral side of the one edge 16 described
above. Through The frame 19 is attached to the outer edge of the frame 7 with the gasket 19 by
adhesively fixing the outer peripheral side of the frame t1 to the flange 7 formed on the outer
peripheral edge of the frame 7 through the other enon 17 It is attached to the outer periphery of
7. As described above, since the active diaphragm 8 and the diaphragm 15 of the low-range
speaker are attached to one frame T formed in a substantially conical shape, the diaphragms 8
and 15 are Coaxially attached. 5-Magnet comprising a yoke, a macnet, etc. so as to be
surrounded by the active diaphragm 8 in front of the magnetic circuit unit 1 of the low-frequency
reproduction speaker, that is, in the direction in which the active diaphragm 8 is disposed. Circuit
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portion 20, Hois coil 21. A vibration type system composed of a moving plate 22 and so on and a
horn type high frequency range reproduction speaker T having a horn 23 and an equalizer 24
are fixedly mounted via a member 26 in this manner-like this, a low frequency range When the
active imaging plate 8 of the low-range reproduction speaker W vibrates by combining the
speakers W and T for high-range reproduction and attaching the pan / bubble diaphragm 15,
radiation from the back direction of this diaphragm 8 is generated. The sonic waves pass through
the air venting window 6 of the frame r and pass through the air vent 14 of the extending
portion 7a to vibrate the pan / bulb diaphragm 15.
At this time, the plug / plate diaphragm 15 vibrates in a form opposite to the vibration of the
active diaphragm 8. Then, it is possible to lower the minimum resonance frequency fO6-i and
expand the low-range reproduction band limit in the same manner as adding a salt 9 of a drone
cone speaker to a drive speaker and a separate body on a baffle plate or attaching a phase
inversion duct. As described above, according to the present invention, the low frequency range
reproducing speaker W and the sifting area range reproducing speaker T are coaxially combined,
and the passive diaphragm 15 is formed on the outer peripheral edge of the frame 7 of the low
frequency range reproducing speaker W. Can be used to reduce the minimum resonance
frequency fa which is compacted, and to make it possible to use as a full-lin / loudspeaker with a
limited ? reproduction band limit. Further, since the speakers W and T and the passive
diaphragm 15 are coaxially combined, the sound sources in the low and high range are turned on
to the listener and become the same, and the sense of stability of the sound image is improved.
The sound pressure frequency characteristics as shown in FIG. 2 as a compact one-unit speaker.
That is, the lowest resonance frequency of the low range reproduction speaker W is lowered
from rol to fO, and the high range reproduction speaker T covers the range which can not be
sufficiently reproduced by the above-mentioned speaker W. The same reproduction band as that
of the arranged one can be obtained with a one-unit speaker. In the above embodiment, since the
intermediate stay 9 and the 7-input hinge 13 also play a role as a sound insulation ring, the
phase inversion operation of the sound wave radiated from the pad / bump diaphragm 8 or the
like is performed. It can be good.
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