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JPS5425828

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Notice
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 JPS5425828
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an example of a
conventional speaker unit, and FIG. 2 is a sectional view showing an embodiment of the present
invention. 1 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 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 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 ..... Center cap, 101 ..... Sound absorbing material.
DETAILED DESCRIPTION OF THE INVENTION The present discussion relates to soot-caninit of
movinda oil levels, and more particularly to the modification of the degradation of sound quality
by the center cap of the cone. FIG. 1 is a sectional view showing an example of a conventional
speaker unit. In the figure, 1 is a through hole at the center, 'r; j-> magnet j in the shape of a
magnet, 2 is a through hole of the magnet 1 It is a tunnel 7-7 disposed inside to form a magnetic
circuit. Then, 3 is a few seconds freely retractable to the outer periphery of the center mail 10,
and 9 is a coil 1b wound around the bin 3a, but it is is-yl. Further, 4 is a tiger 7'ii- which is upper
1ii K * of the magnet 1 and which faces the coil coil 3 with a predetermined magnetic gap. In
addition, 5 is a conical cone in which the center netter portion is held by the above-mentioned
bin 3 & the outer periphery is held by the frame 6, 1 is a men ? between the above-mentioned
bin 3 & and the base of the frame 6. Reference numeral 8 denotes a center cap provided at the
center of the cone 6 for dust prevention and the like. Thus, in this type of speaker, the magnetic
gear knob is narrowed so as to obtain extremely good efficiency and characteristics, so a sealed
space is provided between the center character f8 and the end face of the 1-rubys 2. (Shown) is
formed. For this reason, the air pressure in the above space is largely carbonized by the vibration
of the chair coil 3, causing a problem that the signal given by the sensor j can not be faithfully
reproduced. In general, the coil 3b of the bin 3a and the dan A through hole is formed in a side
wall (shown by B) between the mother 7 and the center (1 shown by C) of the center character f8
so as to release the pressure in the space. However, when the through hole is provided on the
side wall of the bottle 3a, there is a problem that the strength to the bottle 3 is reduced and
01-05-2019
1
deformation, 1s, etc. are easily generated. On the other hand, when a through hole is provided at
the center of the center cap 8, the sound on the back side of the center cap 8 comes out to the
front side, causing a sense of opposite phase and causing a problem of fidelity reproduction. That
is, the sound pressure of the reverse phase of the back side of the center cap 8 is reflected by the
tip end face of the pole piece 2, and especially when the cross section of the center character f8
is arc-shaped, it is concentrated in the center and rounded off in the front side. There was a turtle
while she was wearing and deteriorating. In addition, a sound absorbing material such as
lightweight felt or glass wool with a small mass compared to the weight of the vibration system
such as light weight wool or glass wool is inserted into the upper end opening of the chair coil,
for air flow resistance passing inside the sound absorbing material. Some are designed to prevent
damping of the diaphragm and tube resonance that occurs in the coil front bin. In the meanwhile,
such a thing has a problem that the characteristic is damaged because it adds weight to the
vibration system.
The present invention has been made in view of the above circumstances, and it is an object of
the present invention to provide a speaker unit which can reproduce a signal faithfully and does
not cause a sense of opposite phase. Hereinafter, an embodiment of the present invention will be
described with reference to a cross-sectional view shown in FIG. 2 with the same reference
numerals as in FIG. In the figure, reference numeral 107 denotes a center cap having a through
hole 101m at its center, and reference numeral 102 denotes a sound absorbing material attached
to the front end surface of the I-piece 2. In this way, the space surrounded by the center
character f101 and the front end face of the I-lepiece 2 communicates with the through hole J
(IJIIK to the outside, and the discoil can respond faithfully to the given signal. . In addition, the
fluctuation of the negative phase sound pressure on the back side of the center cap 1a) is
collected by the sound absorbing material 102, and the negative phase sound pressure is emitted
on the front side, that is, the front surface of the cone 1 , And can reproduce the signal given to
the chair coil 1 faithfully, it is possible to obtain a self-preferred characteristic. As described
above in detail, the present invention adds a sound absorbing material to the end face of the
single piece to absorb the sound pressure of the space surrounded by the end face of the pole
piece and the center cap at the center of the cone. Thus, it is possible to provide a speaker unit
capable of performing high-fidelity reproduction without any sense of opposition.
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