JPS5513487

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DESCRIPTION JPS5513487
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of the left half of the
first embodiment, and FIG. 2 is a second embodiment of the present invention. FIG. 3 is a
sectional view of the left half of the third embodiment, and FIG. 4 is a sectional view of the fourth
embodiment. 1 ······ Cone diaphragm, 2 ······· Dustproof cap, 3 ······· Voice coil, 3a ······ Voice coil
bobbin, 4 ······· Damper, 5 ...... speaker frame, the front inner periphery of 5a ...... speaker frame, 6
...... ring, 7 ...... gap, 8 ...... Roruetsuji , 9: magnetic circuit, 10: magnetic gap, 11: waveform edge,
12: flat diaphragm, 13: · Baffle, 14 · · · · · · · · · ball baffle, 15 · · · · · · arc-shaped diaphragm. Figure
2 Figure 3
DETAILED DESCRIPTION OF THE INVENTION The present invention provides an improved
loudspeaker so as not to radiate out the sound generated from the edge of the loudspeaker
diaphragm so that the distortion is caused by the distortion of -t-tn harmonic distortion. The
purpose is to eliminate the radiation. In general, the speaker diaphragm is supported at two
points by a damper and an edge, and this speaker diaphragm is attached to the voice coil
attached to the speaker diaphragm so that the electric signal is transmitted to the front (1) It can
be vibrated correctly after t-1 ,,-, l "" ". One end of the damper is attached to the bottom of the
voice coil and the back of the vibration root of the speaker, and the other end is attached to the
speaker frame so that it does not appear in the vibration. On the other hand, the above edge is
applied in a ring shape to the outermost cylindrical portion of the speaker vibrating rod, and the
outer portion of the edge is bonded to the speaker frame δ. Therefore, this edge is exposed as it
is on the vibrating surface side. Since the edge is originally made of a flexible material, it vibrates
uniformly in low □□□ waves and does not generate distortion in sound quality, but it is high
while the edge itself causes resonance. When the wave number is reached, a disturbance is
generated on the sound quality, or a sieving wave distortion is generated to exert a bad cedar 4
that can be perceived in terms of hearing. This study provides a speaker that eliminates such
conventional problems, and each embodiment shown in the drawings will be described below. (2)
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Wa1 is an embodiment applied to a cone speaker, 1 is a cone diaphragm which is a diaphragm of
a speaker, 2 is a dustproof cap, 3 is a voice coil bobbin 3a on the inner peripheral portion of the
cone diaphragm l. Since the voice coil 4 attached is a dumbirch, one end of the sono is bonded as
the back of the voice coil bobbin 3a and the inside 11 of the cone diaphragm 1 and the other end
is bonded to the speaker frame 5, this damper 4 It does not appear on the vibrating surface. A
ring 6 is attached to the outer periphery of the cone diaphragm 1 and a slight gap 7 is provided
between the outer periphery of the ring 6 and the front inner station 5 a of the speaker frame 5.
Reference numeral 8 denotes a roll edge adhered 8 between the back surface of the outer
peripheral portion of the ring 6 and the back surface of the inner periphery 5a of the speaker
frame 50m, and the middle of the roll edge 8 and the center of the gap 7 are in line It is thin.
Reference numeral 9 denotes a magnetic circuit, and in the magnetic gap 10, as is well known,
the voice coil 3 is vibrated to be a partner δ.
Since the roll edge 8 is mounted as described above 1.3) τ, it does not appear on the vibrating
surface. Therefore, even if this roll edge 8 vibrates together with the cone diaphragm l, the sound
generated thereby is not radiated to the front side. Therefore, even if the roll edge 8 resonates
and emits an abnormal sound, it is the front iIl! There is no negative impact on hearing, as it can
not be emitted to l. FIG. 2 shows a second embodiment, which differs from the embodiment of
FIG. 1 in that a waveform edge 11 is used instead of the roll edge, and the other points are the
same as the embodiment of FIG. . FIG. 3 shows the third embodiment, which differs from the
embodiment of FIG. 1 in that a flat diaphragm 12 is used instead of the cone diaphragm. In the
case of this embodiment, in addition to the same effect as the practical example of FIG. 1 of not
emitting the resonance sound and the like generated from the edge to the front side, the ridges of
the surface of the diaphragm 12 and the baffle 13 are continuously connected. Since the speaker
is flat and has no unevenness with respect to the flat surface, there is also an effect of flattening
the sound If characteristics <4) without the sound diffraction effect of the edge 8. FIG. 4 shows a
fourth embodiment of the present invention, which is a speaker suitable for being attached to the
ball baffle 14. The difference from the third embodiment is that the flat diaphragm is used
instead of the diaphragm. As in the third embodiment, without disturbing the sound pressure
characteristic due to the diffraction effect of the sound and smoothing the sound pressure
characteristic. That is, there is an effect of flattening. In the first to fourth embodiments, the
diaphragm is vibrated back and forth by causing the center of the edge and the center of the gap
7 to substantially coincide with each other, as shown by the center of each figure in the
drawings. Also, the volume of the air chamber surrounded by the edge, the speaker frame and
the diaphragm hardly fluctuates, so that the air does not enter or leave through the gap 7 and the
sound of air leaking (a sound such as a shoe shoe) Can be eliminated. As described above, this
device arranges the above-mentioned diaphragm 15 with a slight gap between the outer
periphery of the diaphragm and the speaker frame, and one end of the diaphragm is the outer
periphery of the diaphragm at the back of this gap. In the back of the speaker, the other end is
attached to the back of the speaker frame, and the center of the edge and the center of the gap
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are substantially the same. By blocking the sound from the front and releasing the center support
of the vibration system and by ensuring that the edge hardly appears on the front side of the
diaphragm, the edge resonates and an abnormal sound is generated. Even in this case, since the
abnormal sound is not radiated to the front side of the diaphragm, there is no adverse effect on
hearing.
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