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Description 1, title of the invention
6, Detailed description of the invention. By the method, the voice carp JL / l- astered sby πa1
diaphragm can be made very lightweight, so it can be of excellent characteristics. However, only
the part that faces the air gap of the magnetic circuit is a Heuss coil? Because the film is very thin
and soft, the conductor area vibrates, but the film area without the conductor area vibrates to
almost no vibration, so that the radiation area is small. Sweet frequency 1! ! There is a
disadvantage that the reproduction at (company) is one point. The present invention has been
made in order to eliminate the above-mentioned drawbacks, and by forming the speaker
vibration plate in a wave shape, the film strength is increased, and the portion of the conductor
portion on the diaphragm is The non-portion is also vibrated in the same phase, and the increase
of the radiation area is considered, and the regeneration in the low frequency range 1 is made
one function. One embodiment of the present invention will be described below with reference to
the drawings. In FIG. 1, a single plate, a double-bowl, a six-piece voice coil 4t-molded film
diaphragm, a 5d spacer, and the above-mentioned film diaphragm 6 etching a conductive foil
stuck on a polymer film To form a voice quill 4. EndPage: 1 or diaphragm 6 Press forming at a
time Vacuum molding etc 1 / c, molded into a corrugated form from 1 / c, molded film
diaphragm is within the thickness range of the plate 1 conductor portion 4 within the magnetic
circuit gap shown in the figure Arrange to sink in. The strength of the non-integral part is higher
than that of the flat diaphragm, and the part without conductor also vibrates in almost the same
phase as the part with conductor and the Iktlfi product increases and the circumference is
increased. The lower limit of the wave number characteristic falls. , Also the conductor part sli! !
Since the maximum part Kfi [: '] of the magnetic flux density of the air circuit can be set, the
improvement of the efficiency of the speaker can also be improved simultaneously. Figure 2 '(FL),
(b) shows a schematic representation of a spiral-like Whistle coil pattern cast on a diaphragm in a
fill. Fig. 2 (h + partial enlarged view (part enclosed by (>) mark) ヲ boss. The diaphragm 11
'112μ thick sheet of aluminum foil is attached to the aluminum foil, the conductor width of
200μ, a gap of 100μ in the embodiment 8 same wave @ fKHz), the sound pressure on the
vertical axis Level (show tlB + eye j & u). Charcoal to meat 1 curve 轟 is the characteristic of the
spout force using a conventional flat diaphragm-! FIG. 1 is an IJ diagram, and 1 curve B shows a
diagram 11 of a characteristic surface of a loudspeaker with a wave-like diaphragm according to
the present invention. In this case, the bending iIB has a wave shape compared to the curve A, so
that the strength of the whole vibration plate is increased, so that the reproduction can be
performed with the same wave number 1 lower than the vibration of the metal plate hippy (curve
11iB). The sound pressure level is increased because the magnetic flux density portion of the
magnetic circuit is used.
As described above C C, according to the present invention, the speaker diaphragm is formed into
a wave shape to increase the strength of the film diaphragm, and the portion without the
conductor portion on the # plate is also vibrated in the same phase to Flat reproduction at low
frequency range 1 is i1 capable with increasing.
4. Brief description of the drawings Fig. 1 is a cross-sectional view of an essential part of an
embodiment of the speaker according to the present invention, Fig. 2ra), (b) only in the pattern
path of the voice coil of the same speaker as above. A large scale,--Figure 6 shows a frequency
characteristic curve diagram (m) of a loudspeaker having a conventional flat diaphragm and a
frequency characteristic curve diagram (B) of a loudspeaker having a waved diaphragm
according to the present invention. In the figure, 1 nibrate, 2: Bo I Shin 6: Hui I Rem 11 dlll
board, 4: Voice Koi r, 5: Sva Endo: 2