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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial central longitudinal sectional view
showing an embodiment of a speaker according to the present invention, FIG. 2 is a plan view of
a diaphragm in the same, and FIG. 3 is a conventional skier. FIG. 4 is a characteristic diagram of
the speaker according to the present invention. 6
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Vent part Fig. 1-59-Jpn. 2nd (rK'L
(P3rd q q de (1? ░ C 3 ? 0 deposit {010? ░ C 20CX) 0 1 60 1 real open 51-31525 (3) Fig. 1
1 61 1
DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a speaker Km
using a diaphragm having an edge having a part of KM%. A conventional dome-shaped
diaphragm, which is to be moved as a rigid body, and a soft, moving, i-edge part are integrally
formed of an aluminum alloy or the like, so that a diaphragm of one diaphragm is straight. Is
worse. In the edge part, the characteristic was deteriorated due to the radiation of the sound
from the vaginal edge part. Therefore, there are nine cases in which one flexible material
different from the material of the dome portion is used at the edge portion. In this diaphragm,
although it was possible to improve the amplitude t at a certain degree, it was not possible to
sufficiently improve the characteristics by the radiation of the sound from the edge portion (FIG.
3). On the other hand, there are nine products in which a dome portion and an edge portion are
integrally molded and holes are made in the edge portion to improve the characteristics by
radiation. However, in this case, as described above, it was not possible to improve the straight
line linearity. The present invention is intimidated in view of the point on the board, and its
purpose is to provide a speaker which improves the amplitude linearity and stops the radiation of
the sound from the edge. Next, an embodiment of the present invention will be described with
reference to the drawings. il + is pole, (2) is plate, (3I is voice-ilpobin, (4) is voice coil, (15 + ha
diaphragm pad, above is a known structure) o (6) is a diaphragm, aluminum alloy Material, such
as duralumin, made of a light alloy such as light alloy, and a breathable material such as open-
cell foam made of expanded polystyrene equivalent to 2 to 5? at the time of press molding,
escape 4 to 12 molds per degree and vent ( 6h) and an edge portion formed. The above dome
part ? and the above are chair coil bobbins (3: edge part! Bonded with II K II adhesive. Thus, the
edge portion of the above-described configuration is a flexible crucible material, so that the
amplitude linearity is excellent upon vibration, and by having the statement ventilation portion
(6h), the edge portion and the plate (2) The resonance in the air chamber ff1 formed between
them is alleviated, so that the radiation of sound from the edge part is prevented (fourth also).
The present invention has flexibility as the open-celled polystyrene foam as described above (and
when the end portion is made of a material having breathability, it forms a large number of vents
during busy press operation) In addition to improving amplitude linearity and preventing air
chamber resonance, it is possible to obtain wide-band and flat characteristics such that harmonic
distortion can be reduced and clear transient response can be obtained. It is possessed.
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