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DESCRIPTION JPS5642086

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DESCRIPTION JPS5642086
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of the present invention,
FIG. 2 is a plan view, and FIG. 3 is a bottom view. 1 is a reinforcing plate, 2 is a passive
diaphragm, 3 is a frame, 4 is an outer edge, 5 is a hole, 6 is a cone paper, 7 is a voice coil, 8 is a
plate, 9 is a magnet, 10 is a center pole, 11 is an enlargement Department.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker in
which a plurality of arc-shaped passive diaphragms are juxtaposed on the outer periphery of a
bass speaker. Conventionally, in a speaker system incorporating a harassive diaphragm, since it
is divided into two parts, a bass speaker unit and a tough diaphragm speaker, it is necessary to
increase the area of the baffle plate and the capacity of the speaker box. The In the present
invention, as shown in the embodiments of FIGS. 1, 2 and 3, as shown in the lower part of FIG. 3,
7 '' '-eight-8' '-F9' "-pole 10 of magnetic circuit composed of magnetic circuit pole A magnetic gap
is formed between the upper outer surface of the El 210 and the inner surface of the plate 8 and
the bottom of the truncated cone 3 is connected to the top of the 6 ? 1 ии plate 8 and the outer
line 4 of the frame 8 is A plurality of circular arc-shaped holes 5 are made in the enlarged
portion 11 and the voice coil 7 is placed at the center of the magnetic gap, and the ring shape is
formed in the frusto-conical cone paper 6 which hangs down the voice coil 7 at the center. The
outer edge of the edge is attached to the inner periphery of the outer edge portion 4. The
plurality of arc-shaped passive diaphragms 2 are attached to each of the plurality of arc-shaped
holes 5, and the arc-shaped passive diaphragm 2 is attached. The arc-shaped reinforcing plate 1
is attached to the center upper surface of the Which is a speaker to form on the edge of with a
corrugation. The reinforcing plate 1 is a circular arc plate made of a light metal such as
aluminum or a synthetic resin or rubber, and the passive diaphragm 2 is formed of a flexible
synthetic resin or rubber. 878 "1 Beoj 7681 ░ 1607 Pa: A plurality of arc-shaped passive
diaphragms 2 vibrate in resonance with the air vibration generated by the vibration of the
driving cone 6 to expand the bass range. According to the present invention, the area of the
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baffle plate can be small, the number of parts is small, the material cost can be small, the number
of assembling steps can be shortened, and the passive diaphragm is around the drive cone paper,
so the sound source is It becomes coaxial and has good resonance efficiency. Since the passive
diaphragm is divided into plural pieces, it is an excellent invention which makes it easy to control
the low range characteristic.
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