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JPS572784

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complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPS572784
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of the speaker of the
present invention. 1 is a diaphragm, 2 is an opposing plate, 3.4 is a voice coil, 7 is a yoke, 8 is a
magnet, 9 is a plate, and 10 is a protrusion.
DETAILED DESCRIPTION OF THE INVENTION The present invention has a structure in which a
disk-like counter plate and an annular diaphragm for driving the inner and outer peripheries face
each other to make it completely omnidirectional with respect to the horizontal direction and to
be lighted vertically. The present invention also relates to an omnidirectional speaker that
exhibits good directivity to emergency response g3 and d2. In the present invention, as shown in
FIG. 1, an annular magnet 8 is attached to four parts of a planar yoke 7 having a cylindrical
projecting portion IO formed at the center, and an annular plate 9 is attached to the upper
surface of the L1 magnet 8 to form a magnetic circuit. Configure. Attach the disc-shaped counter
plate 2 with a cross-sectionally H-shaped cross section on the upper surface of the protrusion 10,
place the annular diaphragm 1 opposite to the toe of the counter plate 2, 10 Attached to the
upper end of the voice coil 3 disposed at the center of the inner magnetic cap formed by the
outer wall, and the outer peripheral edge of the diaphragm 1 is disposed at the center of the
outer magnetic cap formed by the outer wall of the plate 9 and the inner circumferential wall of
the yoke 7 Stick the voice coil 4 on the top 31 of the voice coil 4 and stick the outer peripheral
end of the damper 4 and the inner peripheral end of the Tano · ζ 6 on the upper surface of the
play 19. It is an omnidirectional speaker that holds four. Since the present invention has a
structure as shown in F, K is radiated in the horizontal direction from the space between the
opposing plate and the diaphragm 3 and becomes a highly efficient nondirectional speaker. By
making the gap between the diaphragm and the opposing plate small also in the vertical
direction, very good directivity is exhibited. The upward sound pressure rises above the voice coil
two-point drive.
03-05-2019
1
03-05-2019
2
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