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JPH0213100

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DESCRIPTION JPH0213100
[0001]
TECHNICAL FIELD The present invention relates to a speaker used for various audio devices.
Conventional Technology A conventional speaker is configured as shown in FIG. That is, the ringshaped magnet 3 and the ring-shaped upper plate 4 are stacked on the plate 2 having the entire
center pole 1 to form a magnetic circuit 6, and the frame 6 is coupled to the upper surface of the
upper plate 4 of the magnetic circuit 6 The edge 9 of the diaphragm 8 is bonded to the
peripheral edge of the frame 6 together with the gasket 7 by bonding or the like, the voice coil
10i is coupled to the center of the diaphragm 8 and the middle part of the voice coil 10 is held
by the damper 11 The coil portion 10 & 'i of the voice coil 10 is inserted without eccentricity into
the magnetic gap 12 of the magnetic circuit 6 and the dust cap 13 is attached to the central
portion of the upper surface of the diaphragm 8. SUMMARY OF THE INVENTION In the speaker
having the above configuration, formation of the magnetic gap 12 with high precision and the
diaphragm 8 for moving the voice coil 10 up and down in order to extract magnetic energy
efficiently. ダンパー11. The configuration of the drive system such as the voice coil 10 is a
point. If the magnetic gap 12 is too narrow, it will be rubbed against the upper plate 4 or the
center pole 1 during movement of the voice coil 1o to generate an abnormal sound, and if the
magnetic gap 12 is too thick, the magnet will be a magnet The magnetic energy of 3 can not be
used effectively and it becomes inefficient. In addition, if the roundness of the voice coil 10 is not
sufficient, gap scraping will occur entirely, and if the damper 11 also has poor linearity in its
vertical movement, it will cause gap scraping in the voice coil 10 and cause abnormal noise Pay
attention to the design, such as generation and breakage of the voice coil 10, and the like, and no
assembly error is allowed even in 造 construction, resulting in poor productivity. Means for
Solving the Problems In order to solve the above problems, according to the present invention, a
coil is disposed around a magnet or a laminate of a magnet and a magnetic body, and one end
face of the magnet or the laminate of the magnet and the magnetic body A plate made of super-
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HE conductive material supported by all edges and dampers is arranged at a fixed distance.
Operation With the above configuration, there is no concern about the occurrence of abnormal
noise due to gear grinding, high precision design and manufacture are not required, and the
configuration is extremely easy to produce. Embodiments of the present invention will be
described below with reference to FIGS. 1 and 2 of the accompanying drawings.
First, the first embodiment shown in FIG. 1 will be described. Reference numeral 14 denotes a
frame made of a molded article such as an iron plate having window holes 16 at the periphery
open and having the whole bottom surface or synthetic resin, and a cylindrical magnet 16 such
as Alnico is attached to the center of the inner bottom of the frame 14 A coil 17 is wound around
the magnet 16. Further, an edge 18 is coupled to the peripheral portion of the frame 140. The
edge 18 is made of yttrium barium copper (YBa, Cu, O, -x), dysprosium barium, erbium barium
copper, holmium barium copper, etc. The disks 19 of the superconducting material are joined
together, and the disks 19 are disposed in parallel with the upper end face of the magnet 16 at a
constant interval. With such a configuration, ultra 1. [The disc 19 made of a conductive
substance is always floating in the air with respect to the magnet 16 by the Meissner effect, and
is supported by the edge 18 so as not to be displaced in the horizontal direction. When an
electric current is supplied to the coil 17, the magnetic force of the magnet 16 is strong and
weak, and the one disk 19 moves up and down to generate a sound wave by the vertical
movement of the disk 19. A second embodiment will now be described with reference to FIG. The
difference from the embodiment shown in FIG. 1 is that the step portion 141L is provided at the
middle portion of the frame 14 and is held by the outer peripheral edge Mf of the first disc 19
and held by the outer rim 20. The central portion of the diaphragm 21 in the form of a cone is
joined to the portion corresponding to the node of the primary resonance on the upper surface of
the disc 19 and the edge portion 22 of the peripheral portion of the diaphragm 21 is framed. The
other parts have the same configuration as that of the other. In this embodiment, the disc 19 can
be made smaller, and a large output can be obtained by the diaphragm 21. In each of the above
embodiments, although the disk 19 is described as a single disk 19, it may be a square plate, an
elliptical plate or a non-circular plate, and a pole piece made of iron or the like may be laminated
on the magnet instead of the magnet 160. You may use what was. Effects of the Invention As
described above, since the superconducting speaker of the present invention is configured, it can
be manufactured without highly precise dimensional restrictions and assembly error restrictions,
and a large improvement in productivity can be achieved while achieving downsizing and
thinning. It can also be a dog of industrial value.
[0002]
Brief description of the drawings
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[0003]
FIG. 1 is a partially cutaway perspective view showing one embodiment of a superconducting
speaker according to the present invention, FIG. 2 is a partially cutaway perspective view of
another embodiment, and FIG. 3 is a half sectional view of a conventional speaker.
14 · · · · Frame + 16 · · · · · · Magnets, · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · -Damper, 21 .....
Vibration plate. Name of agent Attorney Nakao Toshio and one other person Figure Fig. 1 // 7t
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