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DESCRIPTION JPS5743689

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DESCRIPTION JPS5743689
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional fullarea dynamic electrodynamic speaker, FIG. 2 is a cross-sectional view of the full-area dynamic
electrodynamic speaker according to the present invention, and FIG. It is the whole perspective
view which notched one part of the speaker. 1 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и pole yoke, 5 и и и и и vibration coil ииииSpacer.
DETAILED DESCRIPTION OF THE INVENTION In the present invention, a so-called ribbon-type
loudspeaker is called a ribbon-type loudspeaker, which comprises a magnetic circuit consisting of
a magnet, a plate and a ball yoke and a vibrating coil serving both as a voice coil and a
diaphragm. It relates to the improvement of nupika. FIG. 1 is a cross-sectional view of a
conventional, full-surface dynamic electrodynamic speaker of this type, in which A is an external
magnetic magnetic circuit L bow / n y (at Mcnets) B, 7 'rate C1 It comprises a ball yoke D, and E
is a magnetic gap. F is a ribbon-shaped vibrating coil which also serves as a voice coil and a
diaphragm, which is mounted on the plate C from the frame G and disposed between the
magnetic gear tubes E. In the magnetic circuit A of the above conventional example, a gauge is
used to position the magnet B and the plate C with respect to the ball yoke D in the magnetic
circuit A of the conventional example. Since it is carried out, in particular, when a square shaped
magnet) B tube is used, it is easy to cause deviation in the amount of particles applied. Also, when
attaching the magnet B and the plate C as a back chamber H't guide, acoustic treatment in the
pack chamber H is required, and depending on the accuracy of parts, the dimensional accuracy
of the magnetic gear tube E etc. can not be maintained and the shape is large. Easy to
Furthermore, although it is conceivable to position the magnet B1 plate C by the sound absorbing
material processing, there is a disadvantage that the sound absorbing material I can not be a
member for positioning because of the flexible body. Therefore, in order to solve the abovementioned drawbacks, the present invention aims to solve the above-mentioned drawbacks by
using a nonmagnetic meshing paper between the ball yoke of the magnetic circuit and the
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magnet and the plate. It is an object of the present invention to provide a full area dynamic
electrodynamic speaker having a magnetic circuit which enjoys the dimensional accuracy by the
nuclear spacer, and the% assembly simply by totally interposing one-character joining.
Hereinafter, the present invention will be described based on an embodiment of the drawings.
FIG. 2 is a cross-sectional view of a full-area dynamic electrodynamic speaker according to the
present invention, and FIG. 3 is a perspective view in which a part of the speaker is cut away. is
there. In the figure, it is a ltf external magnet type magnetic circuit, which is composed of a
magnet 2, a plate 3 and a ball yoke 4. The vibrating coil 5 also serves as a 5 Fi voice coil and a
diaphragm. The vibrating coil 5 is sandwiched and fixed between the plate 3 and the frame 6 and
distributed between the magnetic gaps 7. Reference numeral 8 denotes a hard surface spacer
made of a nonmagnetic material such as aluminum or synthetic resin, and this spacer 8 is formed
in advance so as to be interposed between the ball yoke 4 of the magnetic circuit 1 and the plate
3 and magnet c) 2 From the both ends of the molded spacer 80, square support portions 8a and
8b having a predetermined thickness of metal are provided in a protruding manner.
9 & and 9b are frame portions formed on the outer periphery of the support portions 8m and 8b,
respectively. Therefore, in order to assemble the above components, first, after the spacer ? is
fitted and fixed to the pole yoke 4 and then the magnet 2 is fitted to the spacer 8, the inner
peripheral surface of the magnet 2 is the lower end of the spacer 8 It abuts on the outer
peripheral surface of the flange portion 8C protruding on the outer periphery, and is positioned
with respect to the ball yoke 4. Next, when the plate 3 is fitted to the spacer 8, the plate 3 is
positioned relative to the pole yoke 4 by the fact that the inner peripheral surface thereof abuts
on the upper outer peripheral surface of the spacer 8, thus the magnetic circuit 1 Is assembled.
At this time, the upper surfaces of the spacer 8 and the support portion 8a 8b are flush with the
upper surfaces of the ball yoke 4 and the plate 3. Next, the vibration coil 5 is placed on the plate
3 through the spacer 10, and the outer circumferences of the both ends of the vibration coil 5
are positioned on the frame 9m, If fixed on the diaphragm 3, it will be a complete dynamic
electrodynamic speaker. The present invention relates to a full area dynamic electrodynamic
speaker comprising a magnetic circuit 1 consisting of a magnet 2, a plate 3 and a ball yoke 4 and
a voice coil and a vibrating plate 5 and a t vibration coil 5 as on paper. A spacer 8 of
nonmagnetic material is interposed between the magnetic circuit 10 ball yoke 4 and the magnet
2 and the plate 3, and this space Since the positions of the magnet 2, the plate 3 and the
vibrating coil 5 with respect to the ball yoke 4 are restricted by 8, the dimensional accuracy of
the magnetic circuit 10 can be improved without using a gauge, and the assembly can be
simplified. In addition, the magnets 2 and the plates 3. Since the acoustic processing of the cavity
formed by the ball yoke 4 is not required, the number of parts can be reduced, and a pack
chamberer for preventing the influence from other speakers is not required when attaching to
the cabinet. Furthermore, since the present invention is a full-area dynamic electrodynamic
speaker 0 and the vibration of the vibrating coil 5 is small, the magnetic gap 7 is embedded
approximately to the upper surface of the plate 3, ie, the pole yoke 4 by the spacer 8. However,
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there are problems in the operation of the vibrating coil 5. Therefore, supporting portions 8m
and 8b having the frame portions 9m and 9b can be protruded from both ends of the spacer 8,
and the side portions of the imaging coil 5 placed on the plate 3 are the supporting portions 8m
and 8b. The position of the vibration coil 5 can be regulated by abutting on the frame 9m + 9b.
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