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JPS5482624

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DESCRIPTION JPS5482624
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a conventional dome
diaphragm, FIG. 2 is a sectional view showing an embodiment of a dome-shaped speaker
according to the present invention, and FIG. 3 is a dome diaphragm used for the same speaker 4
is a front view of the same half section, and FIG. 5 is a sound pressure frequency characteristic
comparison diagram of the conventional and inventive dome-shaped speakers. 3 ...... field portion,
12 ... ... damper, 13 ... ... voice coil, 14 ...... magnetic gap -15 ...... dome diaphragm , 16 · · · · · · · · ·
Dome portion, 17 · · · · · · · · · · · · · · · ·.
DETAILED DESCRIPTION OF THE INVENTION In the present invention, the ridges provided on
the rim of the dome portion of the dome diaphragm are provided with radial irregularities to
improve the strength of the dome diaphragm against deformation, and excellent sound It is an
object of the present invention to provide a domed speaker having pressure frequency
characteristics. Conventionally, as a dome-shaped speaker D dome diaphragm, there has been
used one using a metal foil such as an aluminum base metal foil or a titanium foil. An example
will be described with reference to FIG. 1. To do this, a gold-plated .cndot. Foil is used to provide
a dome portion 1 and a flat plate-shaped ridge 2 around the dome portion 1. Dome part 1 # 11 t17 ('2 is the number of grooves to prevent deformation of · r 2-0) A dome # cut plate with this
configuration is connected to a Heus coil 1, field M! When a dome-shaped force is incorporated
into a part, it is difficult to obtain a peak or dip due to resonance in the high region of the tonal
period mantissa characteristic, and it is difficult to obtain a flat characteristic. In this case, the
plate-like 鍔 2 has an optical intensity, and the 鍔 2 itself resonates to have an adverse effect as
described above. Also, as the dome diaphragm, one provided with a Mense / Shar Eno-ji has also
been developed and used, but this evening / Sensual Eno-J is to provide unevenness on the
contact side 1 of the dome and make it easy to vibrate. Because it is a structure of bt, the
function of reinforcement for deformation of the dome part can not be expected at all. The
present invention also eliminates the conventional drawbacks as described above. Hereinafter, an
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embodiment of the present invention will be described with reference to FIGS. Reference numeral
3 denotes a field section, and the field section 3 includes a center ball 4 and a rough plate 5. It is
constituted by a ring-shaped upper plate 7 which is also a ring-shaped "Mack-like" brush 37. A
baffle plate 8 is attached to the soil of the field section 3. The central through hole 9 of this baffle
plate 8! J) The peripheral edge of the dampers 12 is fixed to the step 10 provided in the
periphery via the ring 11, the voice coil 13 is coupled to the central part of the damper 12 and
the Heus coil 13 is the above-mentioned field The magnetic gap 14 of the part 3 is fitted without
eccentricity. A dome diaphragm 15 made of metal foil is coupled to an upper portion of the
whistle coil 13. The dome diaphragm 16 is configured by providing a dome portion 16 and a
ridge 18 having a radial unevenness 17 formed on the periphery of the dome portion 1 e. : The
same as the deformation of the dome portion 1e and the mechanical strength of the weir 18
itself are achieved by the weir 18 provided.
By this configuration, the crucible 18 itself does not resonate, and reinforcement to the
deformation of the dome portion i =, 1e is also measured, and the sound pressure frequency
characteristic, 't ,:' 4,- It can be flat and cheap. Next, a specific example is shown and
characteristics of the conventional example and the present invention are compared, and a
titanium foil of 0 thickness 20 μ is molded to have a dome portion of 25 mm in diameter and a
flat plate shaped ridge of 1 mm in width. The dome vibration and plate of the present invention
having a conventional dome diaphragm and a wedge having an unevenness between radial
directions at a pitch of 2 mm and a width of 1 mm make a plate, to which a Heus coil is coupled,
supported by a dan and par It was built in the field section as a domed loudspeaker. The sound
pressure frequency characteristics of these two speakers are as shown in FIG. The broken line in
FIG. 6 is a conventional dome-shaped speaker, and the figure shows the characteristics of the
dome-shaped speaker of the present invention. In the conventional dome-shaped speaker, the
peak and tiknob in the high region of 10 Kllz to 20 Kjlz are intense, and the high region limit
frequency fH is a low value, but the dome-shaped speaker of the present invention is flat overall
and high region The limit frequency fH is also extended, and it is clear that it is very clear. The
poisoning force of the present invention is simple, as in poison 5 or more, the stabilization of
characteristics is measured by the configuration, and deformation of the house can be prevented,
and it is generated due to deformation of the voice coil. Caps can also be prevented, and it is also
possible to further extend the high region, and it is a person of practical value that is extremely
excellent in the characteristic 9 quality.
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