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DESCRIPTION JPS56114199

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DESCRIPTION JPS56114199
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a general speaker,
FIG. 2 is a top view showing an embodiment of a flat damper used in the speaker of the present
invention, and FIG. The figure is a top view of the flexible material constituting the damper, Fig. 5
is a top view showing a flat damper of another embodiment, Fig. 6 is a side view thereof, and Fig.
7 is a flexible material constituting the damper. It is a top view. , 5 · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · voice coil, 10 · · · flat damper, 11 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · magnetic gap, 13 · · · arc shaped l-114, 15 · · · · · · · · · · · · · · · · · · · · · · Flexible material. Fig. 71 =
= =--one "/ 6 'Fig. 6-147 = = = = == = totste
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker using a
flat damper; q q 9 '12 This modern parr is modified to give the same right resonance of the
datsubar itself which is caused by the edology and flexibility of the substrate. In other words, it
reduces Q and lowers the adverse effect on the sweat pressure frequency characteristics of the
horse main band as a speaker. In general, the speaker is configured as shown in FIG. That is, the
frame 6 is coupled to a magnetic circuit 5 constituted by a plate 2 having a center pole 1, a
magnet 3 and a magnet 3 and a ring-shaped upper plate 4 as well, and a gasket is provided on
the periphery of the frame 6 The peripheral portion of the vibration plate 8 is fixed by adhesion
together with 7, the voice coil 9 is coupled to the central portion of the diaphragm 8, and the
middle portion of the voice coil 9 is fixed to the step 6a of the frame 6 The lower part of the
voice coil 9 is held in the central portion of the flat damper 10 and inserted into the magnetic
gap 11 of the magnetic circuit 5 without eccentricity, and the dust cap 12 is attached to the
central H surface of the diaphragm 8 The Conventionally, the modern par 10 is made of only
three base materials, and the base is manufactured by punching a phenol laminate. Since this
phenol laminate has a relatively small internal loss r, assuming that the weight M is constant, the
resonance sharpness Q of the wedge damper ωM-10 exhibits a relatively large value as indicated
by Q = □. Therefore, there are peaks and dips due to this resonance in the sound pressure
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frequency characteristics of the speaker, so that the sound quality contains a lot of distortion,
making it difficult to reproduce the original sound. The present invention eliminates the abovementioned conventional drawbacks. An embodiment of the present invention will be described
below with reference to FIGS. In addition, since the structure of the whole speaker is the same as
that of what is shown in FIG. 1, only the specific structure of the flat damper 10 is demonstrated
here. In the embodiment shown in FIGS. 2 to 4, a circle of the same pattern is formed between
the disk-like substrates 14, 15 in which a thin phenol laminate is punched to form a large
number of arc-shaped slits 13. A disk-shaped flexible material 16 having a large mechanical
internal loss, such as synthetic rubber having the arc-shaped slit 13 formed therein, is encased
and fixed by bonding or the like to form a flat damper 10. About the manufacture, the raw
material which stuck the phenol laminated board on both surfaces of the rubber sheet is stamped
and formed circular arc-like slit 13 while forming it in disk shape. 6-7, the base material 14 ° 15
is the same as the embodiment described in -L, and the arc-shaped slit 13 is not formed in the
flexible material 16, and the modern pattern of the embodiment described above Compared to
10, dust in the air does not pass through the modern par 10 and enter the magnetic gap 11.
As apparent, the speaker of the present invention is not constructed, and the sharpness of
resonance as a flat danoper can be alleviated by the flexible material to lower Q and reduce
distortion of sound pressure frequency characteristics as the speaker. It has the advantage of
being able to reproduce faithfully to the original sound and has a great practical value. 5
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