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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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The present invention supports a speaker unit, more specifically, a diaphragm fixed to a voice
coil via a damper fixed at one end to a frame, and generates a sound by vibrating the diaphragm
according to the current flowing through the voice coil. It is about a unit. Conventionally, in a
speaker of such a configuration, the damper is fixed to the frame at one end and to the voice coil
at the other end, and the diaphragm is supported by the frame via the damper (1) Because of this,
the frequency characteristics are greatly influenced by the performance of the damper, and
various proposals have been made for its improvement. However, conventionally, since the
damper was composed of a single piece of a wave-shaped member, for example, when the
amplitude is large, a good shock absorbing characteristic can not be obtained, which adversely
affects the acoustic characteristic. Accordingly, the present invention is made to solve such
conventional drawbacks, and it is an object of the present invention to provide a speaker unit
that can obtain good acoustic characteristics over a wide range of frequencies. According to the
present invention, in order to achieve this object, a configuration is adopted in which a plurality
of dampers are stacked so that the layer becomes thicker on the frame side and the voice coil
side tee layer becomes thinner. The present invention will now be described in detail according
to the embodiments shown in the drawings. In FIG. 1, reference numeral 1 denotes a center pole,
and a voice coil 2 is coaxially disposed in the center pole 1 and a gear (9) tab in the center pole 1
and the yoke 3. The voice coil 2 is fixed to the diaphragm 40 cylindrical portion 4a, and a
damper 6 of which one end is supported by the frame 5 is fixed to the cylindrical portion 4a. The
peripheral edge of the diaphragm 4 is fixed to the frame through the gasket 8 and the cylindrical
portion 4a of the diaphragm is connected through the center gap 7. The 1 ° damper 6 is shown
in detail in FIG. As shown in the figure, the number of stacked layers is large on the frame 5 side,
the number of stacked layers is small on the voice coil side, and the portion fixed by the
cylindrical portion 4a consists of a small number of dampers. . In the speaker unit having such a
configuration, the vibration signal current flows thickly, and when the amplitude is large, the
restoring force on the frame 5 side is strongly reflected, and it is striking that the damper or the
diaphragm hits the bottom Good acoustic characteristics are obtained. Also, on the voice coil side,
the mass of the damper is small and the loss on the quality is large, so the resonance level is
extremely low, and it is absorbed by the mass that increases as it moves to the frame side, so
there is no resonance and no reflection on the frame side can do.
Brief description of the drawings
FIG. 1 is a cross-sectional view showing the configuration of the speaker unit of the present
invention, and FIG. 2 is a cross-sectional view showing the detailed structure of the damper.
1 · · · Center pole 2 · · Voice coil 3 · · · Yoke 4 · · · diaphragm 5 · · · frame 6 · · · · · · · half gap · · ·
center gap 8 · · · patent applicants Wako Toyo Electronics Co., Ltd. Agent Patent Attorney Takashi
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