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JPS54153224

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DESCRIPTION JPS54153224
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional
speaker, FIG. 2 is a cross-sectional view of a speaker according to an embodiment of the present
invention, and FIG. 3 is a cross-sectional view of another embodiment of the present invention. 4
is the top view. 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 Center ball, 4 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 ииииииии Voice coil, 8
иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Lever, 13 ... tweet cone.
DETAILED DESCRIPTION OF THE INVENTION The present invention provides a speaker which is
capable of vibrating the diaphragm largely with the small amplitude of the voice coil. First, a
conventional speaker will be described with reference to FIG. In FIG. 1, reference numeral 1
denotes a wedge-shaped yoke, and a hole is formed in the upper part of the yoke of this). ???
???? 9-<9> <1-2,-A columnar magnet fixed to the bottom of the above-mentioned yoke 1, 3 is
a center pole fixed to the upper part of the magnet 2. An annular magnetic gap 4 is formed
between the outer peripheral surface and the hole edge of the yaw 1. Reference numeral 5 is a
bobbin supported by Dan- 6, and a voice coil 7 is wound around the bobbin 5. The voice coil 7 is
disposed in the annular magnetic gap 4. The lower end of the cone 8 is fixed to the ground
portion of the bobbin 5 and the upper edge of the cone 8 is supported on the frame 1 o via the
edge 9. This spill force is a cone at a low frequency In order to make the whole 8 vibrate but not
generate distortion even at the large amplitude at this low frequency, it is necessary to use a
yoke having a thickness several times the winding width of the voice coil 7, and for this reason A
large magnet 2 is required, and there is a drawback that the size increases and the size increases.
Further, the conventional speaker shown in FIG. 1 is based on the low frequency of the low
frequency in which the bobbin 5 side of the cone 8 vibrates at a high frequency, that is, a socalled mechanical 2 way. There is a drawback that a high frequency sound is produced in the
place where the whole cone 8 vibrates, and there are many defects that intermodulation
distortion occurs 0 The present invention is to eliminate the above-mentioned conventional
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defects. An example will be described with reference to FIG. 2 with the same reference numerals
as in FIG. In FIG. 2, 11 is a support attached to the center pole 3 on the upper end, 12 is a lever
pivotally supported at one end on the support 11 and the other end of the lever is pivotally
supported on the cone 8 The bobbin 5 is pivotally supported on the middle support side of the
lever 12. In FIG. 2, when an audio signal is supplied to the voice coil 7, the bobbin 15 moves up
and down, the vibration of the bobbin 5 is transmitted to the co-78 through the lever 12, the
vibration of the bobbin 6 is expanded and the cone 8 It vibrates, and the cone 8 can be greatly
vibrated by the small amplitude of the bobbin 5, and the thickness of the yoke 1 constituting the
magnetic gap 4 can be reduced. The position of the support 11 may be outside the bobbin 5.
) Lee 21 T t 4-. FIGS. 3 and 4 show another embodiment of the present invention, which differs
from the above embodiment in that the tweeter cone 13 is fixed to the upper portion of the
bobbin 6 and, according to the present embodiment, the yaw is obtained. As well as being able to
reduce the thickness of the first layer, it is possible to remove intermodulation distortion as in
the prior art. The present invention is configured as described above, and according to the
present invention, since the small vibration of the bobbin is expanded to vibrate the cone,
generation of distortion can be prevented while thinning the thickness of the mill, When the
tweeter cone is attached to the bobbin separately, there is an advantage that intermodulation
distortion can be removed.
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