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DESCRIPTION JPS5075328

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DESCRIPTION JPS5075328
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an eight-face view of the dome-shaped speaker
according to the present invention, and FIG. 2 is a force-strain diagram of the vibrating part. иии
Dome shape diaphragm, 3 и и и и и и и Voice coil, 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 и и и и и 2 is
there. Li 1 figure-65-real opening 50-75328 (2) ? 2-66-
DETAILED DESCRIPTION OF THE INVENTION The invention relates to the improvement of a
dome shaped speaker. In the conventional dome-shaped speaker, only the single damper fixed to
the outer periphery of the dome-shaped diaphragm or the voice coil is used to support the
vibrating portion that vibrates by fixing the voice coil to the peripheral portion of the domeshaped diaphragm. ing. For this reason, when the vibrating portion vibrates back and forth, the
compliance before and after (1) differs depending on the difference in the shape of the damper
before and after, and the distortion factor generated due to the nonlinearity of the damper
increases. . In addition, there is a drawback that the rolling phenomenon occurs because the
supporting point of the vibrating part is one point. The present invention seeks to provide a
dome-shaped speaker in which such drawbacks are ameliorated. An embodiment of the present
invention will be described below with reference to the drawings. In FIG. 1, (3) is a voice coil
formed in a cylindrical shape, and (2) is a dome-shaped diaphragm fixed to the end of the voice
coil with its peripheral portion and bulging out to the front of the speaker , (1) is a vibrating
portion constituted by the dome-shaped diaphragm and the voice coil, and (4) is annularly
formed, and the inner peripheral edge is fixed to the voice coil so as to be a convex portion in the
front direction of the speaker And the damper (5) is formed in an annular shape and has a
convex portion toward the rear of the speaker, that is, the outer periphery is voiced so as to be
symmetrical with the damper. The second damper is fixed to the coil, the inner peripheral edge is
fixed to the speaker center (2) -le (l), and is fixed to the mounting bracket, (7) is the plate fixed to
the frame, t81 is this Played permanent magnet , (9) is a di-insertion York. Next, the operation
and action of the dome-shaped speaker configured as described above will be described. When
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there is an input to the voice coil (3) and the vibrating section (1) composed of the voice coil, the
dome-shaped diaphragm (2) and K vibrates back and forth of the speaker, the vibrating section is
the damper (4) and the second Vibrate with the damper (5) as the fulcrum. At this time, since the
convex part of the damper (4) and the convex part of the second damper (5) are attached in a
symmetrical shape, the compliance to the vibration in front of and behind the speaker is the
same and the linearity of the vibration is improved. The relationship between a part of the force
and the displacement is compared with the conventional one shown by the dotted line in FIG. 2,
and as shown by the solid line, it is possible to remove the asymmetric distortion particularly in
the part where the wide range of the bass region is large. In addition, the rolling current (3)
elephant is raised even if the photographing part supported at two points of the damper (4) and
the second damper (5) vibrates back and forth in the photographing part (1) Excuse me for being
a book.
As described above, according to the present invention, the outer edge of the annular second
damper +51 having a symmetrical shape with the damper (4) is fixed to the inner edge of the
voice film (3), and the vibrating portion (1) is The compliance of the front and back of the
speaker is the same and the linearity is improved by supporting it with 4), and the asymmetrical
distortion can be removed especially in the part where the amplitude of the bass region is large,
and the dome which does not generate the rolling phenomenon I was able to form a speaker.
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