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DESCRIPTION JPS4913019

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DESCRIPTION JPS4913019
■ Speaker 0% Akira 45-79z2q Yu application Akira 45 (1970) January 29 · 0 inventor Tadashi
Sawada-出 願 applicant Yale Acoustic Co., Ltd. [present] agent patent attorney Minoru Yasumoto
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an embodiment of a
speaker according to the present invention, FIG. 2 is a partial sectional view showing another
configuration example of a voice coil terminal portion, and FIG. 3 is a rear view It is.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of a speaker in which a coil and a cone are held in a floating state without identifying a cone edge
to make it completely free-edge and not providing a voice coil damper. The inventor of the
present invention previously proposed an electrokinetic transformer in which one electric wire
having a magnetic coating layer on the outer periphery was used to form a voice coil, which was
disposed with floating state in a magnetic pole gap in a magnetic circuit. (Japanese Patent
Publication No. 45-7590). After that, utilizing the above-described invention, a speaker was
proposed which was made damperless while applying the phenomenon of rising up in the voice
coil terminal portion-air gap and floating the cone itself without being fixed to a frame etc. In this
case, it should be taken into consideration that the voice coil instantaneously jumps out of the
magnetic circuit at the same time as 1 energization and it is necessary to prevent this. The
present invention has been made for this purpose [111111], and is intended to hold a cone at a
lead base as a processing for a lead of a voice coil. That is, five wires formed by forming a
magnetic material skin layer on the outer periphery of the good conductor and an electric
insulation coating layer on the outer periphery thereof are wound to form a voice coil and this is
contained in the pole gap in the magnetic circuit. Arrange in a floating state, connect the voice
coil to the cone and allow the cone itself to float without supporting or fixing the edge of the
cone at all, and also lead wires of the 10 voice coil respectively. It is taken out on the other side,
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attached to the lower surface of the cone and bent at its base end into a U-shaped or spiral form
having elasticity, and its tip is connected to the terminal attached to the frame. Is a speaker. An
embodiment of the present invention will be described with reference to the drawings. A
indicates a voice coil, B indicates a magnetic circuit, C indicates a cone, and D indicates a frame.
The voice coil A is a method of plating a ferromagnetic material, for example, a magnetic coating
layer of iron, nickel, etc. on the outer periphery of a copper wire! And a wire 1 having a resinbased insulating layer formed on the outer periphery of the wire 1. The wire 1 is wound with a
coil bobbin 2Fc. The magnetic circuit B has a pole 3. The external magnet type thing 5 comprised
by the yoke 4, the magnet 5, and the plate 6 was shown. Thus, when the voice coil A described
above is disposed in the pole gap of the magnetic circuit B, the voice coil A floats in the gap. This
phenomenon is manifested by configuring the voice coil A as described above, and the
electrokinetic converter (Japanese Patent Publication No. 45-7590) previously proposed is based
on this.
Also in the present invention, by utilizing the above-described invention, the voice coil A is not
held by the damper, and furthermore, the voice coil terminal portion is formed by connecting the
cone without attaching or supporting the cone edge. . That is, the cones may be flat cones or
curved cones, or they may be wrinkled. [111111] EndPage: The shape of the cone does not
matter, but the cone is completely free without sticking or supporting the edge to a frame or the
like and floats with the voice coil A. To make the cone float as above. The material of the cone,
the size ratio to the voice coil. The diameter of the voice coil, the wire diameter of the wire I, the
magnetic flux density, etc. must be determined comprehensively. Further, at the central portion
of the cone C, a short tubular portion 7C for attaching the bobbin 2 of the voice coil A was
formed. The lead wire 1a of the filament 1 is taken out on each right side of the coil bobbin 2 and
wound on the lower surface of the cone C, and bent in a U-shape or spiral shape to form an
elastic portion 1b. It is electrically connected to the terminal IC attached to the outside of D. Since
the present invention is configured as described above, the voice coil A is floated while holding
its center in the pole gap of the magnetic circuit B without the damper, and the cone C connected
to this is also the edge It is properly held in the floating state despite being not supported or
fixed at all. In the present invention, the lead wire 1a is taken out in opposite directions and the
lower surface of the cone C is wound and attached, and the base end is bent in a U-shape or a
spiral shape to form the elastic portion 1b. Although the tip is electrically connected to the
terminal 1c attached to the frame D, the elastic portion 1b itself does not function to support the
voice coil A or the cone C, and the voice coil A is not It is in the floating state by making it such a
configuration. [1111111] The voice coil A configured as described above actually has a tendency
to fly out of the magnetic circuit due to the magnetic impact at the same time when it is
energized, thus preventing the cone C from popping out It is necessary in the present invention
to achieve the object by making the lead wire 1a as described above. That is, the cone C is not
disturbed equally by the presence of the elastic portion 1b, and of course, proper oscillation can
be performed as well as the rotation accompanying the oscillation of the cone C and the voice
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coil A can be prevented. In the present invention, by configuring the voice coil A as described
above, there is no non-linearity of the driving force, and the cone is a complete free edge, and the
voice coil and cone float without any bearing mechanism. Because it is in the bass characteristic
also.
Or it is extremely excellent also in efficiency, and it kills by expectation as a future speaker.
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