JPS5441234

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DESCRIPTION JPS5441234
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram showing the circuit
configuration of the speaker of the present invention, FIG. 2 is a sectional view of the speaker
showing the operation of the present invention, 1 is a speaker, 2 is a voice coil, 4 is a voice coil.
The correction circuit, 11 indicates a magnetic gap, and 12 indicates a diaphragm.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker which
electrically corrects positional deviation of a voice coil with an inner length of 0.times.6
magnetics .alpha. '. Generally, when the speaker is attached upward or downward, the IIWJh
board of the speaker is placed in the lower position under its own weight. The wheel coil of the
Heus coil bobbin suspended on the diaphragm by this first position is displaced from the regular
position in the magnetic plate, and as a result, the vibration width of the moving plate becomes
smaller, It was not possible to make a good reproduced sound by making the bottom of the E- 仝
'2- イ ー 2 bobbin hit the bottom and generate a distorted sound. The present invention has been
made in view of such points, and will be described in detail below with reference to the drawings.
+ 11 is a speaker that quantifies and reproduces a voice signal when a voice signal is applied (2:
a cough speaker (1 summer voice coil, + 31 an amplifier to apply a voice signal to a cough voice
coil (2)) It is a speaker circuit configuration known to date. (4) is the displacement of the is board,
and the voice coil + 21 iCIl current is set to 1170 to correct the displacement. In the II path, the
correction circuit (4) includes a DC power supply (5), a holding resistance a (6) for preventing an
excessive output, and a adjustable resistor (7) for adjusting the correction 1a-Tt. , And the
correction circuit (4) is directly connected to the voice coil (2) through the k-bar. FIG. 2 shows a
cross-sectional view of a state in which one rib (1) is installed in seven directions. In the figure,
the voice coil (2) disposed in the magnetic gap 1 (support) of the magnetic circuit [phase] is
displaced downward by three with its own weight together with a diaphragm as shown by a
broken line. ing. In this state of the speaker (1's voice coil (-When a DC current is applied from
the correction circuit +41 to the-, the force based on Fleming's left hand law is upward based on
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the DC current and the magnetic flux of the magnetic circuit). obtain. With this force, the
diaphragm is pushed up and the voice coil (2) is corrected to a normal position in the magnetic
gear tube I shown by a solid line. Therefore, when an audio signal from the amplification It (3) is
applied to the voice coil (2) of the speaker (1), the diaphragm O responds to the audio signal and
faithfully controls the vibration width and does not hit the bottom. You can play Also, the
correction current of the correction circuit (4) is arbitrarily adjusted by the variable resistor (7)
for adjusting the output current, and the position of the voice coil (2) in the magnetic gap Q11 is
accurately adjusted to the normal position. It can be arranged.
Furthermore, the polarity switching switch (barrel is provided in the correction circuit; 4), and
the mounting of the speaker (1) is performed by switching the switch (8) even when the direction
is downward. When switched, a voice coil (a force of upward tension is obtained, so that the voice
coil (-can be positioned in the normal magnetic gear tube I). 4 Note that a correction amount
always flows through the voice coil (2) of the speaker (1), from @ f41 to ml 訛 'co-flow, and
whether the voice I No. is superimposed on the DC current and flows, the vibration book or Since
the power required to correct the positional displacement of the relay is about 1 Qnll, the selfcurrent current of the correction amount Q + 41 has no influence on the reproduction
characteristics of the speaker (1). As apparent from the above description (this note, the
loudspeaker is electrically corrected for the positional deviation of the voice coil due to the
weight of the diaphragm by applying a direct current to the voice coil associated with the
diaphragm). Since the speaker is installed, it is possible to reproduce the sound faithfully to the
hot audio current that the reproduced sound is different or distorted depending on the direction.
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