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DESCRIPTION JPH03283999

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DESCRIPTION JPH03283999
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
acoustic vibration generator that vibrates based on the strength of an audio signal. SUMMARY
OF THE INVENTION The present invention relates to an acoustic vibration generator that
vibrates based on the strength of an audio signal, comprising: a solenoid coil to which a drive
signal is supplied; a weight member driven in a predetermined direction by the solenoid coil; The
member is composed of an elastic member which is returned from the position moved by the
drive by the solenoid coil, and good vibration is performed based on the strength of the sound
signal. 2. Description of the Related Art Heretofore, it has been practiced to vibrate a chair or a
floor according to the sound reproduced from a speaker, for example, to vibrate at the time of
reproduction of low-frequency sound to give a sense of reality. In such a case, the oscillation
state of the vibration device that vibrates the chair or the floor is changed in conjunction with the
frequency or the like of the reproduction sound signal. In this conventional vibration device
based on audio signals, as described in Japanese Patent Publication No. 50-163693, etc., a
vibration unit using a relatively large speaker unit or a similar permanent magnet is attached to a
chair etc. Was made to vibrate the chair etc. By doing this, the object to be vibrated such as a
chair vibrates interlockingly with the change of the sound signal, and a vibration state matched
to the reproduced sound can be obtained. [Problems to be Solved by the Invention] However,
since the vibration device by such a speaker unit is vibration by a voice coil, there is a limit to the
output that can be vibrated, and for example, a structure such as a floor or wall is directly
vibrated. It was difficult, and in order to achieve it, a power amplifier with a very large
amplification factor was required, which was not practical. Further, the vibration device by the
speaker unit itself reproduces the sound to generate noise, and disturbs the frequency
characteristic of the sound reproduced from the speaker. Furthermore, since the vibration device
using the speaker uni-site loses energy to be vibrated as the high-pass sound becomes, there is a
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disadvantage that it does not vibrate in the high-pass sound. An object of the present invention is
to provide an acoustic vibration generator capable of favorably performing high-output vibration
based on an audio signal. [Means for Solving the Problems] The present invention, as shown in
FIGS. 1 and 2, for example, in an acoustic vibration generator for generating a vibration by a
drive signal based on an audio signal, a solenoid to which a drive signal is supplied The coil (6),
the weight member (7) driven in a predetermined direction by the solenoid coil (6), and the
elasticity for returning the weight member (7) from the position moved by the drive by the
solenoid coil (6) It is composed of the material (8).
[Operation] According to this configuration, when the drive signal based on the audio signal is
supplied to the solenoid coil (6), the weight member (7) can be vibrated to generate vibration
based on the audio signal. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An
embodiment of the acoustic vibration generator according to the present invention will be
described below with reference to the attached drawings. FIG. 1 is a perspective view showing a
vibration generating device of the present example, and FIG. 2 is a cross-sectional view showing
an outline of the inside of the vibration generating device shown in FIG. In FIG. 1, (1) shows the
whole vibration generating apparatus, and this vibration generating apparatus (1) is comprised in
the housing | casing (4) fixed with the bolt (3) on the baseplate (2). In this case, as the bottom
plate (2), one that is easy to expand and transmit vibrations such as plywood is used, and this
bottom plate (2) is placed on the floor to be vibrated. And, as shown in FIG. 2, a through hole (4a)
is provided at the central part of the case (4), and a coil case (5) is formed in the coil case (5)
around the through hole (4a). It is storing. The iron core (7) driven by the solenoid coil (6) is
disposed so as to penetrate the through hole (4a). This iron core (7) has a relatively heavy weight
of about 1 kg. In this case, in order to float the iron core (7) relative to the solenoid coil (6), an
elastic material (8) such as rubber is disposed between the iron core (7) and the through hole
(4a). Further, a stopper (9) is attached to the iron core (7), and the stopper (9) restricts the
movement of the iron core (7) more than necessary. Then, a drive circuit for generating an AC
drive signal based on the audio signal is connected to the solenoid coil (6) of the vibration
generator (1), and the iron core (7) is intermittently interrupted by the solenoid coil (6). Drive in
the direction (arrow A direction). Here, when the drive circuit connected to the solenoid coil (6) is
shown in FIG. 3, (11) in FIG. 3 indicates an audio signal source, and the audio signal source (11)
records, for example, audio signals. The audio signal output from the audio signal source (11) is
supplied to the graphic equalizer (12). The graph ink equalizer (12) extracts a predetermined
frequency band set in advance from the supplied audio signal, and supplies the extracted audio
signal to the rectifier circuit (14) by the diode bridge via the amplifier (13). . Then, an audio
signal rectified by the rectification circuit (14) and converted into a direct current is supplied to
the primary side (light emitting element side) (21) of the photothyristor coupler (20).
In this case, one output terminal of the rectifier circuit (14) is connected to the primary side (21)
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of the photothyristor coupler (20) through the resistor (15), and one output terminal of the
rectifier circuit (14) The other output terminal is connected by a capacitor (16). Then, a triac (32)
to which 100 ν commercial AC power is supplied is controlled by the output of the secondary
side (photosylek side) (22) of the photocylips coupler (20). That is, one output terminal of an AC
signal source (31) that outputs a 100 V commercial AC power supply is connected to the first
anode of the triac (32). Further, the other output terminal of the AC signal source (31) is
connected to one output terminal (33) connected to the solenoid coil (6). Then, one output
terminal of the alternating current signal source (31) is connected to one end of the bidirectional
diode (36) through the resistor (35), and the other end of the bidirectional diode (36) is Connect
to one end (anode side) of the secondary side (22) of the blanket (20). Then, the second anode of
the tribook (32) is connected to the other output terminal (34) connected to the solenoid coil (6),
and the other end (22) of the photothyristor cover (20) The cathode side is connected to the gate
electrode of the triac (32) and to the second anode of the triac (32) via a resistor (38).
Furthermore, the connection midpoint between the resistor (35) and the bidirectional diode (36)
is connected to the second anode of the triac (32) via a capacitor (37). Then, the solenoid coil (6)
of the vibration generator (1) is connected between the output terminals (33) and (34). Next, the
operation when driving the vibration generator (1) by this drive circuit will be described. First, in
the audio signal output from the audio signal source (11), a predetermined frequency band is
extracted by the graphic equalizer (12). For example, low-range sound signals are extracted.
Then, the audio signal extracted by the graphic equalizer (12) is rectified into a DC signal by the
rectification circuit (14). Therefore, the level of the rectified signal is changed due to the strength
of the audio signal. Then, the rectified signal is supplied to the photocylindrical cover (20),
whereby a gate signal of the triac (32) is created by the photoconductive round (20). That is, the
photothyristor coupler (20) outputs a current signal proportional to the level of the input voltage
signal.
The output current signal produces a gate pulse of the triac (32). This gate pulse is a signal
delayed by a period T corresponding to the current value from the zero cross point of the
sinusoidal AC signal (FIG. 4A) output from the AC signal source (31) as shown in FIG. 4B. become.
The gate pulse is supplied to the gate electrode of the tritic 32 to control an AC signal as shown
in FIG. 4C, and the controlled AC signal is supplied to the solenoid coil 6 as a drive signal. Be
done. Thus, the drive signal of the solenoid coil (6) is created, and the iron core (7) of the
vibration generator 1) is supplied at the moment when the AC drive signal as shown in FIG. 4C is
supplied. Is driven to move in the direction of the arrow 'A, and is pulled back in the opposite
direction by the elastic member (8) at the non-signal part of this drive signal (corresponding to
the period T in FIG. 4B). ) Will vibrate. By the vibration of the iron core (7), the floor on which the
bottom plate (2) of the vibration generating bag W (1) is vibrated. Here, in this example, the
average voltage of the drive signal changes based on the strength of the audio signal output from
the audio signal source (11), and the vibration amount (amplitude of the iron core (7) driven by
the solenoid coil (6) Changes, and a vibration corresponding to the audio signal level is obtained.
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In this case, since a 100 v commercial AC power supply is directly controlled by the TRIAC (32)
to obtain a drive signal, a drive signal with a large output sufficient to vibrate a structure such as
a floor by vibration of the iron core (7) is obtained. Be And since the vibration at this time is the
vibration by the iron core (7), noise that disturbs the frequency characteristic of the reproduced
voice like the vibration generating device by the speaker unit does not occur, and a good
vibration can be generated. In addition, although noise is slightly generated due to the vibration
of the iron core (7), for example, the whole vibration generating device (1) is covered with an
elastic material such as silicone rubber and only the bottom plate (2) is taken out from the elastic
material. The noise may be prevented from being transmitted to another. Further, in the case of
the vibration generating device by the speaker unit, it is difficult to vibrate the vibrating device
by the high frequency sound, but in this example, even the high frequency sound can generate
the corresponding vibration. Thus, a large vibration that directly vibrates the wall or floor can be
generated, and the amount of vibration changes based on the strength of the audio signal, so that
the reproduction space can be vibrated in accordance with the audio reproduced from the
speaker. Can play realistically.
In this case, since the graphic equalizer (12) can limit the frequency band of the audio signal for
producing the drive signal, it can be vibrated only when a specific sound is reproduced. Of
course, if the graphic equalizer (12) is not limited, it is possible to create a drive signal based on
audio signals of all frequency bands. Although the floor is vibrated in the above-described
embodiment, other structures may be vibrated. For example, as shown in FIG. 5, a vibration
generating device (41) configured to vibrate in conjunction with an audio signal as in the
example of FIG. 1 described above is installed under the floor, and this vibration generating bag!
One end of the connecting member (43) is connected to the end of the iron core (42) that
vibrates up and down by (41). The connecting member (43) is swingably attached at both ends
with the center part as a fulcrum (44), and the other end is connected to the support (46) of the
chair (45). With such a configuration, when the iron core (42) of the vibration generating device
(41) vibrates, this vibration is transmitted to the chair (45) through the connecting member (43),
and the chair (45) receives an audio signal. Synchronize and vibrate up and down. Furthermore,
the present invention is not limited to the above-described embodiment, and it goes without
saying that various other configurations can be taken. According to the sound and vibration
generating apparatus of the present invention, the drive signal based on the sound signal is
supplied to the solenoid coil, whereby the weight member vibrates, and a good high power
vibration based on the sound signal is obtained. Can be generated. In this case, noise that
disturbs the frequency characteristic of the reproduced sound such as the vibration generating
device by the speaker unit is not generated, and the corresponding vibration is generated even if
the reproduced sound is high frequency band sound. Can.
[0002]
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Brief description of the drawings
[0003]
1 is a perspective view showing an embodiment of the acoustic vibration generating apparatus of
the present invention, FIG. 2 is a cross sectional view showing an outline of the inside of FIG. 1
example, and FIG. 3 is a block diagram of a drive circuit of one embodiment. FIG. 4 is a waveform
diagram for describing one embodiment, and FIG. 5 is a configuration diagram of another
embodiment.
(1) is a vibration generator, (6) is a solenoid coil, (7) is an iron core, and (8) is an elastic material.
Agent Hidetoshi Matsushima
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