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JPH05260578

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DESCRIPTION JPH05260578
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
built-in amplifier type speaker device suitable for use in expanding reproduced sound of portable
audio equipment such as headphone stereo.
[0002]
2. Description of the Related Art FIG. 10 shows an example of a system configuration using
headphone stereo and headphones. In the figure, 30 is a headphone stereo, and 31 is a jack as an
audio output terminal. Also, 40 is an inner-ear type headphone with remote control, 41 is a cord,
42L and 42R are left and right housing parts provided with respective speaker units connected
to one end of the cord 41, 43 is connected to the other end of the cord 41 The plug 44 is a
remote control unit disposed in the middle of the cord 41.
[0003]
In the above configuration, the user can hear the reproduction sound of the headphone stereo 30
by inserting the housing portions 42L and 42R into the left and right ear holes while inserting
the plug 43 of the headphone 40 into the jack 31 of the headphone stereo 30. it can. In this case,
by operating the remote control operation unit 44, it is possible to control the operation
(reproduction, fast forward, rewind, stop, etc.) of the headphone stereo 30.
01-05-2019
1
[0004]
Thus, although the reproduction sound of the headphone stereo 30 can be heard using the
headphones 40, the reproduction sound can be heard by a plurality of people by using a speaker
with a built-in amplifier as is well known. FIG. 11 shows an example of the system configuration
of the headphone stereo and the speaker device.
[0005]
In the figure, 50 is a speaker device, 51 is a jack as a signal input terminal, 52 is an amplifier for
amplifying an audio signal supplied to the jack 51, and 53 is a speaker to which the audio signal
amplified by the amplifier 52 is supplied. Further, 60 is a pin cord, and 61 and 62 are plugs
connected to one end and the other end.
[0006]
In the above configuration, the playback sound of the headphone stereo 30 is a speaker by
inserting the plug 61 at one end of the pin cord 60 into the jack 31 of the headphone stereo 30
and inserting the plug 62 at the other end into the jack 51 of the speaker device 50. The sound is
loudened by the apparatus 50, and the reproduced sound can be heard by multiple persons.
[0007]
SUMMARY OF THE INVENTION As shown in the example of FIG. 11, according to the connection
between the headphone stereo 30 and the speaker device 50 using the pin cord 60, the plug 61
of the pin cord 60 is inserted into the jack 31. As a result, the headphones 40 can no longer be
connected.
Therefore, the remote control operation using the remote control operation unit 44 of the
headphone 40 can not be performed.
[0008]
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2
Moreover, according to the example of FIG. 11, in order to connect the headphone stereo 30 and
the speaker apparatus 50, it is necessary to provide the pin code 60. FIG.
[0009]
Therefore, the present invention provides a speaker device that can effectively use headphones
and does not require a separate connection cord.
[0010]
SUMMARY OF THE INVENTION A speaker device with a built-in amplifier according to the
present invention is characterized in that the signal input terminal is provided with a magnetic
coupler.
[0011]
In the above-mentioned configuration, when the housing (speaker unit) of the headphone
connected to the audio equipment is attached to the magnetic coupler, for example, an audio
signal outputted from the audio equipment is obtained from the magnetic coupler and this is an
input signal. It becomes.
[0012]
Since headphones can be used as the connection means, for example, in the case of headphones
with a remote control, the remote control function can be effectively used, and it is not necessary
to prepare a separate connection cord.
[0013]
An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a front perspective view of the speaker device 100 according to the embodiment, FIG. 2
is a rear perspective view (in a state where the lid is closed), and FIG. 3 is a rear perspective view
(in a state where the lid is open).
[0014]
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3
In the figure, 1 is a cabinet.
As shown in FIG. 1, left and right speakers 2 </ b> L and 2 </ b> R are disposed on the left and
right ends of the cabinet 1 toward the front.
As shown in FIG. 3, the cabinet 1 is provided with a housing portion 3 for housing the headphone
stereo 30 at the center thereof, and a housing portion 5 for housing the battery 4 on both sides
of the housing portion 3 and a circuit board (FIG. A storage unit 6 is provided for storing (not
shown).
The circuit board is provided with an equalizer for correcting frequency characteristics as
described later and an amplifier for amplifying an audio signal.
[0015]
Moreover, as shown to FIG. 2, FIG. 3, the lid 7 is attached to the back side of the cabinet 1 so that
opening and closing is possible.
When the lid 7 is closed, the locking portions 8, 8 of the lid 7 are locked to the hook portions 9,
9 provided in the cabinet 1, and the closed lid state shown in FIG. 2 is maintained. On the other
hand, in the closed state, by operating the operation portion 10 in the arrow direction x, the
locked state of the hook portions 9, 9 with respect to the locking portions 8, 8 is released, and
the open state shown in FIG. . The hooks 9 and 9 are always biased by the spring members in the
direction opposite to the arrow direction x.
[0016]
また、11L,11Rはそれぞれマグネチックカップラーである。 As shown in FIG. 4, the
coupler 11 </ b> L is configured by disposing a core 14 having a magnetic induction coil 13
wound around a bottom of a cylindrical case 12 with a bottom. The coupler 11R is also
configured in the same manner as the coupler 11L. The couplers 11L and 11R are disposed on
the lid 7 such that the bottom of the housing 12 is inside as shown in FIGS. Reference numerals
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4
15 and 16 denote holding members for stably holding a housing portion of a headphone, which
will be described later, and are formed of, for example, an elastic member such as urethane foam.
[0017]
Further, output signals of the couplers 11L and 11R are supplied to the circuit board housed in
the housing portion 6. That is, the output signal of the coupler 11L is corrected by the equalizer
17 as shown in FIG. 4 and then amplified by the amplifier 18 and supplied to the speaker 2L. The
equalizer 17 is configured to have a frequency characteristic of −6 dB / oct as shown in FIG. The
output signal of the coupler 11R is similarly processed and supplied to the speaker 2R.
[0018]
Further, in FIGS. 1 to 3, reference numeral 19 denotes a switch for controlling on / off of the
power supply of the circuit board, and reference numeral 20 denotes a light emitting element for
battery check which indicates the state of the battery.
[0019]
In the above configuration, when the speaker device 100 of this example is used to expand the
reproduced sound of the headphone stereo 30, the switch 19 is operated to turn on the power of
the circuit board. The plug 43 of the headphone 40 is connected to the jack 31 of the headphone
stereo 30 housed in the cabinet 1 or placed outside the cabinet 1 (see FIG. 10), and the housing
portions 42L and 42R of the headphone 40 are coupled to the couplers 11L and 11R,
respectively. Fasten to (Figure 6).
In this case, the holding members 15 and 16 are deformed to insert the housing portions 42L
and 42R into the inside of the housing 12 from the opening portion. The housing portions 42L
and 42R are stably held by the couplers 11L and 11R, respectively, by the repulsive force of the
holding members 15 and 16.
[0020]
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5
In FIG. 7, the part which fixed the housing part 42L to the coupler 11L is shown as sectional
drawing. In the housing portion 42L, 42a is a housing, 42b is a yoke serving as a frame, 42c is a
magnet, 42d is a pole plate (pole piece), 42e is a voice coil, 42f is a diaphragm, 42g is a
protective plate, and 42h is a fixing It is a ring-shaped member. The part which fixed the housing
part 42R to the coupler 11R is similarly comprised.
[0021]
Since the couplers 11L and 11R and the housing portions 42L and 42R of the headphones 40
are in a relationship as shown in FIG. 7, when the left and right audio signals are supplied from
the headphone stereo 30 via the plug 43 to the headphones 40, Left and right audio signals are
output from the couplers 11L and 11R by electromagnetic coupling.
[0022]
Here, to explain the principle of the electromagnetic coupling, as shown in FIG. 8, when the drive
power ein is supplied to the voice coil 42e, a magnetic flux φ is generated from the voice coil
42e, and the magnetic induction coil 13 corresponds to the drive power ein. The induced voltage
eout is obtained.
Therefore, when an audio signal is supplied to the voice coil 42e, an audio signal is obtained in
the magnetic induction coil 13.
[0023]
Since electromagnetic coupling is used, the frequency characteristics of the output signals of the
couplers 11L and 11R are 6 dB / oct as shown in FIG.
[0024]
The left audio signal output from the coupler 11L is supplied to the equalizer 17 as shown in FIG.
7 and the frequency characteristic added by electromagnetic coupling is corrected, and then
amplified by the amplifier 18 and supplied to the speaker 2L.
Although not shown, the right audio signal output from the coupler 11R is also corrected in
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6
frequency characteristic and further amplified and supplied to the speaker 2R. Thereby, the
reproduction sound of the headphone stereo 30 can be expanded by the speakers 2L and 2R.
[0025]
As described above, according to this embodiment, the reproduction sound of the headphone
stereo 30 can be expanded only by mounting the housing portions 42L and 42R of the
headphone 40 connected to the headphone stereo 30, for example, to the magnetic couplers 11L
and 11R.
[0026]
Therefore, when the headphone 40 is equipped with a remote control, the remote control
operation unit 44 can be operated to effectively utilize the remote control function.
When the headphone stereo 30 is stored in the storage unit 3 of the cabinet 1, the remote
control operation can be performed by pulling out the remote control operation unit 44 to the
outside. In addition, even without a connection cord such as a pin cord, the reproduction sound
of the headphone stereo 30 can be easily amplified.
[0027]
In the above-described embodiment, only the couplers 11L and 11R are provided as the signal
input terminals, but normal signal input terminals formed of jacks or the like may be provided in
parallel.
[0028]
Further, in the above-described embodiment, although an example has been described in which
the reproduction sound of the headphone stereo 30 is expanded, the sound from audio
equipment such as a CD player using a headphone and a radio receiver can be similarly
expanded.
[0029]
Furthermore, the configuration for holding the housing portions 42L and 42R is not limited to
the above-described example, and for example, the couplers 11L and 11R are provided with
holding means made of an elastic member such as rubber, You may do it.
01-05-2019
7
[0030]
According to the present invention, since headphones can be used as a connection means with an
audio device, headphones can be effectively used and there is no need to prepare a separate
connection cord.
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