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JP2017118469

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DESCRIPTION JP2017118469
Abstract: In a speaker device, it is possible to maintain high sound quality of products including
transient characteristics so that bass and treble can be emphasized. A composite speaker unit SP
(L), SP (R) is accommodated in a main body by facing a first unit speaker unit A for bass and a
second unit speaker unit B for high sound. There is. The first and second vibrating membranes of
the first and second unit speaker parts A and B vibrate in the same direction. The first supply
circuit 37 for supplying an audio signal to the first unit speaker unit A and the second supply
circuit 55 for supplying the same audio signal to the second unit speaker unit B are provided.
Resistor R2 in series. The first (second) switch SW1 (SW2) sequentially switches the short circuit
of the first resistor R1, the opening of the first and second resistors R1 and R2, and the short
circuit of the second resistor R2. [Selected figure] Figure 4
Speaker device
[0001]
The present invention relates to a speaker device, and more particularly to an improvement of a
speaker device that can be used as an earphone or a headphone worn on a user's ear.
[0002]
Conventionally, as a speaker device to be attached to a user's ear, for example, as shown in FIG.
9, a cylindrical magnet (not shown in FIG. 9 is hidden in the cup-like yoke 3 disposed in the case
main body 1).
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), And the thin diaphragm 5 is fixed to the tip of the yoke 3 so as to face the other end of the
magnet at an interval to cover the opening of the yoke 3, A cylindrical coil fixed to 5 (not visible
in FIG. 9). Is well known in the art in which the space between the outer periphery of the magnet
3 and the inner wall of the yoke 3 is inserted at a distance.
[0003]
In FIG. 9, the case main body 1 is composed of a base 1a and a front cover 1b covering the tip
(right side in the drawing). A sound passing cylinder 7 is integrally formed from the front cover
1b, with the tip of the opening of the yoke 3 being fixed in the front cover 1b and for guiding the
sound produced by the vibration of the diaphragm 5 to the outside A flexible not-shown ear tip
(ear pad, ear piece) is fitted to the through cylinder 7.
[0004]
In this speaker device, the drive unit 9 for vibrating the diaphragm 5 is formed of the magnet and
the coil described above, and the diaphragm 5 is vibrated to generate sound by applying an audio
signal to the coil from the outside with a cable (not shown). The sound produced is transmitted
from the sound through hole 11 of the sound through cylinder 7 to the outside.
[0005]
And although this illustration is omitted, a speaker device of this kind is actually manufactured
by, for example, insertion into an ear canal, and a vibrating membrane is formed in the ear
concha cavity surrounded by the user's tragus, tragus and concha. The case body 1 is inserted in
such a manner that the case 5 is brought close to the concha and the ear tip is inserted so as to
elastically abut the ear canal extending from the concha cavity to the tympanic membrane.
[0006]
In such a speaker device, the applicant has proposed a new earphone device according to
International Publication No. WO 2014/061092 (Patent Document 1) because there is room for
improvement in driving sound and distortion to be produced.
[0007]
The earphone device drives the first diaphragm by the first yoke, the first diaphragm supported
by the first yoke, and the audio signal supported and applied in the first yoke. To form a first
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speaker unit having a first driving unit, and a second yoke, a second diaphragm supported by the
second yoke, and a second diaphragm supported by the second yoke And a second drive unit for
driving the second diaphragm by the audio signal.
[0008]
In addition, the first and second speaker parts are disposed and integrated such that the first and
second vibrating membranes are spaced and face each other in an airtight state, and the first and
second vibrating membranes are integrated. Are arranged to vibrate in the same direction.
[0009]
In such an earphone device, the drive sound can be increased by the first and second speaker
portions, and odd-order distortion that is considered to have an adverse effect on the sound
quality can be reduced to improve the quality of the drive sound. It is.
[0010]
WO 2014/061092
[0011]
However, with respect to recent speaker devices, there is a strong demand from general users for
a configuration that allows the user to adjust the sound quality characteristics preferred by the
user, in particular, high sound and bass sound pressure.
[0012]
With respect to such a demand, in the speaker device shown in FIG. 9 described above, the small
holes 13a are formed through the back of the yoke 3 in the base 1a, and the small holes 13b are
formed through the front cover 1b. By opening or closing the small holes 13a and 13b, as shown
in FIG. 10, it was possible to adjust the level of the bass sound pressure.
[0013]
Furthermore, in the speaker apparatus shown in FIG. 9 described above, by closing the sound
through hole 11 with the acoustic filter 17 inside the front cover 1b, it is also possible to adjust
to lower the high sound pressure as shown in FIG. The
[0014]
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However, in the configuration shown in FIG. 9 in which the first and second speaker portions
proposed by the present applicant are arranged in pairs, the small holes 13a and 13b and the
acoustic filter 15 are formed and arranged at the first and It affects the complex speaker section
2 in a complex manner, making it difficult to adjust the sound pressure level of practical bass and
treble, and it is inconvenient that the left and right units have to be adjusted separately.
[0015]
As another method, as shown in FIG. 11, capacitors C1 and C2 for adjusting the sound quality are
connected in series in a supply circuit for supplying an audio signal from the audio signal source
19 to the drive coil 17 of a single dynamic type speaker configuration. A configuration is also
known in which switching switches sw1 and sw2 are connected to connect in parallel and short
both ends of the capacitors C1 and C2.
[0016]
In this configuration, as shown in FIG. 12, the sound pressure level adjustment of the bass is
possible by shorting and opening both ends of the capacitor C1 inserted in series, and the sound
pressure of high sound is generated by shorting and opening both ends of the capacitor C2
inserted in parallel. Level adjustment is possible.
[0017]
However, when applying the configuration as shown in FIG. 11 to the above-mentioned
configuration proposed by the present applicant, two capacitors C1 and C2 and switches sw1 and
sw2 are required for a single speaker configuration, and a circuit There is a problem that the
configuration is complicated and the adjustment is also complicated.
[0018]
Furthermore, depending on how to select the constant of the component parts, it may be
necessary to use large parts, securing space is a serious problem in small earphones etc., and the
sound quality may be degraded depending on the selection of capacitor parts. There is a
drawback.
[0019]
Therefore, as a result of observing and examining the configuration in which the above-described
first and second speaker units are arranged, the inventor of the present invention takes
advantage of the features of the first and second speaker units, and By changing the resistance
value of the supply circuit, it was found that the adjustment of the sound pressure enhancement
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of high and low tones was possible, and the present invention was completed.
[0020]
The present invention has been made to solve such problems, and it is possible to improve the
quality of the drive sound while maintaining the increase in the drive sound, and to adjust the
frequency characteristics relating to the sound pressure, particularly the high sound or the low
sound An object of the present invention is to provide a speaker device capable of adjusting and
enhancing pressure.
[0021]
In order to solve such problems, the speaker device according to the present invention is
characterized in that the same first audio signal unit is applied as the first audio unit unit of
dynamic type to vibrate the first diaphragm by applying the audio signal. A composite speaker
which is accommodated in the same main body in a state in which the second diaphragm unit of
the dynamic type is vibrated and the second unit loudspeaker unit of the dynamic type is
generated with characteristics different in frequency characteristics from the first unit
loudspeaker unit. The first speaker and the second speaker, wherein the first and second
diaphragms are vibrated in the same direction, and are serially inserted in the first supply circuit
for supplying the audio signal to the first unit speaker. A first resistor connected, a second
resistor serially inserted in and connected to a second supply circuit that supplies the audio
signal to the second unit speaker unit, and a short circuit of the first resistor, First Opening of the
second resistor, and a sequentially switching switches a 3-position of the second resistor
shorting.
[0022]
In the speaker device according to the present invention, the first unit speaker unit is formed for
low frequency sound generation to a low frequency, and the second unit speaker unit is formed
for high frequency sound generation from the first unit speaker unit. Configurations are also
possible.
[0023]
In the speaker device according to the present invention, the first and second unit speaker parts
face the first and second vibrating membranes at a slight distance and seal or substantially seal
between the first and second vibrating membranes. It is also possible for the arrangement to be
arranged sealingly.
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[0024]
In the speaker device according to the present invention, the first resistance is set to a value
within 1/2 to 5 times the internal resistance of the first unit speaker portion, and the second
resistance is inside the second unit speaker portion. A configuration that is set to a value within
1⁄2 to 5 times the resistance is also possible.
[0025]
The speaker apparatus according to the present invention uses a main cable for supplying the
audio signals of the left and right channels and a left and right channel branched from the main
cable, wherein one of the two speaker devices is for the left channel and the other is for the right
channel. The left channel branch cables form their first and second feeds of the left channel, the
right channel branch cables form their first and second feeds of the right channel The switches in
the left and right channel speaker devices may be configured to be switched at the same time by
the operation from the outside at the same time, and may be disposed in the vicinity of the
branch position.
[0026]
In such a speaker device according to the present invention, while the first and second unit
loudspeakers of dynamic type are produced with characteristics having different frequency
characteristics, the first and second diaphragms are vibrated in the same direction. A composite
speaker unit is formed, and a first resistor is supplied in series to a first supply circuit to the first
unit speaker unit, and a second resistor is connected in series to a second supply circuit to the
second unit speaker unit. The drive noise is increased by providing a switch for sequentially
switching the three positions of the first resistor short circuit, the open circuit of the first and
second resistors and the short circuit of the second resistor. It is possible to improve the quality
of the driving sound while maintaining the above, and to perform emphasis adjustment on the
sound pressure of the reproduced sound.
[0027]
In the speaker device according to the present invention, the first unit speaker unit is formed for
low frequency sound generation to a low frequency, and the second unit speaker unit is formed
for high frequency sound generation from the first unit speaker unit. In particular, emphasis
adjustment of the bass and treble range is possible in the resulting configuration.
[0028]
In the speaker device according to the present invention, the first and second vibrating
membranes of the first and second unit speaker parts are opposed at a slight interval, and the
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first and second vibrating membranes are sealed or substantially sealed. In particular, stable and
reliable emphasis adjustment of the low range and high range is possible.
[0029]
In the speaker device according to the present invention, if the first and second resistances are
set to a value within 1/2 to 5 times the internal resistance of the first and second unit speaker
portions, the sound can be produced within a practical range. Emphasis adjustment of pressure is
possible.
[0030]
In the speaker device according to the present invention, one of the two pairs of the speaker
devices is for the left channel and the other is for the right channel, and the switches of the
speaker devices for the left and right channels are switched at the same time by the external
operation. By arranging the switches in the vicinity of the branch position from the main cable in
the branch cable of the left and right channels forming the first and second supply parts, sound
pressure emphasis adjustment of the left and right channels is possible, and from the outside
Switch operation of both channels can be easily done at once.
[0031]
It is a longitudinal cross-sectional view which shows an example of the compound speaker part
suitable for implementation of the speaker apparatus based on this invention.
It is a schematic sectional drawing which shows the principal part which concerns on the
compound speaker part of FIG.
It is a wave form diagram explaining operation | movement of the compound speaker part of FIG.
It is a circuit diagram showing an example of an embodiment of a speaker device concerning the
present invention.
It is a principal part circuit diagram explaining operation | movement of the speaker apparatus of
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FIG.
It is a characteristic view which concerns on the speaker apparatus of FIG.
It is a characteristic view which concerns on the speaker apparatus of FIG.
It is an external view which shows the example which applied the speaker apparatus of FIG. 4 to
the actual product.
It is sectional drawing which shows the conventional speaker apparatus.
It is a characteristic view of the speaker apparatus of FIG.
It is a circuit diagram showing the conventional speaker apparatus.
It is a characteristic view of the speaker apparatus of FIG.
[0032]
Hereinafter, embodiments of a speaker device according to the present invention will be
described with reference to the drawings.
First, the composite speaker unit SP used in the speaker device according to the present
invention will be described with reference to FIGS. 1 and 2. FIG.
[0033]
In FIG. 1, the composite speaker unit SP used in the present invention is coaxially disposed so
that the first unit speaker unit A and the second unit speaker unit B having substantially the
same shape as each other face each other coaxially. It is a compound speaker part formed.
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[0034]
As shown in FIG. 2, the first unit speaker portion A is made of a magnetic material and has a cupshaped first yoke 21, a first diaphragm 23 supported by the first yoke 21, and an audio signal.
And a first drive unit 25 for driving the first vibration film 23.
[0035]
One end face of the cylindrical first magnet 27 is superimposed on the inner bottom portion of
the first yoke 21, and the other end face has a first holding plate 29 formed in a ring shape from
a magnetic material. The first circuit board 31 is stacked on the outer bottom of the first yoke 21.
[0036]
A first support cylinder 33 is penetrated through the inner bottom of the first yoke 21, the first
magnet 27, the first pressing plate 29 and the central portion of the first circuit board 31, and
the first support cylinder The first magnet 27 and the first pressing plate 29 are crimped so as to
expand both ends of the first and second magnets 27 and 29 in the first yoke 21, and the first
circuit board 31 is outside the first yoke 21. It is fixed to the bottom.
[0037]
At the open end of the first yoke 21, the thin first vibrating membrane 23 described above is
fixed to the tip of the first yoke 21 so as to face the first magnet 27 with a gap, thereby The
opening of the first yoke 21 is covered.
[0038]
One end face side of the cylindrical first coil 35 is fixed to the first vibrating film 23, and the first
coil 35 is inserted and arranged on the outer periphery of the first magnet 27 with a slight gap.
There is.
The first drive unit 25 described above is formed by the first magnet 27 and the first coil 35.
[0039]
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The first circuit board 31 has a terminal (+) to which a first supply circuit (cable) 37 for
supplying an audio signal from the outside is connected, and is disposed on the first yoke 21 and
the first diaphragm 23 The voice signal is supplied to the first coil 35 by the lead wire (not
shown).
The terminal (−) of the first circuit board 31 is connected to the ground line G.
[0040]
The second unit speaker portion B includes a cup-shaped second yoke 39 made of a magnetic
material, a second vibrating membrane 41 supported by the second yoke 39, and a second
vibrating membrane by an audio signal. And a second drive unit 43 for driving the drive unit 41.
[0041]
On the inner bottom of the second yoke 39, one end face of the cylindrical second magnet 45 is
overlapped, and on the other end face, a second holding plate 47 formed in a ring shape from a
magnetic material is overlapped. A second circuit board 49 is superimposed on the outer bottom
of the second yoke 39.
[0042]
A second support cylinder 51 is penetrated through the inner bottom portion of the second yoke
39, the second magnet 45, the second pressing plate 47, and the central portion of the second
circuit board 49, and the second support cylinder The second magnet 45 and the second holddown plate 47 are crimped so as to expand at the two tips of the 51, and the second circuit board
49 is outside the second yoke 39 in the second yoke 39. It is fixed to the bottom.
[0043]
At the open end of the second yoke 39, the thin second vibrating membrane 41 described above
is fixed to the tip of the second yoke 39 so as to face the space with the gap, and the opening of
the second yoke 39 Is covered.
[0044]
One end face side of the cylindrical second coil 53 is fixed to the second vibrating film 41, and
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the second coil 53 is inserted and arranged on the outer periphery of the second magnet 45 at a
slight interval. There is.
The second drive unit 43 described above is formed by the second magnet 45 and the second
coil 53.
[0045]
The second circuit board 49 has terminals (+) and (-), and the terminal (-) is connected to a
second supply circuit (cable) 55 for supplying an audio signal from the outside, and the terminal
(+) ) Are connected to the terminal (-) of the first circuit board 31 and are arranged in the second
yoke 39 and the second vibrating membrane 41 by the lead wires (not shown). An audio signal is
supplied to the second coil 53.
[0046]
The first and second unit speaker parts A and B are integrated by being supported and fixed by
the flat and annular coupling member 57 such that the first and second vibrating membranes 23
and 41 face each other with a slight gap. The first and second vibrating membranes 23 and 41
are airtight (sealed).
[0047]
Each component mentioned above is selected so that the 1st unit speaker part A produces a
sound to low tones, and each composition mentioned above so that the 1st unit speaker part A
may sound to a higher sound from the 2nd unit speaker part B is selected. A member is selected.
[0048]
Returning to FIG. 1, the first unit speaker portion A is fitted with a cup-shaped synthetic resin
housing 59 so as to cover the first yoke 21 and the first circuit board 31 so as to fit in the
connecting member 57. It is fixed to
The first and second supply circuits 37, 55 are derived from the housing 59.
[0049]
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An annular flat synthetic resin cover 61 is placed on the second unit speaker portion B so as to
cover the second yoke 39 and the second circuit board 49, and the connecting member 57 is
placed between them. The cover 61 is fixed to the connecting member 57.
[0050]
The housing 59, the connecting member 57 and the cover 61 are fixed by an adhesive (not
shown) or the like and integrated, and the first and second unit speaker parts A and B supported
by the connecting member 57 are It is enclosed and protected by the housing 59 and the cover
61.
[0051]
To the cover 61, a synthetic resin sound tube body 63 projecting in a diagonal direction with
respect to the central axis of the second unit speaker portion B is fixed. The first and second
diaphragms 23, 41 are fixed. The sound produced by the vibration of is transmitted from the
sound tube 63 to the outside.
[0052]
At the bottom of the second unit speaker portion B, a sound through hole 65 through which the
sounded drive sound is passed to the sound through cylinder 63 is formed.
An ear tip 67 made of a flexible synthetic resin is detachably fitted around the tip end side outer
periphery of the sound passing cylinder 63.
Reference numeral 69 in FIG. 1 denotes a cable for connecting the first and second circuit boards
31 and 49.
[0053]
In such a composite speaker unit SP, an audio signal is transmitted to the first and second coils
35 and 53 of the first and second unit speaker units A and B via the first and second supply
circuits 37 and 55. By applying the voltage, the first and second drive units 25 and 43 vibrate
the first and second diaphragms 23 and 41 to generate sound, and the sound through holes 65
and the cover 61 of the second unit speaker unit B are generated. The sound is transmitted from
the sound tube 63 to the outside.
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[0054]
In addition, although the speaker unit SP is not shown, the housing 69 and the cover 61 are
housed in the concha cavity surrounded by the tragus, antiparallel, and concha, and the ear tip
67 of the tip is inserted into the external ear canal It is worn and used.
[0055]
Moreover, as shown in FIG. 2, the first and second coils 35, 53 of the first and second unit
speaker portions A, B are connected so that the same audio signals are applied in opposite
phases, respectively. Since the first and second vibrating membranes 23, 41 are disposed facing
each other with a slight gap and the space between them is airtight, the first and second
vibrating membranes 23, 41 are in the same direction. It generates almost the same vibration
displacement and produces a loud vibration noise.
[0056]
In this respect, in the first unit speaker unit A or B alone as in the prior art, when the input signal
is large due to the structure of the speaker unit and the shape of the vibrating film, the operation
of the vibrating film is upward (convex) The vibration does not become symmetrical vibration in
the direction and the downward (concave) direction, and as shown in FIG. 3A or 3B, generally,
distortion easily occurs from one side of the vibration, and the first and second vibrating films
23, 41 Vibration is difficult to be symmetrical.
[0057]
However, as described above, the first and second vibrating membranes 23 and 41 of the first
and second unit speaker portions A and B opposite to each other vibrate at the same time and in
the same direction with the same vibration width. As a result, as shown in the composite
waveform of FIG. 6C, the vibrations of the first and second vibrating films 23 and 41 are likely to
be symmetrical, the distortion is small, and the waveform is large.
[0058]
Next, an embodiment of a speaker device according to the present invention will be described
with reference to FIG.
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FIG. 4 is a book in which two (two on the left in FIG. 4) are used for the left channel and the other
(on the right in FIG. 4) for the right channel. 1 illustrates an embodiment of a speaker device
according to the invention.
[0059]
The composite speaker unit SP (L) is for the left channel, and the composite speaker unit SP (R) is
for the right channel, and the speaker devices SP (L) and SP (R) for the left and right channels are
symmetrical in circuit. Besides, since the speaker device according to the present invention is
established by only one of the speaker devices for monaural use, for example, a speaker device
for the left channel will be described below.
[0060]
In FIG. 4, the first unit speaker portion A of the composite speaker portion SP (L) shown in FIG. 1
and FIG. 2 is formed for a low frequency sound producing up to low frequency, and has an
internal resistance of, for example, about 32 Ω. One end of a first resistor R1 having a resistance
value (32Ω) similar to the internal resistance is connected to one end of a first coil 35 forming
the same.
In addition, compound speaker part SP (L) is simplified and illustrated in figure (the following is
same).
[0061]
The second unit speaker unit B of the composite speaker unit SP (L) shown in FIGS. 1 and 2 is
formed for high-pitched sounds that are emitted to the high-pitched sound from the first unit
speaker unit A, and has an internal resistance of about 16 Ω, for example. One end of a second
resistor R2 having the same resistance value (16Ω) as that of the internal coil is connected to
one end of the second coil 53 that forms the coil.
[0062]
The first resistor R1 is serially inserted in and connected to a first supply circuit 37 that supplies
an audio signal to the first coil 35 in the first unit speaker unit A, and the second resistor R2 is
The second supply circuit 55 for supplying an audio signal to the second coil 53 in the second
unit speaker unit B is serially inserted and connected.
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[0063]
The other ends of the first and second supply circuits 37 and 55, that is, the first and second
resistors R1 and R2 are connected in common and connected to the ground line G.
[0064]
The other ends of the first and second coils 35 and 53 of the first and second unit speaker parts
A and B are connected in common, and become a signal line L of an audio signal of the left
channel (see FIG. 4). Not shown here.
)It is connected to the.
[0065]
A first switch SW1 is connected to both ends of the first and second resistors R1 and R2 to
switch between short circuit and open of the both ends.
[0066]
The first switch SW1 is a contact P1 on the first unit speaker portion A (first coil 35) side of the
first resistor R1, a contact P2 at a connection point of the first resistor R1 and the second resistor
R2, The movable contact T1 having the other contact P3 of the second resistor R2 and the noncontact NC between the contacts P2 and P3 and shorting the contacts P1 and P2, the contacts P2
and NC, and the contacts P2 and P3 It has one circuit and three contacts.
[0067]
The movable contact T1 is short circuited only at both ends of the first resistor R1 by sliding
operation of the movable contact T1 from the outside (short circuit between contacts P1 and P2:
first position), as shown in FIG. 5A, Open the two resistors R1 and R2 at both ends (short circuit
between contact P2 and NC: second position), as shown in the same figure B, short circuit at both
ends of the second resistor R2 only (short circuit between contact P2 and P3: It is switched to 3
positions of 3rd position).
[0068]
The three-position switching operation can be bi-directional from the first resistor R1 to the
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second resistor R2, and conversely from the second resistor R2 to the first resistor R1.
[0069]
In the speaker apparatus SP (L) for the left channel having such a configuration, the first and
second resistances for the first and second coils 35 and 53 of the first and second unit speaker
parts A and B, respectively. An audio signal is supplied through the first and second supply
circuits 37 and 55 into which R1 and R2 are inserted, and the sound generation operation is
performed.
[0070]
In a state in which both ends of the first and second resistors R1 and R2 are opened by the first
switch SW1, that is, in a state where the first resistor R1 is inserted in the first supply circuit 37,
the first unit speaker portion A is The second unit speaker unit B is driven by the drive voltage
divided by the internal resistor and the first resistor R1 and the second resistor R2 is inserted in
the second supply circuit 55. It drives with the drive voltage divided by the resistance and the
second resistance R2, and generates each.
[0071]
FIG. 6 shows the frequency characteristics of the composite speaker unit SP (L). The solid line a
in the figure is that of the first unit speaker unit A for bass, and the broken line b in the same
figure is the second for high tone Of the unit speaker unit B of FIG.
[0072]
On the other hand, in the state where both ends of the first and second resistors R1 and R2 are
short-circuited by the first switch SW1, the first or second unit speaker portion A with the high
drive voltage as it is the audio signal supplied from the outside. B drives and sounds.
[0073]
Therefore, in a state where both ends of the first and second resistors R1 and R2 are opened by
the first switch SW1, the synthetic sound pressure frequency characteristics of the first and
second unit speaker portions A and B are made to be flatter (flat). By configuring only the first
resistor R1 in the shorted state, the bass sound pressure is enhanced if only the first resistor R1
is short-circuited, and the treble sound pressure is enhanced if only the second resistor R2 is
shorted.
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[0074]
By the switching operation of the first switch SW1, it is possible to switch the bass emphasis, the
flat, and the treble emphasis continuously.
[0075]
FIG. 7 shows the frequency characteristics, and the solid line P1 in the figure indicates the
emphasized sound pressure frequency characteristic of the bass range, the broken line P2
indicates the flat sound pressure frequency characteristic, and the dashed dotted line P3
indicates the emphasized high range. Sound pressure frequency characteristics are shown.
[0076]
According to this, in the speaker device for the left channel, in the state where both ends of the
first resistor R1 are short-circuited by the first switch SW1, the characteristic of the bass region
is emphasized, and the first and second resistors R1 and R2 are In the state in which both ends
are open, the state becomes flat, and in the state in which the both ends of the second resistor R2
are shorted, the emphasized characteristic of the high range is obtained.
[0077]
The speaker apparatus for the right channel operates by supplying the audio signal (R) for the
right channel, using the composite speaker unit SP (R) for the right channel and the second
switch SW2.
They are similar in configuration, function and operation to the composite speaker unit SP (L) for
the left channel and the first switch SW1, and have the first and second supply circuits 37, 55,
the first resistor R1 and the first Since the two resistors R2 have the same values and
characteristics, the same reference numerals are given as much as possible.
[0078]
Similar to the first switch SW1, the second switch SW2 has movable contacts T2 similar to the
movable contact T1 and contacts P1, P2, NC, P3 similar to the first switch SW1. By sliding
operation, in the same way as the first switch SW1, there are three positions between the
contacts P1 and P2 (first position), the terminals P2 and NC (second position), and the terminals
P2 and P3 (third position). It is a switch.
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17
[0079]
Moreover, the first and second switches SW1 and SW2 have a two-circuit three-contact switch
(compound switch 71) configuration in which the movable contacts T1 and T2 perform the same
slide operation at the same time by the slide operation from the outside. It has become.
[0080]
Thus, in the speaker device of the present invention for the left and right channels, the bass
enhancement, flat, and high tone enhancement of the reproduced sound (stereo sound) in the left
and right channels are the same and continuous by the operations of the first and second
switches SW1 and SW2. Can be switched.
[0081]
Although the first and second switches SW1 and SW2 may be independent and independent
ones, the configuration of the composite switch 71 is preferable as described above from the
viewpoint of securing the operability of the user.
[0082]
As described above, in the speaker device according to the present invention, by applying the
same audio signal as the first dynamic unit speaker portion A for the low-pitched dynamic type,
the first diaphragm 23 is vibrated by the application of the audio signal to generate the bass. A
composite speaker unit SP which is housed in the same housing (main body) 59 in a state in
which the second diaphragm unit 41 is vibrated to generate a high-pitched sound and the second
unit speaker unit B of the dynamic type for high-pitched L) or SP (R), and the first unit and the
compound speaker SP (L) or SP (R) in which the first and second vibrating films 23 and 41 are
vibrated in the same direction A first resistor R1 inserted and connected in series to the first
supply circuit 37 for supplying the audio signal to the speaker unit A, and a second supply for
supplying the audio signal to the second unit speaker unit B Series in circuit 55 Of the second
resistor R2 inserted and connected to the first resistor R1 and the opening of the first and second
resistors R1 and R2 and the second resistor R2 only. And a first (second) switch SW1 (SW2) to be
switched.
[0083]
Therefore, by switching the first (second) switch SW1 (SW2), it is possible to improve the quality
of the drive sound while maintaining the increase in the drive sound, and to adjust the frequency
characteristics related to the sound pressure, in particular, Emphasis adjustment of low sound
pressure and high sound pressure is possible.
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[0084]
Heretofore, although it has been common to emphasize adjustment of sound pressure by means
of an electronic graphic equalizer or the like, which is difficult to adjust acoustically and requires
a power source, the speaker apparatus of the present invention has a simple combination of
resistance and switch. Can be realized with the following configuration.
[0085]
Furthermore, in the speaker device according to the present invention, although the passive
configuration is a combination of only a resistor and a switch not separately involving a power
supply and an electronic circuit, it is easy to realize bass emphasis (low boost) and treble
emphasis (high boost).
[0086]
FIG. 8 is a perspective view showing the speaker device shown in FIG. 4 in a state of being
commercialized.
In FIG. 8, the first switch SW1 for the left-channel composite speaker unit SP (L) and the second
switch SW2 for the right-channel composite speaker unit SP (R) are operated at one time by an
external operation. As the above-described compound switch 71 which performs switching
operation at three positions, it is housed and configured in the same housing.
[0087]
The composite switch 71 distributes an audio signal for the left channel from the main cable 73
for supplying audio signals for the left and right channels to the composite speaker unit SP (L)
for the left channel, and a distribution cable 73a for the left channel; It is inserted in the middle
of the distribution cable 73b for the right channel that distributes and supplies the audio signal
for the right channel to the composite speaker unit SP (R) for the right channel, and is inserted
near the branch position from the main cable 73.
[0088]
The distribution cable 73a is used as the first and second supply circuits 37 and 55 for the leftchannel composite speaker unit SP (L), and the distribution cable 73b is used for the right-
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channel composite speaker unit SP (R). As the first and second supply circuits 37 and 55.
[0089]
A symbol LO in the composite switch 71 in FIG. 8 indicates a bass emphasis position (first
position), a symbol FLAT indicates a flat position (second position), and a symbol HI indicates a
treble emphasis position (third position). The movable contacts T1 and T2 (not visible in FIG. 8)
by the sliding operation of the knob 75 from the outside by the user.
)をスライドさせる。
[0090]
Reference numeral 77 in FIG. 8 is a plug connected to one end of the main cable 73 and
connected to an audio device (not shown).
[0091]
As described above, in the speaker device according to the present invention, one of the two
pairs of the speaker devices is for the left channel and the other is for the right channel, and the
main cable 73 for supplying the audio signals of the left and right channels and the main cable
73 The left and right channel branch cables 73a and 73b are provided, and the left channel
branch cable 73a forms the first and second supply portions 37 and 55 of the left channel, and
the right channel branch cable 73b And the first and second switches SW1 and SW2 in the left
and right channel speaker devices are configured to perform the same switching operation at one
time by the external operation. It is arranged near the branch position.
[0092]
Therefore, in addition to the effects described above, the first and second switches SW1 and SW2
for the left and right channels are operated at one time by the slide operation of the knob 75, and
the sound pressure emphasis adjustment of the left and right channels is emphasized.
Adjustment is possible at one time.
[0093]
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And in the present invention, the resistance value of the first and second resistors R1 and R2 is
set to a value within 1/2 to 5 times the internal resistance of the first and second unit speaker
parts A and B. For example, it is possible to perform emphasis adjustment within the range of
practical low sound pressure and high sound pressure.
However, a range of about 0.7 to 2 times the internal resistance will be more preferable.
[0094]
In the composite speaker units SP, SP (L), SP (R) used in the present invention, the airtight state
between the first and second unit speaker units A, B is not a complete or strict airtight state, and
vibration frequency characteristics As long as the first and second vibrating films 23 and 41 can
be integrally vibrated, it is possible to form, for example, the small holes and slight gaps
described above. .
[0095]
In the composite speaker units SP, SP (L) and SP (R) used in the present invention, the first and
second unit speaker units A and B need to have the same shape or be arranged coaxially with
each other. However, by forming them in the same shape or arranging them coaxially, it is
possible to further improve the quality of the driving sound by aligning the two characteristics.
[0096]
Further, the composite speaker parts SP, SP (L), SP (R) used in the present invention can be used
for the same common first and second unit speaker parts A, B having different frequency
characteristics. It is difficult to increase costs, and the assembly is simplified.
[0097]
Furthermore, the first and second unit speaker parts A and B in the speaker device according to
the present invention have first and second yokes 21 and 39, first and second magnets 27 and
45, and first and second magnets. The first and second yokes 21 and 39 are not limited to the
configuration formed by the first and second vibrating membranes 23 and 41 and the first and
second coils 35 and 53, and the first and second vibrating membranes supported by these 23,
41, having first and second drive parts 25, 43 for driving the first and second vibrating films 23,
41 by audio signals supported and applied in the first yokes 21, 39. If the configuration is such
that the first and second vibrating films 25 and 43 are driven by the first and second driving
units 25 and 43, the object of the present invention can be achieved.
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[0098]
DESCRIPTION OF SYMBOLS 1 Case body 1a Base 1b Front cover 3 Yoke 5 Vibrating film 7, 63
Sound through tube 9 Drive part 11 Sound through hole 13, 15 Small hole 15 Acoustic filter 17
Drive coil 19 Audio signal source 21 First yoke 23 1st First diaphragm 27 First magnet 29 First
pressure plate 31 First circuit board 33 First support cylinder 35 First coil 37 First supply circuit
(cable) 39 Second film Yoke 41 second vibrating film 43 second drive unit 45 second magnet 47
second pressure plate 49 second circuit board 51 second support cylinder 53 second coil 55
second supply circuit (cable) 57 connecting member 59 housing 61 cover 65 sound through hole
67 ear tip 69 cable 71 composite switch 73 main cable 73 a distribution cable (first supply
circuit) 73 b distribution cable (second supply Circuit) 75 knob 77 plug A first unit speaker
section B second unit speaker section C1, C2 capacitor G ground line NC contact (non-contact)
SP, SP (L), SP (R) composite speaker section SW1 first Switch (composite switch) SW2 second
switch (composite switch) sw1, sw2 switches P1, P2, P3 contacts T1, T2 movable contacts
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