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JPH09298796

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPH09298796
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker system applied to audio equipment, television and the like, and in particular, to enhance
bass characteristics by amplifying bass in sound waves radiated to the rear of the speaker.
Related to the speaker system.
[0002]
2. Description of the Related Art In general, a cone speaker is most frequently used as a speaker
for converting an electric signal to a sound wave signal and radiating it into free space, but such
a cone speaker is used between the central pillar and the yoke. When a strong cylindrical
magnetic field is generated from the positioned magnet, a force is applied as the signal current
flows to the voice coil installed in the magnetic field, and this force is a conical vibration made of
paper or the like The plate is vibrated thereby emitting sound waves.
[0003]
At this time, since the generated force is constant regardless of frequency, flat frequency
characteristics can be obtained over a fairly wide frequency range, but in this case the low band
is equivalent to include the mass of radiation. It is the lowest resonance frequency defined as
compliance by mass and edge, damper, etc., and its high region is limited by the divided vibration
due to the limit of elasticity of cone paper.
[0004]
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And since the divided vibration can obtain a high frequency by reducing the diameter of the cone
paper, in an actual speaker system, speakers having different diameters as the same structure to
emit sound waves in a wider frequency range In appropriate combination.
Also, the radiation in the lower region is affected by the size of the cabinet used outside the
lowest resonance frequency, etc. This is because when the cone paper vibrates and emits sound
waves, the front of the cone paper It is not emitted well in the low region by the phenomenon of
canceling each other by being in antiphase behind.
[0005]
Therefore, in order to obtain low-range sound waves, it is necessary to increase the size of the
cabinet to a certain extent, but this has limitations when applied to compact audio devices and
acoustic devices such as televisions. .
A speaker system for obtaining low-range sound waves without changing the size of the cabinet
significantly is disclosed in Korean Patent Publication No. 92-5066.
[0006]
As shown in FIG. 1, this is a speaker 2 fixed inside the speaker housing 1 and having a diaphragm
2a for converting electrical energy into sound energy, and a sound wave generated by the
vibration of the diaphragm 2a. A sound collecting device 3 to make sound, a waveguide 4 for
transmitting a sound wave collected by the sound collecting device 3 by a certain distance, and a
horn 5 for radiating and expanding the sound wave output from the waveguide 4 And a tube 6
having an opening of the same inner diameter as the maximum diameter of the diaphragm 2a is
attached to the frame of the speaker 2 so that the sound collector 3 and the waveguide 4 are
integrated. The horn 5 is attached to the opening on the other side of the tube 6.
[0007]
Further, in FIG. 2, the sound from the horn 5 is radiated in parallel to the front space so that the
tube 6 forming the waveguide 4 is parallel to the central axis of the movable coil.
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Therefore, the sound waves generated by the vibration of the diaphragm 2a are emitted to the
front side of the speaker housing 1 and also to the back side thereof, and all the sound waves
emitted to the back side are the sound collector 3 and the waveguide The light is amplified in the
tube 6 through the tube 4 and then emitted to the front side of the speaker housing 1 through
the horn 5.
[0008]
However, in the conventional speaker system configured as described above, it is possible to
some extent to amplify a part of the bass in the sound wave emitted to the rear of the speaker.
Not only is the bass, especially the super bass not amplified for the desired amount by the loud
interference phenomena between the sounds behind, by all the sound waves radiated to the back
of the speaker being transmitted through the waveguide and the horn There have been various
problems such as the sharpness of the sound being significantly reduced due to distortion of the
sound wave.
[0009]
In addition, the size of the waveguide and the horn is increased by collecting all of the sound
waves emitted from the rear of the speaker, and thereby the size of the speaker housing is
increased, thereby reducing the size of the compact audio device or television. There are also
problems such as being difficult to apply to John.
And, if an integral mold is manufactured at the time of manufacturing a geometrically formed
tube, there is an inherent problem that it acts as one factor that increases the size of the mold
and increases the manufacturing cost. The
[0010]
The present invention has been proposed to solve the problems of the prior art as described
above, and its object is to collect and then amplify only a part of the sound wave emitted behind
the speaker. It is an object of the present invention to provide a speaker system which can
increase the efficiency of amplification, especially of bass, and obtain clearer sound by emitting.
Another object of the present invention is to provide a short, light and thin speaker system that
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can be applied to compact audio equipment, television and the like.
[0011]
Still another object of the present invention is to provide a speaker system that is separably
coupled to a sound wave amplification horn that amplifies sound waves so that its manufacture is
easy and its manufacturing cost can be reduced.
[0012]
SUMMARY OF THE INVENTION In order to achieve the above object, the present invention
comprises a speaker having a cone for converting an electrical signal into a sound signal, and a
plurality of sound emitting holes mounted on the back side of the speaker. And a sound wave
amplification horn configured to amplify and emit only a part of the sound wave emitted to the
back side of the frame.
[0013]
The sound wave amplification horn according to the present invention preferably collects and
amplifies sound waves emitted from at least one or more of the plurality of sound wave emission
holes.
The sound wave amplification horn is characterized by comprising a large number of sound
collection units for collecting the sound radiated to the sound wave emission hole, and an
amplification unit for amplifying the sound wave collected by the sound collection unit. I assume.
[0014]
More preferably, the sum of the diameters of the sound collecting portions is substantially equal
to the minimum diameter of the amplification portion.
Also, the sound wave amplification horn according to the present invention includes a first
amplification member having an amplification portion whose one side is opened and the
diameter is gradually enlarged, and a second amplification member that is separably coupled to
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the first amplification member. It is characterized by being equipped.
[0015]
The sound wave amplification horn is provided with a radiation horn which is extended at the
end of the sound wave horn and emits the sound wave amplified by the amplification unit. The
first amplification member includes a sound collecting unit that collects only a part of the sound
wave emitted to the sound wave emitting hole of the frame. Also, the first amplification member
has a large number of locking grooves on both sides thereof, and the second amplification
member has a large number of locking protrusions inserted into the locking groove.
[0016]
The first amplification member has a plurality of guide holes on both sides thereof, and the
second amplification member has a plurality of guide pins inserted into the guide holes.
Preferably, at least one of the first and second amplification members comprises an elastic piece
into which a wire is inserted. Therefore, according to the present invention, the generation of the
reflected wave and the standing wave in the acoustic wave amplification horn is prevented by
collecting and amplifying only a part of the acoustic wave radiated from the rear of the speaker,
and in particular the bass The efficiency of amplification can be increased and clear sound can be
obtained, and in particular, it can be applied to compact audio devices and televisions, etc., whose
speaker is easy to design.
[0017]
The present invention will be described in more detail with reference to the accompanying
drawings. 3 and 4 show an embodiment of the speaker system according to the present
invention, FIG. 3 is a schematic perspective view of the speaker system, and FIG. 4 is a cutaway
sectional view of a part of the speaker system.
[0018]
In the same figure, a speaker 12 is attached to the inside of the front of the cabinet 10. The
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speaker 12 has a frame 14 provided with a large number of sound wave emission holes 14a
connected to the back side, a cone paper 16 attached to the inside of the frame 14, and a magnet
18 fixed on the back side of the frame 14 And. A sound wave amplification horn 20 for collecting
and amplifying only a part of the sound waves radiated through the large number of sound wave
emission holes 14a is fixed on the back side of the frame 14.
[0019]
The sound wave amplification horn 20 is provided with sound collecting portions 22a and 22b
for collecting sound waves radiated to at least two of the sound wave emission holes 14a in the
four sound wave emission holes 14a, and the sound collection portions 22a and 22b. The
amplification unit 24 amplifies the incoming sound wave and radiates it to the outside of the
cabinet 10. Most preferably, the diameter of the amplification unit 24 is gradually increased as it
goes to the end side so that the collected sound waves are easily amplified. The minimum
diameter D of the amplification unit 24 may be equal to the sum of the diameters d of the sound
collecting units 22a and 22b.
[0020]
The number of the sound collecting portions 22a and 22b formed at the tip of the sound wave
amplification horn 20 is two as shown in FIGS. 3 and 4, that is, the number of the sound emission
holes 14a formed in the frame 14 It is not limited to being formed in half of the number of, but it
is formed in one piece of one quarter of the number or three pieces of which is three quarters as
shown in FIG. Of course, it can be amplified by sound.
[0021]
The sound collecting portions 22a and 22b close the sound emitting holes 14a in order to
prevent noise from being generated due to the vibration of the sound waves emitted from the
speakers 12 on the rear surface side of the frame 14 And the other end is fixed to the inner
surface of the cabinet 10.
On the other hand, an echo port 26 is formed on the front surface of the cabinet 10 for emitting
sound waves not collected by the sound wave amplification horn 20.
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[0022]
In the speaker system according to the present invention thus configured, when the cone paper
16 is vibrated by the strong cylindrical magnetic field generated from the magnet 18 to generate
a sound wave, this sound wave is transmitted to the front side of the speaker 12 As it is emitted,
radiation is also performed on the back side. Then, a part of the sound wave radiated to the back
side of the speaker 12 is radiated to the inside of the cabinet 10 through the plurality of sound
wave emission holes 14 a formed in the frame 14.
[0023]
At this time, a part of the sound wave radiated through the plurality of sound wave emission
holes 14 a on the back side of the cone paper 16 is introduced into the inside of the sound wave
amplification horn 20 and then amplified to the front side of the cabinet 10. It is emitted. That is,
a part of the sound wave radiated through the sound wave emission hole 14a passes through the
amplification part 24 whose diameter is gradually enlarged after being collected in each of the
sound collection parts 22a and 22b. While being sufficiently amplified and radiated to the front
side of the cabinet 10. At this time, the sound wave radiated through the sound wave
amplification horn 20 is enhanced in sound amplification efficiency, particularly to enhance the
sound amplification efficiency.
[0024]
In addition, the amplification unit 24 formed to have the same minimum diameter D as the sum
of the diameters d of the sound collection units 22a and 22b flows into the amplification unit 24
from the sound collection units 22a and 22b. The sound waves do not generate sound waves
returning to the side of the speaker 12 due to interference or reflection between the sound
waves. As a result, it is possible to prevent re-vibration or interference of the cone paper 16 due
to a reflected wave or the like and at the same time prevent the occurrence of interference due to
a standing wave.
[0025]
The sound wave not introduced into the sound wave amplification horn 20 is reflected in the
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cabinet 10 and emitted again to the front side through the echo port 26, thereby preventing
distortion of the sound wave by interference and preventing sound The definition can be further
improved. In particular, as shown in FIG. 6, the frequency of the low band is significantly
amplified conventionally by collecting and amplifying only a part of the sound wave radiated to
the back side of the speaker 12 I understand.
[0026]
7 to 10 show yet another embodiment of the speaker system according to the present invention.
FIG. 7 is an exploded perspective view of the speaker system, and FIG. 8 is a cross-sectional view
of the coupling of the speaker system. In the figure, on the back side of the speaker 12 mounted
on the inner side surface of the cabinet 10, only a part of the sound wave radiated through the
many sound wave emission holes 14a formed on the back side of the frame 14 is collected and
amplified. The sound wave amplification horn 200 is attached.
[0027]
The sound amplification horn 200 is formed with an opening at one side, and a first amplification
member 220 for collecting and amplifying only a part of sound waves radiated to the back side
of the speaker 12; A second amplification member 240 is detachably coupled to the opening of
the amplification member 220. The first amplification member 220 has a mounting portion 220a
fastened to the back side of the frame 14 and a part of the sound waves radiated through a
plurality of sound wave emission holes 14a formed on the back side of the frame 14 A sound
collection unit 220b for collecting the sound, an amplification unit 220c whose diameter is
gradually enlarged so as to amplify the sound wave introduced through the sound collection unit
220b, and a large number formed on both sides of the amplification unit 220c The locking
groove 220d and the guide hole 220e, and the cutout 220f for emitting the sound wave not
collected by the sound collecting part 220b.
[0028]
The second amplification member 240 is formed in substantially the same shape as the first
amplification member 220, and is inserted into and coupled to the locking groove 220d on both
sides thereof as shown in FIGS. A plurality of locking projections 240a for maintaining the state
of (1) and a plurality of guide pins 240b inserted into the guide holes 220e are provided in a
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protruding manner. Further, an elastic piece 240 c is provided on the second amplification
member 240 so as to fix a wire such as an electric wire.
[0029]
Meanwhile, at the end of the sound wave amplification horn 200 to which the first and second
amplification members 220 and 240 are coupled, the sound wave introduced through the sound
collection unit 220b is amplified by the amplification unit 220c, and then the cabinet 10 is
obtained. The radiation horn 260 which radiates to the front side of is extended. In the speaker
system according to the embodiment configured as described above, when the cone paper 16 is
vibrated by the strong cylindrical magnetic field generated from the magnet 18 to generate a
sound wave, the sound wave is generated on the front surface of the speaker 12 It is emitted to
the side and also to the back side.
[0030]
Then, a part of the sound waves radiated to the back side of the speaker 12 is radiated to the
inside of the cabinet 10 through the plurality of sound wave emission holes 14 a formed in the
frame 14. At this time, a part of the sound wave radiated through the sound wave emission hole
14 a on the back side of the cone paper 16 is sufficiently amplified while passing through the
inside of the sound wave amplification horn 200, and then the front side of the cabinet 10
Emitted to
[0031]
That is, a part of the sound wave emitted through the sound wave emission hole 14a is collected
through the sound collection unit 220b and then sufficiently amplified while passing through the
amplification unit 220c. Are radiated to the front side of the cabinet 10 through the Therefore,
the sound wave diameter collected through the sound collection unit 220b is amplified
sufficiently in the amplification unit 220c where it is gradually enlarged and then emitted
through the radiation horn 260, thereby generating an ultra-low frequency sound. The efficiency
of amplification is increased, which can prevent distortion due to sound wave interference and
improve sound definition.
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[0032]
Meanwhile, the plurality of locking protrusions 240 a and the guide pins 240 b formed on the
second amplification member 240 are inserted into the plurality of locking grooves 220 d and
the guide holes 220 e formed on the first amplification member 220. Thus, the first and second
amplification members 220 and 240 are combined to make assembly and separation very
convenient. Further, the mold can be miniaturized by separately manufacturing the sound wave
amplification horn 200 as the first and second amplification members 220 and 240, thereby
reducing the manufacturing cost.
[0033]
Further, by collecting and amplifying only a part of the sound wave radiated to the back side of
the speaker 12, the size of the sound wave amplification horn 200 is miniaturized, which is
useful for compact audio equipment, television and the like. Applicable to
[0034]
Therefore, as described above, according to the present invention, the reflected wave and
standing wave in the acoustic wave amplification horn are collected by collecting and amplifying
only a part of the acoustic wave radiated to the back side of the speaker. In particular, it is
possible to prevent generation and increase the efficiency of amplification of super bass, in
particular, to obtain clear sound, and in particular, it is easy to design and manufacture the
speaker, and it can be miniaturized so that compact audio equipment and television can be
obtained. There are various effects such as application of the invention, and formation of the
sound wave amplification horn so as to be separated and combined, which significantly reduces
the manufacturing cost and facilitates the assembly.
[0035]
Brief description of the drawings
[0036]
1 is a cross-sectional view showing an example of a conventional speaker system.
[0037]
2 is a cross-sectional view showing another example of a conventional speaker system.
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[0038]
3 is a schematic perspective view showing a speaker system according to one embodiment of the
present invention.
[0039]
4 is a partially cutaway sectional view of FIG.
[0040]
5 is a schematic perspective view showing another embodiment of the present invention.
[0041]
6 is a graph showing the characteristics of the frequency of the speaker system according to the
present invention in comparison with the prior art.
[0042]
7 is an exploded perspective view showing still another embodiment of the speaker system
according to the present invention.
[0043]
8 is a combined sectional view of FIG.
[0044]
9 is a cross-sectional view taken along the line I-I of FIG.
[0045]
10 is a cross-sectional view taken along the line II-II in FIG.
[0046]
Explanation of sign
[0047]
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DESCRIPTION OF SYMBOLS 10 cabinet 12 speaker 14 frame 14a sound wave radiation hole 16
cone paper 20, 200 sound wave amplification horn 22a, 22b, 220b sound collection part 24,
220c amplification part 26 echo port 220 1st amplification member 220d locking groove 220e
guide hole 240 2nd Amplification member 240a Locking projection 240b Guide pin 260
Radiation horn
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