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JP2016012790

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DESCRIPTION JP2016012790
The present invention provides a speaker device which is vertical and has good sound quality
and stable installation. A speaker device 1 includes a first speaker unit 101 installed upward on
the upper surface of a housing 10 whose interior is partitioned into an upper space and a lower
space, and a first speaker unit 101 installed downward on the lower surface of the housing. The
second speaker unit 102 and the first diffuser 22 and the second diffuser 23 provided at
appropriate intervals respectively at the upper and lower portions of the housing. Then, a second
diffuser 23 provided below the housing serves as a base of the speaker device, and has a
mounting surface for supporting the housing on its back surface. It is a vertical type having
speaker units at the top and bottom and space saving, and by providing the first and second
diffusers, omnidirectional sound emission is realized in the horizontal direction while maintaining
the sound quality. [Selected figure] Figure 1
Speaker device
[0001]
The present invention relates to a vertical speaker device.
[0002]
In order to enjoy music and the like with high sound quality, a two-way speaker apparatus having
two speaker units (tweeter, woofer) is preferable to a full-range speaker unit in terms of a
reproducible frequency band.
03-05-2019
1
The two-way speaker generally has two speaker units provided on the front side of the front of a
cabinet as shown in Patent Document 1.
[0003]
On the other hand, there is a demand for installing such a speaker device on a table. However, a
general speaker device is not suitable for being placed at the center of the table because it is
directional. There are problems such as terminals are provided on the back side and the user is
not conscious of design. Moreover, in order to install on a table, it is also required to be small.
Therefore, a compact and vertical nondirectional speaker device is desired.
[0004]
JP-A-11-055780
[0005]
JP, 2009-118182, A
[0006]
JP, 2013-153406, A
[0007]
As a conventional vertical nondirectional speaker device, that is, one in which a speaker is
provided upward or downward, one as shown in Patent Document 2 is proposed.
Further, a subwoofer device for bass as shown in Patent Document 3 has been put to practical
use.
However, the two-way one has not been realized.
03-05-2019
2
[0008]
In addition to being able to emit omnidirectional sound when making a speaker device to be
installed on a table, as described above, being compact, preventing entry of foreign matter, and
ensuring stable installation Conditions such as
Of course, it is also necessary to secure the sound quality.
[0009]
SUMMARY OF THE INVENTION An object of the present invention is to provide a speaker
apparatus which is vertical and has good sound quality and stable installation.
[0010]
A speaker device according to the present invention includes a first speaker unit installed upward
on the upper surface of a case partitioned inside an upper space and a lower space, and a second
speaker unit installed downward on the lower surface of the case And first and second diffusers
provided on the upper and lower sides of the housing, respectively, facing the first and second
speakers at appropriate intervals.
And the said 2nd diffuser provided below the housing | casing becomes a base of a speaker
apparatus, It has a mounting surface which supports a housing | casing on the back surface.
[0011]
In the present invention, the vertical type is provided with the speaker units at the top and the
bottom, which saves space. Although the first and second speaker units are installed upward and
downward, by providing the first and second diffusers facing them, nondirectional sound
emission is generated in the horizontal direction while maintaining the sound quality. Is realized.
In addition, since the first and second speaker units are separated above and below the casing,
the sense of separation of sound is good for the size of the casing. Furthermore, since the lower
second diffuser is a base at the time of installation, there is no need to provide a separate
housing support structure, the configuration is simplified, space is saved, and the degree of
03-05-2019
3
freedom in design is high.
[0012]
In the above invention, the first speaker provided in the upper part may be a high-tone speaker
(tweeter), and the second speaker provided in the lower part may be a bass speaker (woofer).
[0013]
The woofer is large and heavy compared to the tweeter, so by installing it on the lower side, it is
stable even if it is vertical.
Further, since the bass propagates not only in reflection but also in diffraction, it is expected to
propagate well even if the sound is emitted from the lower side.
[0014]
In the above invention, a cover may be provided between the outer periphery of the second
diffuser and the outer periphery of the lower end portion of the housing to allow sound to pass.
[0015]
Since the second diffuser is a base of installation, the heights of the second diffuser and the
installation place (for example, a table) are almost the same, and there is a possibility that foreign
matter may be mixed.
Therefore, this can be prevented by providing a cover. In addition, the degree of freedom also
increases in design because the inside can not be seen.
[0016]
As described above, according to the present invention, it is possible to realize a speaker device
that is vertical and has high sound quality and stability.
03-05-2019
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[0017]
A front view, an internal structure view and a bottom view of a speaker device according to an
embodiment of the present invention An exploded perspective view of the speaker device A
diagram showing a frequency characteristic of a woofer of the speaker device A block diagram of
a circuit of the speaker device
[0018]
A speaker and a head piece to which the present invention is applied will be described with
reference to the drawings.
FIG. 1 is a front view, an internal structural view and a bottom view of a speaker device 1
according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of the speaker device 1.
[0019]
The speaker device 1 of this embodiment has a vertically oriented substantially cylindrical
housing 10, and has two speaker units 101 and 102 disposed on the upper and lower surfaces of
the housing 10. The speaker unit installed on the upper surface is the tweeter 101 which is a
high sound speaker, and the speaker unit installed on the lower surface is the woofer 102 which
is a low frequency speaker.
[0020]
The housing 10 includes an upper housing 11, a lower housing 12, and baffle plates 14 and 15
described later. The lower housing 12 has a large diameter short cylindrical shape. The upper
housing 11 is smaller in diameter than the lower housing 12 and has a flange 11C at its lower
end. The flange 11C engages with the lower housing 12 and is airtightly joined by screws. Upper
case 11 has divider plate 11A inside.
03-05-2019
5
[0021]
A tweeter baffle plate 14 is attached to the upper surface of the upper housing 11 upward. A
tweeter cabinet 111 is configured by a space divided by the tweeter baffle plate 14 and the
partition plate 11A. Further, a woofer baffle plate 15 is attached downward to the lower surface
of the lower housing 12. A woofer cabinet 112 is constituted by the space divided by the woofer
baffle plate 15 and the partition plate 11A. The tweeter 101 is attached upward to the baffle
plate 14 for tweeter. A woofer 102 is attached downward to the woofer baffle plate 15.
[0022]
A bass reflex port 16 is provided on the side of the upper housing 11 on the woofer cabinet 112
side. A bass reflex duct 17 is connected to the bass reflex port 16 toward the inside of the woofer
cabinet 112. The bass reflex duct 17 is bent downward inside the woofer cabinet 112, and has a
length for resonating at a low frequency.
[0023]
The upper housing 11 is covered with a cover 20 at the top and the side. The cover 20 is made of
a metal sheet of punched mesh. Because of the punched mesh, sound and light almost pass
through the cover 20, but a part of the light is reflected and diffused inside the cover 20. The
cover 20 has a side surface and an upper surface, and is in the shape of a tumbler that is turned
upside down. The outer diameter of the cover 20 is substantially the same as that of the lower
housing 12. Therefore, the speaker device 1 covered with the cover 20 has a substantially
cylindrical appearance as a whole.
[0024]
A diffuser 22 is provided inside the upper surface of the cover 20. The diffuser 22 is
substantially conical downward, and reflects the high-pitched sound emitted from the tweeter
101 in all directions.
[0025]
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The woofer baffle plate 15 has three screw holes 15A protruding downward in a pole shape of a
predetermined height. The flat head screw 30 is screwed into the screw hole 15A from the back
surface of the diffuser 23. Due to the height of the screw 30 and the screw hole 15A, the diffuser
23 is provided at a predetermined distance from the woofer 102. The diffuser 23 has a
substantially conical shape upward, and reflects or diffracts mid-bass sound emitted from the
woofer 102 in all directions.
[0026]
FIG. 3 is a diagram showing frequency characteristics of the sound emitted from the woofer 102.
As shown in FIG. One curve is a curve when the diffuser 23 is provided, and the other curve is a
curve when the diffuser 23 is not provided. As shown in the figure, by providing the diffuser 23
so as to face the woofer 102 provided downward, it is possible to expand the reproduction band
beyond the midrange of the sound emitted from the woofer 102. This is considered to be because
mid-bass sound emitted from the woofer 102 is reflected and diffracted by the diffuser 23
without being absorbed by the installation surface (for example, a table cloth or the like).
[0027]
The speaker device 1 is vertically installed with the diffuser 23 as a base, as shown in FIG. That
is, the diffuser 23 doubles as the base of the speaker device 1. For this reason, the cushioning
material 31 is attached to the bottom surface in a ring shape. As a result, there is no need to
provide a separate leg, so the structure can be simplified and the installation area can be
reduced.
[0028]
A cover 32 is provided between the outer periphery of the diffuser 23 and the outer periphery of
the woofer baffle plate 15. The cover 32 is made of a metal thin plate of punched mesh, and
allows the sound emitted from the woofer 102 to pass through, but when the speaker device 1 is
installed on a table or the like, the user's finger or foreign object invades. To prevent.
03-05-2019
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[0029]
An operation panel 40 is provided on the side surface of the lower housing 12. The operation
panel 40 is provided with a switch group 41 such as a power switch for turning on / off the
power of the speaker device 1, a DC jack 42 for connecting an external power source, an audio
jack 43 for inputting an analog audio signal There is.
[0030]
The operation panel 40 is made of resin, but the outer peripheral side surface of the lower
housing 12 other than the operation panel 40 is covered with synthetic leather. The upper
housing 11 is made of resin, and the outer peripheral side surface thereof is mirror-polished by
vapor deposition plating using hot stamp foil.
[0031]
FIG. 4 is a block diagram of an electric circuit of the speaker device 1. The speaker device 1 has a
Bluetooth (registered trademark) communication unit 52 and an analog input unit 53 as a circuit
for inputting an audio signal. The analog input unit 53 includes the audio jack 43 shown in FIG.
An audio signal input from the Bluetooth (registered trademark) communication unit 52 or the
analog input unit 53 is input to the signal processing unit 51. The signal processing unit 51
performs processing such as equalization on the input audio signal, and separates the audio
signal into a high range component and an intermediate low range component. The separated
high frequency component signal is input to the amplification circuit 54. The signal of the midlow range component is input to the amplification circuit 55. The amplification circuit 54 is an
amplification circuit that drives the tweeter 101, and is adjusted to be suitable for the high range.
Further, the amplification circuit 55 is an amplification circuit for driving the woofer 102, and is
adjusted to be suitable for the mid-low range. The amplification circuit 54 inputs the amplified
high-pitched audio signal to the tweeter 101. The tweeter 101 emits this signal as sound. The
amplification circuit 55 inputs the amplified mid-low range audio signal to the woofer 102. The
woofer 102 emits this signal as sound.
[0032]
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The control unit 50 controls the pairing operation of the Bluetooth communication unit 52, the
equalization operation of the signal processing unit 51, the gains of the amplification circuits 54
and 55, and the like. The control unit 50 is configured by a microcomputer. The control unit 50
is further connected to an operation unit 56 and a lighting circuit 57. The operation unit 56
includes various switch groups 41 provided on the operation panel 40, and receives operations
such as power on / off, volume adjustment, and audio input selection by the user. The lighting
circuit 57 is a circuit that lights the LED 58. The LED 58 is an indicator that indicates that the
power is on. When the power is turned on, the control unit 50 supplies power to the audio circuit
and also supplies power to the lighting circuit 57. The lighting circuit 57 lights the LED 58. The
speaker device 1 incorporates a battery (not shown), and operates with an external power supply
supplied from the battery or the DC jack 42.
[0033]
As described above, in the speaker device 1 according to the present embodiment, by adopting
the vertical two-way speaker configuration, it is possible to realize reproduction of a wide
frequency band while saving space. Further, the tweeter 101 is installed upward at the upper end
of the housing 10, and the woofer 102 is installed downward at the lower end of the housing 10.
While being able to comprise, it can improve the sense of separation of the high range and the
mid-low range and realize sound reproduction with a wide sense. In addition, the speaker
apparatus 1 is not limited to the shape demonstrated above. Modifications are free within the
scope of the present invention.
[0034]
Reference Signs List 10 housing 11 upper housing 12 lower housing 22 (first) diffuser 23
(second) diffuser 31 cushion material 101 tweeter 102 woofer
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