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JP2017183967

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DESCRIPTION JP2017183967
Abstract: The present invention provides a speaker which can select the shape more freely
without any restriction of the outer shape and without providing a hole, and can emphasize the
mid-range sound range where the resonance effect is large. A speaker (1) is characterized by
including a resonator (10) having a hollow portion (12) and a sound source (20) removably
attached to the outside of the hollow portion (12) of the resonator (10). The resonator 10 may be
formed in a donut shape. The sound source 20 may be a vibration speaker, and the vibrating
portion 21 may be in contact with the contact surface 15 of the sound source chamber 13.
[Selected figure] Figure 3
スピーカ
[0001]
The present invention relates to a speaker.
[0002]
Conventionally, a speaker is generally composed of a magnet, a coil, and a diaphragm, and is
assembled in a housing called an enclosure (see, for example, Patent Document 1).
[0003]
Patent Document 1 relates to a speaker system in high-fidelity three-dimensional sound field
reproduction, and in particular provides a speaker system with an enclosure (chassis) having a
pleasant acoustic effect, and the whole of the housing is made of wood. It consists of a cube, and
one speaker unit is mounted on the front, the rear is the full opening and the front half of the
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total volume is the air chamber, and the remaining rear is half from the acoustic filter made of
cardboard. Discloses an enclosure.
[0004]
However, in the speaker unit as described in Patent Document 1, there is a restriction on the
shape, for example, the front surface of the speaker unit needs to be made to be net-like and
porous in order to make sound.
In addition, there is a problem that the user does not get tired of listening, does not disturb the
conversation, and can not necessarily provide a tone suitable for BGM.
[0005]
JP, 2016-1861, A
[0006]
The present invention has been made based on such circumstances, and the purpose thereof is to
be able to select the shape more freely, with less restriction of the outer shape, and without the
need of providing a hole, and of the resonance effect It is to provide a speaker capable of
emphasizing a large mid range.
[0007]
The present invention is grasped by the following composition.
(1) A first aspect of the present invention is a loudspeaker, comprising a hollow resonator and a
sound source removably mounted in a sound source chamber provided in the hollow of the
resonator. It is characterized by
[0008]
(2) In the configuration of the above (1), the resonator may be formed in a donut shape.
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[0009]
(3) In the configuration of the above (1) or (2), the resonator may be formed of an ABS resin.
[0010]
(4) In any one of the configurations (1) to (3), the sound source may be a vibration speaker, and
the vibration portion may be in contact with the contact surface of the sound source room.
[0011]
According to the present invention, it is possible to provide a speaker capable of selecting the
shape more freely without being restricted by the outer shape and having to provide a hole, and
emphasizing the mid-range sound range where the resonance effect is large. .
[0012]
It is a figure which shows the state which hung the speaker which concerns on embodiment of
this invention on the wall surface in a room.
It is a speaker concerning an embodiment of the present invention, and is a perspective view
seen from the back.
Similarly, it is the disassembled perspective view seen from the back.
Similarly, it is a front view.
Similarly, it is a rear view.
Similarly, it is a plan view.
Similarly, it is a bottom view.
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Similarly, it is a right side view. Similarly, it is sectional drawing in the AA of FIG. Similarly, it is
sectional drawing in the CC line of FIG. Similarly, it is a cross-sectional view taken along the line
D-D in FIG. It is a figure which shows typically the manufacturing method of the resonance body
which comprises a speaker. It is a graph which shows an acoustic effect as Example 1. FIG. It is a
graph which shows an acoustic effect as a reference example 1. It is a graph which shows an
acoustic effect as a reference example 2. It is a graph which shows an acoustic effect as a
reference example 3.
[0013]
Hereinafter, with reference to the accompanying drawings, modes (hereinafter, embodiments) for
carrying out the present invention will be described in detail.
[0014]
(Speaker Configuration) The speaker 1 according to this embodiment has a toroidal ring shape.
For example, as shown in FIG. 1, the speaker 1 is hung on the wall of the room R and the sofa S is
seated. It is suitable for relaxing and listening to BGM while blocking the sunshine with the
window W which has been brightened softly with a blinder.
The sounds and music from the seemingly non-speaker-like shape gently envelop people.
Hereinafter, the speaker 1 will be described in detail.
[0015]
FIG.2 and FIG.3 has shown the perspective view and the disassembled perspective view which
saw the speaker 1 from the back, respectively. The speaker 1 includes a resonator 10 having a
hollow portion 12 and a sound source 20 removably attached to the outside of the hollow
portion 12 of the resonator 10.
[0016]
The resonator 10 is a hollow molded body formed by blow molding, and is composed of an outer
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shell 11 and a hollow portion 12 covered with the outer shell 11. As a raw material, for example,
an ABS resin can be suitably used from the convenience of handling, the echo of a sound, etc. The
resonator 10 may be formed with various shapes and sizes, but in the present embodiment, an
example formed into a donut shape is shown. As the size, for example, the outer diameter may be
about 40 cm, the inner diameter may be about 15 cm, and the ring diameter may be about 12
cm.
[0017]
The resonator 10 is provided with a sound source chamber 13 formed by partitioning a part of
the hollow portion 12. In the sound source chamber 13, the sound source 20 is accommodated
and detachably attached. The position at which the sound source chamber 13 is provided is not
particularly limited as long as it is the space of the hollow portion 12. For example, for
convenience of weight balance and ease of use when hanging on a wall, and replacement of the
sound source 20, etc. It is convenient to provide in the hollow portion 12 which becomes the
lower part of the resonator 10 when it is hung.
[0018]
As shown in FIG. 1, the sound source chamber 13 is covered with a lid 14 to protect the attached
sound source 20 (see FIG. 2). The lid member 14 is engaged with the sound source chamber 13
by the engaging member 14a, and the opening 14b is provided for convenience when attaching
and detaching. Above the opening 14b, a display unit 14c for displaying the volume of the sound
source 20 inside is provided.
[0019]
In addition to the sound source chamber 13, a spacer 11a for securing a gap when the resonator
10 is hung on the wall is provided on the back of the outer shell 11 of the resonator 10, and is
attached to the wall by the wall hook 11b. Can be hooked on the hook that is The spacer 11a is
formed of, for example, a resin having a buffer action. In addition, sectional drawing of the spacer
11a is shown as FIG. 10 as a CC sectional view taken on the line of FIG.
[0020]
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As shown in FIG. 2, the sound source chamber 13 is formed so as to be recessed in the hollow
portion 12 of the resonator 10, and the contact surface 15 on the far side abuts on the sound
source 20. Although a vibration speaker can be suitably used as the sound source 20 as
described later, the sound source 20 is attached in the sound source room 13 so that the
vibrating portion 21 of the sound source 20 firmly abuts on the contact surface 15. Then, the
engaging member 14 a of the lid member 14 engages with the engaged member 13 a of the
sound source chamber 13.
[0021]
The contact surface 15 of the sound source chamber 13 has a shape, for example, a planar shape
suitable for converting the vibration of the vibrating portion 21 of the sound source 20 into a
sound. The sound emitted from the contact surface 15 changes depending on its thickness and
area, but the range of the sound flowing out of the speaker 1 by setting the thickness and area of
the contact surface 15 in consideration of the place where the speaker 1 is installed, etc.
Frequency) can be adjusted. This point will be described later as an example.
[0022]
Here, the appearance of the speaker 1 will be described again. 4 to 8 show a front view, a rear
view, a plan view, a bottom view and a right side view (the left side view appears symmetrically)
of the speaker 1, respectively, and the speaker 1 has a toroidal circle here. It has an annular
shape. However, as shown in FIG. 6 to FIG. 8, the back surface on the side to be hung on the wall
is formed flatter than the front surface in plan view, bottom view and side view, and as described
above A spacer 11a is provided to secure a gap between the two. As shown in FIG. 7, the switch
14d of the sound source 20 and a lamp 14e indicating ON / OFF are provided on the upper
bottom surface of the opening 14b of the lid 14 of the sound source chamber 13.
[0023]
Next, the positional relationship between the resonator 10 and the sound source 20 will be
described with reference to FIGS. 9 and 11. The sound source chamber 13 is formed so as to be
recessed in the hollow portion 12, and the vibrating portion 21 of the sound source 20 is in
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contact with the contact surface 15 on the back side. The sound source 20 is pressed by the lid
member 14 so that the contact surface 15 on the back side and the vibrating portion 21 of the
sound source 20 abut against each other. Even if a shock absorbing material is interposed
between a portion other than the vibrating portion 21 and a wall surface other than the contact
surface 15 of the sound source chamber 13 so that the portion other than the vibrating portion
21 of the sound source 20 does not transmit unnecessary vibration to the resonance body 10
Good.
[0024]
The sound emitted by the vibration of the contact surface 15 vibrated by the vibrating portion 21
of the sound source 20 resonates in the hollow portion 12 of the resonator 10 and spreads. At
the same time, the shell 11 itself vibrates and emits a sound to the outside. The hollow portion
12 has a shape suitable for internally resonating the sound emitted from the contact surface 15,
and has a function of adjusting the sound to be comfortable to hear and a shape suitable for
spreading the sound. I am Actually, when listening to the sound from the speaker 1 according to
the present embodiment, the sound seems to be heard from the center space which is supposed
to have nothing in the shape of a donut, and it is possible to feel a strange and incomprehensible
kind of sound. .
[0025]
In the present embodiment, a vibration speaker can be suitably used as the sound source 20. A
conventional speaker mainly comprises a coil, a permanent magnet, and a diaphragm (cone
sheet), and when an alternating current based on an audio signal flows in the coil, it becomes an
electromagnet and attracts attention with the permanent magnet. , Repulsion occurs. As a result,
the coil vibrates in the front-rear direction, and the diaphragm directly connected to the coil
vibrates to emit a sound.
[0026]
Furthermore, conventional speakers are assembled into a housing called an enclosure. The sound
has the property (diffraction) that it wraps around the back of the obstacle, which becomes more
pronounced in the lower tones. When the speaker is used in the exposed state, the bass coming
out of the back gets around in front and cancels out, and the bass becomes smaller. Therefore, by
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attaching a speaker to the enclosure, the sound coming from the back is shut off, and it is
adjusted so that the low temperature comes out. In addition, in order to make sound, the front of
the speaker needs to be in a mesh-like / porous state.
[0027]
On the other hand, the vibration speaker is not provided with a specific diaphragm such as cone
paper, and has a structure in which the vibration is not converted into sound by itself. Then,
when the exposed vibrating portion 21 is brought into direct contact with, for example, a house
wall, a floor, or other resonating object such as a ceiling or a flower of a car, the vibration is
transmitted to these to emit a sound. In other words, the vibration speaker is a speaker having a
diaphragm outside the speaker system.
[0028]
As described above, the vibration speaker is attached as the sound source 20 to the sound source
chamber 13 provided by dividing a part of the hollow portion 12 of the resonator 10. And the
vibration part 21 of a vibration speaker vibrates the contact surface 15 of the sound source room
13. Then, the portion corresponding to the diaphragm of the conventional speaker becomes the
hollow portion 12 of the resonator 10 and a sound is emitted. Furthermore, the outer shell 11
itself of the resonator 10 also vibrates to emit a sound. Since a sound is emitted by such a
mechanism, the shape of the outer shell 11 of the resonator 10 is less restricted in shape, and
there is no need to provide a hole as in a general enclosure, and the shape can be selected more
freely.
[0029]
The speaker 1 according to the present embodiment can resonate the sound in the hollow
portion 12 of the resonator 10, thereby reducing the sound in the high range and the low range
and amplifying the sound in the middle range. As a result, it does not get tired of listening, does
not disturb a conversation, and becomes a tone suitable for BGM. The speaker 1 may be wired or
wireless depending on the mode of the vibration speaker (sound source 20). If it is wireless, the
cordless speaker 1 can maximize the height of the design even as an interior not only as an
acoustic device but also as an interior as shown in FIG.
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[0030]
As described above, in the present embodiment, in the sound source chamber 13 which is a
hollow provided with the vibration speaker (sound source 20) so as to enter the doughnutshaped hollow portion 12, the sound source chamber 13 which becomes the outer wall when
viewed from the hollow portion 12. Contact with the contact surface 15 of the In the process of
researching the present invention, a hollow cube part protruding outward from a doughnutshaped hollow part was considered, and a mode in which the vibration speaker was attached to
the inner wall was also considered. It is found that the resonance effect is limited due to the cube
part protruding from the. In this embodiment, since the vibration portion 21 of the vibration
speaker as the sound source 20 is positioned in the hollow portion 12, the sound can be easily
guided into the hollow portion 12, and a large resonance effect can be obtained. Further, also in
terms of manufacture, as compared with the aspect in which the vibration speaker is attached to
the inside, the aspect incorporated from the outside as in this embodiment can facilitate the
manufacture.
[0031]
(Method of Manufacturing Speaker) The speaker 1 according to this embodiment is
manufactured by attaching the vibration speaker as the sound source 20 to the sound source
chamber 13 after the resonator 10 is molded by blow molding. Below, the process of blowmolding the resonator 10 will be described with reference to FIG.
[0032]
First, as shown in FIG. 12A, the divided dies 100a and 100b are prepared in a donut shape so
that the cavities 101a and 101b correspond to the resonators 10, respectively. Above the split
mold, a head 200 connected to an extrusion device (not shown) for extruding the parison P is
provided. Next, as shown in FIG. 12B, the parison P is pushed out of the head 200 between the
divided molds 100a and 100b. The parison P may be in the form of a pair of sheets or may be
cylindrical.
[0033]
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When the parison P reaches a predetermined position, as shown in FIG. 12C, the split molds
100a and 100b are clamped, and air is blown into the parison P. The resonator 10 which is a
hollow molded body is thereby molded. When the cooling is completed, as shown in FIG. 12D, the
split molds 100a and 100b are opened, and the resonator 10 is taken out. After removal, the
burrs B located above, below, and in the middle of the resonator 10 are cut to obtain the
resonator 10. The deburring is done carefully because the resonator 10 is used as a speaker.
[0034]
EXAMPLE The acoustic effect of the present embodiment will be described using Example 1 and
Reference Examples 1 to 3. Sound effects are five in the low range (20 Hz to 200 Hz), middle low
range (200 Hz to 600 Hz), middle range (600 to 3 kHz), high range (3 kHz to 10 kHz), and ultra
high range (more than 10 kHz) And the volume of each example was measured. The software
used is WabeSpectra, and in FIG. 13 to FIG. 16, the vertical axis indicates volume (dB) and the
horizontal axis indicates frequency (Hz).
[0035]
Example 1 is obtained by measuring a prototype (the contact surface 15 has a thickness of 1.2
mm and a diameter of 200 mm) according to the above-described embodiment. The
measurement results are shown in FIG. When this is seen, the high range and the ultra-high
range are narrowed down remarkably, and the mid range and the mid-low range close to the mid
range are emphasized.
[0036]
In the reference example 1, the vibration portion of the vibration speaker used in the example 1
is brought into contact with a resin plate (thickness 1.2 mm, diameter 200 mm), and the acoustic
effect is measured. The measurement results are shown in FIG. Looking at this, the mid-range
range is emphasized, but the high range and the ultra-high range are larger than those of the first
embodiment.
[0037]
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In Reference Example 2, the acoustic effect was measured by changing the resin plate of
Reference Example 1 to a resin plate having a thickness of 1.2 mm and a diameter of 70 mm. The
measurement results are shown in FIG. As seen from this, the mid-range sound range is smaller
than that of Example 1 and Reference Example 1, and the high frequency range and the super
high range are larger than those of Example 1.
[0038]
The reference example 3 measures the sound emitted from the speaker of the smartphone widely
distributed in the market. The measurement results are shown in FIG. As seen from this, the midrange sound range is substantially the same as that of the first embodiment, but the high and
ultra high frequencies are larger than those of the first embodiment.
[0039]
The first embodiment is considered to suppress the high frequency range and the ultra high
frequency range by the resonance effect of the hollow portion 12 of the resonance body 10 in
the first and second embodiments. In addition, Reference Example 3 has a large volume in a wide
range from mid to high and ultra high, which is considered to satisfy the application, and
Example 1 has high and ultra high. It was confirmed that the volume of the mid range was mainly
suppressed. As described above, according to the speaker of the first embodiment, it is possible
to obtain a soft sound that does not interfere with conversation, reading, and the like.
[0040]
Although the present invention has been described above using the embodiment, it goes without
saying that the technical scope of the present invention is not limited to the scope described in
the above embodiment. It will be apparent to those skilled in the art that various changes or
modifications can be added to the above embodiment. It is also apparent from the scope of the
claims that the embodiments added with such alterations or improvements can be included in the
technical scope of the present invention. For example, although the above embodiment has
described the case of obtaining the resonator 10 by blow molding, the resonator 10 is obtained
by bonding a pair of molded bodies (front side and back side) obtained by injection molding. It is
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also good.
[0041]
DESCRIPTION OF SYMBOLS 1 ... Speaker 10 ... Resonant body 11 ... Outer shell 12 ... Hollow part
13 ... Sound source room 14 ... Lid material 15 ... Contact surface 20 ... Sound source (vibration
speaker) 21 ... Vibration part
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