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DESCRIPTION JP2017228879

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DESCRIPTION JP2017228879
Abstract: Disclosed is a technology capable of controlling degradation of sound reaching a user's
ear from a portable terminal through a portable terminal acoustic body. An acoustic body for a
portable terminal is an acoustic body for a portable terminal, comprising an artificial marbleforming body formed of artificial marble, and a surface of the artificial marble-forming body has
a first opening and a second opening. Is formed, and in the interior of the artificial marble
former, a through passage penetrating from the first opening to the second opening is formed.
[Selected figure] Figure 2
Acoustics for mobile terminals, system kitchens, and furniture
[0001]
The technology disclosed herein relates to a mobile terminal acoustic body.
[0002]
Generally, for example, since the volume of a speaker built in a portable terminal such as a
smartphone is small, a sound output from a speaker of the portable terminal (hereinafter,
referred to as "sound from portable terminal") is hard to be heard by the user's ear.
Then, the acoustic body for portable terminals is known (for example, refer to patent documents
1).
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[0003]
The mobile terminal acoustic body is made of, for example, hard polyvinyl chloride or the like. A
telephone stand, a sound source intake port, and a sound source output port are formed on the
surface of the mobile terminal acoustic body, and penetrate from the sound source intake port to
the sound source output port inside the mobile terminal acoustic body. A through passage is
formed. According to such a mobile terminal acoustic body, the sound from the mobile terminal
held by the telephone stand is taken into the inside of the mobile terminal acoustic body through
the sound source intake port and passes through the through path. Since the volume of the
sound output from the sound source output port is increased, it can be easily heard by the user's
ear positioned on the side facing the sound source output port.
[0004]
JP, 2005-184050, A
[0005]
The above-mentioned conventional portable terminal acoustic body is made of an extremely hard
material such as hard polyvinyl chloride, so when the sound from the portable terminal passes
through the through path, the portable terminal acoustic body has a natural frequency. By
vibrating, the quality of the sound that reaches the user's ear from the portable terminal via the
portable terminal acoustic body may be degraded.
[0006]
The present specification discloses a technology that can solve the above-described problems.
[0007]
(1) The acoustic terminal for a portable terminal disclosed in the present specification includes
an artificial marble-forming body formed of artificial marble, and a first opening and a second
opening are formed on the surface of the artificial marble-forming body. A through passage is
formed in the artificial marble-forming body from the first opening to the second opening.
According to the acoustic body for a portable terminal, the artificial marble-forming body is
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formed of artificial marble.
The modulus of elasticity of the artificial marble is higher than that of hard polyvinyl chloride or
the like, and it is difficult to resonate with the sound from the portable terminal (oscillate at
natural frequency).
Therefore, according to the mobile terminal acoustic body, the sound from the mobile terminal
passes through the through path through the first opening, thereby increasing the volume of the
sound output from the second opening. It is possible to suppress deterioration in the quality of
sound that reaches the user's ear from the portable terminal via the portable terminal acoustic
body due to the resonance of the acoustic body.
[0008]
(2) In the above-mentioned acoustic terminal for portable terminals, the second opening has a
larger opening area than the first opening, and the through path extends from the first opening
to the second opening. It is good also as composition formed in the shape of a horn which the
cross-sectional area which intersects perpendicularly expands. According to the mobile terminal
acoustic body, the through passage has a horn shape. Therefore, when the sound from the
portable terminal passes through the through path through the first opening, the volume of the
sound output from the second opening can be more effectively increased.
[0009]
(3) In the above-mentioned acoustic terminal for portable terminals, the first passage length of
the through hole may be longer than the maximum opening width of the second opening.
According to the mobile terminal acoustic body, compared with the case where the first passage
length of the through path is equal to or shorter than the maximum opening width of the second
opening, the user via the mobile terminal acoustic body from the mobile terminal You can widen
the range of sound that can reach your ears.
[0010]
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(4) In the acoustic device for portable terminals, a third opening is further formed on the surface
of the artificial marble-forming body, and the penetration from the third opening is inside the
artificial marble-forming body. A first branch passage may be formed to penetrate to the inner
wall surface of the artificial marble formation forming the passage. According to this mobile
terminal acoustic body, when the first branch passage does not penetrate to the inner wall
surface of the artificial marble formation body constituting the penetration passage, that is, the
first branch passage penetrates from the first opening to the second opening The space for
forming the first branch in the interior of the artificial marble former can be reduced, and the
artificial marble former can be miniaturized, compared to the case where it is formed separately
from the through passage. .
[0011]
(5) In the mobile terminal acoustic body, the second passage length from the joining position of
the through passage with the first branch passage to the second opening and the third passage
length of the first branch passage are mutually different. It may be configured differently.
According to the mobile terminal acoustic body, compared to the case where the second passage
length from the joining position with the first branch passage in the through hole to the second
opening is equal to the third passage length of the first branch passage, The range of the sound
that reaches the user's ear from the portable terminal via the portable terminal acoustic body can
be expanded.
[0012]
(6) In the above-mentioned acoustic terminal for portable terminals, the opening direction of the
second opening and the opening direction of the third opening may be different from each other.
According to the mobile terminal acoustic body, sound can be output over a wide range from the
mobile terminal acoustic body as compared with the case where the opening direction of the
second opening and the opening direction of the third opening are equal.
[0013]
(7) In the above-mentioned acoustic terminal for portable terminals, the opening area of the
second opening and the opening area of the third opening may be different from each other.
According to the mobile terminal acoustic body, the sound range of the sound reaching the user's
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ear from the mobile terminal via the mobile terminal acoustic body compared to the case where
the opening area of the second opening and the opening area of the third opening are equal. Can
be extended.
[0014]
(8) In the mobile terminal acoustic body, at the junction position of the through path with the
first branch path, in the direction perpendicular to the first branch path and the through path, on
the third opening side A tapered surface may be formed so as to be closer to the central axis of
the first branch as it approaches. According to the mobile terminal acoustic body, the quality of
the sound output from the third opening of the mobile terminal acoustic body, as compared to
the case where the tapered surface is not formed at the joining position of the first branch path
and the through path. Can be suppressed.
[0015]
(9) In the above-mentioned acoustic terminal for portable terminals, the artificial marble-forming
body is a plate-like member having a first surface and a second surface opposite to the first
surface, and the first opening is the above-mentioned The first surface of the plate-like member is
formed at an end of one side in the first direction parallel to the first surface, and the second
opening is the other side of the plate-like member in the first direction. It may be formed on an
end face, and the third opening may be formed on the other end of the second surface of the
plate-like member in the first direction. According to the mobile terminal acoustic body, the
opening direction of the second opening and the opening direction of the third opening are
different. Therefore, compared with the case where the opening direction of the second opening
and the opening direction of the third opening are equal, the area to which the sound from the
acoustic wave for portable terminal can be expanded.
[0016]
(10) In the acoustic member for portable terminals, a fourth opening is formed in an end face of
the other side of the plate-like member in the first direction, and the fourth opening is formed in
the artificial marble-forming body. A second branch passage may be formed to penetrate from
the opening to the inner wall surface of the artificial marble-forming body that constitutes the
through passage. According to the mobile terminal acoustic body, the opening direction of the
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fourth opening is different from the opening direction of the second opening and the third
opening. Therefore, compared with the case where the opening direction of the fourth opening is
equal to the opening direction of the second opening and the third opening, sound can be output
over a wide range from the acoustic terminal for a portable terminal.
[0017]
(11) The system kitchen disclosed in the present specification may be a system kitchen, and may
be configured to include a top plate on which the above-described acoustic reflector for a
portable terminal is formed. According to the present system kitchen, the top plate on which the
mobile terminal acoustic body is formed is formed of artificial marble. Therefore, in the acoustic
for a portable terminal formed on the top plate, the quality of the sound reaching the user's ear
from the portable terminal via the acoustic for a portable terminal is reduced due to the
resonance of the acoustic for a portable terminal. Can be suppressed.
[0018]
(12) The furniture disclosed in the present specification may be a furniture, and may be
configured to include a top plate on which the above-described acoustic reflector for a portable
terminal is formed. According to the present furniture, the top plate on which the mobile
terminal acoustic body is formed is formed of artificial marble. Therefore, in the acoustic for a
portable terminal formed on the top plate, the quality of the sound reaching the user's ear from
the portable terminal via the acoustic for a portable terminal is reduced due to the resonance of
the acoustic for a portable terminal. Can be suppressed.
[0019]
Note that the technology disclosed in the present specification can be realized in various forms,
and can be realized, for example, in the form of a method of manufacturing an acoustic body for
a portable terminal.
[0020]
Explanatory drawing which shows the structure of the system kitchen 100 roughly The
perspective view of the acoustic part 15 of the top plate 10 The bottom view of the acoustic part
15 of the top plate 10 Sectional drawing of the system kitchen 100 in the position of IV-IV of
FIG. Flowchart showing the manufacturing method of the front side member 32 after forming the
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first opening 16 perspective view of the front wall member 34 after forming the notch 18A front
side member after bonding the front wall member 34 and the rear wall member 36 32 is a
perspective view of the front side member 32 after bonding the side wall members 38 and 40. A
perspective view of the top plate 10 after bonding the back side member 42. A cross-sectional
view of the acoustic terminal 200 for portable terminals.
[0021]
A.
First embodiment: A-1.
Configuration of System Kitchen 100 FIG. 1 is an explanatory view schematically showing a
configuration of the system kitchen 100 in the present embodiment. A perspective view of the
system kitchen 100 is shown in FIG. In FIG. 1, mutually orthogonal XYZ axes for specifying the
direction are shown. In this specification, for convenience, the X-axis positive direction is called
the front side, the X-axis negative direction is called the rear side, the Y-axis positive direction is
called the right side, and the Y-axis negative direction is called the left side. Is called the upper
side, and the Z-axis negative direction is called the lower side. The same applies to FIG.
[0022]
The system kitchen 100 is a combination of the sink 50, the cooking platform 60, and the
storage shelf 70 and is integrated, and includes a main body 80 and a top plate 10. A storage
shelf 70 is formed in the main body 80, and more specifically, a drawer 72 and a door 74 are
provided. The top plate 10 is a plate-like member having an upper surface 10A and a lower
surface 10C (see FIG. 2) opposite to the upper surface 10A. The top plate 10 covers the upper
surface of the main body 80, and is formed with a sink opening 12 for installing the sink 50 and
an opening 14 for cooking table for installing the cooking table 60. Furthermore, a horn-like
acoustic passage is formed inside the top plate 10. Hereinafter, in the top plate 10, a portion
where the acoustic passage is formed is referred to as "the acoustic portion 15." The upper
surface 10A is an example of a first surface, and the lower surface 10C is an example of a second
surface.
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[0023]
A−2. Configuration of Top 10: FIG. 2 is a perspective view of the acoustic portion 15 of the
top 10, FIG. 3 is a bottom view of the acoustic portion 15 of the top 10, and FIG. 4 is an acoustic
portion of the top 10 A cross-sectional view of the system kitchen 100 is shown in the IV-IV
position of FIG. 1 where 15 is formed. As shown in FIGS. 2 to 4, a first opening 16 and a second
opening 18 are formed on the surface of the acoustic portion 15. The first opening 16 is formed
on the rear end side of the top surface 10A of the top 10 in the front-rear direction parallel to the
top 10A of the top 10. The first opening 16 is an elongated hole extending in the left-right
direction, and can accommodate the lower end portion of the portable terminal 2 including the
portion provided with the speaker portion 6 in the portable terminal 2. The top 10 is an example
of a mobile terminal acoustic body, and the front-rear direction is an example of a first direction.
[0024]
The second opening 18 is formed on an end surface on the front end side of the top 10 in the
front-rear direction, that is, on the front surface 10B. The second opening 18 is a long hole
extending in a direction parallel to the first opening 16 and is located on the front side of the first
opening 16. As shown in FIG. 3, the width W2 of the second opening 18 in the left-right direction
is larger than the width W1 of the first opening 16, and the opening area XA2 of the second
opening 18 is larger than the opening area XA1 of the first opening 16. wide. As shown in FIG. 4,
the second opening 18 is closed by a mesh-like blind member 30 housed near the second
opening 18. The width W2 of the second opening 18 in the left-right direction is an example of
the maximum opening width of the second opening.
[0025]
A through passage 20 is formed inside the acoustic portion 15 of the top plate 10. The through
passage 20 extends from the first opening 16 to the second opening 18 and extends in the frontrear direction. As shown in FIG. 3, the first passage length L1 of the through passage 20 is longer
than the width W2 of the second opening 18 in the left-right direction. Further, as shown in FIG.
4, in the through passage 20, the cross-sectional area of the through passage 20 (that is, the
opening area of the through passage 20 in a plane orthogonal to the through passage 20) is
constant in the vertical direction. In the left-right direction, it has a horn-like shape expanding at
a constant rate from the first opening 16 toward the second opening 18. The through passage 20
is an example of a horn-like acoustic passage, and the width W2 of the second opening 18 in the
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left-right direction is an example of the maximum opening width of the second opening.
[0026]
Further, a third opening 26 is formed on the surface of the acoustic portion 15 of the top 10. The
third opening 26 is formed on the front end side of the lower surface 10C of the top 10 in the
front-rear direction. That is, the 2nd opening 18 and the 3rd opening 26 are formed in the
mutually different surface of top plate 10, and opening directions differ mutually. The third
opening 26 is a long hole extending in a direction parallel to the first opening 16 and is on the
front side of the first opening 16 and on the rear side of the second opening 18, and the first
opening 16 and the second opening 18 and the second opening 18 side. As shown in FIG. 3, the
width W3 of the third opening 26 in the left-right direction is larger than the width W1 of the
first opening 16 and smaller than the width W2 of the second opening 18. Further, the opening
area XA3 of the third opening 26 is larger than the opening area XA1 of the first opening 16 and
smaller than the opening area XA2 of the second opening 18. As shown in FIG. 4, in the system
kitchen 100, the third opening 26 is located on the front side of the storage shelf 70.
[0027]
Further, as shown in FIG. 4, a first branch path 24 is formed inside the acoustic portion 15 of the
top 10. The first branch passage 24 penetrates from the third opening 26 to the inner wall
surface 22 of the acoustic portion 15 constituting the through passage 20, and extends in the
vertical direction. The first branch path 24 merges with the through path 20 at a merging
position GL located between the first opening 16 and the second opening 18. The second
passage length L2 from the junction position GL to the second opening 18 in the through
passage 20 is the third passage length L3 of the first branch passage 24, ie, the third passage
length L3 from the junction position GL to the third opening 26. Longer than. In addition, in the
lateral direction orthogonal to the first branch passage 24 and the through passage 20, a tapered
surface inclined toward the central axis of the first branch passage 24 as approaching the third
opening 26 side at the merging position GL. Is formed.
[0028]
A−3. Configuration of Acoustic Portion 15: As shown in FIG. 3, the acoustic portion 15
includes a front side member 32, a front wall member 34, a rear wall member 36, a pair of side
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wall members 38 and 40, and a back side member 42. Prepare. The front side member 32, the
front wall member 34, the rear wall member 36, the pair of side wall members 38 and 40, and
the back side member 42 are plate-like members formed of acrylic artificial marble such as metal
methacrylate, for example. is there. Therefore, it can be said that the acoustic part 15 is formed
of artificial marble. The acoustic portion 15 is an example of an artificial marble former.
[0029]
The front side member 32 is flat. The front wall member 34 has a substantially rectangular
shape, and is disposed on the lower side of the front side member 32 along the front end of the
front side member 32. The rear wall member 36 has a rectangular shape, and is disposed along
the rear end of the front side member 32 on the lower side of the front side member 32.
[0030]
The pair of side wall members 38 and 40 has a rectangular shape and is disposed below the front
side member 32. The longitudinal direction of the pair of side wall members 38, 40 extends
substantially in the back and forth direction, and the front end of each side wall member 38, 40
abuts on the front wall member 34, and the rear end of each side wall member 38, 40 It is in
contact with the wall member 36. The lateral distance between the pair of side wall members 38
and 40 is expanded from the rear side to the front side. The side wall member 38 is disposed to
the right of the first opening 16, the second opening 18, and the third opening 26, and the side
wall member 40 has the first opening 16, the second opening 18, and the third opening. It is
arranged on the left side of 26.
[0031]
The back side member 42 has a trapezoidal shape, and is disposed on the lower side of the front
side member 32 so as to be substantially parallel to the front side member 32. The back side
member 42 is disposed below the pair of side wall members 38, 40, and the front end of the back
side member 42 abuts on the front wall member 34, and the back end of the back side member
42 is on the back wall member 36. It abuts. Thereby, a through passage 20 surrounded by the
front side member 32, the front wall member 34, the rear wall member 36, the pair of side wall
members 38 and 40, and the back side member 42 is formed.
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[0032]
A plywood 44 for back surface makeup is disposed around the acoustic portion 15. The back
surface decorative plywood 44 is disposed below the front side member 32, and the front end of
the back surface decorative plywood 44 abuts the front wall member 34, and the rear end of the
back surface plywood 44 is a rear wall member 36. In contact with The plywood 44 for back
surface decoration is arrange | positioned in the part in which the acoustic part 15 is not formed
among the lower side of the front side member 32, and maintains the intensity | strength of the
top plate 10. As shown in FIG.
[0033]
A−4. Method of Manufacturing Top Plate 10 Next, a method of manufacturing the top plate
10 in the present embodiment will be described. FIG. 5 is a flowchart showing a method of
manufacturing the top 10 in the present embodiment.
[0034]
First, the first opening 16 is formed in the front side member 32, and the third opening 26 is
formed in the back side member 42 (S110). FIG. 6 shows a perspective view of the front side
member 32 after the first opening 16 is formed. As shown in FIG. 6, the first opening 16 is
formed by forming a hole in the front side member 32. Similarly, the third opening 26 is formed
by forming a hole in the back side member 42.
[0035]
Next, the notch 18A is formed in the front wall member 34 (S120). FIG. 7 shows a perspective
view of the front wall member 34 after the notch 18A is formed. As shown in FIG. 7, the notch 18
</ b> A is formed by subjecting a part of the upper end of the front wall member 34 to a notch
processing.
[0036]
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Next, the front wall member 34 and the rear wall member 36 are bonded to the front side
member 32 (S130). FIG. 8 shows a perspective view of the front side member 32 after bonding
the front wall member 34 and the rear wall member 36. As shown in FIG. 8, in the front wall
member 34, the upper end where the notch 18 </ b> A is formed is adhered to the lower surface
of the front side member 32. Thereby, the notch 18A formed in the front wall member 34 is
closed by the front side member 32, and the second opening 18 is formed. The rear wall member
36 is adhered to the lower surface of the front side member 32 on the rear side of the first
opening 16. Therefore, blocking of the first opening 16 by the rear wall member 36 is avoided.
[0037]
Next, the side wall members 38 and 40 are adhered to the front side member 32 (S140). FIG. 9
shows a perspective view of the front side member 32 after bonding the side wall members 38
and 40. FIG. 9 shows a perspective view of the front side member 32 as viewed from below. The
lower surface of the front side member 32 is pre-marked at the position where the side wall
members 38 and 40 are adhered, and when the side wall members 38 and 40 are adhered, the
side wall members are attached according to the pre-applied marks 38, 40 are adhered.
[0038]
Next, the back side member 42 is adhered to the side wall members 38 and 40 (S150). FIG. 10
shows a perspective view of the top plate 10 after the back side member 42 is bonded. The
perspective view of the top 10 seen from lower side is shown in figure by FIG. By bonding the
back side member 42 to the side wall members 38 and 40, the through passage 20 is formed
inside the top plate 10.
[0039]
Finally, the back surface decorative plywood 44 is bonded to the front side member 32 (S160).
Thereby, the top plate 10 shown in FIG. 3 is manufactured. Thus, the method of manufacturing
the top 10 ends.
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[0040]
A−5. Effects of the present embodiment: As described above, according to the system kitchen
100 of the present embodiment, the through passage 20 formed in the acoustic portion 15 of the
top plate 10 has a horn shape. Therefore, when the sound from the portable terminal 2 passes
through the through passage 20 through the first opening 16, the volume of the sound output
from the second opening 18 can be increased.
[0041]
Moreover, according to the system kitchen 100 of this embodiment, the acoustic part 15 of the
top plate 10 is formed of an artificial marble. The elastic modulus of the artificial marble is
higher than that of hard polyvinyl chloride or the like, and hardly resonates with the sound from
the portable terminal 2. Therefore, it is possible to suppress deterioration of the quality of sound
that reaches the user's ear from the portable terminal 2 via the acoustic part 15 due to the
resonance of the acoustic part 15.
[0042]
Further, according to the system kitchen 100 of the present embodiment, the first passage length
L1 of the through passage 20 is longer than the width W2 of the second opening 18 in the leftright direction. Therefore, compared with the case where the first passage length L1 is equal to
or shorter than the width W2 of the second opening 18 in the left-right direction, the portable
terminal 2 can reach the user's ear via the acoustic portion 15 of the top 10 The sound range can
be broadened.
[0043]
Further, according to the system kitchen 100 of the present embodiment, the first branch
passage 24 penetrates to the inner wall surface 22 of the acoustic portion 15 constituting the
through passage 20. Therefore, the first branch passage 24 which penetrates from the first
opening 16 to the third opening 26 without penetrating the first branch passage 24 to the inner
wall surface 22 of the acoustic portion 15 constituting the through passage 20 corresponds to
the through passage 20. As compared with the case where they are separately formed, the space
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for forming the first branch path 24 inside the acoustic portion 15 can be reduced, and the
acoustic portion 15 can be miniaturized.
[0044]
Further, according to the system kitchen 100 of the present embodiment, the first branch
passage 24 is formed in the acoustic portion 15 of the top plate 10, and the second passage
length from the joining position GL in the through passage 20 to the second opening 18 L2 is
longer than the third passage length L3 of the first branch passage 24. Therefore, compared with
the case where the second passage length L2 is equal to the third passage length L3, the sound
range of the sound reaching the user's ear from the portable terminal 2 via the acoustic portion
15 can be expanded.
[0045]
Further, according to the system kitchen 100 of the present embodiment, the second opening 18
is open on the front side, and the third opening 26 is opened on the lower side. The opening
direction of the second opening 18 and the third opening 26 Is different from the opening
direction of. Therefore, compared with the case where the opening direction of the second
opening 18 and the opening direction of the third opening 26 are equal, sound can be output
over a wide range from the acoustic portion 15 of the top 10.
[0046]
Further, according to the system kitchen 100 of the present embodiment, the opening area XA2
of the second opening 18 is larger than the opening area XA3 of the third opening 26. Therefore,
compared to the case where the opening area XA2 of the second opening 18 and the opening
area XA3 of the third opening 26 are equal, the sound range of the sound reaching the user's ear
from the portable terminal 2 via the acoustic portion 15 of the top 10 It can be spread.
[0047]
Further, according to the system kitchen 100 of the present embodiment, the central axis of the
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first branch passage 24 approaches the third opening 26 side in the left-right direction at the
junction position GL of the first branch passage 24 and the through passage 20. An inclined
tapered surface is formed to approach. Therefore, it is possible to suppress deterioration in the
quality of the sound output from the third opening 26 of the acoustic portion 15 of the top 10 as
compared to the case where no tapered surface is formed at the joining position GL.
[0048]
B. Second embodiment: B-1. Configuration of Portable Terminal Acoustic Body 200 FIG. 11 is a
cross-sectional view of a portable terminal acoustic body 200 (hereinafter referred to as
“acoustic body 200”) in the present embodiment. The acoustic body 200 is a horizontallyplaced acoustic body whose depth in the front-rear direction is longer than the height in the
vertical direction, has a substantially rectangular parallelepiped shape, and is formed of artificial
marble. The acoustic body 200 extracts the acoustic portion 15 from the top plate 10 in the first
embodiment and reduces the size thereof into a single product. The acoustic body 200 in the
present embodiment does not include the blindfold member 30 for closing the second opening
18, has a resin leg member 90 for supporting the acoustic body 200, and a fourth opening 92 on
the surface of the acoustic body 200. Are different from the acoustic portion 15 in the first
embodiment in that Below, about the structure same as the structure of the acoustic part 15 of
the top 10 in 1st Embodiment mentioned above among the structures of the acoustic body 200,
the description is suitably abbreviate | omitted by attaching | subjecting the code | symbol. The
acoustic body 200 is another example of an artificial marble former.
[0049]
The fourth opening 92 is formed on an end surface on the rear end side of the acoustic body 200
in the front-rear direction, that is, on a rear surface 10D. That is, the fourth opening 92, the
second opening 18 and the third opening 26 are formed on mutually different surfaces of the
acoustic body 200, and the opening directions are different from each other. The fourth opening
92 is a long hole extending in a direction parallel to the first opening 16. The width W4 of the
fourth opening 92 in the left-right direction is larger than the width W1 of the first opening 16
and smaller than the width W3 of the third opening 26. Further, the opening area XA4 of the
fourth opening 92 is larger than the opening area XA1 of the first opening 16 and smaller than
the opening area XA3 of the third opening 26.
[0050]
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In addition, as shown in FIG. 11, a second branch path 94 is formed inside the acoustic body 200.
The second branch passage 94 penetrates from the fourth opening 92 to the inner wall surface
22 of the acoustic body 200 constituting the through passage 20, and extends in the front-rear
direction. The second branch path 94 merges with the second branch path 94 at a merging
position GR located on the opposite side of the first opening 16 and the second opening 18 and
the third opening 26 in the front-rear direction.
[0051]
B−2. Effects of the Present Embodiment As described above, according to the acoustic body
200 of the present embodiment, the opening direction of the fourth opening 92 and the opening
direction of the second opening 18 and the third opening 26 are different. Therefore, compared
with the case where the opening direction of the fourth opening 92 and the opening direction of
the second opening 18 and the third opening 26 are equal, sound can be output from the
acoustic body 200 over a wide range.
[0052]
C. Modifications: The technology disclosed in the present specification is not limited to the
embodiments described above, and can be modified into various forms without departing from
the scope of the present invention. For example, the following modifications are possible. is there.
[0053]
In the said 1st Embodiment, although the example in which the acoustic body for portable
terminals was integrated in the top plate 10 of the system kitchen 100 was shown, it is not
restricted to this. The portable terminal acoustic body may be incorporated into a member other
than the top plate, for example, if it may be incorporated into the top plate of furniture or the
like.
[0054]
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In the second embodiment, an example is shown in which the present invention is applied to a
horizontal type acoustic terminal for a portable terminal, but the acoustic for a portable type
terminal for vertical type is longer than the depth in the vertical direction than the depth in the
front and rear direction. May apply to the body. The upright type mobile terminal acoustic body
has a substantially rectangular parallelepiped shape, and is formed of artificial marble. In the
upright type mobile terminal acoustic body, the first opening is formed on the upper surface of
the mobile terminal acoustic body, and the second opening is formed on the lower end side of the
front surface of the mobile terminal acoustic body. The third opening is formed on the lower end
side of the rear surface of the mobile terminal acoustic body and above the second opening in the
vertical direction. On the other hand, the fourth opening is not formed in the vertical type
acoustic terminal for a portable terminal. In the vertical type acoustic terminal for a portable
terminal, a support portion for supporting the lower end surface of the portable terminal is
formed in the vicinity of the first opening in the through passage.
[0055]
In the said embodiment, although the plate-shaped top plate was shown as an example of an
artificial marble formation object, the shape of an artificial marble formation object is not
restricted to plate shape. The artificial marble former is not limited to a specific shape as long as
the first opening and the second opening are formed on the surface and the through passage is
formed inside.
[0056]
In the above embodiment, the cross-sectional area of the through passage is enlarged at a
constant rate as it goes from the first opening to the second opening. However, the present
invention is not limited thereto. It may be expanded exponentially as The expansion of the
through-passage in the form of an exponential function makes it possible for the user to use the
portable terminal acoustic body via the portable terminal acoustic body when being output from
the portable terminal acoustic body, as compared with the case where the expansion is made at a
constant rate. It is possible to suppress deterioration in the quality of sound reaching the ear.
Furthermore, the cross-sectional area of the through passage may be constant from the first
opening to the second opening.
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[0057]
In the above embodiment, although the example in which the opening area of the second
opening is wider than the opening area of the first opening and the through passage has a horn
shape has been described, the present invention is not limited thereto. The opening area of the
second opening may be smaller than the opening area of the first opening as long as the opening
area of the opening may be the same.
[0058]
In the above embodiment, although the example in which the second passage length L2 is longer
than the third passage length L3 has been described, the present invention is not limited thereto,
and the second passage length L2 may be the same as the third passage length L3. The second
passage length L2 may be shorter than the third passage length L3.
[0059]
In the above-mentioned embodiment, although the 2nd opening, the 3rd opening, and the 4th
opening showed the example connected to the same penetration way, it is not restricted to this, A
plurality of artificial marble formation objects are connected to the 1st opening A through
passage may be formed, and the second opening, the third opening, and the fourth opening may
be connected to separate through passages.
[0060]
In the above embodiment, the third opening is formed on the lower surface 10C of the top plate
10. However, the present invention is not limited to this. If the third opening is formed on a
surface different from the second opening, the third The opening may be formed on the upper
surface or the side surface.
The same applies to the fourth opening.
[0061]
Although the end by the side of the penetration way of the 1st branch way showed the example
which carries out taper shape in the above-mentioned embodiment, it is not restricted to this, for
example, the end by the side of the penetration path of the 1st branch way It may be square.
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[0062]
Although the example which can accommodate the lower end part of portable terminal 2 in the
above-mentioned embodiment showed the example which is not restricted to this, it is not
restricted to this, but the 1st opening so that speaker part 6 of portable terminal 2 may face the
1st opening The portable terminal 2 may be able to be held on the upper side of the.
[0063]
Although the artificial marble formation object showed the example currently formed with acrylic
artificial marbles, such as a metal methacrylate, in the said embodiment, you may form with the
artificial marble of another material.
[0064]
2: Mobile terminal 6: Speaker unit 10: Top plate 15: Acoustic portion 16: First opening 18:
Second opening 20: Through passage 24: First branch 26: Third opening 30: Blind member 32:
Front side member 34 : Front wall member 36: back wall member 38, 40: side wall member 42:
back member 92: fourth opening 94: second branch 100: system kitchen 200: acoustic body for
portable terminals GL, GR: joining position L1: first 1 passage length L2: second passage length
L3: third passage length
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