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JP2014209709

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DESCRIPTION JP2014209709
Abstract: To provide a portable terminal holder capable of securing the same acoustic
performance as the conventional one while reducing the size further than the conventional one.
SOLUTION: A resonance tube 30 is emphasized in the frequency at which reproduced sound
from the speaker unit of the portable terminal 1 resonates, and the resonance tube is provided
inside, and the speaker unit and the resonance tube are mounted when the portable terminal is
mounted. A portable terminal holder main body 11 connecting the portable terminal and the
resonance pipe in a state where the inlet 31 of the main body is abutted, and the outlet 32 of the
resonance pipe is opened to the outside of the portable terminal holder main body There is.
[Selected figure] Figure 2
Mobile terminal holder
[0001]
The present invention relates to a portable terminal holder as an accessory for a portable
terminal which has an acoustic structure and amplifies reproduced sound emitted from a speaker
unit of the portable terminal without using electrical energy.
[0002]
BACKGROUND In recent years, mobile terminals such as smart phones (mobile phones) and
tablet terminals (information terminals) have rapidly spread, and along with this, various mobile
terminal accessories have been provided.
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For example, when viewing a moving image downloaded from a moving image sharing site or the
like on a portable terminal, the size of the speaker unit built in the portable terminal may be very
small, and the reproduced sound from the speaker unit of the portable terminal may be small and
difficult to hear Also, even if the portable terminal is placed flat on a table, etc., it may be difficult
to see the screen of the portable terminal, but such a problem is solved and the reproduced
sound from the speaker unit of the portable terminal becomes loud and easy to hear. Also, a
portable terminal holder has been proposed which makes it easy to view the screen of the
portable terminal.
[0003]
In this conventional portable terminal holder, a horn as an acoustic structure for amplifying
reproduced sound emitted from the speaker unit of the portable terminal without using electric
energy, and a tabletop etc. The portable terminal holder main body such as a holder or a stand
which makes it easy to view the screen of the portable terminal. The horn is housed inside the
portable terminal holder main body, and the portable terminal holder main body is a speaker
section of the portable terminal in order to efficiently put reproduction sound emitted from a
speaker section of the portable terminal into the horn when the portable terminal is mounted.
The portable terminal and the horn are coupled in a state where the and the entrance of the horn
are butted. The role of the horn is to efficiently transmit the radiation of the sound from the
speaker to the outside, and the cross-sectional area of the horn increases continuously from the
entrance toward the exit.
[0004]
Further, in this conventional portable terminal holder, the horn generates directivity, and the
sound pressure in that direction is increased. Therefore, the outlet of the horn is open to the
outside of the portable terminal holder main body in a direction in which the screen of the
portable terminal faces when the portable terminal is attached, and reproduction is emitted from
the speaker portion regardless of the position of the speaker portion The sound can be directed
toward the user. As a result, the reproduced sound emitted from the speaker unit of the portable
terminal becomes larger and easier to hear.
[0005]
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As such a conventional portable terminal holder, there are, for example, a "horn for portable
telephone" disclosed in Patent Document 1 and a "mobile terminal holder for automobile"
disclosed in Patent Document 2. Straight type horns are adopted in these horns and holders.
Further, there are a "acoustic dock for portable electronic device" disclosed in Patent Document 3
and a "mobile terminal stand with acoustic amplification function" disclosed in Patent Document
4. These docks and stands use an acoustic labyrinth type horn in which a straight type horn is
folded and folded in its length direction. Furthermore, there are a "speaker accessory for portable
terminal" disclosed in Patent Document 5 and a "Sound Box for Mobile Phone" disclosed in
Patent Document 6. In these accessories and the acoustic box, a spiral horn in which a straight
horn is spirally wound in the length direction is adopted.
[0006]
Design Registration No. 1433941 Design Registration No. 1444564 US Patent No. 8320597
Specification No. Design Registration No. 1429383 Japanese Patent Laid-Open No. 2007110656 Japanese Patent Laid-Open No. 2005-184050
[0007]
In the case of such a portable terminal holder, a compact size which does not choose a place is
preferable from the usage.
The target size is such that the portable terminal holder can be placed and used if the target
machine can be placed flat. This is because if the target machine can not be placed by being
attached to the portable terminal holder even though it can be placed alone, the convenience of
the portable terminal will be lost.
[0008]
Of the conventional portable terminal holders that accommodates the horn as an acoustic
structure that amplifies the reproduction sound emitted from the speaker unit of the portable
terminal without using electrical energy inside the portable terminal holder body, the overall size
is the largest. According to Patent Document 5, a small and high acoustic performance can be
obtained by adopting a spiral horn capable of forming the longest horn in the smallest space, but
still, when the target machine is a smartphone , Greatly exceeds the target size.
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[0009]
Although downsizing is required for such a portable terminal holder, a horn is used as an
acoustic structure for amplifying reproduction sound emitted from a speaker unit of the portable
terminal without using electric energy, inside the portable terminal holder body. If the size is
further reduced by using the conventional portable terminal holder to be accommodated, the
length of the horn is shortened and the spread is also reduced, so that the output sound pressure
is reduced and the sound quality is deteriorated.
[0010]
Further, in Patent Document 6, when the portable terminal is attached, the acoustic box is
provided with a charging pin capable of contacting the charging terminal of the portable
terminal, and is also considered to serve as a charger function.
However, in a conventional portable terminal holder, the conventional portable terminal holder
accommodates a horn as an acoustic structure for amplifying reproduction sound emitted from
the speaker unit of the portable terminal without using electric energy inside the portable
terminal holder body. As disclosed in 6, almost all of the internal space is occupied by the horn,
and it is difficult to accommodate therein electronic / electrical parts and the like electrically
connected to the charging pin.
Therefore, it is difficult to combine the charger function.
[0011]
Then, this invention is made in view of the said problem, and an object of this invention is to
provide the portable terminal holder which can ensure acoustic performance equivalent to the
past, reducing in size further than before.
[0012]
The portable terminal holder according to the present invention as means for solving the above
problems has a resonance tube as an acoustic structure for amplifying reproduction sound
emitted from the speaker unit of the portable terminal which has conventionally been a horn
without using electrical energy. Furthermore, it is realized by utilizing the audibility
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characteristics by adopting the optimization design of the resonance tube, and securing the same
acoustic performance as the conventional while reducing the size further than the conventional
one.
In addition, in the case where the target machine is a smartphone, it has been miniaturized which
may achieve the target size. In addition, it can also be used as a charging cradle.
[0013]
Therefore, in the portable terminal holder according to the present invention, the reproduction
sound emitted from the speaker unit of the portable terminal is amplified without using electric
energy, and the reproduction sound emitted from the speaker unit of the portable terminal can
be added thereto. The resonance pipe is provided with a resonance pipe inside, and the speaker
unit of the portable terminal and the entrance of the resonance pipe are provided when the
portable terminal is mounted, while the resonance pipe is provided inside the resonance pipe. It
has a portable terminal holder main body which couples the portable terminal and a resonance
pipe in a state where they are butted, and an outlet of the resonance pipe is opened to the
outside of the portable terminal holder main body.
[0014]
By adopting such a configuration, it is possible to efficiently put the reproduction sound emitted
from the speaker unit of the portable terminal into the resonance tube when the portable
terminal is mounted.
And in the resonance tube, the reproduction sound emitted from the speaker part of the portable
terminal enters it, resonance (resonance) occurs in the tube, and the sound of resonance
frequency is emphasized (amplified) and comes out from the exit of the resonance tube Because
of that, the emphasized sound becomes audible and loud. That is, the reproduced sound emitted
from the speaker unit of the portable terminal becomes loud and easy to hear.
[0015]
Furthermore, the sensitivity of the bass is extremely poor due to human hearing characteristics,
and the sensitivity of about 2000 Hz to 5000 Hz is very good. For example, if it is about 500 Hz
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(the frequency characteristic of a general speaker unit built in a portable terminal) , You can hear
the playback sound from this frequency. By forming the resonance tube resonating with the low
sound of), it is possible to make the bass feel and to increase the volume feeling. Further, by
forming a resonance tube that resonates with sound in a frequency band of about 2000 Hz to
5000 Hz, it is possible to further increase the sense of volume. From this, it is preferable to form
the resonance tube so that the resonance frequency appears in a frequency band of about 500
Hz to 5000 Hz in order to use the audibility characteristic.
[0016]
In addition, the resonance tube is a normal type whose cross-sectional area does not change
constantly from the inlet to the outlet, and a tapered type with a tip-spreading shape whose
cross-sectional area changes non-constantly (increases continuously) from the inlet to the outlet
Either can be used. Here, although the horn is also in the shape of a point spread, the horn and
the tapered resonance tube are completely different in principle.
[0017]
For the purpose of amplifying the sound of a specific frequency, the resonance tube is easy to
design compared to the horn, and the smaller size allows the effect to be obtained, so the overall
size is much smaller than the conventional one Can be In addition, when the target machine is a
smartphone, it can be miniaturized which may achieve the target size.
[0018]
Generally, the main body size of the tablet terminal is about A4 to A5 size, while the main body
size of the smartphone is about 60 mm to 70 mm in width and about 120 mm to 140 mm in
height, compared with the A5 size tablet terminal Even quite small. On the other hand, in the case
of the resonance tube, the resonance frequency can be obtained by the sound velocity: 340 m /
sec ÷ (4 × the length of the resonance tube), and the length for obtaining the resonance
frequency in calculation is only 1/4 of the sound velocity. It will be. For example, the length of
the resonance tube that resonates at a low sound of around 500 Hz is about 170 mm in
calculation, and it slightly exceeds the height of the smartphone, but bends the resonance tube
once so that it falls below the height of the smartphone be able to. Resonant tubes may have
their resonance effect diminished when they are bent, but if they are bent once, they will have
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almost the same effect as when they are not bent once. Moreover, the resonance tube does not
have the wide spread like a horn even in a tapered type. That is, in the case of a resonance tube,
an effect can be obtained in a frequency band higher than about 500 Hz with a small size that
fits within the planar area (horizontal width × height) of the smartphone.
[0019]
In addition, as a portable terminal holder body, for example, put it on a table top in a home or
office, on a dashboard in an automobile, etc., and hold the portable terminal in a standing state
on its mounting surface A portable terminal holder such as a holder or a stand that makes the
screen easy to view is adopted, and a resonance pipe is provided inside the portable terminal
holder such that a resonance frequency appears in a frequency band of about 500 Hz to 5000
Hz, and those portable terminal holding Even when the device and the resonance tube are
combined, the overall size can be further reduced from the conventional one. In addition, when
the target machine is a smartphone, it can be miniaturized which may achieve the target size.
[0020]
In addition, the portable terminal holder main body is provided with a charging pin that can
contact the charging terminal of the portable terminal when the portable terminal is mounted,
and an electronic / electrical component for electrically connecting the charging pin is
accommodated inside. Even if the portable terminal holder also functions as a charging stand, it
can be accommodated with surplus space in the surplus space inside the portable terminal holder
main body because of its small size in the resonance tube. it can. In other words, the charging
stand can easily be equipped with an acoustic function that amplifies the reproduced sound
emitted from the speaker unit of the portable terminal without using electrical energy, and it can
also be mounted on the existing charging stand It becomes possible without the need to change
(design).
[0021]
Furthermore, when the portable terminal is attached, the exit of the resonance tube is directed to
the direction in which the screen of the portable terminal faces, so that the reproduction sound
emitted from the speaker section is directed to the user regardless of the position of the speaker
section of the portable terminal. You will be able to aim it out. As a result, the reproduced sound
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emitted from the speaker unit of the portable terminal becomes larger and easier to hear.
[0022]
Moreover, in the portable terminal holder according to the present invention, it is preferable that
a horn portion is formed on the outlet side of the resonance pipe. The radiation of the sound (the
vibration of air) emphasized by the resonance tube can be efficiently transmitted to the outside.
As a result, the reproduced sound emitted from the speaker unit of the portable terminal
becomes larger and easier to hear.
[0023]
Furthermore, in the portable terminal holder according to the present invention, the portable
terminal holder body includes a mounting surface for mounting the portable terminal, and a
groove formed in the mounting surface, and the resonance tube is The terminal holder body and
the groove of the portable terminal holder body in cooperation with the groove form the inlet
and the outlet, and the groove is covered to open the inlet and the outlet to the portable terminal
holder It is also possible to constitute using a cover attached to the mounting surface of the main
body.
[0024]
According to the portable terminal holder of the present invention, it is possible to secure the
same acoustic performance as the conventional one while reducing the size further than the
conventional one.
In addition, when the target machine is a smartphone, it can be miniaturized which may achieve
the target size. In addition, it can also be used as a charging cradle.
[0025]
It is a figure which shows the portable terminal used as the object machine hold | maintained
with the portable terminal holder as an attachment for portable terminals by the Example of this
invention, Comprising: FIG. 1 (A) is the front view, FIG.1 (B) is. It is a rear view. It is a figure which
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shows the structure which looked at the portable terminal holder as an attachment for portable
terminals by Example 1 of this invention from the side. It is a figure which shows the structure
which looked at the portable terminal holder by Example 1 shown in FIG. 2 in the arrow X
direction shown to the figure. It is a figure which shows the structure which looked at the
portable terminal holder by Example 1 shown in FIG. 2 in the arrow Y direction shown to the
figure. It is a figure which shows an internal structure in the state which cut the portable
terminal holder by Example 1 shown in FIG. 2 by the AA shown in FIG. It is a figure which shows
an internal structure in the state which cut the portable terminal holder by Example 1 shown in
FIG. 2 by the BB line shown in FIG. It is a perspective view which shows the external appearance
of the resonance pipe (acoustic duct) which has in the portable terminal holder by Example 1
shown in FIG. It is a frequency characteristic comparison figure which shows the result of having
measured the frequency characteristic of the portable terminal holder by Example 1 shown in
FIG. 2, and the frequency characteristic of the portable terminal holder by a comparative
example. It is a figure which shows the 1st thru | or 3rd resonance tube P1, P2, and P3, FIG. 9 (A)
is a perspective view which shows the external appearance of the 1st resonance tube P1, FIG. 9
(B) is a figure of the 2nd resonance tube P2. FIG. 9C is a perspective view showing the
appearance of the third resonance pipe P3. The result corresponding to the radiation sound of
the speaker unit of the portable terminal shown in FIG. 1 and the radiation sound from the sound
emission hole of the speaker unit of the portable terminal shown in FIG. 1 at the inlet 31a of the
resonance tubes P0, P1 and P2 shown in FIG. These are frequency characteristic comparison
diagrams showing the respective results of measuring the radiation sound from the outlet 32a
with a microphone. FIG. 10 is a frequency characteristic comparison diagram showing the results
of comparison of the frequency characteristics of the first to third resonance pipes P1, P2 and P3
shown in FIG. 9 with the speaker unit 3 (without the resonance pipe) of the portable terminal 1
shown in FIG. . It is a frequency characteristic comparison figure which shows the analysis result
of the simulation using the measurement result and analysis model about the 1st resonance pipe
P1 shown to FIG. 9 (A). It is a frequency characteristic comparison figure which shows the
analysis result of the simulation using the measurement result and analysis model about the 2nd
resonance pipe P2 shown to FIG. 9 (B). It is a figure which shows the 1st-5th analysis models C1,
C2, C3, C4, and C5, and FIG. 14 (A) is a side view which shows the 1st analysis model C1, FIG. 14
(B) is a 2nd analysis model A side view showing C2, FIG. 14 (C) is a side view showing a third
analysis model C3, FIG. 14 (D) is a side view showing a fourth analysis model C4, FIG. 14 (E) is a
fifth analysis It is a side view showing model C5.
It is a frequency characteristic comparison figure which each shows the analysis result of the
simulation using the 1st thru | or 5th analysis model C1, C2, C3, C4, C5 shown in FIG. It is a
figure which shows the structure which looked at the portable terminal holder as an attachment
for portable terminals by Example 2 of this invention from the side. It is a figure which shows the
structure which looked at the portable terminal holder by Example 2 shown in FIG. 16 in the
arrow X direction shown to the figure. It is a figure which shows the structure which looked at
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the portable terminal holder by Example 2 shown in FIG. 16 in the arrow Y direction shown to
the figure. It is a figure which shows an internal structure in the state which cut the portable
terminal holder by Example 2 shown in FIG. 16 by the AA shown in FIG. It is a figure which
shows an internal structure in the state which cut the portable terminal holder by Example 2
shown in FIG. 16 by the BB line shown in FIG. It is a perspective view which shows the external
appearance of the resonance pipe (acoustic duct) provided in the portable terminal holder by
Example 2 shown in FIG. It is a perspective view which shows the external appearance of the
portable terminal holder as an attachment for portable terminals by Example 3 of this invention.
It is a front view which shows the external appearance of the portable terminal holder by
Example 3 shown in FIG. It is a figure which shows an internal structure in the state which cut |
disconnected the portable terminal by Example 3 shown in FIG. 23 by the AA line shown to the
same figure.
[0026]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings.
[0027]
FIG. 1 is a view showing a portable terminal as a target machine held by a portable terminal
holder as a portable terminal attachment according to an embodiment of the present invention,
and FIG. 1 (A) is a front view thereof; B) is its rear view.
The portable terminal 1 shown to FIG. 1 (A) and FIG. 1 (B) is a smart phone of general size.
[0028]
As shown in FIG. 1A, on the front side of the portable terminal 1, a liquid crystal screen 2 which
is a display unit which doubles as a touch operation unit is provided. Further, as shown in FIG. 1
(B), a sound emission hole 4 of the speaker unit 3 is provided at the upper part on the back side
of the portable terminal 1. The speaker unit 3 is configured by providing the sound output hole
4, a cavity 5 communicating with the sound output hole 4 and formed inside the housing of the
portable terminal 1, and a speaker unit 6 accommodated in the cavity 5. A sound such as a ring
tone or music reproduced by the speaker unit 6 is emitted from the sound emission hole 4.
Furthermore, as shown to FIG. 1 (B), the terminal 7 for charge is provided in the back side lower
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part of the portable terminal 1 by a pair.
[0029]
FIG. 2 is a side view of a portable terminal holder as an attachment for a portable terminal
according to a first embodiment of the present invention, and FIG. 3 is a view showing the
portable terminal holder according to the first embodiment shown in FIG. FIG. 4 is a view
showing the configuration seen in the arrow X direction shown in FIG. 1, FIG. 4 is a view showing
the configuration seen in the arrow Y direction shown in FIG. 2 showing the portable terminal
holder according to the first embodiment shown in FIG. 3 shows the internal structure of the
portable terminal holder according to the first embodiment shown in FIG. 2 taken along the line
A-A shown in FIG. 3, and FIG. 6 shows the portable terminal holder according to the first
embodiment shown in FIG. It is a figure which shows an internal structure in the state cut |
disconnected by the BB line shown in FIG.
[0030]
For example, when viewing a moving image downloaded from a video sharing site or the like
with the portable terminal 1, the liquid crystal screen 2 of the portable terminal 1 is hard to see if
the portable terminal 1 is placed flat on a table etc. If the speaker unit 6 built in the portable
terminal 1 is very small in size and the reproduced sound emitted from the speaker unit 3 of the
portable terminal 1 is small and hard to hear, etc., the embodiments shown in FIGS. The portable
terminal holder 10 according to Example 1 is an attachment for the portable terminal 1 which is
convenient to use.
[0031]
As shown in FIG. 2 to FIG. 6, the mobile terminal holder main body 11 of the mobile terminal
holder 10 according to the first embodiment is placed on a mounting surface G such as a
tabletop, and the mobile terminal 1 is placed on the mounting surface G. It is also used as a
holder or a stand that holds in a standing state and makes the liquid crystal screen 2 of the
portable terminal 1 easier to view, the width is approximately the same as the height of the
portable terminal 1, and the height in the vertical direction is the width of the portable terminal 1
Such as the pedestal 12 which is larger than the thickness of the front and rear direction is larger
than the thickness of the portable terminal 1, and the triangular prism or quadrangular prism is
laid laterally from the lower central portion on the back side of the pedestal 12 The pedestal 13
supports the pedestal 12 from the back side by having the pedestal 13 formed projecting in a
state and the bottom surface of the pedestal 13 contacts the placing surface G, and the pedestal
12 is placed on the placing surface G. In order to be able to be placed stably on the mounting
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11
surface G in a state where it stands upright on the back side You have me.
In addition, on the front side of the receiving table 12, there are a receiving recess 14 for the
entire portable terminal 1 and a pair of hooking portions 15 formed so as to slightly project
inward from the front end of the left and right inner wall surfaces of the receiving recess 14
There is.
In the mobile terminal holder main body 11 of the mobile terminal holder 10 according to the
first embodiment, the liquid crystal screen 2 of the mobile terminal 1 is in the front, and the
mobile terminal 1 is oriented sideways (for charging the mobile terminal 1 when the mobile
terminal 1 is attached) The terminal 7 contacts the charging pin 17 described later, and the
sound emission hole 4 of the speaker unit 3 of the portable terminal 1 faces the same straight
line as the inlet 31 of the acoustic duct 30 described later. The direction in which the upper end
of the portable terminal 1 is directed to the left and the lower end of the portable terminal 1 is
directed to the right. In the state, after inserting one end in the longitudinal direction of the
portable terminal 1 under the one hooking portion 15, push the other end in the longitudinal
direction of the portable terminal 1 under the other hooking portion 15, By fitting and mounting
the whole into the recess 14, the mobile terminal 1 is placed in a state where the liquid crystal
screen 2 of the mobile terminal 1 is inclined to the back side along the base 12 on the front side
of the base 12. It can be held. The inclination angle θ of the receiving table 12 is, for example,
about 60 °. Also, at the center of the upper side wall of the receiving recess 14, there is a notch
16 that exposes the side of the portable terminal 1 to the outside when the portable terminal 1 is
attached, and to the outside at the notch 16 when the portable terminal 1 is removed. A fingertip
is put on the exposed side surface of the portable terminal 1 so that the portable terminal 1 can
be taken out from the receiving recess 14.
[0032]
In addition, the portable terminal holder main body 11 of the portable terminal holder 10
according to the first embodiment is provided with a charging pin 17 that can contact the
charging terminal 7 of the portable terminal 1 when the portable terminal 1 is attached. The
portable terminal 1 of the portable terminal holder 10 according to the first embodiment of the
present invention is also used as a charging stand for charging the portable terminal 1. Is housed
in a substrate 20 (PCB) for mounting a connector socket 18 for connecting other electronic and
electrical components 19 and the like, and the pair of charging pins 17 is a pair of portable
terminals 1 mounted in a proper orientation in the receiving recess 14 Are disposed in the
receiving recess 14 so as to be exposed from the two bottom surfaces (two at the right end when
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viewed from the front in the illustrated example) of the receiving recess 14 facing the charging
terminal 7 of Plug insertion port 18a of Tsu DOO 18 is disposed on one side of the base 13.
When the portable terminal 1 is attached, the AC adapter connected to the power supply is
connected to the connector socket 18 to supply power to the pair of charging terminals 7 of the
portable terminal 1 via the substrate (wiring) 20 and the pair of charging pins 17 It can supply
voltage. The pair of charging pins 17 may be mounted on a dedicated substrate different from
the substrate 20 on which the connector socket 18 is mounted, and may be connected to the
substrate 20 on which the connector socket 18 is mounted using a cable. Further, the charging
pin 17 in the illustrated example is always elastically urged in the projecting direction, and the
tip of the charging pin 17 is movable according to the attachment / removal of the portable
terminal 1.
[0033]
The base 12 and the base 13 constituting the outer shell of the mobile terminal holder main body
11 of the mobile terminal holder 10 according to the first embodiment integrally formed the
front plate and the peripheral side wall of the base 12 and opened on the back side. The rear
case 22 is integrally formed with the front case 21 and the whole of the pedestal 13 and the rear
plate of the pedestal 12 and opened on the front side, and is fixed to the front case 21 with
screws or the like. It is configured. Each case 21 and 22 is formed of resin such as ABS. In
addition, each electronic / electrical component housed inside the portable terminal holder main
body 11 of the portable terminal holder 10 according to the first embodiment is attached to the
front case 21 side. Specifically, the substrate 20 is fixed to the front case 21 with screws or the
like along the inner surface of the receiving recess 14 of the front case 21. Further, the front case
21 is provided with an inlet 23 and an outlet 25 for reproduction sound emitted from the
speaker unit 3 of the portable terminal 1. Specifically, the entrance hole 23 is one bottom surface
of the receiving recess 14 facing the sound emitting hole 4 of the speaker unit 3 of the portable
terminal 1 mounted in the receiving recess 14 in the normal direction (in the example shown
from the front It is provided in one place at the left end). In addition, an annular packing 24
made of an elastic material such as rubber or silicon is attached around the inlet hole 23. By
attaching the periphery of the sound output hole 4 of the speaker unit 3 of the mobile terminal 1
to the packing 24 when the mobile terminal 1 is attached, the gap between the entrance hole 23
and the sound output hole 4 of the speaker unit 3 of the mobile terminal 1 I try to prevent sound
leakage. On the other hand, in the lower part on the front side of the receiving base 12, the
receiving recess 14 is formed to be offset to the upper part on the front side of the receiving pad
12 so that the opening surface of the receiving recess 14 is lower than the receiving recess 14 A
sound emitting surface 26 is formed in the same plane as the mobile terminal 1 and facing the
same direction as the liquid crystal screen 2 of the mobile terminal 1 is attached, and the outlet
hole 25 has a width in the sound emitting surface 26. It is widely formed. Note that a cover or
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the like may be attached to the sound emitting surface 26 to prevent the entry of dust and the
like from the outside through the outlet hole 25 into the inside of the portable terminal holder
body 11. Of course, the cover has sufficient air permeability and does not inhibit the emission of
sound from the exit hole 25 to the outside of the portable terminal holder body 11.
[0034]
In addition, the portable terminal holder 10 according to the first embodiment is provided inside
the portable terminal holder body 11 and has an inlet 31 connected to the inlet hole 23 and an
outlet 32 connected to the outlet hole 25. The acoustic duct 30 has a sound duct 30 for limiting
the path for propagating the reproduced sound radiated from the inside to the outlet hole 25.
When the portable terminal 1 is attached, the outlet 32 of the acoustic duct 30 is directed in the
direction to which the liquid crystal screen 2 of the portable Regardless of the position of the
speaker unit 3 of the portable terminal 1 (in the illustrated example, the back side of the portable
terminal 1 opposite to the user direction), the reproduced sound emitted from the speaker unit 3
is directed toward the user It can be done. Moreover, when the portable terminal 1 is attached,
the sound emission hole 4 of the speaker unit 3 of the portable terminal 1 is directed to the
portable terminal holder main body 11, so that the reproduction sound pressure is reduced due
to interference with the reflected sound. can avoid. As a result, the reproduced sound emitted
from the speaker unit 3 of the portable terminal 1 becomes large and easy to hear. The external
appearance of the acoustic duct (resonance pipe) provided in the portable terminal holder 10
according to the first embodiment is shown in a perspective view in FIG.
[0035]
In the inside of the portable terminal holder main body 11, the acoustic duct 30 has a shape
(path) avoiding all the electronic and electrical parts including the connector socket 18 and the
substrate 20 provided therewith, from the speaker portion 3 of the portable terminal 1 In the
acoustic duct 30, the reproduction sound to be emitted is propagated from the inlet hole 23 to
the outlet hole 25. The receiving recess 14 is directed rightward from the inlet 31 (inlet hole 23)
located at the left end of the receiving recess 14 as viewed from the front. A straight portion
extending horizontally to the central portion of the receptacle, and a curved portion extending in
a U-shape along the inner surface of the pedestal 13 viewed from the central portion of the
receiving recess 14 from the central portion of the receiving recess 14 The speaker portion 3 of
the portable terminal 1 is formed in a shape extending to the outlet 32 (outlet hole 25) to avoid
all electronic and electrical parts including the connector socket 18 and the substrate 20 in this
shape. Path to propagate is formed Luo the emitted reproduced sound from the inlet hole 23 to
the outlet hole 25.
02-05-2019
14
[0036]
The acoustic duct 30 provided inside the portable terminal holder main body 11 of the portable
terminal holder 10 according to the first embodiment is also attached to the front case 21 side
like the respective electronic and electric parts.
As shown in FIG. 7, a plurality of bosses 33 for screwing, for example, are formed in the acoustic
duct 30. The acoustic duct 30 is formed of a resin such as ABS.
[0037]
When assembling the portable terminal holder 10 according to the first embodiment, the
substrate 20, the acoustic duct 30, and the rear case 22 are fixed to the front case 21 in this
order with screws and the like.
[0038]
By the way, the portable terminal holder 10 according to the first embodiment is emitted from
the speaker unit 3 of the portable terminal 1 as an acoustic structure that amplifies the
reproduction sound emitted from the speaker unit 3 of the portable terminal 1 without using
electric energy. If a reproduction sound is input, it has a resonance pipe from which the sound of
the frequency which resonates from the outlet 32 is emphasized and comes out, the abovementioned sound duct 30 is the resonance pipe, and in the following, the sound duct It is said.
[0039]
As shown in FIG. 2 to FIG. 7, in the resonance tube 30 provided in the portable terminal holder
10 according to the first embodiment, it extends in a U shape along the inner surface of the
pedestal 13 specifically at the outlet 32 side. In the curved portion, a horn portion 30B having a
forward-spreading shape in which the cross-sectional area continuously increases as going
forward is formed, and the straight portion extending from the inlet 31 becomes the original
resonance pipe portion 30A.
The inlet 31 is provided on the side wall of the pipe near the closed end of the resonance pipe
portion 30A so as to be open on the front side.
02-05-2019
15
Although the resonance pipe portion 30A in the illustrated example is a normal type in which the
cross-sectional area does not change constantly from the inlet 31 to the outlet 32A, the crosssectional area is not constant from the inlet 31 to the outlet 32A (continuously large It may be of
a tapered type with a flared shape. Further, a curved portion that extends in a U-shape along the
inner surface of the pedestal 13 can also be used as the resonance pipe portion 30A. That is, the
resonance tube 30 can also be configured by only the resonance tube portion 30A.
[0040]
On the other hand, in the portable terminal holder 10 according to the first embodiment, the
resonance pipe 30 is provided inside, and when the portable terminal 1 is attached, the portable
terminal 1 is fitted with the speaker unit 3 of the portable terminal 1 and the entrance 31 of the
resonant pipe 30 A portable terminal holder main body 11 is provided as a portable terminal
holding structure for coupling the terminal 1 and the resonance tube 30, and the outlet 32 of the
resonance tube 30 is opened to the outside.
[0041]
Thus, in the portable terminal holder 10 according to the first embodiment having the resonance
pipe 30 and the portable terminal holder main body 11, the reproduction sound emitted from the
speaker unit 3 of the portable terminal 1 when the portable terminal 1 is attached is It can be put
into 30 efficiently.
Then, in the resonance tube portion 30A of the resonance tube 30, reproduction sound emitted
from the speaker portion 3 of the portable terminal 1 enters it, resonance (resonance) occurs in
the tube, and sound of a frequency resonating from the outlet 32 of the resonance tube 30
Because it is emphasized (amplified) and comes out, the emphasized sound becomes audible and
loud. That is, the reproduced sound emitted from the speaker unit 3 of the portable terminal 1
becomes large and easy to hear. Further, in the resonance tube 30, the horn portion 30B is
formed on the outlet 32 side, and the radiation of the sound (the vibration of air) emphasized by
the resonance tube portion 30A of the resonance tube 30 can be efficiently transmitted to the
outside. Since it can be done, the reproduction sound emitted from the speaker unit 3 of the
portable terminal 1 becomes even larger and easier to hear.
[0042]
02-05-2019
16
Further, the resonance tube portion 30A of the resonance tube 30 is formed such that a
resonance frequency appears in a frequency band of about 500 Hz to 5000 Hz. The sensitivity of
the bass is extremely poor due to human hearing characteristics, and the sensitivity of about
2000 Hz to 5000 Hz is very good. For example, according to the frequency characteristics of
about 500 Hz (general speaker unit built in a portable terminal, You can hear the playback sound
from the frequency. By forming the resonance tube portion 30A of the resonance tube 30 that
resonates with the low sound of), it is possible to make bass feel and to further increase the
volume feeling. Further, by forming the resonance tube portion 30A of the resonance tube 30
that resonates with sound in a frequency band of about 2000 Hz to 5000 Hz, it is possible to
further increase the volume feeling.
[0043]
Further, in the case of the resonance tube portion 30A of the resonance tube 30, the resonance
frequency can be determined by the speed of sound: 340 m / sec (4 × the length of the
resonance tube), for example The length is about 170 mm in calculation and slightly exceeds the
height of mobile terminal 1 (about 120 mm to 140 mm), but the height of mobile terminal 1 can
be increased by bending the resonance pipe portion 30A of resonance pipe 30 once. It can be
made to go below. When the resonance tube portion 30A of the resonance tube 30 is bent, the
resonance effect may be weakened. However, in the case of one-time bending, an effect which is
almost the same as when it is not bent once can be obtained. Moreover, the resonance tube
portion 30A of the resonance tube 30 does not have a large spread like the horn portion 30B
even in the tapered type. That is, in the case of the resonance tube 30, an effect can be obtained
in a frequency band higher than about 500 Hz with a small size that fits within the plane area
(horizontal width × height) of the portable terminal 1 with a margin.
[0044]
The overall size of the portable terminal holder 10 according to FIGS. 2 to 4 to the first
embodiment is as wide as the height of the portable terminal 1 and as long as the depth in the
front-rear direction as the lateral width of the portable terminal 1 The mobile terminal holder 10
according to the first embodiment can also be placed and used if the terminal 1 can be placed
flat, that is, the target size of the mobile terminal holder 10 according to the first embodiment is
generally achieved. Further, although the mobile terminal holder main body 11 of the mobile
terminal holder 10 according to the first embodiment also serves as a holder, a stand, and further
02-05-2019
17
a charging stand, the target size of the mobile terminal holder 10 according to the first
embodiment is still Generally achieved.
[0045]
According to the portable terminal holder 10 of the first embodiment, it is possible to secure the
same acoustic performance as the conventional one while reducing the size further than the
conventional one. Moreover, the target size is generally achieved when the target machine is a
smartphone.
[0046]
Moreover, about the acoustic performance of the portable terminal holder 10 by Example 1, it
has confirmed by measurement. FIG. 8 is a frequency characteristic comparison diagram showing
the measurement results of the portable terminal holder 10 according to the first embodiment
shown in FIG. 2 and the portable terminal holder according to the comparative example
(measurement condition: inside the soundless box / front of the portable terminal 1) 200 mm)
(measurement signal: white noise). In the portable terminal holder according to the comparative
example, the portable terminal holder having the same structure as the portable terminal holder
10 according to the first embodiment except that the inlet hole 23, the packing 24, the outlet
hole 25 and the resonance pipe 30 are not provided. Using. As compared with the portable
terminal holder according to the comparative example, the mobile terminal holder 10 according
to the first embodiment can confirm a sound pressure increase of 20 dB at around 2000 Hz. FIG.
8 also shows an analysis result by (computer) simulation of the resonance tube 30 alone using
the analysis model of the resonance tube 30 shown in FIG. 7. As in the measurement results, a
sound pressure increase of 20 dB can be confirmed around 2000 Hz.
[0047]
Further, in the resonance tube 30 provided in the portable terminal holder 10 according to the
first embodiment, three types of resonance tubes P0,... Can be controlled so that the resonance
frequency appears in a specific frequency band by the shape change. It is confirmed by actual
measurement using P1 and P2 and simulation using five types of analysis models.
[0048]
02-05-2019
18
FIG. 9 is a view showing the first to third resonance tubes P1, P2 and P3. FIG. 9 (A) is a
perspective view showing an appearance of the first resonance tube P1, and FIG. 9 (B) is a second
view. FIG. 9C is a perspective view showing the appearance of the third resonance pipe P3.
As shown in FIGS. 9A, 9B, and 9C, the first to third resonance pipes P1, P2, and P3 correspond to
the inlet 31a and the outlet hole 25 corresponding to the inlet hole 23, respectively. The first
resonance pipe part of the first resonance pipe P1 shown in FIG. 9A is composed of first to third
resonance pipe parts 30a, 30b, 30c having different outlets 32a and having different lengths
only. 30a, the resonance pipe portion 30c of the third resonance pipe P3 shown in FIG. 9C, and
the second resonance pipe portion 30b of the second resonance pipe P2 shown in FIG. 9B.
[0049]
FIG. 10 shows the result (without the resonance tube) corresponding to the radiation sound of
the speaker unit 3 of the portable terminal 1 shown in FIG. 1 and the inlet 31a of the first to
third resonance tubes P1, P2 and P3 shown in FIG. Radiated sound from the sound emitting hole
4 of the speaker unit 3 of the portable terminal 1 shown in 1 is input (open circle), and the
frequency characteristic comparison diagram showing the respective results of measuring the
emitted sound from the outlet 32a with a microphone It is. In FIG. 10, a change is seen in the
second peak appearing in the frequency band of 2000 Hz to 5000 Hz by the first resonance
tubes P1, P2 and P3. Specifically, the first resonance pipe P1 is around 4000 Hz, the third
resonance pipe P3 is around 2800 Hz, the second resonance pipe P2 is around 2300 Hz, and the
length of the resonance pipe portion (resonance pipe) from the inlet 31a to the outlet 32a It can
be confirmed that the second peak position is shifted to the lower band as the length of L
increases.
[0050]
FIG. 11 is a frequency characteristic showing the result of comparison of the frequency
characteristics of the first to third resonance pipes P1, P2 and P3 shown in FIG. 9 with the
speaker unit 3 (without the resonance pipe) of the portable terminal 1 shown in FIG. It is a
comparison figure. It can be confirmed from FIG. 11 that the sound pressure is increased in a
specific frequency band by the resonance effect of the first to third resonance pipes P1, P2, P3.
02-05-2019
19
[0051]
FIG. 12 is a frequency characteristic comparison diagram showing the measurement result of the
first resonance pipe P1 shown in FIG. 9A and the analysis result of simulation using an analysis
model. Moreover, FIG. 13 is a frequency characteristic comparison figure which shows the
analysis result of the simulation using the measurement result and analysis model about the 2nd
resonance pipe P2 shown to FIG. 9 (B). From FIG. 12 and FIG. 13, the measurement results and
analysis results of the first and second resonance pipes P1 and P2 substantially agree, and
simulation of the measured characteristics of the first to third resonance pipes P1, P2 and P3 is
possible with high accuracy What can be confirmed.
[0052]
FIG. 14 is a view showing first to fifth analysis models C1, C2, C3, C4 and C5, and FIG. 14 (A) is a
side view showing a first analysis model C1, and FIG. 14 (B) is a view A side view showing the
second analysis model C2, FIG. 14 (C) is a side view showing the third analysis model C3, FIG. 14
(D) is a side view showing the fourth analysis model C4, and FIG. 10 is a side view showing a fifth
analysis model C5. As shown in FIG. 14 (A), the first analysis model C1 is an analysis model of a
resonance tube constituted only by a resonance tube section 30d of a normal type. As shown in
FIG. 14 (B), the second analysis model C2 is a horn portion of a forward-spreading shape in
which the cross-sectional area increases continuously toward the outlet side of the resonance
pipe portion 30d of the first analysis model C1. 30f is an analysis model of a resonance tube in
which 30f is formed, and a resonance tube portion 30e such that the length of the resonance
tube portion 30d of the first analysis model C1 is shortened is provided on the inlet side
(resonance tube portion 30e + Horn 30f). As shown in FIG. 14C, the third analysis model C3 is an
analysis model of a resonance tube in which the spread of the horn portion 30f of the second
analysis model C2 is increased, and the second analysis model C2 is on the outlet side. The horn
portion 30g which is wider than the horn portion 30f is formed, and the resonance pipe portion
30e is provided on the inlet side (resonance pipe portion 30e + horn portion 30g). As shown in
FIG. 14 (D), the fourth analysis model C4 is an analysis model of a resonance pipe in which the
resonance pipe portion 30d of the normal type of the first analysis model C1 is tapered, and is
tapered at the inlet side. A horn portion 30i of the same type as the horn portion 30f of the
second analysis model C2 is formed on the outlet side with the outlet of the resonance tube
portion 30h as an inlet Part 30h + horn part 30i). As shown in FIG. 14E, the fifth analysis model
C5 is an analysis model of a resonance tube in which the length of the resonance tube portion
30d of the first analysis model C1 is increased, and the horn portion 30f is provided on the outlet
side. Is formed, and the inlet side has a resonance tube portion obtained by extending and
enlarging the length of the resonance tube portion 30e to the same length as the resonance tube
02-05-2019
20
portion 30d, that is, the resonance tube portion 30d (resonance tube portion 30d + horn
Department 30f). The first analysis model C1 shown in FIG. 14 (A) corresponds to the resonance
pipe portion 30a shown in FIG. 9, and FIG. 14 (B) corresponds to the resonance pipe 30 shown in
FIG.
[0053]
FIG. 15 is a frequency characteristic comparison diagram respectively showing analysis results of
simulations using the first to fifth analysis models C1, C2, C3, C4 and C5 shown in FIG. From the
comparison of FIG. 15 with the overall length fixed and the presence or absence of the horn (the
length of the resonance tube becomes short), that is, FIG. 14 (B) for the first analysis model C1
shown in FIG. 14 (A). The resonance frequency of the second analysis model C2 shown in FIG. In
addition, in comparison based on the fixed length of the entire length and the spread change of
the horn portion, in other words, the third analysis model C3 shown in FIG. 14C for the second
analysis model C2 shown in FIG. A change is seen in the first resonance frequency. In addition,
the fourth analysis model C4 shown in FIG. 14D has a resonance frequency in comparison with
the second analysis model C2 shown in FIG. The position of has changed. Further, in comparison
by the change of the entire length (the length of the resonance tube becomes longer), that is, the
resonance frequency is higher in FIG. 14 (E) than the second analysis model C2 shown in FIG. 14
(B). It is shifted to the area.
[0054]
From FIG. 9 to FIG. 15 that the resonance tube 30 provided in the portable terminal holder 10
according to the first embodiment was changed in shape, it was confirmed that a change in the
resonance frequency was observed. Then, it was confirmed that it is possible to perform control
in which the resonance frequency appears in a specific frequency band by changing the length
and the inclination.
[0055]
FIG. 16 is a side view of a portable terminal holder as a portable terminal attachment according
to a second embodiment of the present invention, and FIG. 17 is a view showing the portable
terminal holder according to the second embodiment shown in FIG. 18 shows the configuration
as viewed in the direction of arrow X, FIG. 18 shows the configuration as seen in the direction of
02-05-2019
21
arrow Y as shown in FIG. 16, and FIG. 17 shows the internal structure of the portable terminal
holder according to the second embodiment shown in FIG. 16 taken along the line A-A shown in
FIG. 17. FIG. 20 shows the portable terminal holder according to the second embodiment shown
in FIG. It is a figure which shows an internal structure in the state cut | disconnected by the BB
line shown to FIG. In the mobile terminal holder according to the second embodiment, the same
structure as that of the mobile terminal holder according to the first embodiment is denoted by
the same reference numerals and the detailed description is omitted, and different structures will
be described below.
[0056]
In the mobile terminal holder main body 11 of the mobile terminal holder 10 according to the
first embodiment, the receiving recess 14 for the entire mobile terminal 1 is formed on the front
side of the receiving base 12. Thus, the portable terminal 1 can be held while the liquid crystal
screen 2 of the portable terminal 1 stands upright on the back side along the pedestal 12 on the
front side of the pedestal 12 On the other hand, the portable terminal holder main body 41 of the
portable terminal holder 40 according to the second embodiment is, as shown in FIG. 16 to FIG.
14 is not formed, and the pedestal 42 is formed such that the entire front face is located in the
same plane. In addition, on the front side of the receptacle 42, a pocket-shaped receptacle
opened upward and inward with a pair of left and right, instead of the receiving recess 14 of the
entire portable terminal 1 and the pair of left and right hooking parts 15 The portions 43 and 44
are formed in a projecting manner. In the mobile terminal holder main body 41 of the mobile
terminal holder 40 according to the second embodiment, one front lower corner portion of the
mobile terminal 1 in the longitudinal direction with the mobile terminal 1 in the normal
horizontal direction with the liquid crystal screen 2 of the mobile terminal 1 facing front. By
inserting the lower end of the other end in the longitudinal direction of the portable terminal 1
into the other receiving part 43 from the upper side thereof. The mobile terminal 1 can be held
in a state where the liquid crystal screen 2 is erected to the back side along the receiving table
12.
[0057]
Further, in the portable terminal holder main body 41 of the portable terminal holder 40
according to the second embodiment, the pair of charging pins 17 is a pair of charging terminals
of the portable terminal 1 mounted in the normal direction on the front side of the pedestal 42. It
is exposed and arrange | positioned at front 2 places (2 places of a right end seeing from the
front in the example of illustration) upper side from the left-right paired receiving parts 43 and
02-05-2019
22
44 of the receiving stand 42 which opposes 7, and is arrange | positioned. In addition, each
electric / electronic component accommodated in the inside of the portable terminal holder main
body 41 of the portable terminal holder 40 by Example 2, the plug insertion port of the
connector socket arrange | positioned at one side of the pedestal 13 among them, etc. are
illustrated. Is omitted.
[0058]
Further, in the portable terminal holder main body 41 of the portable terminal holder 40
according to the second embodiment, the base 42 and the base 13 constituting the outer shell
integrally form the flat front plate and the peripheral side wall of the base 42. It comprises a
front case 51 opened at the rear side and a rear case 22. The entrance hole 23 is a front surface
above the pair of left and right receiving portions 43 and 44 of the front case 51 facing the
sound emission hole 4 of the speaker unit 3 of the portable terminal 1 mounted on the front side
of the pedestal 42 in a normal direction. It is provided in one place (one place of the left end
seeing from the front in the example of illustration). The outlet hole 25 is a front surface lower
than the pair of left and right receiving portions 43 and 44 of the front case 51, and is a sound
emitting surface located in the same plane as the front upper surface than the pair of left and
right receiving portions 43 and 44 of the front case 51 56 is formed.
[0059]
The portable terminal holder 40 according to the second embodiment includes the inlet 61
provided inside the portable terminal holder main body 41 and connected to the inlet hole 23
and the outlet 62 connected to the outlet hole 25, and the inlet 61 Has a resonance pipe
(acoustic duct) 60 for limiting a path for propagating the reproduced sound radiated from the
inside to the exit hole 25. When the portable terminal 1 is attached, the resonance pipe 60 is
directed to the direction in which the liquid crystal screen 2 of the portable terminal 1 faces. The
exit 62 is facing. The external appearance of the resonance pipe (acoustic duct) provided in the
portable terminal holder 40 according to the second embodiment is shown in a perspective view
of FIG.
[0060]
Inside the portable terminal holder main body 41, the resonance pipe 60 has a shape (path)
avoiding all electronic and electrical parts including a connector socket and a substrate (not
shown) housed together therewith, the speaker unit 3 of the portable terminal 1 Is transmitted
02-05-2019
23
from the inlet 23 to the outlet 25. In the resonance pipe 60, the front plate of the pedestal 42 is
viewed from the inlet 61 (inlet 23) located at the left end of the pedestal 42 as viewed from the
front. Along the inner surface of the front plate of the pedestal 42 on the same plane as the first
linear portion from the central portion of the pedestal 42 and the first linear portion extending
horizontally to the central portion of the pedestal 42 toward the right along the inner surface of
the And a second straight portion extending downward and L-shaped leading to the outlet 62
(outlet hole 25) located on the lower side on the front side of the pedestal 42, and in this shape
all components including connector sockets and substrates not shown. Electronics Avoiding gas
components, the path for propagating the reproduced sound emitted from the speaker unit 3 of
the portable terminal 1 from the inlet port 23 to outlet hole 25 is formed.
[0061]
The resonance tube 60 provided inside the portable terminal holder main body 41 of the
portable terminal holder 40 according to the second embodiment is also attached to the front
case 51 side in the same manner as each electronic / electrical component (not shown).
For example, although a plurality of bosses for screwing are formed in the resonance pipe 60,
illustration is omitted.
[0062]
Incidentally, the portable terminal holder 40 according to the second embodiment is also emitted
from the speaker unit 3 of the portable terminal 1 as an acoustic structure that amplifies the
reproduction sound emitted from the speaker unit 3 of the portable terminal 1 without using
electric energy. If the reproduction sound is input, it has a resonance pipe from which the sound
of the resonance frequency is emphasized and comes out from the outlet 62, and the abovementioned resonance pipe (acoustic duct) 60 is the resonance pipe.
[0063]
As shown in FIGS. 16 to 21, also in the resonance pipe 60 provided in the portable terminal
holder 40 according to the second embodiment, the outlet 62 side, specifically, the center portion
of the cradle 42 is identical to the first straight portion. In the second straight portion extending
downward along the inner surface of the front plate of the receiving table 42 on the plane, a horn
portion 60B of a flared shape whose cross-sectional area continuously increases as it goes ahead
02-05-2019
24
is formed, and an inlet A first straight portion extending horizontally from the center 61 of the
pedestal 42 along the inner surface of the front plate of the pedestal 42 toward the right along
the inner surface of the pedestal 42 becomes the original resonance tubular portion 60A.
The inlet 61 is provided on the side wall of the pipe near the closed end of the resonance pipe
portion 60A so as to be open to the front side. Although the resonance pipe portion 60A in the
illustrated example is a normal type in which the cross-sectional area does not change constantly
from the inlet 61 to the outlet 62A, the cross-sectional area is not constant from the inlet 61 to
the outlet 62A (continuously large It may be of a tapered type with a flared shape. In addition, a
second straight portion extending downward from the central portion of the pedestal 42 along
the inner surface of the front plate of the pedestal 42 on the same plane as the first linear
portion can also be the resonance pipe portion 60A. That is, the resonance pipe 60 can be
configured by only the resonance pipe portion 60A.
[0064]
On the other hand, in the portable terminal holder 40 according to the second embodiment, the
resonance pipe 60 is provided inside, and when the portable terminal 1 is attached, the portable
terminal 1 is fitted with the speaker unit 3 of the portable terminal 1 and the inlet 61 of the
resonance pipe 60 A portable terminal holder main body 41 is provided as a portable terminal
holding structure for coupling the terminal 1 and the resonance tube 60, and the outlet 62 of the
resonance tube 60 is opened to the outside.
[0065]
Thus, in the portable terminal holder 40 according to the second embodiment having the
resonance pipe 60 and the portable terminal holder main body 41, the portable terminal holder
10 according to the first embodiment having the resonance pipe 30 and the portable terminal
holder main body 11 Sound effects similar to
[0066]
22 is a perspective view showing the appearance of a portable terminal holder as an attachment
for a portable terminal according to a third embodiment of the present invention, and FIG. 23 is a
partial view of the external appearance of the portable terminal holder according to the third
embodiment shown in FIG. FIG. 24 is a front view shown by a dot-and-dash line, and FIG. 24 is a
view showing an internal structure in a state where the portable terminal according to the third
embodiment shown in FIG.
02-05-2019
25
In the mobile terminal holder according to the third embodiment, the same structure as that of
the mobile terminal holder according to the first embodiment is denoted by the same reference
numerals and the detailed description is omitted, and different structures will be described
below.
[0067]
The resonance tube of the portable terminal holder 10 according to the first embodiment is a
resonance pipe (acoustic duct) 30 configured separately from the portable terminal holder main
body 11, whereas the portable terminal holder according to the third embodiment is As shown in
FIGS. 22 to 24, the resonance pipe 70 is a resonance pipe (acoustic duct) 80 configured by using
a part of the portable terminal holder main body 71.
[0068]
In the mobile terminal holder main body 71 of the mobile terminal holder 70 according to the
third embodiment, the receiving recess 14 and the sound emitting surface 76 of the entire
mobile terminal 1 are formed on the front side of the receiving base 72 of the mobile terminal
holder main body 71. There is.
The first groove 77 and the second groove 77 are formed on the bottom surface 73 and the
lower side wall surface 74 of the receiving recess 14 which is a mounting surface for mounting
the portable terminal 1 among the front sides of the pedestal 72 of the portable terminal holder
main body 71. A groove consisting of a groove 78 is provided.
The first groove 77 is provided on the bottom surface 73 of the receiving recess 14 and is
formed in a concave shape opening on the front side. The second groove 78 is provided on the
lower side wall surface 74 of the receiving recess 14 and is formed in a concave shape opening
upward. The second groove 78 is further formed so as to be continuous with the first groove 77
on the bottom surface 73 side of the receiving recess 14 and to form a notch 79 at the center of
the sound emitting surface 76. The second groove 78 is exposed to the outside on the front side
by the notch 79.
[0069]
02-05-2019
26
In addition, an entrance hole 23 is provided on the front side of the holder 72 of the portable
terminal holder main body 71. The entrance hole 23 is provided at one end of the first groove
77, and is a receptacle facing the sound emission hole 4 of the speaker unit 3 of the portable
terminal 1 mounted on the mounting surface in the normal direction on the front side of the
pedestal 72. It is arranged at one place (one place near the right end when viewed from the front
in the illustrated example) at one of the upper and lower middle parts of the front side (bottom
surface 73 of the receiving recess 14) of the stand 72. A packing for sealing between the
portable terminal holder main body 71 and the portable terminal 1 when the portable terminal 1
is mounted may be provided around the opening surface of the entrance hole 23 or the like.
[0070]
In addition, the portable terminal holder 70 according to the third embodiment is provided in the
portable terminal holder main body 71, has an inlet 81 connected to the inlet hole 23, and an
outlet 82, and the reproduced sound radiated to the inside from the inlet 81 And the outlet 82 of
the resonance tube 80 in the direction of the liquid crystal screen 2 of the portable terminal 1
when the portable terminal 1 is attached. The resonance tube 80 is configured using the portable
terminal holder main body 71 and the cover 85, and is formed by attaching the cover 85 to the
receiving base 72 of the portable terminal holder main body 71.
[0071]
The cover 85 forms an inlet 81 and an outlet 82 in cooperation with the first groove 77 and the
second groove 78 and covers the first groove 77 and the second groove 78 so as to open the
inlet 81 and the outlet 82 to the outside. It is attached to the bottom surface 73 and the lower
side wall surface 74 of the receiving recess 14. The cover 85 is made of resin or the like, and is
formed in a film shape, a sheet shape, or a plate shape. The cover 85 has a first cover portion
airtightly attached to the bottom surface 73 of the receiving recess 14 and a second cover
portion airtightly attached to the lower side wall surface 74 of the receiving recess 14, and has
an L shape It is assumed. The cover 85 in the illustrated example is in the form of a film and the
peripheral edge portions of the first cover portion and the second cover portion are respectively
disposed on the bottom surface 73 and the lower side wall surface 74 of the receiving recess 14.
A step is formed on the opening peripheral edge of the two groove 78, and the first cover portion
and the second cover portion are flush with the bottom surface 73 and the lower side wall
surface 74 of the receiving recess 14 respectively. The peripheral portions of the cover portion
02-05-2019
27
and the second cover portion may be installed on this step. Further, although the cover 85 in the
illustrated example is configured by integrally connecting the first cover portion and the second
cover portion, the cover 85 may be configured by the first cover portion and the second cover
portion which are separate from each other. Good.
[0072]
The resonance tube 80 propagates the reproduction sound emitted from the speaker unit 3 of
the portable terminal 1 from the inlet 81 to the outlet 82 through the inside of the first groove
77 and the second groove 78 covered by the cover 85. In the resonance pipe 80, a first straight
portion extending substantially horizontally to the central portion of the receiving recess 14 from
the inlet 81 (inlet hole 23) located in the vicinity of the right end of the pedestal 72 as viewed
from the front, and the pedestal A second straight portion extending downward from the central
portion of the base portion 72 in the same plane as the first straight portion and a third straight
portion extending forward from the lower portion of the receiving base 72 It has a bent shape
leading to the located outlet 82, and in this shape, a path for propagating the reproduced sound
emitted from the speaker unit 3 of the portable terminal 1 from the inlet 81 to the outlet 82 is
formed.
[0073]
Incidentally, the portable terminal holder 70 according to the third embodiment is also emitted
from the speaker unit 3 of the portable terminal 1 as an acoustic structure that amplifies the
reproduction sound emitted from the speaker unit 3 of the portable terminal 1 without using
electric energy. If the reproduction sound is input, it has a resonance pipe from which the sound
of the resonance frequency is emphasized and comes out from the outlet 82, and the abovementioned resonance pipe (acoustic duct) 80 is the resonance pipe.
[0074]
As shown in FIGS. 22 to 24, in the resonance tube 80 provided in the portable terminal holder 70
according to the third embodiment as well, specifically at the outlet 82 side, the same as the first
straight portion from the central portion of the pedestal 42. A second straight portion extending
downward on the plane is formed with a horn portion 80B having a forward-broadening shape in
which the cross-sectional area increases continuously as it goes ahead, and the center of the
receiving recess 14 from the inlet 81 toward the left side. The first straight portion extending
substantially horizontally to the portion becomes the original resonance pipe portion 80A.
02-05-2019
28
The outlet 82 is in communication with the horn 80B via an open portion 80C formed in the
third straight portion so as to have a width substantially the same as the wide end of the horn
80B.
The resonance tube 80A in the illustrated example is a normal type in which the cross-sectional
area does not change constantly from the inlet 81 to the outlet 82A of the resonance tube 80A,
but the cross-sectional area is not constant from the inlet 81 to the outlet 82A. It may be of a
tapered type with a flared shape (which increases continuously). Further, the second straight
portion and the third straight portion can also be used as the resonance pipe portion 80A. That
is, the resonance tube 80 can be configured only by the resonance tube portion 80A.
[0075]
On the other hand, the portable terminal holder 70 according to the third embodiment is
provided with the resonance tube 80, and when the portable terminal 1 is attached, the portable
terminal 1 is fitted with the speaker unit 3 of the portable terminal 1 and the inlet 81 of the
resonant pipe 80 The portable terminal holder main body 71 is provided as a portable terminal
holding structure for coupling the sensor and the resonance pipe 80, and the outlet 82 of the
resonance pipe 80 is opened to the outside.
[0076]
Thus, in the portable terminal holder 70 according to the third embodiment having the
resonance pipe 80 and the portable terminal holder main body 71, the portable terminal holder
10 according to the first embodiment having the resonance pipe 30 and the portable terminal
holder main body 11 Sound effects similar to
[0077]
The first, second, and third embodiments of the mobile terminal holder as the mobile terminal
attachment according to the present invention have been described above, but the present
invention is not limited to the first, second, and third embodiments. It can be suitably changed
within the scope of the invention indicated to the range.
[0078]
DESCRIPTION OF SYMBOLS 1 mobile terminal (smart phone) 2 screen 3 speaker part 7 terminal
for charge 10, 40, 70 mobile terminal holder (accessory for mobile terminal) 11, 41, 71 mobile
terminal holder main body 17 charge pin 30, 60, 80 resonance tube 31, 61, 81 Inlet 32, 62, 82
Outlet 30B, 60B, 80B Horn part
02-05-2019
29
02-05-2019
30
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