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DESCRIPTION JP2013243505

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DESCRIPTION JP2013243505
Abstract: The present invention provides an electronic device that can be suitably used for an
electronic device of a type in which a panel attached to a housing is vibrated. A piezoelectric
element, a panel on which the piezoelectric element is fixed, which is vibrated by the
piezoelectric element to generate an air-conducted sound and an oscillating sound transmitted by
vibrating a part of a human body, and a case for supporting the panel Noise and echo collected
by the microphone are reduced by the electronic device having the sound collecting unit having
the body, the duct communicating from the surface of the housing to the inside, and the
microphone disposed in the inside. [Selected figure] Figure 3
Electronics
[0001]
The present invention is an electronic apparatus that vibrates a panel by applying a
predetermined electric signal (sound signal) to a piezoelectric element and transmits air
conduction noise and vibration noise to a user by transmitting vibration of the panel to a human
body. About.
[0002]
Patent Document 1 describes an electronic device such as a mobile phone that transmits airconduction sound and bone-conduction sound to a user.
14-04-2019
1
Further, in Patent Document 1, air conduction sound is a sound transmitted to the eardrum by
the vibration of the air caused by the vibration of the object through the ear canal and vibrating
the eardrum. Have been described. Patent Document 1 also describes that bone conduction
sound is sound transmitted to the user's auditory nerve through a part of the user's body (for
example, the cartilage of the outer ear) that contacts the vibrating object. ing.
[0003]
In the telephone set described in Patent Document 1, it is described that a short plate-shaped
vibrator made of a piezoelectric bimorph and a flexible material is attached to the outer surface
of a housing through an elastic member. In addition, according to Patent Document 1, when a
voltage is applied to the piezoelectric bimorph of the vibrator, the vibrator bends and vibrates as
the piezoelectric material stretches and contracts in the longitudinal direction, and the user
brings the vibrator into contact with the pinna It is described that air conduction noise and
vibration noise are transmitted to the user.
[0004]
JP 2005-348193 A
[0005]
In the electronic device described in Patent Document 1, a vibrator is attached to the outer
surface of a housing such as a mobile phone.
Therefore, no consideration has been given to the problem when the panel attached to the
housing is vibrated.
[0006]
An object of the present invention is to provide an electronic device of a type that vibrates a
panel attached to a housing that can be suitably used.
[0007]
An electronic device according to the present invention includes a piezoelectric element, a panel
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on which the piezoelectric element is fixed, which is vibrated by the piezoelectric element to
generate air-conducted sound and vibration sound transmitted by vibrating a part of the human
body, and the panel It is characterized by having a sound collection part which has a case to
support, a duct connected to the inside from the surface of the case, and a microphone arranged
in the inside.
[0008]
The sound collection unit may have an opening of the duct in an area other than the panel on the
surface of the housing.
In addition, the sound collection unit may have an opening of the duct on a surface of the surface
of the housing intersecting the panel.
[0009]
The housing may include a first member supporting the panel, and a second member different
from the first member to which the sound collecting unit is attached.
[0010]
The sound collecting unit may be disposed on a second side opposite to the first side on which
the piezoelectric element is disposed in a plan view of the housing.
[0011]
The length in the direction from the side on which the piezoelectric element is disposed to the
opposite side in a plan view of the panel is preferably equal to or greater than the length from
the antitragus to the lower leg of the anulus.
In addition, the length in the direction intersecting with the direction may be equal to or greater
than the length from the tragus to the ankle.
[0012]
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The piezoelectric element may be bonded to the panel by a bonding member.
Further, the bonding member may be a non-heat curable adhesive or a double-sided tape.
[0013]
The panel may be joined to the housing by a joining member.
Further, the bonding member may be a non-heat curable adhesive or a double-sided tape.
[0014]
The panel may have a display unit disposed closer to the microphone from a fixed position of the
piezoelectric element in plan view.
[0015]
The panel may form part or all of any of a display unit, an input unit, and a cover of the display
unit.
[0016]
The bonding portion of the piezoelectric element in the panel may be located outside an
overlapping area of the panel and a display unit.
[0017]
The panel may form part or all of any of a display unit, an input unit, and a cover of the display
unit.
[0018]
According to the present invention, it is possible to provide an electronic device of a type that
can be suitably used and which vibrates a panel attached to a housing.
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[0019]
It is a figure which shows the functional block of the electronic device which concerns on one
Embodiment of this invention.
It is a figure which shows the suitable shape of a panel.
It is a figure which shows the mounting structure of the electronic device which concerns on 1st
Embodiment.
It is a figure which shows an example of a vibration of the panel of the electronic device which
concerns on 1st Embodiment.
It is a figure which shows the mounting structure of the electronic device which concerns on 2nd
Embodiment.
It is a figure which shows an example of a vibration of the panel of the electronic device which
concerns on 2nd Embodiment. It is a figure which shows the example of joining of a panel and a
housing | casing.
[0020]
Hereinafter, embodiments of the present invention will be described in detail with reference to
the drawings. FIG. 1 is a diagram showing functional blocks of an electronic device 1 according
to an embodiment of the present invention. The electronic device 1 is, for example, a mobile
phone (smart phone), and includes a panel 10, a display unit 20, a piezoelectric element 30, an
input unit 40, a microphone 42, a communication unit 44, and a control unit 50. .
[0021]
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The panel 10 is a touch panel that detects a touch, a cover panel that protects the display unit
20, or the like. The panel 10 is formed of, for example, glass or a synthetic resin such as acrylic.
The shape of the panel 10 may be plate-like. The panel 10 may be a flat plate, or may be a
curved panel with a smooth surface. When the panel 10 is a touch panel, the panel 10 detects a
touch of a user's finger, a pen, a stylus pen, or the like. As a detection method of the touch panel,
any method such as a capacitance method, a resistance film method, a surface acoustic wave
method (or an ultrasonic method), an infrared method, an electromagnetic induction method, and
a load detection method can be used.
[0022]
The display unit 20 is a display device such as a liquid crystal display, an organic EL display, or
an inorganic EL display. The display unit 20 is provided on the back of the panel 10. The display
unit 20 is disposed on the back of the panel 10 by a bonding member (for example, an adhesive).
The display unit 20 may be disposed apart from the panel 10 and may be supported by the
housing of the electronic device 1. Alternatively, in a preferred example, the display unit 20 is
bonded to the back surface of the panel 10 by a bonding member (for example, an adhesive). The
bonding member is, for example, an elastic resin such as photoelastic resin in which the
refractive index of light to be transmitted is controlled. The display unit 20 transmits various
types of information through the adhesive member and the panel 10. By bonding the display unit
20 to the back surface of the panel 10, the amount of attenuation of vibration of the panel 10
can be adjusted as described later.
[0023]
The piezoelectric element 30 is an element that expands and contracts or bends according to the
electromechanical coupling coefficient of the constituent material by applying an electric signal
(voltage). As these elements, for example, those made of ceramic or quartz are used. The
piezoelectric element 30 may be a unimorph, bimorph or stacked piezoelectric element. The
laminated piezoelectric element includes a laminated bimorph element in which bimorphs are
laminated (for example, 16 layers or 24 layers are laminated). The laminated piezoelectric
element is formed of a laminated structure of, for example, a plurality of dielectric layers made of
PZT (lead zirconate titanate) and an electrode layer disposed between the plurality of dielectric
layers. Unimorphs expand and contract when an electric signal (voltage) is applied, and bimorph
bends when an electric signal (voltage) is applied.
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[0024]
The piezoelectric element 30 is disposed on the back surface of the panel 10 (the surface on the
inner side of the electronic device 1). The piezoelectric element 30 is attached to the panel 10 by
a bonding member (for example, double-sided tape). The piezoelectric element 30 may be
attached to the panel 10 via an intermediate member (for example, a sheet metal). The
piezoelectric element 30 is spaced apart from the surface on the inner side of the housing 60 by
a predetermined distance in a state of being disposed on the back surface of the panel 10. It is
preferable that the piezoelectric element 30 be separated from the surface on the inner side of
the housing 60 by a predetermined distance even in a state of expansion and contraction or
bending. That is, the distance between the piezoelectric element 30 and the surface on the inner
side of the housing 60 may be larger than the maximum amount of deformation of the
piezoelectric element 30.
[0025]
The input unit 40 receives an operation input from the user, and includes, for example, operation
buttons (operation keys). When the panel 10 is a touch panel, the panel 10 can also receive an
operation input from the user by detecting a touch from the user.
[0026]
The control unit 50 is a processor that controls the electronic device 1. The control unit 50
applies a predetermined electric signal (a voltage corresponding to the audio signal) to the
piezoelectric element 30. The voltage applied to the piezoelectric element 30 by the control unit
50 is, for example, ± 15 V, which is higher than ± 5 V which is an applied voltage of a so-called
panel speaker for the purpose of sound conduction by air conduction sound instead of vibration
sound. You may As a result, even when the user presses the panel 10 against his / her body with
a force of 3 N or more (for example, 5 N to 10 N), the panel 10 generates sufficient vibration to
cause one of the user's body Vibration noise can be generated through the unit. The level of
applied voltage can be appropriately adjusted according to the fixed strength of the panel 10 to
the housing or the support member or the performance of the piezoelectric element 30. When
the control unit 50 applies an electrical signal to the piezoelectric element 30, the piezoelectric
element 30 stretches or bends in the longitudinal direction. At this time, the panel 10 to which
the piezoelectric element 30 is attached is deformed according to the expansion or contraction or
bending of the piezoelectric element 30, and the panel 10 vibrates. Therefore, the panel 10
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generates an air conduction sound, and also generates an oscillating sound through the body
part when the user contacts the body part (for example, the cartilage of the outer ear). For
example, the control unit 50 causes the piezoelectric element 30 to apply an electrical signal
corresponding to the voice signal related to the voice of the other party received by the
communication unit 44 to generate air conduction noise and vibration noise corresponding to
the voice signal. it can. The audio signal may be related to a ring tone, music including music, and
the like. Note that the audio signal relating to the electrical signal may be based on music data
stored in the internal memory of the electronic device 1, or music data stored in an external
server or the like is reproduced via the network. May be
[0027]
The communication unit 44 receives a baseband signal from the electronic device of the other
party of the call by wireless communication, and extracts an audio signal. The extracted audio
signal is output from the panel 10 as air conduction sound or vibration sound by the control unit
50. The communication unit 44 also converts an audio signal collected by the microphone 42
(for example, a call voice emitted by the user) into a baseband signal, and transmits the baseband
signal to the electronic device of the other party.
[0028]
The panel 10 vibrates not only in the mounting area where the piezoelectric element 30 is
mounted, but also in the area away from the mounting area. The panel 10 has a plurality of
points vibrating in a direction intersecting the main surface of the panel 10 in the vibrating area,
and the value of the vibration amplitude changes from positive to negative with time in each of
the plurality of points. Or it changes in the opposite way. At a certain moment, the panel 10
vibrates in such a manner that the relatively large part of the vibration amplitude and the
relatively small part of the vibration seem to be randomly or periodically distributed in a wide
area of the panel 10. That is, vibration of a plurality of waves can be detected over a wide area
(for example, substantially the entire area) of the panel 10. Even if the user presses the panel 10
against his / her body with a force of, for example, 5N to 10N, the controller 50 controls the
piezoelectric element 30 so that the above-described vibration of the panel 10 does not
attenuate. The applied voltage may be ± 15V. Therefore, the user can hear the sound by
bringing the ear into contact with the area away from the mounting area of the panel 10
described above.
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[0029]
Here, the panel 10 may be approximately the same size as the user's ear. Also, as shown in FIG. 2,
the panel 10 may be larger than the user's ear. In this case, when the user listens to the sound,
the entire ear is easily covered by the panel 10 of the electronic device 1, so ambient noise
(noise) can be made less likely to enter the ear canal. The panel 10 is wider than a region having
a length corresponding to the distance from the lower ear ring (lower leg) to the anti tragus and
a width corresponding to the distance from the tragus to the anti-ear wheel Should vibrate. The
panel 10 preferably has a length corresponding to the distance from the portion near the upper
ear ring leg (upper upper wheel leg) to the ear lobe in the ear ring, and the distance between the
portion from the tragus to the portion near the anti ear ring in the ear ring A region having a
width corresponding to H may vibrate. Here, the longitudinal direction is the longitudinal
direction 2a in which the panel 10 extends, and the piezoelectric element 30 is disposed closer to
one end from the center thereof. Moreover, the width direction is a direction 2b orthogonal to
the longitudinal direction.
[0030]
The region having such length and width may be a rectangular region, or may be an elliptical
shape having the above length as the major axis and the above width as the minor axis. The
average size of Japanese ears can be known by referring to the Japanese Human Body Size
Database (1992-1994) prepared by the Human Life Engineering Research Center (HQL). If the
size of the panel 10 is larger than the average size of Japanese ears, the panel 10 is considered to
be a size that can cover almost the entire foreign ears. By having the size and shape as described
above, the panel 10 can cover the user's ear and is tolerant of displacement when placed on the
ear.
[0031]
The electronic device 1 described above can transmit the air conduction sound and the vibration
sound through a part of the user's body (for example, the cartilage of the outer ear) to the user
by the vibration of the panel 10. Therefore, when outputting a sound having a volume equivalent
to that of a conventional dynamic receiver, the sound transmitted to the surroundings of the
electronic device 1 due to the vibration of air due to the vibration of the panel 10 is smaller than
that of the dynamic receiver. Therefore, it is suitable, for example, when listening to a recorded
message on a train or the like.
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[0032]
In addition, since the electronic device 1 described above transmits the vibration sound by the
vibration of the panel 10, for example, even if the user wears earphones or headphones, the user
can contact the electronic device 1 by contacting them. You can hear the sound through
headphones and body parts.
[0033]
The electronic device 1 described above transmits a sound to the user by the vibration of the
panel 10.
Therefore, when the electronic device 1 does not separately include a dynamic receiver, it is not
necessary to form an opening (sound outlet) for sound transmission in the housing, and the
waterproof structure of the electronic device 1 can be simplified. In addition, when the electronic
device 1 is equipped with a dynamic receiver, it is good for the sound emission port to be
obstruct | occluded by the member which allows gas but does not allow liquid. The part that is
permeable to gas but not liquid is, for example, Gore-Tex®.
[0034]
First Embodiment FIG. 3 is a view showing a mounting structure of an electronic device 1
according to a first embodiment. Fig.3 (a) is a front (front) figure, FIG.3 (b) is sectional drawing
along the bb line in FIG. 3 (a). The electronic device 1 shown in FIGS. 3A and 3B is a smartphone
in which a touch panel that is a glass plate as the panel 10 is disposed on the front surface of a
housing 60 (for example, a case of metal or resin). The panel 10 and the input unit 40 are
supported by the housing 60, and the display unit 20 and the piezoelectric element 30 are
bonded to the panel 10 by the bonding members 70, respectively. The bonding member 70 is an
adhesive having thermosetting or ultraviolet curing properties, a double-sided tape, or the like,
and may be, for example, an optical elastic resin which is a colorless and transparent acrylic
ultraviolet curing adhesive. The panel 10, the display unit 20, and the piezoelectric element 30
each have a substantially rectangular shape. The control unit 50 is mounted on a circuit board
50 a provided on the back side of the panel 10 and the display unit 20. In FIG. 3, the
communication unit 44 is not shown.
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[0035]
The display unit 20 is disposed substantially at the center of the panel 10 in the lateral direction.
The piezoelectric element 30 is disposed at a predetermined distance from an end in the
longitudinal direction of the panel 10, and in the vicinity of the end such that the longitudinal
direction of the piezoelectric element 30 is along the short side of the panel 10. The display unit
20 and the piezoelectric element 30 are arranged side by side in a direction parallel to the
surface on the inner side of the panel 10.
[0036]
The microphone 42 is mounted on the circuit board 50 a in the housing 60. The microphone 42
is covered by the noise barrier 32 around its periphery. The sound insulation wall 32 is made of,
for example, rubber, and forms a duct 32a communicating with the sound passage hole 42a. The
sound passing holes 42 a are provided on the bottom surface of the housing 60, that is, on the
surface intersecting the front surface on which the panel 10 is provided. The sound passing hole
42a is waterproofed by a waterproof sheet (for example, Gore-Tex (registered trademark)) which
is not shown. The microphone 42 collects an external sound through the sound passing hole 42 a
and the duct 32 a. The microphone 42 and the duct 32a constitute a "sound collection unit" in
the present embodiment.
[0037]
By arranging the microphone 42 in the duct 32 a, when the panel 10 is vibrated by the
piezoelectric element 30, the air conduction sound transmitted from the panel 10 into the
housing 60 is shielded by the sound insulation wall 32 and is hardly transmitted to the
microphone 42. In addition, sound transmission holes 32a communicating with the ducts 32 are
provided on the bottom surface of the housing 60, so that vibrations transmitted from the panel
10 to the periphery of the sound transmission holes 42a through the housing 60 are transmitted
through the sound transmission holes 42a. It is attenuated more than when it is provided in front
of the Therefore, it is possible to suppress abnormal noise generated by the vibration of the
housing 60 and sound leakage of the call voice, and to reduce noise and sound return (echo) of
the call voice collected by the microphone 42.
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[0038]
Moreover, in a preferable aspect, the housing | casing 60 is comprised combining the 1st
member 62 to which the panel 10 is attached, and the 2nd member 64 of another part. For
example, in the example of FIGS. 3A and 3B, the upper case including the front surface is an
example of the first member 62, and the rear case including the rear surface is an example of the
second member 64. In such a configuration, the sound collection hole 42a of the sound collection
unit is disposed on the second member 64 side, that is, the rear case side. With this
configuration, when the vibration of the panel 10 is transmitted from the first member 62 to the
discontinuous second member 64, the vibration is more attenuated than when transmitted
through one continuous member. Therefore, the vibration of the case in the vicinity of the sound
passing hole 42a can be suppressed, and the noise collected by the microphone 42 and the
sound return (echo) of the speech can be reduced.
[0039]
FIG. 4 is a view showing an example of the vibration of the panel 10 of the electronic device 1
according to the first embodiment. In the electronic device 1 according to the first embodiment,
the piezoelectric element 30 is provided on the top of the panel 10, and the display unit 20 is
attached to the panel 10. Therefore, the lower portion of the panel 10 is less likely to vibrate
than the upper portion of the panel 10 to which the piezoelectric element 30 is attached.
Therefore, in the lower part of the panel 10, sound leakage due to the vibration of the lower part
of the panel 10 can be reduced. Further, by providing a sound collecting portion having a duct
32a and a microphone 42 on the lower side of the panel 10, the vibration in the panel 10 is
attenuated as it approaches the position of the microphone 42 and the sound passing hole 42a
beyond it. Can. As a result, noise and echo collected by the microphone 42 can be reduced.
[0040]
As described above, according to the electronic device 1 according to the present embodiment,
the panel 10 is deformed due to the deformation of the piezoelectric element 30 attached to the
back surface of the panel 10, and the object contacts the deformed panel 10. In addition, air
conduction sound and vibration sound are transmitted. As a result, air conduction noise and
vibration noise can be transmitted to the user without causing the vibrating body to protrude to
the outer surface of the housing 60, so that a very small vibrating body is brought into contact
with the human body as compared to the housing. The usability is improved more than the
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electronic device described in 1. Further, since it is not necessary to put the user's ear on the
piezoelectric element itself, the piezoelectric element 30 itself is unlikely to be damaged. In the
case where the case 60 is deformed instead of the panel 10, the user is likely to drop the
terminal when generating the vibration, but when the panel 10 is vibrated, such a case is caused.
It is hard to happen.
[0041]
The piezoelectric element 30 is bonded to the panel 10 by a bonding member 70. Thus, the
piezoelectric element 30 can be attached to the panel 10 in a state in which the freedom of
deformation of the piezoelectric element 30 is not easily inhibited. Further, the bonding member
70 can be made of a non-heat curable adhesive. This has the advantage that thermal stress
contraction is less likely to occur between the piezoelectric element 30 and the panel 10 during
curing. Further, the bonding member 70 can be a double-sided tape. As a result, there is an
advantage that the contraction stress as in use of the adhesive is unlikely to be applied between
the piezoelectric element 30 and the panel 10.
[0042]
Second Embodiment FIG. 5 is a view showing a mounting structure of an electronic device 1
according to a second embodiment. 5 (a) is a front (front) view, FIG. 5 (b) is a cross-sectional view
taken along the line b-b in FIG. 5 (a), and FIG. 5 (c) is a line c-c in FIG. 5 (a) It is sectional drawing
along. The electronic device 1 shown in FIG. 5 is a foldable mobile phone in which a cover panel
(for example, an acrylic plate) for protecting the display unit 20 as the panel 10 is disposed on
the front surface of the upper case 60. In the second embodiment, a reinforcing member 80 is
disposed between the panel 10 and the piezoelectric element 30. The reinforcing member 80 is a
plate made of resin, for example, a plate made of resin, or a plate made of resin or glass fiber.
That is, the electronic device 1 according to the second embodiment has a structure in which the
piezoelectric element 30 and the reinforcing member 80 are bonded by the bonding member 70,
and the reinforcing member 80 and the panel 10 are bonded by the bonding member 70.
Further, in the second embodiment, the display unit 20 is supported not by the panel 10 but by
the housing 60. That is, in the electronic device 1 according to the second embodiment, the
display unit 20 is separated from the panel 10, and the display unit 20 and the support unit 90
which is a part of the housing 60 are bonded by the bonding member 70. It is a structure. In
addition, the support part 90 is not limited to the structure as a part of housing | casing 60, It is
possible to comprise as a member independent of the housing | casing 60 by metal, resin, etc.
FIG.
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[0043]
In the second embodiment, the microphone 42 is provided on the back side of the operation
button of the input unit 40. In this example, the sound transmission hole 42a is provided, for
example, on the side surface of the housing 60, and the sound insulation wall 32 covering the
microphone 42 forms a duct 32a communicating with the sound transmission hole 42. According
to such a configuration, when the panel 10 is vibrated by the piezoelectric element 30, the
vibration is attenuated toward the lower portion of the panel 10. Therefore, the vibration is
generated in the housing 60 due to the vibration of the panel 10. It is possible to suppress
abnormal noise and sound leakage of the call voice, and it is possible to reduce noise and voice
return (echo) of the call voice collected by the microphone 42 in the duct 32a through the sound
passage holes 42a.
[0044]
FIG. 6 is a view showing an example of the vibration of the panel 10 of the electronic device 1
according to the second embodiment. In the electronic device 1 according to the second
embodiment, the panel 10 is an acrylic plate having a rigidity lower than that of the glass plate,
and the display unit 20 is not adhered to the back surface of the panel 10. The amplitude
generated by the piezoelectric element 30 is larger than that of the electronic device 1 according
to the first embodiment. Moreover, the panel 10 vibrates not only in the attachment area where
the piezoelectric element 30 is attached but also in an area away from the attachment area.
Therefore, in addition to airborne sound through the air, the user can touch the ear to an
arbitrary position of the panel 10 to hear vibration sound.
[0045]
Thus, according to the electronic device 1 according to the present embodiment, the reinforcing
member 80 and the panel 10 are deformed due to the deformation of the piezoelectric element
30 attached to the panel 10 via the reinforcing member 80, and the deformation is performed.
The air conduction sound and the vibration sound are transmitted to the object contacting the
panel 10. Thereby, the air conduction sound and the vibration sound can be transmitted to the
user without putting the vibrator itself on the ear. Also, the piezoelectric element 30 is attached
to the surface of the panel 10 on the inner side of the housing 60. Therefore, the air conduction
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noise and the vibration noise can be transmitted to the user without causing the vibrating body
to protrude from the outer surface of the housing 60. In addition, deformation occurs in the
panel 10 not only in the mounting area where the piezoelectric element 30 is attached, but also
in any portion of the panel 10 for transmitting the air conduction sound and the vibration sound.
Therefore, in addition to airborne sound through the air, the user can touch the ear to an
arbitrary position of the panel 10 to hear vibration sound.
[0046]
Further, by arranging the reinforcing member 80 between the piezoelectric element 30 and the
panel 10, for example, when an external force is applied to the panel 10, the external force may
be transmitted to the piezoelectric element 30 and the piezoelectric element 30 may be damaged.
It can be reduced. Further, even if the panel 10 is in strong contact with the human body, the
vibration of the panel 10 can be hardly damped. Further, by arranging the reinforcing member
80 between the piezoelectric element 30 and the panel 10, the resonance frequency of the panel
10 is lowered, and the acoustic characteristics in the low frequency band are improved. In place
of the reinforcing member 80, a plate-like weight may be attached to the piezoelectric element
30 by the joining member 70.
[0047]
Although the present invention has been described based on the drawings and examples, it
should be noted that those skilled in the art can easily make various changes and modifications
based on the present disclosure. Therefore, it should be noted that these variations and
modifications are included in the scope of the present invention. For example, it is possible to
rearrange the components, the functions included in each step, etc. so as not to be logically
contradictory, and it is possible to combine or divide a plurality of components or steps into one.
is there.
[0048]
For example, as shown in FIG. 7, the panel 10 may be joined to the housing 60 by the joining
member 70. As described above, by making it difficult for the vibration from the panel 10 to be
transmitted directly to the housing 60, the risk of the user dropping the electronic device 1 can
be reduced as compared with the case where the housing itself vibrates largely. Further, the
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bonding member 70 can be made of a non-heat curable adhesive. This has the advantage that
thermal stress shrinkage is less likely to occur between the housing 60 and the panel 10 during
curing. Further, the bonding member 70 can be a double-sided tape. As a result, there is an
advantage that contraction stress as in the use of an adhesive is less likely to occur between the
housing 60 and the panel 10.
[0049]
For example, when the panel 10 and the display unit 20 do not overlap, the piezoelectric element
30 may be disposed at the center of the panel 10. When the piezoelectric element 30 is disposed
at the center of the panel 10, the vibration of the piezoelectric element 30 is uniformly
transmitted to the entire panel 10 to improve the quality of the air conduction sound, or the user
can listen to various positions of the panel 10 The vibration noise can be recognized even by
touching it. As in the above-described embodiment, a plurality of piezoelectric elements 30 may
be mounted.
[0050]
In the first and second embodiments, in the case where the panel is disposed in the front of the
housing, the sound transmission hole is provided on the bottom or the side of the housing, but
the position of the sound transmission hole is For example, it may be provided on the back of the
housing. In addition, although the case of the rectangular shape is shown as an example, the
shape of the case may be other than the rectangular shape, for example, a flat elliptical shape or
the like. In the above description, an example is shown in which the sound transmission hole is
provided in a plane (housing bottom or side) orthogonal to the plane (housing front) on which
the panel is provided. It is not limited, nor is it limited to the case of crossing in a straight line. In
other words, when the housing has a curved surface, a sound passing hole is provided in a plane
intersecting with a flat surface on which the panel is provided or a tangent to the curved surface,
or Also in the case where the sound passing hole is provided in the curved surface having the [1],
it is included in the first and second embodiments.
[0051]
Moreover, in the above-described electronic device 1, the piezoelectric element 30 is attached to
the panel 10, but may be attached to a place different from the panel 10. For example, the
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piezoelectric element 30 may be attached to the battery lid attached to the housing 60 and
covering the battery. Since the battery lid is often attached to a surface different from the panel
10 in the electronic device 1 such as a portable telephone, according to such a configuration, the
user can use a part of the body (for example, an ear) on the surface different from the panel 10
You can hear it by touching it.
[0052]
In addition, the panel 10 can constitute any or all of a display panel, an operation panel, a cover
panel, and a lid panel for making a rechargeable battery removable. In particular, when the panel
10 is a display panel, the piezoelectric element 30 is disposed outside the display area for the
display function. This has the advantage of being less likely to interfere with the display. The
operation panel includes the touch panel of the first embodiment. Further, the operation panel
includes, for example, a sheet key which is a member which is integrally formed on a key top of
operation keys in a foldable type portable telephone and which constitutes one surface of an
operation unit side housing.
[0053]
In the first and second embodiments, the joint member 70 for bonding the panel 10 and the
piezoelectric element 30 and the joint member for bonding the panel 10 and the housing 60
have the same reference numerals. As described. However, as the joining members used in the
first embodiment and the second embodiment, different ones may be used as appropriate
depending on the members to be joined.
[0054]
DESCRIPTION OF SYMBOLS 1 electronic device 10 panel 20 display part 30 piezoelectric
element 32 sound-insulation wall 32a duct 40 input part 42 microphone 42a sound transmission
hole 44 communication part 50 control part 60 housing 70 joining member 80 reinforcement
member 90 support part
14-04-2019
17
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