close

Вход

Забыли?

вход по аккаунту

?

DESCRIPTION JP2013247662

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2013247662
Abstract: The present invention provides an electronic device of a type that vibrates a panel to
generate air-conduction sound and vibration sound, and operates well. The electronic device 1
supports a piezoelectric element 30, a panel 10 that is vibrated by the piezoelectric element 30
to generate an air conduction sound and an oscillating sound that is transmitted by causing a
part of a human body to vibrate, and the panel 10. A housing 60 and a microphone 42 disposed
inside the housing 60 are provided, and the space in the housing 60 in which the microphone 42
is accommodated communicates with the space outside the housing 60 at a plurality of locations.
[Selected figure] Figure 5
Electronics
[0001]
According to the present invention, an electronic is used to vibrate a panel by applying a
predetermined electric signal (sound signal) to a piezoelectric element, and transmit an air
conduction sound and a human body vibration sound to a user by transmitting the vibration of
the panel to the human body. It relates to the equipment.
[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. Further, Patent Document 1 describes that the human body
vibration sound is a sound transmitted to the user's auditory nerve through a part of the user's
body (for example, the cartilage of the outer ear) contacting 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 the air conduction sound and
the human body vibration sound 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 an electronic device in which a panel as a
diaphragm is attached to a housing.
[0006]
An object of the present invention is to provide an electronic device of a type which vibrates a
panel to generate air conduction noise and vibration noise and operates well.
[0007]
An electronic device according to the present invention includes a piezoelectric element, a panel
14-04-2019
2
that vibrates by the piezoelectric element to generate air-conducted sound and vibration sound
transmitted by vibrating a part of a human body, a housing that supports the panel, A
microphone disposed inside the housing, and a space in which the microphone is accommodated
inside the housing is communicated with a space outside the housing at a plurality of locations.
[0008]
According to the present invention, it is possible to provide an electronic device of a type which
vibrates a panel to generate air-conduction sound and vibration sound and operates well.
[0009]
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 sectional drawing along the IV-IV line in FIG. It is sectional drawing along the VV line in FIG.
It is sectional drawing along the VI-VI line in FIG. It is a figure which shows the comparative
example 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.
[0010]
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
14-04-2019
3
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. .
[0011]
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. The panel 10 is disposed relative to the housing 60 so as to
close at least a part of the opening 60 a formed in the housing 60 as described later.
[0012]
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.
[0013]
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
stacked piezoelectric element includes a stacked bimorph element in which bimorphs are stacked
(for example, 16 layers, 24 layers, or 28 layers are stacked). 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.
14-04-2019
4
[0014]
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.
[0015]
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. The input unit 40 includes a
first operation key 40a, a second operation key 40b, and a third operation key 40c.
[0016]
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 if the user presses the panel 10 against his / her body with a
force of, for example, 3N or more (5N to 10N), 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
14-04-2019
5
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
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 can cause the piezoelectric element 30 to apply an electrical signal
corresponding to an audio signal related to the voice of the other party, and generate air
conduction sound and vibration sound corresponding to the audio signal. 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
[0017]
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, panel 10 vibrates
such that a portion where the amplitude of the vibration is relatively large and a portion where
the amplitude of the vibration is relatively small are randomly distributed substantially
throughout the panel 10. That is, vibration of a plurality of waves is detected over 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 abovedescribed 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.
[0018]
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
14-04-2019
6
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. The region having the above 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.
[0019]
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.
[0020]
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.
[0021]
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
14-04-2019
7
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®.
[0022]
First Embodiment FIGS. 3 to 6 are views showing a mounting structure of an electronic device 1
according to a first embodiment. FIG. 3 is a front view. FIG. 4 is a cross-sectional view taken
along the line IV-IV in FIG. FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 6 is a
cross-sectional view taken along the line VI-VI in FIG.
[0023]
The electronic device 1 illustrated in FIGS. 3 to 6 is a smartphone in which a touch panel, which
is a glass plate, is disposed as a panel 10 on the front surface of a housing 60 (for example, a
metal or resin case). The panel 10 and the input unit 40 are supported by a housing 60. The
panel 10 and the input unit 40 each close at least a part of the opening 60 a of the housing 60.
The display unit 20 and the piezoelectric element 30 are each bonded to the panel 10 by a
bonding member 70. 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.
[0024]
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.
[0025]
14-04-2019
8
The housing 60 has a key support 62. The key support portion 62 is extended from the inner
wall of the housing 60. The key support portion 62 supports the first operation key 40a, the
second operation key 40b, and the third operation key 40c. Although not shown in detail in FIG.
3, as shown in FIGS. 5 and 6, the first operation key 40a, the second operation key 40b and the
third operation key 40c are disposed apart from each other. In other words, gaps exist between
the first operation key 40 a and the second operation key 40 b and between the second
operation key 40 b and the third operation key 40 c. The first operation key 40a, the second
operation key 40b, and the third operation key 40c are disposed apart from the housing 60. That
is, there is a gap between the first operation key 40 a, the second operation key 40 b and the
third operation key 40 c and the housing 60.
[0026]
Furthermore, the first operation key 40a, the second operation key 40b, and the third operation
key 40c are disposed apart from the panel 10. That is, there is a gap between the first operation
key 40 a, the second operation key 40 b and the third operation key 40 c and the panel 10. Since
the panel 10 and the first operation key 40a, the second operation key 40b, and the third
operation key 40c are disposed apart from each other, the panel 10 vibrates when the panel 10
vibrates, the panel 10 and the first operation key 40a, the first The 2 operation key 40 b and the
third operation key 40 c are in contact with each other, making it difficult to generate abnormal
noise.
[0027]
A hole 62 a is formed in the key support portion 62. The key support portion 62 has a rib 62 b
that protrudes toward the circuit board 55 around the hole 62 a. As will be described later, the
rib 62 b and the circuit board 55 form a microphone accommodating portion (a space in which
the microphone is accommodated).
[0028]
The microphone 42 is disposed below the housing 60. The microphone 42 is disposed in the
vicinity of the end opposite to the side where the piezoelectric element 30 is disposed in the
longitudinal direction of the housing 60. The microphone 42 a is mounted on a circuit board 55
14-04-2019
9
provided inside the housing 60. The microphone 42 is surrounded by the ribs 62 when the
circuit board 55 is disposed inside the housing 60. That is, the microphone 42 is housed in the
microphone housing portion formed by the rib 62 b and the circuit board 55. The microphone
42 collects the sound emitted outside the housing through the hole 62 a formed in the key
support 62. In other words, the sound emitted outside the housing is input to the microphone 42
through the hole 62 a formed in the key support 62.
[0029]
The waterproof sheet 31 is disposed on the side of the hole 62 a in the microphone housing
portion. The waterproof sheet 31 is a sheet-like member made of, for example, Gore-Tex
(registered trademark). The waterproof sheet 31 does not pass water but allows air to pass. The
waterproof sheet 31 guides the sound to the microphone 42 through the hole 62a, and makes it
difficult for water to infiltrate into the microphone housing portion from the hole 62a.
[0030]
As shown in FIG. 5, the hole 62 a is at a position corresponding to the gap between the first
operation key 40 a and the second operation key 40 b in the thickness direction of the housing
60.
[0031]
A ring rubber 32 is provided around the microphone 42.
The ring rubber 32 is formed of a member having elasticity. The ring rubber 32 is provided
between the waterproof sheet 31 and the microphone 42 so as to surround the outer peripheral
portion of the microphone 42. By arranging the ring rubber 32, it becomes difficult for the sound
generated in a region different from the microphone housing (for example, the space in which
the circuit board 50 is arranged inside the housing 60) to reach the sound input surface of the
microphone 42, The sensitivity of the microphone 42 is improved. The ring rubber 32 has, for
example, a shape (annular shape in plan view) in which a through hole is formed at the central
portion of a cylindrical elastic member, but the shape is not limited to this.
[0032]
14-04-2019
10
The key switches 46a, 46b and 46c are mounted on the circuit board 55 in correspondence with
the first operation key 40a, the second operation key 40b and the third operation key 40c,
respectively. As shown in FIG. 6, a rubber sheet 48, which is an elastic member, is disposed
between the first operation key 40a, the second operation key 40b and the third operation key
40c and the key support portion 62 of the housing 60. The first operation key 40 a, the second
operation key 40 b, and the third operation key 40 c are supported by the key support portion
62 via the rubber sheet 48. The rubber sheet 48 is made of, for example, silicone rubber.
[0033]
The rubber sheet 48 has pushers 48a at positions corresponding to the first operation key 40a,
the second operation key 40b, and the third operation key 40c. The key switches 46a, 46b and
46c are pressed by the pusher 48a when the first operation key 40a, the second operation key
40b and the third operation key 40c are pressed. Then, in accordance with the pressure, a
predetermined electrical signal is transmitted to the control unit 50.
[0034]
The rubber sheet 48 is not provided over the entire key support portion 62, but is provided on
part of the key support portion 62 on the panel 10 side. That is, although the rubber sheet 48 is
provided at the position shown in FIG. 6, ie, the position along the VI-VI line in FIG. 3, provided at
the position shown in FIG. 5, ie, the position along the VV line in FIG. It is not done. The rubber
sheet 48 supports the first operation key 40a, the second operation key 40b and the third
operation key 40c at the position shown in FIG. 6, that is, the position along the line VI-VI in FIG.
That is, the first operation key 40a, the second operation key 40b, and the third operation key
40c are not supported at the position along the line V-V in FIG.
[0035]
In FIG. 5, the first operation key 40a, the second operation key 40b, the third operation key 40c,
and the key support portion 62 are separated. That is, there is a gap between the first operation
key 40 a, the second operation key 40 b and the third operation key 40 c and the key support
portion 62.
14-04-2019
11
[0036]
Thus, according to the electronic device 1 according to the present embodiment, the microphone
housing portion and the hole 62a are separated by the waterproof sheet 31, but as described
above, the waterproof sheet 31 allows air to pass through but water is Because of the impervious
property, air can move between the microphone housing and the hole 62a. The hole 62a is in
communication with the space outside the housing 60 through a plurality of paths. That is, as
shown in FIGS. 4 to 6, the hole 62a is a gap between the key support 62 and each operation key,
a gap between the housing 60 and each operation key, the panel 10 and each operation key The
space between the housing 60 and the space outside the housing 60 is communicated by at least
one of the space between the two and the space between the operation keys.
[0037]
As shown in FIG. 7 as a comparative example, in a structure in which the microphone housing
portion and the space outside the housing communicate with each other through one hole 160
formed in the housing 60, for example, the panel 10 vibrates. When the user closes the hole 160
with a finger or the like, the transmission of sound between the outside of the housing 60 and
the microphone 42 is cut off, and the air conduction sound generated by the vibration of the
panel 10 is the inside of the housing 60. The ratio of the magnitude of the sound transmitted to
the microphone 42 inside the housing 60 with respect to the magnitude of the sound transmitted
to the microphone 42 from the outside of the housing 60 becomes large as a result of the
vibration of the panel 10. The phenomenon that the call voice is collected by the microphone 42
and returned to the other party, the effect of so-called sound return (echo) becomes large, and
the other party is disorganized. There is a possibility to remember.
[0038]
On the other hand, the electronic device 1 according to the present embodiment has a plurality
of paths connecting the hole 62 a and the external space of the housing 60.
In other words, the microphone housing portion is in communication with the space outside the
housing 60 at a plurality of locations. Therefore, for example, when the user operates the first
operation key 40a, the gap between the housing 60 and the first operation key 40a with the
user's finger or the gap between the panel 10 and the first operation key 40a is closed. Even in
14-04-2019
12
this case, the hole 62a is communicated with the space outside the housing 60 by, for example,
the gap between the third operation key 40c and the housing 60 (the space between the hole
62a and the outside space of the housing 60) Not all routes are blocked). Therefore, the
transmission of sound between the outside of the housing 60 and the microphone 42 is difficult
to be interrupted, and the ratio of the size of the sound transmitted to the microphone 42 inside
the housing 60 to the size of the sound transmitted to the microphone 42 from the outside of the
housing 60 Can be made sufficiently smaller than the above comparative example. That is, the
sound transmitted to the microphone 42 inside the housing 60 can be masked by the sound
transmitted to the microphone 42 from the outside of the housing 60, and the influence of echo
can be reduced.
[0039]
Further, as shown in FIG. 5, the hole 62 a is located at a position corresponding to the gap
between the first operation key 40 a and the second operation key 40 b in the thickness
direction of the housing 60. With this configuration, the sound entering the gap between the first
operation key 40a and the second operation key 40b from the outside of the housing 60 directly
reaches the microphone 42 through the hole 62a. Therefore, the weekly sound of the
microphone 42 is improved.
[0040]
Although the electronic device 1 according to the first embodiment has been described above
with reference to FIGS. 3 to 6, the present invention is not limited to the above embodiment, and
all the creators of ordinary skill in the relevant technical field can create It includes modifications
and alternative configurations.
[0041]
For example, in the electronic device 1 according to the first embodiment, the plurality of paths
connecting the hole 62a and the external space of the housing 60 are the gaps between the key
support 62 and the respective operation keys, the housing 60 and the respective operation keys
And a gap between the panel 10 and each operation key, and a gap between each operation key,
but not limited thereto.
For example, the microphone 42 is a light guide member provided to be exposed from the
14-04-2019
13
opening 60 of the housing 60 and guiding light emitted from a light emitting member (not
shown) such as an LED disposed inside the housing 60 to the outside of the housing 60. A
plurality of the light guide members may be provided in the vicinity, and the space between the
hole 62 a and the space outside the case 60 may be communicated by the gap between each of
the plurality of light guide members and the case 60.
[0042]
FIG. 8 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 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.
[0043]
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
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.
[0044]
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
14-04-2019
14
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.
[0045]
Second Embodiment FIG. 9 is a view showing a mounting structure of an electronic device 1
according to a second embodiment. 9 (a) is a front view, FIG. 9 (b) is a cross-sectional view taken
along the line b-b in FIG. 9 (a), and FIG. 9 (c) is taken along the line c-c in FIG. 9 (a) FIG. The
electronic device 1 shown in FIG. 9 is a foldable mobile phone in which a cover panel (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.
[0046]
FIG. 10 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.
14-04-2019
15
[0047]
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
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.
[0048]
Also in the electronic device 1 according to the second embodiment described above, the same
configuration as that of the first embodiment (FIGS. 3 to 6) can be employed. In a foldable mobile
phone such as the electronic device 1 according to the second embodiment, a microphone may
be disposed in the lower housing. Since it is conceivable that the vibration of the panel 10 is
transmitted from the upper case to the lower case via the connection portion, the echo similar to
that of the first embodiment (FIG. 3 to FIG. 6) can be obtained. Can reduce the effects of
[0049]
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
14-04-2019
16
of the reinforcing member 80, a plate-like weight may be attached to the piezoelectric element
30 by the joining member 70.
[0050]
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.
[0051]
For example, as shown in FIG. 11, 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
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.
[0052]
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.
14-04-2019
17
[0053]
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
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.
[0054]
Also, the piezoelectric element 30 may be configured to vibrate the corner portions (for example,
at least one of four corners) of the housing 60. In this case, the piezoelectric element 7 may be
attached to the inner surface of the corner of the housing 60 or may further include an
intermediate member, and the vibration of the piezoelectric element 30 is transmitted to the
corner of the housing 60 via the intermediate member May be.
[0055]
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.
[0056]
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
14-04-2019
18
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.
[0057]
DESCRIPTION OF SYMBOLS 1 electronic device 10 panel 20 display part 30 piezoelectric
element 31 waterproof sheet 32 ring rubber 40 input part 40a 1st operation key 40b 2nd
operation key 40c 3rd operation key 42 microphone 46 key switch 48 rubber sheet 50 control
part 55 circuit board 60 Housing 60a Opening 62 Key support 62a Hole 62b Rib 70 Joint
member 80 Reinforcement member 90 Support 160 hole
14-04-2019
19
Документ
Категория
Без категории
Просмотров
0
Размер файла
33 Кб
Теги
jp2013247662, description
1/--страниц
Пожаловаться на содержимое документа