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DESCRIPTION JP2014027568

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DESCRIPTION JP2014027568
Abstract: The present invention provides an electronic device capable of selectively using a state
of generating vibration sound that is transmitted through a part of a human body and a state of
not generating the vibration sound. An electronic device (1) has a vibrating element (30) that
deforms when a voltage is applied, and a first state or a vibrating element that does not generate
a vibration sound transmitted through a part of a human body even if the vibrating element is
deformed. And a vibration unit 90 capable of taking a second state in which a vibration sound
transmitted through a part of the human body is generated by the deformation of 30. [Selected
figure] Figure 4
Electronics
[0001]
The present invention is an electronic device that vibrates a panel by applying a predetermined
electrical signal (audio signal) to a vibrating 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.
Further, in Patent Document 1, air conduction sound is a sound transmitted to the eardrum by
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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-like
vibrator made of a piezoelectric bimorph and a flexible material is attached to the outer surface
of a housing through an elastic member. Further, 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 bone conduction 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 main body (housing) of a mobile phone or the like.
However, in conventional electronic devices such as mobile phones, no consideration has been
given to using properly the state of generating the vibration sound transmitted through a part of
the human body as described above and the state of not generating such vibration sound. It was
not.
[0006]
An object of the present invention is to provide an electronic device capable of selectively using
the state of generating an oscillating sound that is transmitted through a part of a human body
and the state of not generating the oscillating sound.
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[0007]
The electronic device according to the present invention comprises: a vibrating element that
deforms when a voltage is applied; a first state in which vibration noise is not generated that is
transmitted through a part of the human body even if the vibrating element is deformed; And a
vibration unit capable of taking a second state in which the vibration sound is generated.
[0008]
You may further provide the housing by which the said vibration element is mounted.
[0009]
The vibrating portion may vibrate in contact with the vibrating element in the second state.
[0010]
The vibrating portion has a contact portion that contacts the vibrating element in the second
state, and the contact portion is in contact with the vibrating element in a state of being
elastically deformed along the main surface of the vibrating element. It is also good.
[0011]
The vibration unit further includes a vibration urging unit that contacts the vibration element by
being pressed in a predetermined direction, and generates the vibration sound in a direction
opposite to the predetermined direction in the second state. It is also good.
[0012]
The vibrating portion may not be in contact with the vibrating element in the first state.
[0013]
Air conduction sound may be generated from the housing by the deformation of the vibrating
element.
[0014]
According to the electronic device of the present invention, it is possible to properly use the state
of generating the vibration sound transmitted through a part of the human body and the state of
not generating the vibration sound.
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[0015]
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 explaining the panel of the electronic device which concerns on one Embodiment of
this invention.
It is a figure which shows the mounting structure of the electronic device which concerns on one
Embodiment of this invention.
It is an important section sectional view of the electronic equipment concerning one embodiment
of the present invention.
It is a figure explaining the effect of the electronic device concerning one embodiment of the
present invention.
It is an important section sectional view of the electronic equipment concerning one embodiment
of the present invention.
It is principal part sectional drawing of the modification of the electronic device which concerns
on one Embodiment of this invention.
[0016]
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.
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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 as a vibrating element, an input unit 40, and a control
unit 50.
[0017]
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, it 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 resistive 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.
[0018]
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.
[0019]
The piezoelectric element 30 is an element that stretches or bends, that is, deforms 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
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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. The unimorph stretches when an electrical signal (voltage) is applied, and the bimorph
bends when an electrical signal (voltage) is applied.
[0020]
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. The
piezoelectric element 30 may 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.
[0021]
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.
[0022]
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
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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 curves 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
[0023]
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 over
substantially the entire 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 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.
[0024]
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
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(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. 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.
[0025]
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.
[0026]
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.
[0027]
The electronic device 1 described above transmits a sound to the user by the vibration of the
panel 10.
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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®.
[0028]
FIG. 3 is a view showing the mounting structure of the electronic device 1 according to the
embodiment of the present invention. FIG. 3 (A) is a front view, and FIG. 3 (B) is a cross-sectional
view taken along the line B-B in FIG. 3 (A). The electronic device 1 illustrated in FIG. 3 is a
smartphone in which a touch panel, which is a glass plate, is disposed on the front surface of a
housing 60 (for example, a metal or resin case) as the panel 10. The panel 10 and the input unit
40 are supported by the housing 60 or the substrate 55 or the like, and the display unit 20 and
the piezoelectric element 30 are bonded to the panel 10 by a bonding member 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.
[0029]
The display unit 20 is disposed substantially at the center of the panel 10 in the lateral direction.
In addition to being bonded to the panel 10 by the bonding member 70, the display unit 20 may
be fixed by being supported by, for example, the housing 60 or the substrate 55. 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.
[0030]
As shown in FIG. 3B, the substrate 55 may be, for example, the battery 65 or the like, or may be
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various elements such as the control unit 50 described above. Furthermore, in the present
embodiment, the substrate 55 may be configured to support (hold) various members instead of
the housing 60.
[0031]
Furthermore, as shown in FIG. 3B, the electronic device 1 according to the present embodiment
includes a vibrating unit 90. The vibration unit 90 includes a vibration urging unit 100, a flange
110, a shaft 120, and an abutment 130. As shown in FIG. 3B, when the substrate 55 exists at the
position of the shaft 120 of the vibrating unit 90, the shaft 120 penetrates the substrate 55 by
forming an opening (hole) in the substrate 55. Let's do it. The vibration unit 90 will be further
described later.
[0032]
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. As shown in FIG. 2, according to the electronic device 1, the user
hears the air conduction sound and the vibration sound transmitted through the panel 10 by
bringing the ear into contact with an arbitrary position of the panel 10. be able to.
[0033]
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.
[0034]
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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.
[0035]
FIG. 4 is an enlarged cross-sectional view of the main part of the electronic device 1 shown in
FIG.
[0036]
As shown in FIG. 4, the electronic device 1 includes a vibrating portion 90, and as described
above, the vibrating portion 90 includes the vibration urging portion 100, the flange portion
110, the shaft 120, and the contact portion 130. And including.
In the present specification, for convenience of explanation, the state shown in FIG. 4A is
described as a first state of the vibrating portion 90, and the state shown in FIG. 4B is described
as a second state of the vibrating portion 90. In FIG. 4, the substrate 55 shown in FIG. 3B is
omitted for simplification of the drawing.
[0037]
The vibration urging unit 100 is a portion pressed by the user's finger or the like, and generates
vibration sound transmitted through a part of the human body in the second state. For this
reason, it is desirable that the vibration biasing unit 100 be a member having a certain degree of
hardness suitable for vibration transmission, such as metal, plastic, or resin.
[0038]
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As shown in FIG. 4, on the inner side of the housing 60, a flange 110 is formed at the end of the
vibration urging unit 100. The flange 110 limits the portion of the vibration biasing unit 100 that
protrudes to the outside of the housing 60 to a predetermined thickness, and makes it difficult
for the vibrating unit 90 to be removed from the housing 60. The flange portion 110 may be
integrally formed with the vibration biasing portion 100 or may be bonded as a member separate
from the vibration biasing portion 100, but the vibrating portion 90 may be attached to the
housing 60. From the viewpoint of preventing coming off, it is desirable to use a member having
a certain degree of hardness.
[0039]
The shape of the vibration urging unit 100 can be rectangular as shown in FIG. 5A when the
electronic device 1 is viewed in plan from the back side (the surface opposite to the surface
provided with the panel 10). . However, the vibration urging unit 100 is not limited to the
rectangular shape, and may have various shapes such as a circular shape or an elliptical shape.
Since the vibration urging unit 100 is a portion pressed by the user's finger or the like, it is
desirable that the vibration urging unit 100 be shaped so as to be easily pressed by the user.
Moreover, the shape of the collar part 110 is not limited to the shape shown in FIG. 4, It can be
set as the arbitrary shapes which can prevent that the vibration part 90 remove | deviates from
the housing | casing 60. FIG.
[0040]
The shaft 120 extends from the vibration biasing portion 100 or the collar portion 110, and a
contact portion 130 is formed at the tip end thereof. Since the shaft 120 is a member for
transmitting the vibration with respect to the contact portion 130 to the vibration biasing portion
100, the shaft 120 is a member having a certain degree of hardness suitable for transmitting the
vibration, such as metal, plastic or resin. Is desirable. The shaft 120 can be typically a rod-like
member, but may be a plate-like member in accordance with the shape of the vibration biasing
unit 100, for example.
[0041]
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The contact portion 130 formed at the tip of the shaft 120 contacts the piezoelectric element 30
in the second state as shown in FIG. 4 (B). As described later, it is desirable that the contact
portion 130 be a member having elasticity such as silicon rubber that is deformed to some extent
by the pressure of the user in order to make the area in contact with the piezoelectric element 30
variable. This contact portion 130 can be typically a spherical member, but it may be, for
example, a cylindrically shaped member according to the shape of the shaft 120 (for example,
when the shaft 120 has a plate shape) It is also good.
[0042]
Although not shown in FIG. 3B, the vibrating portion 90 includes the plate spring 140 as shown
in FIG. 4 so that the external force is not applied to the vibrating portion 90 shown in FIG. 4A. 1
Make the state restored. That is, a certain amount of force acts on the vibrating portion 90 in the
direction from left to right in FIG. 4 by the plate spring 140. When the user presses the vibrating
portion 90 in a predetermined direction such as the direction of the arrow shown in FIG. 4B, the
entire vibrating portion 90 is directed toward the inside of the housing 60 as shown in FIG. 4B.
The contact portion 130 is pressed into contact with the piezoelectric element 30 (second state).
In the second state, since the leaf spring 140 is extended, when the user depresses the force to
press the vibrating portion 90, as shown in FIG. It will not come in contact (first state).
[0043]
The leaf spring 140 can be any type as long as it exerts a force that restores the vibrating portion
90 to the first state. Therefore, the plate spring 140 is not essential to be a plate-like spring, and
can be various elastic members such as a spring or urethane which restores the vibrating portion
90 to the first state.
[0044]
Thus, as shown in FIG. 4, the vibration unit 90 included in the electronic device 1 according to
the present embodiment can be in the first state or the second state. Here, in the first state, the
vibrating portion 90 does not abut on the piezoelectric element 30. In the first state, as shown in
FIG. 4A, since the contact portion 130 of the vibration unit 90 does not contact the piezoelectric
element 30, even if the piezoelectric element 30 is deformed, the vibration unit 90 does not
Vibration noise transmitted through part does not occur.
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[0045]
On the other hand, in the second state, the vibrating portion 90 abuts on the piezoelectric
element 30 to vibrate. In the second state, as shown in FIG. 4B, the contact portion 130 of the
vibrating portion 90 is in contact with the piezoelectric element 30, and therefore, a part of the
human body from the vibrating portion 90 is deformed by the deformation of the piezoelectric
element 30. Vibration noise is generated through the Here, in the second state, the vibration
urging unit 100 of the vibration unit 90 generates vibration sound transmitted through a part of
the human body in the direction opposite to the direction in which the vibration unit 90 is
pressed by the user. . As will be described later, it is desirable that the contact portion 130 be in
contact with the piezoelectric element 30 in a state of being elastically deformed along the main
surface of the piezoelectric element 30, as shown in FIG. 6 (B). As a result, the area in which the
contact portion 130 abuts on the piezoelectric element 30 can be gained, so that the vibration of
the piezoelectric element 30 can be well transmitted to the vibrating portion 90, and
consequently the vibration noise transmitted through a part of the human body Can be generated
efficiently.
[0046]
As described above, according to the electronic device 1 according to the present embodiment, it
is possible to selectively use the state of generating the vibration sound transmitted through a
part of the human body and the state of not generating the vibration sound.
[0047]
Next, with reference to FIG. 5, a usage mode of the electronic device 1 according to the present
embodiment will be described.
[0048]
As described above, in the first state where the user does not press the vibrating portion 90, the
vibration noise is generated from the panel 10 by the deformation of the piezoelectric element
30, but the electronic device 1 generates the vibrating noise from the vibrating portion 90. There
is no vibration noise.
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On the other hand, in the second state in which the user presses the vibration unit 90, vibration
noise is generated from the vibration unit 90 when the piezoelectric element 30 is deformed.
For this reason, in the second state in which the vibration unit 90 is pressed, the user brings a
part of the human body into contact with the vibration urging unit 100, thereby causing the
vibration urging unit 100 to intervene from the human body. Vibration noise can be transmitted.
Therefore, in the second state, as shown in FIG. 5A, the vibration urging unit 100 disposed on the
surface opposite to the surface provided with the panel 10 of the electronic device 1 is used to
Vibration noise transmitted through a part can be generated.
[0049]
For example, when holding the electronic device 1 in the state shown in FIG. 5A with one hand,
the user places the belly of the forefinger at the position of the vibration urging unit 100 as
shown in FIG. 5B. Thus, the vibrating portion 90 can be pressed to be in the second state. In the
example shown in FIG. 5B, the vibration urging unit 100 can transmit the vibration sound
through the user's index finger. Therefore, for example, when the user applies the tip of the
forefinger to the tragus, the vibration noise generated from the vibration urging unit 100 is
transmitted through a part of the user's human body. In this case, even if the user closes the
tragus by closing the end of the forefinger, vibration noise can be transmitted. Therefore, for
example, when the surrounding environment is noisy, the user can easily hear the sound by
inserting the tip of the forefinger into the ear canal while grasping the electronic device 1 as
shown in FIG. 5B. It can also be done.
[0050]
In the second state, the electronic device 1 can be used like a loudspeaker by bringing the
vibration urging unit 100 into contact with a hard plate-like member such as the surface of a
desk. Furthermore, in the second state, even if the vibration urging unit 100 (not the panel 10) is
brought into contact with the user's ear, the vibration noise generated from the vibration urging
unit 100 is a part of the user's human body. Can be communicated through. In this way, it is not
necessary to bring the panel 10 into contact with the user's ear, so that the panel 10 is not soiled
by sebum such as the user's face, and the display displayed on the panel 10 by the soiling The
display of the section 20 does not become difficult to see.
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[0051]
Furthermore, the electronic device 1 according to the present embodiment can adjust the volume
of the vibration sound generated from the vibration urging unit 100 in the second state. As
shown in FIG. 6A, for example, when the user presses the vibrating portion 90 with a weak force,
the force with which the abutting portion 130 abuts against the piezoelectric element 30 is
relatively weak. Almost no elastic deformation. As described above, when the elastic deformation
of the contact portion 130 is small, the area of the portion where the contact portion 130
contacts the piezoelectric element 30 is small, so the vibration transmitted from the piezoelectric
element 30 to the vibrating portion 90 is also weak. The volume of the vibration noise generated
from the unit 100 is reduced. On the other hand, as shown in FIG. 6B, for example, when the user
presses the vibrating portion 90 with a strong force, the force with which the abutting portion
130 abuts on the piezoelectric element 30 is relatively strong. 130 undergoes large elastic
deformation. As described above, when the elastic deformation of the contact portion 130 is
large, the area of the portion where the contact portion 130 abuts on the piezoelectric element
30 is large, so that the vibration transmitted from the piezoelectric element 30 to the vibrating
portion 90 is also strong. The volume of the vibration noise generated from the biasing unit 100
can be increased.
[0052]
In the case where the electronic device 1 is provided with a waterproof or dustproof mechanism,
there is a possibility that moisture or dust may intrude from the portion where the vibrating
portion 90 moves, that is, the gap between the vibration urging portion 100 and the housing 60.
. Therefore, in such a case, as shown in FIG. 7, for example, a waterproof key rubber 160 covers
the gap between the vibration urging unit 100 and the housing 60, and the key rubber 160 is It
is desirable to be glued to the body 60. Here, the key rubber 160 may be formed of silicon
rubber or the like, and the bonding unit 150 may be a waterproof double-sided tape or a
waterproof bond. Thereby, in the electronic device 1, it is possible to suppress moisture, dust,
and the like which infiltrate from the gap between the vibration urging unit 100 and the housing
60.
[0053]
In the above description, the housing 60 of the electronic device 1 has been described as a
separate member from the panel 10. However, in the present embodiment, the housing 60 is not
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limited to the so-called case made of resin or the like, and may also include the panel 10 formed
of, for example, glass or synthetic resin. Therefore, the electronic device 1 according to the
present embodiment may further include the housing 60 on which the piezoelectric element 30
is mounted, and the air conduction sound may be generated from the housing 60.
[0054]
As described above, in the present embodiment, the piezoelectric element 30 may be mounted on
the housing 60 (or the panel 10). In the first state, the electronic device 1 according to the
present embodiment does not generate vibration noise from the vibrating portion 90 even if the
piezoelectric element 30 is deformed, and in the second state, the piezoelectric element 30 is
deformed by the deformation Although the configuration is such as to generate vibration noise,
the present invention is not limited to such an embodiment. For example, with the configuration
in which the piezoelectric element 30 is mounted on the vibrating portion 90, the vibration is
vibrated by the third state in which the vibration is not transmitted to the housing 60 even if the
piezoelectric element 30 vibrates, and the vibration of the piezoelectric element 30. The fourth
state transmitted from the portion 90 to the housing 60 may be taken. In this case, even if the
piezoelectric element 30 is deformed in the third state, vibration noise is not generated from the
housing 60, and in the fourth state, vibration sound is generated from the housing 60 due to the
deformation of the piezoelectric element 30.
[0055]
In the present invention, "does not generate" air conduction noise or vibration noise does not
only mean that it does not occur physically strictly, but it is a level that can hardly be heard by
humans in actual use (for example, volume) Is less than 20 dB or less than 30 dB).
[0056]
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
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divide a plurality of components or steps into one. is there.
[0057]
For example, the panel 10 may be joined to the housing 60 by a joining member. 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. In addition, the bonding member can be 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. Also, the bonding member 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.
[0058]
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.
[0059]
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, as
described above, 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.
[0060]
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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.
[0061]
Moreover, in said electronic device 1, although the piezoelectric element is mentioned as an
example of a vibrating element, it is not limited to this. The vibrating element may be different
from the piezoelectric element as long as the panel 10 can be vibrated. The vibrating element
may be, for example, an electromagnetic vibrating element equipped with a coil and a magnet,
which is mounted on a conventional dynamic speaker. The vibrating element may be, for
example, an eccentric motor.
[0062]
DESCRIPTION OF SYMBOLS 1 electronic device 10 panel 20 display part 30 piezoelectric
element 40 input part 50 control part 55 board | substrate 60 housing 65 battery 70 joining
member 90 vibration part 100 vibration urging part 110 flange part 120 shaft 130 contact part
140 leaf spring 150 bonding part 160 key rubber
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