WO2014192301A1 - ユニット、電子機器及び電子機器の製造方法 - Google Patents
ユニット、電子機器及び電子機器の製造方法 Download PDFInfo
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- WO2014192301A1 WO2014192301A1 PCT/JP2014/002852 JP2014002852W WO2014192301A1 WO 2014192301 A1 WO2014192301 A1 WO 2014192301A1 JP 2014002852 W JP2014002852 W JP 2014002852W WO 2014192301 A1 WO2014192301 A1 WO 2014192301A1
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- Prior art keywords
- piezoelectric element
- panel
- attached
- electronic device
- plate
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Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/0249—Details of the mechanical connection between the housing parts or relating to the method of assembly
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/06—Arranging circuit leads; Relieving strain on circuit leads
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/006—Interconnection of transducer parts
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
- H04R7/045—Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2440/00—Bending wave transducers covered by H04R, not provided for in its groups
- H04R2440/01—Acoustic transducers using travelling bending waves to generate or detect sound
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2440/00—Bending wave transducers covered by H04R, not provided for in its groups
- H04R2440/05—Aspects relating to the positioning and way or means of mounting of exciters to resonant bending wave panels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
- H04R2460/13—Hearing devices using bone conduction transducers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
Definitions
- This invention vibrates a member (panel) to which the piezoelectric element is attached by applying a predetermined electrical signal (audio signal) to the piezoelectric element, and transmits the vibration of the member to the human body, thereby partially It is related with the electronic device which conveys the vibration sound transmitted through to a user.
- a predetermined electrical signal audio signal
- Patent Document 1 describes an electronic device such as a mobile phone that conveys air conduction sound and bone conduction sound to a user.
- air conduction sound is sound transmitted to the auditory nerve of a user by vibration of air that is caused by vibration of an object being transmitted to the eardrum through the external auditory canal.
- the vibration sound is a sound transmitted to the user's auditory nerve through a part of the user's body (for example, cartilage of the outer ear) that contacts the vibrating object. Yes.
- Patent Document 1 In the telephone set described in Patent Document 1, it is described that a short plate-like vibrating body made of a piezoelectric bimorph and a flexible material is attached to the outer surface of a housing via an elastic member. Further, in Patent Document 1, when a voltage is applied to the piezoelectric bimorph of the vibrating body, the vibrating body bends and vibrates as the piezoelectric material expands and contracts in the longitudinal direction, and the user contacts the vibrating body with the auricle. And air conduction sound and vibration sound are transmitted to the user.
- Patent Document 2 discloses an electronic device such as a mobile phone terminal that transmits a human body vibration sound to an object in contact with a panel by vibrating the panel due to deformation of a piezoelectric element attached to the panel. Are listed.
- JP 2005-348193 A Japanese Patent No. 5255142
- An object of the present invention is to provide a unit, an electronic device, and a method for manufacturing the electronic device that are less likely to cause excessive deformation of the piezoelectric element and can reduce damage to the piezoelectric element due to external force.
- a unit according to the present invention includes a panel, a piezoelectric element attached to the panel, and a substrate attached to a main surface of the piezoelectric element, and a contact portion of a human body that is in contact with the panel deformed by the piezoelectric element is provided.
- a unit that vibrates and transmits sound wherein the substrate has a base material made of resin, and a signal line that is laminated on the base material and connected to the main surface of the piezoelectric element, and the piezoelectric element The main surface is substantially entirely covered with the base material.
- the electronic apparatus includes at least such a unit.
- the electronic device includes a housing, a panel attached to the housing, and a piezoelectric element attached to the panel, and the panel is deformed due to deformation of the piezoelectric element,
- the electronic device transmits a human body vibration sound to an object in contact with the panel, and further includes a protective member attached to a surface of the piezoelectric element opposite to the surface attached to the panel, the protective member
- the surface of the protective member opposite to the surface attached to the piezoelectric element is a convex curved shape.
- the protective member may cover a surface of the piezoelectric element on which the protective member is attached and a side surface extending from the surface.
- An electronic apparatus includes a housing, a piezoelectric element, a panel attached to the housing, and an intermediate member disposed between the panel and the piezoelectric element. Due to the deformation of the electronic device, the panel is deformed to transmit a human body vibration sound to an object in contact with the panel, wherein the piezoelectric element is attached to the intermediate member,
- the protective member further includes a protective member attached to a surface opposite to the surface attached to the intermediate member, and the protective member has a curved shape with a convex surface opposite to the surface attached to the piezoelectric element in the protective member. It is characterized by being.
- the protective member may cover a surface of the piezoelectric element on which the protective member is attached and a side surface extending from the surface.
- the area of the surface of the intermediate member to which the piezoelectric element is attached may be larger than the area of the surface of the piezoelectric element attached to the intermediate member.
- the intermediate member may be attached to the panel and the piezoelectric element by a joining member, and a groove may be formed on a surface of the intermediate member on which the panel or the piezoelectric element is attached.
- the electronic device includes a housing, a panel attached to the housing, and a piezoelectric element attached to the panel, and the panel is deformed due to deformation of the piezoelectric element,
- An electronic device that transmits a human body vibration sound to an object in contact with the panel further comprising a lid member composed of a wall surface surrounding the piezoelectric element and an upper surface extending from the wall surface, The lid member is attached to the panel, and the piezoelectric element is disposed in a space formed by the panel and the lid member.
- the space may be filled with a curable resin.
- the manufacturing method according to the present invention includes a housing, a panel attached to the housing, a piezoelectric element attached to the panel, and a frame member surrounding the piezoelectric element, and the deformation of the piezoelectric element. Due to the above, the panel is deformed and a method of manufacturing an electronic device that transmits a human body vibration sound to an object in contact with the panel, wherein the frame member is attached to the panel, and the panel and the frame member A surface of the piezoelectric element opposite to the surface attached to the panel is covered with the resin by pouring and curing a curable resin into a substantially box-shaped mold comprising a wall surface. It is.
- a manufacturing method includes a frame, a panel attached to the housing, a wall surface that surrounds the piezoelectric element, and a frame member that includes a bottom surface extending from the wall surface;
- a piezoelectric element attached to the frame member, and the panel is deformed due to the deformation of the piezoelectric element, and the electronic device manufacturing method transmits a human body vibration sound to an object in contact with the panel.
- the surface of the piezoelectric element opposite to the surface attached to the frame member by pouring and curing a curable resin into a substantially box-shaped mold composed of the wall surface portion and the bottom surface portion of the frame member Is coated with the resin.
- an edge region of the bottom surface portion is attached to the panel by a first joining member, and a through hole is formed in at least a part of the bottom surface portion, and the curable resin is connected to the panel through the through hole.
- the space between the bottom portion may be filled.
- the unit according to the present invention includes a piezoelectric element and a protective member attached to a predetermined surface of the piezoelectric element, and a surface other than the predetermined surface of the piezoelectric element is attached to a predetermined plate-like member.
- the surface opposite to the surface to be attached to the piezoelectric element is a convex curved shape.
- the unit according to the present invention includes a first plate-like member and a piezoelectric element attached to the first plate-like member, and the surface of the first plate-like member on which the piezoelectric element is attached is When the opposite surface is attached to a second plate-like member different from the first plate-like member, the second plate-like member is deformed due to the deformation of the piezoelectric element, and the second plate-like member is deformed.
- a unit for transmitting human body vibration sound to an object in contact with a member further comprising a protection member attached to a surface of the piezoelectric element opposite to the surface attached to the first plate-like member,
- the member is characterized in that the surface of the protective member opposite to the surface attached to the piezoelectric element has a convex curved shape.
- a unit according to the present invention includes a box-shaped member and a piezoelectric element attached to a bottom surface portion on the inner side of the box-shaped member, and a surface of the bottom portion of the box-shaped member on which the piezoelectric element is attached.
- the surface on the opposite side is attached to a predetermined plate-like member, the plate-like member is deformed due to the deformation of the piezoelectric element, and the human body vibration sound is applied to the object in contact with the plate-like member.
- the transmission unit is characterized in that the resin covers at least a part of the piezoelectric element by pouring and curing a curable resin into the box-shaped member.
- the electronic device includes a panel, a piezoelectric element, a casing to which the panel is attached, an intermediate part that is attached to the panel and the piezoelectric element, and is disposed between the piezoelectric element and the panel.
- An electronic device that transmits a human body vibration sound to an object that contacts the panel due to deformation of the piezoelectric element, wherein the intermediate member includes the panel and the member In a predetermined region including at least a region immediately below the piezoelectric element in the stacking direction of the intermediate member and the piezoelectric element, the first bonding member is attached to the panel, and in at least a part of the region around the predetermined region, The panel is attached to the panel by a second joining member that is softer than the first joining member.
- the intermediate member may be attached to one end side of the panel, and the second joining member may be disposed on the opposite side of the panel from one end in a region where the intermediate member and the panel are attached.
- the first joining member may be a curable resin.
- the second joining member may be a double-sided tape.
- the piezoelectric element further includes a protective member attached to a surface opposite to the surface attached to the intermediate member, and the protective member is opposite to the surface attached to the piezoelectric element in the protective member.
- the surface may be a convex curved shape.
- the protective member may cover a surface of the piezoelectric element on which the protective member is attached and a side surface extending from the surface.
- a groove may be formed on a surface of the intermediate member on which the panel or the piezoelectric element is attached.
- the manufacturing method according to the present invention includes a panel, a piezoelectric element, a casing to which the panel is attached, an intermediate part that is attached to the panel and the piezoelectric element, and is disposed between the piezoelectric element and the panel.
- An electronic member that transmits a human body vibration sound to an object that contacts the panel due to deformation of the piezoelectric element, the member including a member and a joining member for attaching the intermediate member to the panel A device manufacturing method, wherein a space is formed between the panel, the intermediate member, and the joining member, and a first hole communicating from the space to the outside of the space is formed in the space, A curable resin is filled into the space from the first hole.
- the space is formed with a second hole different from the first hole, which communicates from the space to the outside of the space, and is filled with an adhesive from the first hole to the space.
- the existing gas may be exhausted out of the space through the second hole.
- the piezoelectric element has a rectangular shape, and the joining member is attached to both edges along a longitudinal direction on a predetermined surface of the piezoelectric element, and the space has a substantially rectangular shape,
- the first hole may be formed at one end in the longitudinal direction of the space, and the second hole may be formed at the other end opposite to the one end in the longitudinal direction of the space.
- the intermediate member has a bottom surface portion to which the piezoelectric element is attached and a wall surface portion standing from the bottom surface portion, and is curable in a box-shaped internal space composed of the bottom surface portion and the wall surface portion.
- the surface of the piezoelectric element opposite to the surface attached to the intermediate member may be covered with the resin by pouring and curing the resin.
- the unit according to the present invention includes a first plate-like member and a piezoelectric element attached to the first plate-like member, and the surface of the first plate-like member on which the piezoelectric element is attached is When the opposite surface is attached to a second plate-like member different from the first plate-like member, the second plate-like member is deformed due to the deformation of the piezoelectric element, and the second plate-like member is deformed.
- a unit for transmitting a human body vibration sound to an object in contact with a member wherein the piezoelectric element is a predetermined area including at least an area immediately below the piezoelectric element in a stacking direction of the piezoelectric element and the first plate-like member
- the first plate-shaped member is attached to the first plate-shaped member by the first bonding member in the second bonding member that is softer than the first bonding member in at least a part of the area around the predetermined region.
- a unit according to the present invention includes a box-shaped member and a piezoelectric element attached to a bottom surface portion on the inner side of the box-shaped member, and a surface of the bottom portion of the box-shaped member on which the piezoelectric element is attached.
- the piezoelectric element is formed in a box-like shape by a first bonding member in a predetermined region including at least a region immediately below the piezoelectric element in the stacking direction of the piezoelectric element and the bottom surface portion of the box-shaped member. It is attached to a member, and is attached to the box-shaped member by a second joining member that is softer than the first joining member in at least a part of the area around the predetermined region. .
- the piezoelectric element may further include a protective member attached to the surface opposite to the surface attached to the panel.
- the protective member may have a curved shape in which a surface of the protective member opposite to a surface attached to the piezoelectric element is convex.
- the present invention it is possible to provide a unit, an electronic device, and a method for manufacturing an electronic device that are unlikely to cause excessive deformation of the piezoelectric element and can reduce damage to the piezoelectric element due to external force.
- 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 (an example of an attachment member), a display unit 20, a piezoelectric element 30, an input unit 40, and a control unit 50.
- the panel 10 is a touch panel that detects contact or a cover panel that protects the display unit 20.
- the panel 10 is made of, for example, glass, a synthetic resin such as acrylic, sapphire, or the like.
- sapphire is made of aluminum oxide (Al 2 O 3 ) crystals and manufactured industrially.
- the panel 10 may have a flat plate shape or may have a curved surface shape.
- As a panel having a curved surface shape for example, the surface constituting the outer side of the electronic device 1 has a concave shape with a recessed central portion, while the surface constituting the inner side of the electronic device 1 is a plane. Is also included.
- the concave surface of the panel 10 is easy to fit in the temporal region of the user, and the usability is improved. Since the surface on the inner side of the electronic device 1 is a flat surface, for example, even the flat display portion 20 having poor flexibility can be easily attached. Moreover, the shape of the panel 10 is good in a plate shape.
- the panel 10 may be a flat plate or a curved panel whose surface is smoothly inclined. When the panel 10 is a touch panel, the touch of a user's finger, pen, stylus pen, or the like is detected.
- 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 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 may be a flexible display having flexibility.
- the display unit 20 is provided on the back surface of the panel 10.
- the display unit 20 is disposed on the back surface 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 supported by the housing of the electronic device 1.
- display part 20 may be joined to the back of panel 10 with a joining member (for example, adhesives).
- the joining member is, for example, an elastic resin such as an optical elastic resin in which the refractive index of light to be transmitted is controlled.
- the display unit 20 displays various information through the bonding member and the panel 10.
- the piezoelectric element 30 is an element that expands or contracts (bends) according to the electromechanical coupling coefficient of the constituent material by applying an electric signal (voltage).
- the piezoelectric element 30 may be a unimorph, bimorph, or multilayer piezoelectric element.
- the stacked piezoelectric element includes a stacked unimorph element in which unimorphs are stacked (for example, 16 layers or 24 layers), or a stacked bimorph element in which bimorphs are stacked (for example, 16 layers or 24 layers are stacked).
- the laminated piezoelectric element is composed of a laminated structure of a plurality of dielectric layers made of, for example, PZT (lead zirconate titanate) and electrode layers arranged between the plurality of dielectric layers.
- PZT lead zirconate titanate
- electrode layers arranged between the plurality of dielectric layers.
- 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 joining 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 from the inner surface of the housing 60 by a predetermined distance while 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 stretched or bent state. That is, the distance between the piezoelectric element 30 and the inner surface of the housing 60 is preferably larger than the maximum deformation amount of the piezoelectric element 30.
- the input unit 40 receives an operation input from the user, and includes, for example, an operation button (operation key).
- an operation button operation key
- the panel 10 can also accept the operation input from a user by detecting the contact from a user.
- the control unit 50 is a processor that controls the electronic device 1.
- the controller 50 applies a predetermined electrical signal (voltage corresponding to the audio signal) to the piezoelectric element 30.
- a predetermined electrical signal voltage corresponding to the audio signal
- the piezoelectric element 30 causes a deflection displacement in the thickness direction.
- the panel 10 to which the piezoelectric element 30 is attached is deformed in accordance with the displacement of the piezoelectric element 30, and the panel 10 vibrates. For this reason, the panel 10 generates air conduction sound.
- the panel 10 transmits a human body vibration sound to an object in contact with the panel 10. Examples of the object include a part of the user's body (such as cartilage in the outer ear).
- the control unit 50 can apply an electric signal corresponding to a voice signal related to the voice of the other party to the piezoelectric element 30 and generate air conduction sound and human body vibration sound corresponding to the voice signal.
- the audio signal may relate to a ringing melody or a music piece including music.
- the audio signal applied 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 a network. May be.
- 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 conducting sound by air conduction sound instead of human body vibration sound. It may be.
- the piezoelectric element 30 generates sufficient vibration in the panel 10 for use. It is possible to generate a human body vibration sound through a part of a person's body. Note that how much applied voltage is used can be appropriately adjusted according to the fixing strength of the panel 10 to the casing or the support member or the performance of the piezoelectric element 30.
- the control unit 50 applies an electrical signal to the piezoelectric element 30, the piezoelectric element 30 expands or contracts or bends in the longitudinal direction.
- the panel 10 to which the piezoelectric element 30 is attached is deformed in accordance with expansion / contraction or bending of the piezoelectric element 30, and the panel 10 vibrates.
- the panel 10 is bent by expansion / contraction or bending of the piezoelectric element 30.
- the panel 10 is bent directly by the piezoelectric element 30. “The panel 10 is directly bent by the piezoelectric element” means that the panel is specified by the inertial force of the piezoelectric actuator configured by arranging the piezoelectric element in the casing as used in a conventional panel speaker. This is different from the phenomenon in which the panel is deformed by exciting the region.
- the panel 10 is bent directly by the piezoelectric element” means that the expansion or contraction or bending (curving) of the piezoelectric element is directly applied to the panel via the bonding member or via the bonding member and the reinforcing member 80 described later. Means bending. For this reason, the panel 10 generates air conduction sound and, when the user contacts a part of the body (for example, cartilage of the outer ear), generates a human body vibration sound through the part of the body.
- the control unit 50 can generate an air conduction sound and a human body vibration sound corresponding to the voice signal by applying an electrical signal corresponding to the voice signal related to the voice of the other party to the piezoelectric element 30, for example.
- the audio signal may relate to a ringing melody or a music piece including music.
- the audio signal applied 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 a network. May be.
- the panel 10 vibrates not only in the attachment region to which the piezoelectric element 30 is attached, but also in a region away from the attachment region.
- the panel 10 has a plurality of locations that vibrate in a direction intersecting the main surface of the panel 10 in the vibrating region, and the amplitude value of the vibration is increased from positive to negative with time in each of the plurality of locations. Or vice versa.
- the panel 10 vibrates with a portion having a relatively large vibration amplitude and a portion having a relatively small vibration amplitude at random seemingly or periodically distributed over substantially the entire panel 10. That is, vibrations of a plurality of waves are detected over the entire panel 10.
- the control unit 50 does not attenuate the piezoelectric element 30 in order to prevent the above-described vibration of the panel 10 from being attenuated.
- the applied voltage may be ⁇ 15V. Therefore, the user can hear the sound by bringing his / her ear into contact with a region away from the above-described region where the panel 10 is attached.
- the panel 10 may be approximately the same size as the user's ear.
- the panel 10 may be larger than the user's ear, as shown in FIG.
- Panel 10 is an area wider than an area having a length corresponding to the distance from the lower leg of the anti-annulus (lower anti-limb) to the anti-tragus and a width corresponding to the distance from the tragus to the anti-annulus. Should just vibrate.
- the panel 10 preferably has a length corresponding to the distance between a portion near the upper leg of the ankle ring (upper pair leg) in the ear ring and the earlobe, and a distance between the tragus and a portion near the ear ring in the ear ring. It suffices that a region having a width corresponding to is vibrated.
- the length 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.
- the width direction is a direction 2b orthogonal to the longitudinal direction.
- 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 found by referring to the Japanese human body size database (1992-1994) created by the Human Life Engineering Research Center (HQL). If the panel 10 is larger than the average size of Japanese ears, the panel 10 is considered to be large enough to cover the entire foreign ear.
- the panel 10 can cover the user's ear by having the dimensions and shapes as described above, and is tolerant of misalignment when applied to the ear.
- the electronic device 1 can transmit air conduction sound and human body vibration sound via a part of the user's body (for example, 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 periphery of the electronic device 1 due to the vibration of the air due to the vibration of the panel 10 is less than that of the dynamic receiver. Therefore, the electronic device 1 is suitable for, for example, listening to a recorded message in a train or the like.
- the electronic device 1 generates a sound that the vibration of the panel 10 generated by the piezoelectric element 30 is transmitted to the inside of the human body.
- the sound transmitted to the inside of the human body vibrates the middle ear or the inner ear via the soft tissue of the human body (for example, cartilage).
- the electronic device 1 transmits a human body vibration sound by the vibration of the panel 10. Therefore, for example, even if the user wears an earphone or a headphone, the user can hear sound through the earphone or the headphone and a part of the body by bringing the electronic device 1 into contact therewith.
- the electronic device 1 transmits sound to the user by the vibration of the panel 10. Therefore, when the electronic device 1 does not include a separate 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.
- the sound emission port is preferably closed by a member that allows gas to pass but not liquid.
- a member that allows gas to pass but not liquid is Gore-Tex (registered trademark).
- FIG. 3 is a diagram illustrating a mounting structure of the electronic device 1 according to the first embodiment.
- 3A is a front view
- FIG. 3B is a cross-sectional view taken along line bb in FIG. 3A.
- the electronic device 1 shown in FIG. 3 is a smartphone in which a touch panel that is a glass plate is arranged 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, and the display unit 20 and the piezoelectric element 30 are bonded to the panel 10 by a joining member 70, respectively.
- the joining member 70 is an adhesive having a thermosetting property or an ultraviolet curable property, a double-sided tape, or the like, and may be, for example, an optical elastic resin that is a colorless and transparent acrylic ultraviolet curable adhesive.
- the panel 10, the display part 20, and the piezoelectric element 30 are each substantially rectangular.
- the display unit 20 is disposed approximately at the center of the panel 10 in the short direction.
- the piezoelectric element 30 is disposed at a predetermined distance from an end portion in the longitudinal direction of the panel 10 and is arranged in the vicinity of the end portion so 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 inner surface of the panel 10.
- an FPC (flexible printed circuit board) 25 is connected to the piezoelectric element 30.
- the FPC 25 transmits an electric signal applied from the control unit 50 to the piezoelectric element 30.
- the electrical signal from the control unit 50 is transmitted to the piezoelectric element 30 via the FPC 25.
- the FPC 25 is configured by laminating a base 25a, signal lines 25b and 25c, and a cover lay 25d in this order.
- the base 25a and the coverlay 25d are formed of a resin such as polyimide, for example.
- the base 25a is a base material of the FPC 25 and is an example of a resin member.
- the signal lines 25b and 25c are formed of, for example, copper foil or bronze foil.
- the base 25a and the signal lines 25b and 25c and the signal lines 25b and 25c and the cover lay 25d are bonded with an adhesive (not shown) such as a thermosetting resin.
- FIG. 4 is a perspective view showing a state where the FPC 25 and the piezoelectric element 30 are connected.
- FIG. 5 is a view of the FPC 25 and the piezoelectric element 30 shown in FIG. 4 as viewed in the thickness direction of the FPC 25 or the piezoelectric element 30.
- the piezoelectric element 30 has a long shape.
- the piezoelectric element 30 has a flat plate shape.
- the piezoelectric element 30 has a first main surface 30a and a second main surface 30d.
- the electrical connection between the FPC 25 and the piezoelectric element 30 is mainly performed in the end region in the longitudinal direction of the first main surface 30a of the piezoelectric element 30.
- the FPC 25 and the piezoelectric element 30 are electrically connected at the left end in the longitudinal direction of the piezoelectric element 30.
- the connection structure between the FPC 25 and the piezoelectric element 30 will be described in detail later.
- the base 25a of the FPC 25 is formed thicker than the other regions of the base 25a.
- the area of the base 25a that is not connected to the piezoelectric element 30 is, for example, about 0.03 mm, whereas the vicinity of the connection portion with the piezoelectric element 30 is formed to a thickness of, for example, about 0.4 mm.
- the base 25 a may have the same thickness in a region not connected to the piezoelectric element 30 and the thickness in the vicinity of the connection portion with the piezoelectric element 30.
- the base 25a in the vicinity of the connection portion between the FPC 25 and the piezoelectric element 30 By forming the base 25a in the vicinity of the connection portion between the FPC 25 and the piezoelectric element 30 to be relatively thick, for example, when an external force is applied to the connection portion between the FPC 25 and the piezoelectric element 30, the FPC 25 and the piezoelectric element 30 are separated. It becomes difficult to do.
- the portion of the base 25a that is formed relatively thick covers the first main surface 30a of the piezoelectric element 30.
- a relatively thick portion of the base 25 a covers substantially the entire first main surface 30 a of the piezoelectric element 30.
- the substantially whole or the whole of the 1st main surface 30a means 80% or more of the whole 1st main surface 30a, for example. As long as damage to the piezoelectric element 30 can be reduced, the first main surface 30a may not be completely covered.
- the relatively thick portion of the base 25a extends to the end opposite to the connecting portion with the FPC 25 in the longitudinal direction of the piezoelectric element 30 (the right end in the longitudinal direction of the piezoelectric element 30 in FIG. 4). It is installed.
- the second main surface 30 d that is not covered by the base 25 a is bonded to the panel 10 by the bonding member 70.
- FIG. 6 is a view showing a connection portion between the FPC 25 and the piezoelectric element 30.
- FIG. 6A is a view of the connecting portion on the FPC 25 side as viewed from the cover lay 25d side.
- FIG. 6B is a view of the connection portion on the piezoelectric element 30 side as viewed from the first main surface 30a side.
- FIG. 6A at the connecting portion on the FPC 25 side, a part of each of the signal line 25b and the signal line 25c is exposed from the cover lay 25d.
- the positive electrode terminal 30b and the negative electrode terminal 30c are exposed from the first main surface 30a at the connection portion on the piezoelectric element 30 side.
- the signal line 25b of the FPC 25 is connected to the plus side electrode terminal 30b of the piezoelectric element 30, and the signal line 25c of the FPC 25 is minus side electrode terminal 30c of the piezoelectric element 30.
- the FPC 25 and the piezoelectric element 30 are bonded by a method called ACP (Anisotropic Conductive Paste) connection or ACF (Anisotropic Conductive Film) connection described later.
- FIG. 7 is a diagram illustrating a first example of a connection structure between the FPC 25 and the piezoelectric element 30.
- FIG. 8 is a diagram illustrating a second example of a connection structure between the FPC 25 and the piezoelectric element 30.
- An anisotropic conductive material 100 is used for ACP connection or ACF connection.
- the anisotropic conductive material 100 is mainly configured by mixing conductive particles in a binder (adhesive).
- the binder is a member for mechanically fixing the connection portion, while the conductive particles are members for electrically connecting the opposing electrodes.
- the binder is, for example, a thermosetting synthetic rubber resin.
- the conductive particles are obtained by applying gold plating to a sphere of resin such as polystyrene.
- the conductive particles may be a metal core such as nickel plated with gold or the metal core itself.
- FIG. 7 shows a state in which the FPC 25 and the piezoelectric element 30 are connected by thermocompression bonding.
- 7 is a cross-sectional view taken along the line VII-VII in FIG.
- 100a indicates a binder (adhesive)
- 100b indicates conductive particles.
- the signal lines 25b and 25c of the FPC 25 and the positive electrode terminal 30b and the negative electrode terminal 30c of the piezoelectric element 30 are mechanically and electrically connected to each other by the conductive particles 100b sandwiched therebetween. Is done.
- the binder is an insulator, the insulating property is maintained between the conductive particles 100b.
- the positive electrode terminal 30b and the negative electrode terminal 30c of the piezoelectric element 30 are depicted as being electrically connected via the signal lines 25b and 25c of the FPC 25 and the conductive particles 100b. Yes.
- the signal line 25b and the signal line 25c are arranged apart from each other in the direction along the main surface of the piezoelectric element 30 (direction perpendicular to the paper surface of FIG. 7), as shown in FIG.
- the signal line 25b is connected to the positive electrode terminal 30b but not connected to the negative electrode terminal 30c.
- the signal line 25c is connected to the negative electrode terminal 30c but not connected to the positive electrode terminal 30b.
- the base 25 a extends from the vicinity of the connecting portion between the FPC 25 and the piezoelectric element 30 along the longitudinal direction of the piezoelectric element 30.
- the base 25 a covers the first main surface 30 a of the piezoelectric element 30.
- substantially the entire first main surface 30a of the piezoelectric element 30 is covered with the base 25a made of a resin such as polyimide.
- the housing 60 is deformed, for example, when the electronic device 1 falls on the ground, and the deformed housing 60 collides with the piezoelectric element 30 and the piezoelectric element 30 is not easily damaged.
- the plus electrode 30b and the minus electrode 30c provided on the first main surface 30a of the piezoelectric element 30 are covered with the insulating base 25a, a metal member (for example, near the piezoelectric element 30 in the housing 60)
- a metal member for example, near the piezoelectric element 30 in the housing 60
- connection structure between the FPC 25 and the piezoelectric element 30 will be described with reference to FIG.
- description of the same configuration as that of the first example will be omitted, and different portions will be mainly described.
- the signal line 25c of the FPC 25 extends to the vicinity of the right end in the longitudinal direction of the piezoelectric element 30 (the left-right direction in FIGS. 7 and 8).
- the negative electrode terminal 30c is provided in the vicinity of the right end portion in the longitudinal direction of the piezoelectric element 30, but is not provided in the vicinity of the central portion in the longitudinal direction of the piezoelectric element 30 and in the vicinity of the positive electrode terminal 30b.
- the plus side electrode terminal 30 b is provided in the vicinity of the left end in the longitudinal direction of the piezoelectric element 30. That is, the FPC 25 and the piezoelectric element 30 are connected to the signal line 25b and the plus side electrode terminal 30b at one end in the longitudinal direction of the piezoelectric element 30 and to the signal line 25c and the plus side electrode 30c at the other end.
- the cover lay 25d of the FPC 25 is positioned between the signal lines 25b and 25c and the piezoelectric element 30 in the vicinity of the central portion in the longitudinal direction of the piezoelectric element 30.
- the element 30 does not conduct unnecessarily.
- the plus-side electrode terminal 30b of the piezoelectric element 30 is arranged near one end in the longitudinal direction, and the minus-side electrode terminal 30c is arranged near the other end in the longitudinal direction. Therefore, it is difficult for the positive electrode terminal 30b and the negative electrode terminal 30c to be short-circuited by the conductive particles 100b.
- the area on which the negative electrode terminal 30 c is arranged on the first main surface 30 a of the piezoelectric element 30 is small, so that the piezoelectric element 30 is easily bent.
- the negative electrode terminal 30c is provided only in the vicinity of the right end portion in the longitudinal direction of the piezoelectric element 30, and is provided in the vicinity of the central portion in the longitudinal direction of the piezoelectric element 30 and in the vicinity of the positive electrode terminal 30b. Although it was not done, it is not limited to this. If the minus side electrode terminal 30c is arranged so as not to be short-circuited with the plus side electrode terminal 30b by the conductive particles 100b of the anisotropic conductive material, the minus side electrode terminal 30c and the plus side in the longitudinal direction of the piezoelectric element 30 It may be provided in the vicinity of the electrode terminal 30b.
- connection structure between the FPC 25 and the piezoelectric element 30 will be described with reference to FIG.
- description of the same configurations as those of the first example and the second example described above will be omitted, and different portions will be mainly described.
- the structure in the vicinity of the central portion in the longitudinal direction of the piezoelectric element 30 is different.
- the FPC 25 and the piezoelectric element 30 are configured such that the signal line 25 b and the positive electrode terminal 30 b are connected by an anisotropic conductive material 100 at one end in the longitudinal direction of the piezoelectric element 30 and the other end.
- the signal line 25 c and the positive electrode 30 c are connected by the anisotropic conductive material 100.
- a gap 29 is formed between the negative electrode terminal 30c near the center of the piezoelectric element 30 in the longitudinal direction and the cover lay 25d. That is, the minus side electrode terminal 30c and the cover lay 25d are arranged apart from each other by a predetermined distance.
- the FPC 25 and the piezoelectric element 30 are connected at both ends in the longitudinal direction of the piezoelectric element 30 and are not connected in the vicinity of the central portion of the piezoelectric element 30 in the longitudinal direction. Thereby, while ensuring electrical continuity between the two, deformation of the piezoelectric element 30 is less likely to be inhibited by the FPC 25, and the panel 10 can be efficiently vibrated by the piezoelectric element 30.
- the piezoelectric element 30 is deformed by applying a voltage as described above.
- the FPC 25 has a portion facing the vicinity of the central portion in the longitudinal direction of the piezoelectric element 30 to such an extent that the deformation of the piezoelectric element 30 is not hindered. It may be bent.
- substantially the entire first main surface 30a of the piezoelectric element 30 is covered with the FPC 25 means that the substantially entire main surfaces of both elements are anisotropically conductive as shown in the first and second examples.
- This is a concept including both a structure bonded by the material 100 and a structure in which both are connected only at both ends in the longitudinal direction of the piezoelectric element 30 as shown in the third example.
- an elastic member such as a sponge may be disposed in the gap 29.
- FIG. 10 is a diagram illustrating the FPC 25 and the piezoelectric element 30 according to the first modification.
- the FPC 25 is connected to the piezoelectric element 30 as in FIGS. 7 and 8, but is also connected to the electronic component 55.
- the FPC 25 is further extended from the longitudinal end of the piezoelectric element 30.
- An electronic component 55 is connected to the end of the FPC 25.
- the electronic component 55 is, for example, an illuminance sensor, a proximity sensor, a camera, or an infrared communication unit.
- the FPC 25 has a signal line connected to the electronic component 55 in addition to the signal lines 25b and 25c connected to the piezoelectric element 30 described above.
- the FPC 25 covering the entire first main surface 30a of the piezoelectric element 30 is further extended, and the electronic component 55 is provided at the end of the extended portion (extension portion), whereby the piezoelectric element 30 is provided.
- the electronic component 55 can be connected to a circuit board (not shown) by one FPC 25, and the number of components can be reduced. Since the FPC 25 is also deformed due to the deformation of the piezoelectric element 30, it is conceivable that the deformation of the FPC 25 is transmitted to the electronic component 55 and the electronic component 55 vibrates. In this case, the vibration of the electronic component 55 can be reduced by covering the electronic component 55 with an elastic member such as a sponge. In addition, you may make it not apply tension
- the second main surface 30d of the piezoelectric element 30 is bonded to the panel 10 by the bonding member 70, and the first main surface of the piezoelectric element 30 opposite to the second main surface 30d.
- the base 30a of the FPC 25 covers 30a. That is, the piezoelectric element 30 is disposed between the panel 10 and the FPC 25.
- the configuration of the electronic apparatus 1 according to the present invention is not limited to this.
- FIG. 11 is a diagram showing the panel 10, the FPC 25, and the piezoelectric element 30 according to the second modification.
- the FPC 25 is disposed between the panel 10 and the piezoelectric element 30.
- a base 25a is attached to the panel 10 by a joining member 70
- a cover lay 25d of the FPC 25 is attached to the piezoelectric element 30 by the ACF connection described above.
- an FPC 25 whose base material is made of a resin such as polyimide is disposed between the panel 10 and the piezoelectric element 30.
- the surface of the piezoelectric element 30 opposite to the surface attached to the FPC 25 is exposed inside the electronic device 1.
- the exposed surface may be configured to be covered with a protective member made of resin or the like. With this configuration, it is possible to make it difficult to cause damage to the piezoelectric element 30 due to the case 60 deformed due to the drop of the electronic device 1 colliding with the piezoelectric element 30 in the same manner as described above.
- FPC25 illustrated attaching to the panel 10 by the joining member 70 it is not limited to this.
- the FPC 25 may be attached to the panel 10 by the ACF connection described above.
- another signal line different from the signal lines 25 b and 25 c connected to the piezoelectric element 30 is further provided for the FPC 25, and the other signal line is connected to an electrode terminal provided on the panel 10. It can be. According to this configuration, it is possible to apply an electrical signal not only to the piezoelectric element 30 but also to the panel 10 via the FPC 25.
- the FPC 25 and the piezoelectric element 30 may be connected not by ACF connection but by a solder member.
- FIG. 12 is a diagram illustrating an example of vibration of the panel 10 of the electronic device 1 according to the first embodiment.
- the display unit 20 is attached to the panel 10.
- the lower part of the panel 10 is less likely to vibrate than the upper part of the panel 10 to which the piezoelectric element 30 is attached. Therefore, sound leakage due to vibration of the lower portion of the panel 10 at the lower portion of the panel 10 can be reduced.
- the upper part of the panel 10 is directly bent by the piezoelectric element 30, and the vibration is attenuated at the lower part as compared with the upper part.
- the panel 10 is bent by the piezoelectric element 30 so that the portion directly above the piezoelectric element 30 protrudes higher than the surrounding area in the long side direction of the piezoelectric element 30. Further, the panel 10 is bent by the piezoelectric element 30 so that the portion directly above the piezoelectric element 30 protrudes higher than the surrounding area in the long side direction of the panel 10.
- 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 that contacts the deformed panel 10 is detected. It conveys air conduction sound and human body vibration sound. As the piezoelectric element 30 is deformed, the FPC 25 is also deformed. Accordingly, since the air conduction sound and the human body vibration sound can be transmitted to the user without causing the vibration body to protrude from the outer surface of the housing 60, a patent that makes a vibration body that is much smaller than the housing contact the human body. Usability is improved as compared with the electronic device described in Document 1.
- the piezoelectric element 30 itself is not easily damaged. Further, when the case 60 is deformed instead of the panel 10, the user tends to drop the terminal when generating vibration, whereas when the panel 10 is vibrated, Things are hard to happen.
- the piezoelectric element 30 is joined to the panel 10 by a joining member 70.
- the joining member 70 can be a non-heating type curable adhesive.
- thermal stress shrinkage hardly occurs between the piezoelectric element 30 and the panel 10 at the time of curing.
- the joining member 70 can be a double-sided tape.
- FIG. 13 is a diagram illustrating a mounting structure of the electronic device 1 according to the second embodiment.
- 13 (a) is a front view
- FIG. 13 (b) is a cross-sectional view taken along line bb in FIG. 13 (a)
- FIG. 13 (c) is taken along line cc in FIG. 13 (a). It is sectional drawing.
- the electronic device 1 shown in FIG. 13 is a foldable mobile phone in which a cover panel (acrylic plate) that protects the display unit 20 as the panel 10 is arranged on the front surface of the upper housing 60.
- a reinforcing member 80 is disposed between the panel 10 and the piezoelectric element 30.
- the reinforcing member 80 is a resin plate including, for example, a resin plate, sheet metal, 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.
- the display unit 20 is not bonded to the panel 10 but is supported 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 that is a part of the housing 60 are bonded by the bonding member 70. Structure.
- the support part 90 is not limited to the structure as a part of the housing
- FIG. 14 is a diagram illustrating an example of vibration of the panel 10 of the electronic device 1 according to the second embodiment.
- the panel 10 is an acrylic plate having lower rigidity than the glass plate, and the display unit 20 is not bonded to the back surface of the panel 10. Therefore, the amplitude generated by the piezoelectric element 30 is larger than that of the electronic apparatus 1 according to the first embodiment shown in FIG.
- the panel 10 vibrates not only in the attachment region to which the piezoelectric element 30 is attached, but also in a region away from the attachment region. For this reason, the user can hear the human body vibration sound by bringing his / her ear into contact with an arbitrary position of the panel 10 in addition to the air conduction sound via air.
- 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 human body vibration sound are transmitted to the object in contact with the panel 10.
- the piezoelectric element 30 is attached to the surface of the panel 10 on the inside of the housing 60. For this reason, the air conduction sound and the human body vibration sound can be transmitted to the user without causing the vibrating body to protrude from the outer surface of the housing 60.
- the panel 10 is deformed to transmit air conduction sound and human body vibration sound not only in the attachment region to which the piezoelectric element 30 is attached but also in any part of the panel 10. For this reason, the user can hear the human body vibration sound by bringing his / her ear into contact with an arbitrary position of the panel 10 in addition to the air conduction sound via air.
- 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 is transmitted to the piezoelectric element 30 and the piezoelectric element 30 may be damaged. Can be reduced. Moreover, even if the panel 10 is brought into strong contact with the human body, the vibration of the panel 10 can be hardly attenuated. Further, by disposing 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. Instead of the reinforcing member 80, a plate-like weight may be attached to the piezoelectric element 30 by the joining member 70.
- FIG. 15 is a diagram showing the structure of the electronic device 1 according to the third embodiment of the present invention.
- 15A is a front view
- FIG. 15B is a cross-sectional view taken along line YY in FIG. 15A.
- the electronic device 1 shown in FIG. 15 is a smartphone in which a touch panel, which is a glass plate, is arranged on the front surface of a housing 60 (for example, a metal or resin case) as the panel 10.
- the panel 10 is attached to the housing 60 by being joined to the housing 60 by the joining member 70.
- the joining member 70 is, for example, an adhesive or a double-sided tape.
- the display unit 20 and the piezoelectric element 30 are attached to the panel 10 by a bonding member 70.
- a joining member 70 suitable for attaching the display unit 20 to the panel 10 for example, there is an optical elastic resin which is a colorless and transparent acrylic ultraviolet curable adhesive.
- the bonding member 70 suitable for attaching the piezoelectric element 30 to the panel 10 include a double-sided tape having a waterproof property and an adhesive having a thermosetting property or an ultraviolet curable property.
- the input unit 40 is attached to the housing 60 in the same manner as the panel 10.
- the panel 10, the display part 20, and the piezoelectric element 30 are each substantially rectangular.
- the display unit 20 is disposed approximately at the center of the panel 10 in the short direction.
- the piezoelectric element 30 is provided at a predetermined distance from the end of the panel 10 in the longitudinal direction so that the longitudinal direction of the piezoelectric element 30 is along the short side of the panel 10 in the vicinity of the end.
- the display unit 20 and the piezoelectric element 30 are provided side by side in a direction parallel to the inner surface of the panel 10.
- the electronic device 1 has the above-described configuration, so that 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 that contacts the deformed panel 10. Air conduction sound and vibration sound can be transmitted to objects.
- FIG. 16 is a diagram illustrating an example of vibration of the panel 10 of the electronic device 1 according to the third embodiment of the present invention.
- the piezoelectric element 30 is attached to the upper part of the panel 10, and the display unit 20 is attached below the upper part.
- the panel 10 is bent by the piezoelectric element 30 so that the portion directly above the piezoelectric element 30 protrudes higher than the surrounding area in the long side direction 2a of the panel 10.
- the lower part of the panel 10 is less likely to vibrate compared to the upper part of the panel 10 to which the piezoelectric element 30 is attached because the display unit 20 is attached. Therefore, sound leakage due to vibration of the lower portion of the panel 10 at the lower portion of the panel 10 can be reduced.
- the electronic device 1 transmits sound by the vibration of the panel 10.
- the piezoelectric element 30 is attached to the housing 60 and the housing 60 is vibrated, the electronic device is dropped due to the vibration of the housing 60 when the user picks up the electronic device and talks. (Normally, a user makes a call by holding the casing of the electronic device). On the other hand, such a problem hardly occurs in the electronic device 1 that vibrates the panel 10. Of course, when the vibration is not so great, the piezoelectric element 30 may be attached to the housing 60.
- the protective member 85 is attached.
- the protective member 85 is made of, for example, an elastic member such as an organic synthetic rubber typified by polybutadiene, nitrile, or chloroprene, or an inorganic synthetic rubber such as silicone. Further, the protective member 85 may be a curable resin having thermosetting properties, thermoplastic properties, moisture curable properties, ultraviolet curable properties, and the like.
- the protective member 85 may be made of a composite of an organic material and an inorganic material (or metal).
- a composite member obtained by using a polyamide-based resin as a base material and including glass fiber, metal fiber, carbon fiber, or the like may be used.
- the strength, rigidity, and elasticity are appropriately adjusted according to the amount of glass fiber, metal fiber, carbon fiber, or the like added to the polyamide resin.
- the reinforced resin as described above is formed, for example, by impregnating a resin into a base material formed by braiding glass fiber, metal fiber, carbon fiber, or the like and curing it.
- the reinforced resin may be formed by mixing a fiber piece finely cut into a liquid resin and then curing it.
- the reinforced resin may be a laminate of a base material in which fibers are knitted and a resin layer.
- a protective member 85 is attached to the second main surface of the piezoelectric element 30. Therefore, for example, the piezoelectric element 30 and other members disposed in the vicinity of the piezoelectric element 30 due to an impact caused by dropping of the electronic device 1 or the like (for example, a corner or an electronic component protruding inside the housing 60). Can be prevented from being damaged by the protection member 85 mitigating the impact caused by the contact.
- the protective member 85 may have a curved shape in which the surface of the protective member 85 opposite to the surface attached to the piezoelectric element 30 is convex. For example, as shown in FIG. 15B, when the protective member 85 has a convex curved shape in a cross section along the YY line, the protective member 85 has a flat plate shape and a convex shape. It has been empirically found that the piezoelectric element 30 is easily deformed as the piezoelectric element 30 is deflected as compared with the case where the thickness of the protective member is the same as that of the thickest portion.
- the protective member 85 has a convex curved shape, it is difficult to inhibit the deformation of the piezoelectric element 30 as compared with the case where the protective member 85 has a flat plate shape. While reducing, damage to the piezoelectric element 30 due to external force can be reduced.
- an organic or inorganic synthetic rubber is provided with a planar shape portion for attaching to the piezoelectric element 30 and a curved shape portion facing the planar shape portion.
- the protective member may be processed and attached to the piezoelectric element 30, or the above-described curable resin may be applied or dropped onto the surface of the piezoelectric element 30 opposite to the surface to be attached to the panel 10 and cured. 85 may be formed.
- the curable resin has a certain degree of viscosity at room temperature even before being cured, and when applied or dropped onto the piezoelectric element 30, the curable resin has a curved shape due to the surface tension of the curable resin. It can be formed and cured with the curved shape.
- the protection member 85 covers the second main surface of the piezoelectric element 30, but is not limited thereto, and the protection member 85 extends from the surface in addition to the second main surface of the piezoelectric element 30.
- the side surface to be covered may be covered.
- the protection member 85 may be configured to cover the surface of the piezoelectric element 30 other than the first main surface. With such a configuration, the protective member 85 can relieve even an impact on the side surface of the piezoelectric element 30.
- FIG. 17 is a diagram showing a first modification of the third embodiment of the present invention.
- 17A is a rear view of the panel 10 to which the piezoelectric element 30 is attached in the electronic apparatus 1
- FIGS. 17B and 17D are cross sections taken along line XX in FIG. 17A. The figure is shown for each pattern, and FIGS. 17C and 17E show cross-sectional views along the line YY in FIG. 17A for each pattern.
- FIG. 17A shows a surface of the panel 10 that is visually recognized from the side where the piezoelectric element 30 is disposed (the same applies to the following modifications).
- the piezoelectric element 30 is covered with the protective member 85, the surface of the panel 10 on the side where the piezoelectric element 30 is arranged is not visually recognized.
- the portion of the piezoelectric element 30 is shown in white so that the piezoelectric element 30 can be visually recognized. Yes (the same applies to the following modifications).
- an intermediate member 110 is disposed between the panel 10 and the piezoelectric element 30.
- the intermediate member 110 is attached to the panel 10 and the piezoelectric element 30 by a first bonding member 71 (for example, double-sided tape) or a second bonding member 81 (for example, an adhesive made of a curable resin).
- the intermediate member 110 is, for example, the reinforced resin described above.
- An FPC (Flexible Printed Circuits) 120 is attached to the surface (second main surface) opposite to the surface (first main surface) attached to the intermediate member 110 in the piezoelectric element 30.
- the terminal portion of the FPC 25 and the electrode terminal portion provided in the piezoelectric element 30 are, for example, a solder material or an anisotropic conductive material in which conductive particles are mixed in an electrically insulating resin (Anisotropic Conductive Paste, or , Anisotropic Conductive Film) and the like are bonded and connected.
- a solder material or an anisotropic conductive material in which conductive particles are mixed in an electrically insulating resin (Anisotropic Conductive Paste, or , Anisotropic Conductive Film) and the like are bonded and connected.
- the FPC 25 is attached to the left end of the second main surface of the piezoelectric element 30, extends from the attached portion, and is electrically connected to the control unit 50 (not shown). The applied electric signal is transmitted to the piezoelectric element 30.
- a protective member 85 is attached to the second main surface of the piezoelectric element 30.
- the protective member 85 actually covers both the piezoelectric element 30 and the FPC 25. Are disposed. Accordingly, in FIG. 17A, a part of the FPC 25, in particular, a part attached to the piezoelectric element 30 is covered with the protective member 85 and is not visually recognized. Therefore, such a part is indicated by a dotted line. Yes.
- the protection member 85 may be configured to be attached to the piezoelectric element 30 so as to avoid the region where the FPC 25 is attached on the second main surface of the piezoelectric element 30. In the following modification examples, the arrangement of the FPC 25 is the same, and therefore the description of the FPC 25 is omitted unless otherwise noted.
- the protective member 85 has a convex surface (the upper surface in FIGS. 17B, 17C, 17D, and 17E) opposite to the surface attached to the piezoelectric element 30 of the protective member 85. It has a curved shape. By having such a shape, it is difficult to inhibit the deformation of the piezoelectric element 30 as compared with the case where the protective member 85 has a flat plate shape. Damage can be reduced.
- the protection member 85 covers the second main surface of the piezoelectric element 30, but is not limited thereto, and the protection member 85 extends from the surface in addition to the second main surface of the piezoelectric element 30.
- the side surface to be covered may be covered. With such a configuration, the protective member 85 can relieve even an impact on the side surface of the piezoelectric element 30.
- the intermediate member 110 has a larger surface area attached to the piezoelectric element 30 than the area of the first main surface of the piezoelectric element 30. .
- the intermediate member 110 has a surface larger than the first main surface of the piezoelectric element 30 in the XX direction and the YY direction, and a curable resin as the protective member 85 is covered so as to cover the surface.
- a curable resin as the protective member 85 is covered so as to cover the surface.
- the surfaces other than the first main surface of the piezoelectric element 30 can be covered with resin.
- the intermediate member 110 having a surface larger than the first main surface of the piezoelectric element 30 is disposed between the piezoelectric element 30 and the panel 10, the dripping curable resin adheres to the panel 10. The risk of doing so can be reduced.
- the intermediate member 110 has a concave shape, and the opening surface is attached to the panel 10.
- a space formed between the panel 10 and the intermediate member 110 is filled with, for example, a curable resin as the second bonding member 81 (the curable resin is, for example, a part of the intermediate member 110). Injected through the through-hole 100 formed in the above).
- one or more grooves are formed on the inner surface of the intermediate member 110.
- FIG. 18 is a diagram showing a second modification of the third embodiment of the present invention.
- 18A is a rear view of the panel 10 to which the piezoelectric element 30 is attached in the electronic apparatus 1
- FIG. 18B is a cross-sectional view taken along line XX in FIG. 18A
- FIG. FIG. 18C is a sectional view taken along line YY in FIG.
- the piezoelectric element 30 is attached to the panel 10 by a first joining member 71 and a second joining member 81.
- a frame member 95 that surrounds the piezoelectric element 30 is attached to the panel 10.
- the piezoelectric element 30 has an edge region on the first main surface of the piezoelectric element 30 attached to the panel 10 by a first joining member 71.
- the first joining member 71 is, for example, a double-sided tape.
- the first bonding member 71 is not attached to the entire area of the edge of the first main surface of the piezoelectric element 30. That is, the region where the first bonding member 71 is attached to the piezoelectric element 30 is not a closed region.
- the first joining member is not disposed at a part of the left end in the XX direction on the first main surface of the piezoelectric element 30.
- the portion where the first bonding member is not disposed serves as a passage for the curable resin as the second bonding member 81, which will be described later.
- the region other than the edge region on the first main surface of the piezoelectric element 30 is attached to the panel 10 by the second bonding member 81.
- the second bonding member 81 is, for example, a curable resin.
- the curable resin is poured into a substantially box-shaped mold including the panel 10 and the inner wall surface of the frame member 95 in a state where the piezoelectric element 30 is attached to the panel 10 by the first bonding member 71 in advance.
- the panel 10 and the piezoelectric element 30 can be attached after entering the space between the piezoelectric element 30 and the piezoelectric element 30 and curing.
- the curable resin enters the space between the panel 10 and the piezoelectric element 30 through a portion of the piezoelectric element 30 where the first bonding member is not disposed.
- the piezoelectric element 30 is attached to the panel 10 by the first bonding member 71 in advance, so that the space between the piezoelectric element 30 and the panel 10 is maintained and cured in the space.
- the resin can be cured with a sufficient thickness of the resin, and as a result, the piezoelectric element 30 and the panel 10 can be more firmly attached.
- FIG. 18B shows a configuration in which the first joining member is not disposed at a part of the left end in the XX direction on the first main surface of the piezoelectric element 30, but is not limited thereto.
- a part where the first joining member is not provided may be provided in a part of the right end opposite to the left end.
- the curable resin as the second bonding member 81 may be poured into substantially the entire box-shaped internal space formed by the panel 10 and the inner wall surface of the frame member 95. Thereby, for example, when the inner wall surface of the frame member 95 is higher than the second main surface of the piezoelectric element 30 (the upper surface of the piezoelectric element 30), the second main surface and the side surface of the piezoelectric element 30 are covered with the curable resin. (That is, substantially the entire piezoelectric element 30 is covered with resin). With such a configuration, the curable resin as the second bonding member 81 can mitigate the propagation of impact to the piezoelectric element 30 due to an external force in the same manner as the protective member 85 described above.
- the 2nd junction member 81 in this modification has an effect equivalent to protection member 85 in the present invention. Further, by fixing the piezoelectric element 30 with a curable resin, for example, the possibility that the piezoelectric element 30 is detached from the panel 10 when an impact is applied from the outside can be reduced.
- the piezoelectric element 30 attached to the panel 10 is made of resin.
- a covered structure can be easily realized.
- the configuration in which the piezoelectric element 30 is attached to the panel 10 by the first bonding member 71 and the second bonding member 81 is shown, but the configuration is not necessarily limited to this. There is no need, and the piezoelectric element 30 may be configured to be attached to the panel 10 by only one of the first bonding member 71 and the second bonding member 81. For example, the entire first main surface of the piezoelectric element 30 may be attached to the panel 10 with a double-sided tape as the first bonding member 71.
- the double-sided tape used here is, for example, a sheet having a three-layer structure in which the upper and lower surfaces of a polymer film are covered with an adhesive, which is rich in flexibility and difficult to inhibit the deformation of the piezoelectric element 30 and thus has a sound pressure characteristic.
- an adhesive which is rich in flexibility and difficult to inhibit the deformation of the piezoelectric element 30 and thus has a sound pressure characteristic.
- the piezoelectric element 30 and the panel 10 can be more firmly attached, and the impact on the panel 10 and the like can be reduced. Therefore, the possibility that a part of the piezoelectric element 30 peels from the panel 10 can be reduced.
- the first joining member 71 may be attached to the entire region of the edge of the first main surface of the piezoelectric element 30 (that is, the region to which the first joining member 71 is attached may form a closed region). In this case, regions other than the edge region on the first main surface of the piezoelectric element 30 are not joined to the panel 10 via the joining member. Therefore, the region other than the edge region on the first main surface of the piezoelectric element 30 is a region where deformation of the piezoelectric element 30 is not hindered by the bonding member.
- the inhibition of deformation of the piezoelectric element 30 is reduced.
- the sound pressure characteristics of the electronic device 1 can be improved.
- FIG. 19 is a diagram showing a third modification of the third embodiment of the present invention.
- 19A is a rear view of the panel 10 to which the piezoelectric element 30 is attached in the electronic apparatus 1
- FIGS. 19B, 19D, 19F, and 19H are X in FIG. 19A
- 19C, 19E, 19G, and 19I are cross-sectional views taken along the line YY in FIG. 19A, respectively. This is shown for each pattern.
- the present modification has a frame member 95 provided in the electronic device 1 having a bottom surface portion extending to the wall surface portion in addition to the wall surface portion surrounding the piezoelectric element 30. Is different.
- a bottom surface portion of the frame member 95 is disposed between the panel 10 and the piezoelectric element 30, and is attached to the panel 10 and the piezoelectric element 30 by a first bonding member 71 and a second bonding member 81.
- the surface of the piezoelectric element 30 attached to the bottom surface portion of the frame member 95 is referred to as a first main surface.
- the piezoelectric element 30 has an edge region on the first main surface of the piezoelectric element 30 attached to the bottom surface of the frame member 95 by a first bonding member 71 (for example, double-sided tape).
- FIGS. 19B and 19C the bottom surface portion of the frame member 95 is attached to the panel 10 by the first joining member 71 at the edge region of the bottom surface portion.
- the frame member 95 has a substantially box shape including a wall surface portion and a bottom surface portion, the curable resin as the second bonding member 81 can be poured into the frame member 95. Therefore, the piezoelectric element 30 can be fixed with resin inside the frame member 95, and as a result, the piezoelectric element 30 can hardly be detached from the bottom surface portion of the frame member 95.
- the curable resin poured into the frame member 95 is a piezoelectric element having a part of the edge region of the first main surface of the piezoelectric element 30 where the first bonding member 71 is not provided as a passage path. 30 and the bottom surface of the frame member 95 can also enter, and the piezoelectric element 30 and the frame member 95 can be fixed by the resin.
- the bottom surface of the frame member 95 may have a through hole in part.
- a through hole is provided near the left end in the XX direction on the bottom surface of the frame member 95.
- the curable resin poured into the frame member 95 enters the space between the bottom surface portion of the frame member 95 and the panel 10 through the through hole.
- a panel 10 can be attached. Note that, as described above, in FIGS. 19B and 19C (pattern 1), the edge region of the bottom surface portion of the frame member 95 is attached to the panel 10 by the first joining member 71. A space for allowing the curable resin to enter can be formed between the bottom portion and the panel 10.
- FIG. Such a portion is formed by, for example, air existing in the space when the curable resin enters the space between the bottom surface portion and the panel 10 through a through hole formed in the bottom surface portion of the frame member 95. Can be used as a path for exhausting air. It should be noted that the air exhaust path has an end portion (XX direction opposite to the end portion on the side where the through-hole is formed in the bottom surface portion of the frame member 95 as shown in FIG. 19B. In the case of being provided in the vicinity of the right end in FIG.
- the bottom surface portion of the frame member 95 does not necessarily have the edge region of the bottom surface portion attached to the panel 10 by the first joining member 71.
- the second bonding member 81 is provided between the panel 10 and the bottom surface of the frame member 95 by making the panel 10 concave. It is possible to provide a space for intrusion.
- FIGS. 19 (f), (g) (pattern 3), (h), (i) (pattern 4) show a case where no through hole is formed in the bottom surface of the frame member 95.
- 19 (f), (g) (pattern 3) the edge region of the bottom surface of the frame member 95 is attached to the panel 10 by the first joining member 71, and the bottom surface of the frame member 95 in the panel 10 is A through hole 100 is formed in the panel 10 on the inner side of the attached region.
- the bottom surface portion of the frame member 95 does not necessarily have the edge region of the bottom surface portion attached to the panel 10 by the first joining member 71.
- the second bonding member 81 is also provided between the panel 10 and the bottom surface of the frame member 95 by making the panel 10 concave. It is possible to provide a space for intrusion.
- a bezel is provided so as to cover the through hole 100 formed in the panel 10. May be.
- the bezel is extended from a portion of the housing 60 that constitutes the side surface of the electronic device 1. By covering the through-hole 100 of the panel 10 with the bezel, the through-hole 100 is not exposed to the outside of the electronic device 1 and the aesthetics are not impaired.
- the bottom surface of the frame member 95 is attached to the panel 10 and the piezoelectric element 30 and is disposed between the panel 10 and the piezoelectric element 30.
- the frame member 95 is made of iron, stainless steel, aluminum, or the like, the external force of the bottom surface of the frame member 95 is propagated to the piezoelectric element 30 when an external force is applied to the panel 10. It also serves as a reinforcing plate that reduces the possibility of breakage.
- the piezoelectric element 30 is attached to the bottom surface portion of the frame member 95, but is not limited thereto, and the piezoelectric element 30 may be attached to the wall surface portion of the frame member 95.
- these units naturally have a plate-like member caused by deformation of the piezoelectric element 30 when a surface other than the surface to which the protective member 85 of the piezoelectric element 30 is attached is attached to a predetermined plate-like member.
- the human body vibration sound can be transmitted to the object in contact with the plate member.
- the protective member 85 may have a curved shape in which the surface opposite to the surface attached to the piezoelectric element 30 is convex. Accordingly, it is possible to make it difficult to inhibit the deformation of the piezoelectric element 30 as compared with the case where the protective member 85 has a flat plate shape.
- the piezoelectric element 30 is attached to the bottom portion on the inner side of the frame member composed of the wall surface portion and the bottom surface portion as described above (such a frame member is referred to as a box-shaped member), and is cured inside the box-shaped member.
- a frame member is referred to as a box-shaped member
- the piezoelectric element 30 is fixed in advance inside the frame member 95, the possibility of breakage due to external impact during transportation can be reduced.
- the surface of the bottom of the box-shaped member opposite to the surface to which the piezoelectric element 30 is attached is attached to a predetermined plate-like member, the plate-like member is caused by the deformation of the piezoelectric element 30.
- the human body vibration sound can be transmitted to the object in contact with the plate member.
- the member to which the piezoelectric element 30 is attached does not necessarily have a box shape.
- the piezoelectric element 30 is attached to a predetermined plate-like member (first plate-like member), and the surface of the piezoelectric element 30 opposite to the surface (first main surface) attached to the first plate-like member ( A unit having a configuration in which a predetermined protective member is attached to the second main surface) may be used.
- the predetermined protective member is made of, for example, the above-described elastic member, curable resin, or the like, and can cover the second main surface of the piezoelectric element 30 to mitigate an external impact.
- FIG. 20 is a diagram showing a fourth modification of the third embodiment of the present invention.
- 20A is a rear view of the panel 10 to which the piezoelectric element 30 is attached in the electronic apparatus 1
- FIGS. 20B and 20D are cross-sectional views taken along line XX in FIG. 20A.
- 20 (c) and 20 (e) show cross-sectional views along the line YY in FIG. 20 (a) for each pattern.
- the frame member 95 has a bottom surface portion, a first wall surface portion standing from the surface on the side where the piezoelectric element 30 is attached, and a surface on the side where the piezoelectric element 30 is attached. Has a second wall surface portion erected from the opposite surface.
- the frame member 95 has the second wall surface portion, when the second wall surface portion is attached to the panel 10, a space is generated between the panel 10 and the bottom surface portion of the frame member 95, and the second wall surface portion is formed in the space.
- a curable resin or the like as the two joining member 81 can be filled. Therefore, in the present modification, the first bonding member 71 is provided between the bottom surface portion of the frame member 95 and the panel 10, or the bottom surface portion and the panel can be easily formed without forming a part of the panel 10 in a concave shape. A space between 10 can be formed. As shown in FIG. 20, the first wall surface portion and the second wall surface portion standing on the bottom surface portion of the frame member 95 are flush with each other, that is, integrally form the side surface of the frame member 95. May be.
- a through hole is formed in a part of the bottom surface of the frame member 95, and the curable resin poured into the frame member 95 passes through the through hole. And the space between the bottom surface portion of the frame member 95 and the frame member 95.
- a through hole 100 is formed in the panel 10, and the bottom surface of the panel 10 and the frame member 95 is injected by injecting a curable resin from the through hole 100. The space formed between the portions can be filled with the curable resin.
- the through hole 100 formed in the panel 10 is covered with, for example, a bezel extending from the housing 60.
- FIG. 21 is a diagram showing a fifth modification of the third embodiment of the present invention.
- FIG. 21A is a rear view of the panel 10 to which the piezoelectric element 30 is attached in the electronic apparatus 1
- FIGS. 21B and 21D are cross-sectional views taken along line XX in FIG.
- FIG. 21C and FIG. 21E show cross-sectional views along the YY line in FIG. 21A for each pattern.
- a lid member 91 is attached to the panel 10.
- the lid member 91 includes a wall surface that surrounds the piezoelectric element 30 and an upper surface that extends from the wall surface.
- the piezoelectric element 30 is disposed in a space formed by the panel 10 and the lid member 91. Therefore, the piezoelectric element 30 is protected from an impact generated from the outside by the lid member 91.
- the space formed by the lid member 91 and the panel 10 may be filled with a curable resin or the like as the second bonding member 81.
- a curable resin or the like as the second bonding member 81.
- the FPC 25 is connected to the outside of the lid member 91 from the portion attached to the piezoelectric element 30 through the through hole 100 as shown in FIGS. 21B and 21C (pattern 1). It is extended to. Note that the present invention is not limited to such a configuration. For example, as shown in FIGS. 21D and 21E (pattern 2), a hole for extending the FPC 25 is separately formed in the lid member 91. May be.
- FIG. 22 is a diagram showing the structure of the electronic device 1 according to the fourth embodiment of the present invention.
- 22A is a front view
- FIG. 22B is a cross-sectional view taken along line YY in FIG. 22A.
- the electronic device 1 shown in FIG. 22 is a smartphone in which a touch panel, which is a glass plate, is arranged as a panel 10 on the front surface of a housing 60 (for example, a metal or resin case).
- the panel 10 is attached to the housing 60 by being joined to the housing 60 by the joining member 70.
- the joining member 70 used for attachment of the panel 10 and the housing 60 is, for example, an adhesive or a double-sided tape.
- the display unit 20 is attached to the panel 10 by a joining member 70.
- a joining member 70 suitable for attaching the display unit 20 to the panel 10 for example, there is an optical elastic resin which is a colorless and transparent acrylic ultraviolet curable adhesive.
- the piezoelectric element 30 is attached to the panel 10 via the intermediate member 110.
- the piezoelectric element 30 is attached to the intermediate member 110 by the joining member 70, and the intermediate member 110 is attached to the panel 10 by the joining member 70.
- the attachment of the intermediate member 110 to the panel 10 and the piezoelectric element 30 will be described in detail later.
- the input unit 40 is attached to the housing 60 in the same manner as the panel 10.
- the panel 10, the display part 20, and the piezoelectric element 30 are each substantially rectangular.
- the display unit 20 is disposed approximately at the center of the panel 10 in the short direction.
- the piezoelectric element 30 is provided at a predetermined distance from the end of the panel 10 in the longitudinal direction so that the longitudinal direction of the piezoelectric element 30 is along the short side of the panel 10 in the vicinity of the end.
- the display unit 20 and the piezoelectric element 30 are provided side by side in a direction parallel to the inner surface of the panel 10.
- the electronic device 1 has the above-described configuration, so that 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 that contacts the deformed panel 10. Air conduction sound and vibration sound can be transmitted to objects.
- FIG. 23 is a diagram illustrating an example of vibration of the panel 10 of the electronic device 1 according to the fourth embodiment of the present invention.
- the piezoelectric element 30 is attached to the upper part of the panel 10, and the display unit 20 is attached below the upper part.
- the panel 10 is bent by the piezoelectric element 30 so that the portion directly above the piezoelectric element 30 protrudes higher than the surrounding area in the long side direction 2a of the panel 10.
- the lower part of the panel 10 is less likely to vibrate compared to the upper part of the panel 10 to which the piezoelectric element 30 is attached because the display unit 20 is attached. Therefore, sound leakage due to vibration of the lower portion of the panel 10 at the lower portion of the panel 10 can be reduced.
- the electronic device 1 transmits sound by the vibration of the panel 10.
- the piezoelectric element 30 is attached to the housing 60 and the housing 60 is vibrated, the electronic device is dropped due to the vibration of the housing 60 when the user picks up the electronic device and talks. (Normally, a user makes a call by holding the casing of the electronic device). On the other hand, such a problem hardly occurs in the electronic device 1 that vibrates the panel 10. Of course, when the vibration is not so great, the piezoelectric element 30 may be attached to the housing 60.
- FIG. 24 is a diagram for explaining in detail the structure of the electronic apparatus 1 according to the fourth embodiment of the present invention.
- 24A is a rear view of the panel 10 to which the piezoelectric element 30 is attached in the electronic apparatus 1
- FIGS. 24B and 24D are cross-sectional views taken along line XX in FIG.
- FIGS. 24C and 24E show cross-sectional views along the YY line in FIG. 24A for each pattern.
- FIG. 24A shows a surface of the panel 10 that is visually recognized from the side where the piezoelectric element 30 is disposed (the same applies to the following modifications).
- the piezoelectric element 30 is attached to the panel 10 via the intermediate member 110.
- An FPC (Flexible Printed Circuits) 120 is attached to the surface (second main surface) opposite to the surface (first main surface) attached to the intermediate member 110 in the piezoelectric element 30.
- the terminal portion of the FPC 25 and the electrode terminal portion provided in the piezoelectric element 30 are, for example, a solder material or an anisotropic conductive material in which conductive particles are mixed in an electrically insulating resin (Anisotropic Conductive Paste, or , Anisotropic Conductive Film) and the like are bonded and connected.
- a solder material or an anisotropic conductive material in which conductive particles are mixed in an electrically insulating resin (Anisotropic Conductive Paste, or , Anisotropic Conductive Film) and the like are bonded and connected.
- the FPC 25 is attached to the left end of the second main surface of the piezoelectric element 30, extends from the attached portion, and is electrically connected to the control unit 50 (not shown). The applied electric signal is transmitted to the piezoelectric element 30.
- the arrangement of the FPC 25 is the same, and therefore the description of the FPC 25 is omitted unless otherwise noted.
- the intermediate member 110 is a member that alleviates transmission of external force to the piezoelectric element 30 in order to reduce damage to the piezoelectric element due to external force, for example.
- the material constituting such a member may be, for example, an elastic material such as an organic synthetic rubber represented by polybutadiene, nitrile, or chloroprene, or an inorganic synthetic rubber such as silicone.
- the intermediate member 110 is a member that reduces, for example, excessive deformation of the piezoelectric element 30.
- a copper plate, an iron plate, or a phosphor bronze plate may be used.
- a metal plate or a stainless plate made of aluminum having a certain degree of elasticity may be used.
- the thickness of a metal plate such as a stainless steel plate is suitably 0.2 mm to 0.8 mm, for example, depending on the voltage value applied to the piezoelectric element 30 and the like.
- the intermediate member 110 may be made of a composite of an organic material and an inorganic material (or metal).
- a composite member (reinforced resin) obtained by using a polyamide-based resin as a base material and including glass fiber, metal fiber, carbon fiber, or the like may be used.
- the strength, rigidity, and elasticity are appropriately adjusted according to the amount of glass fiber, metal fiber, carbon fiber, or the like added to the polyamide resin.
- the reinforced resin as described above is formed, for example, by impregnating a resin into a base material formed by braiding glass fiber, metal fiber, carbon fiber, or the like and curing it.
- the reinforced resin may be formed by mixing a fiber piece finely cut into a liquid resin and then curing it.
- the reinforced resin may be a laminate of a base material in which fibers are knitted and a resin layer.
- the piezoelectric element 30 is attached to the intermediate member 110 by the joining member 70, and the intermediate member 110 is attached to the panel 10 by the joining member 70.
- the joining member 70 a plurality of different joining members (first joining member 71 and second joining member 81) are used in combination.
- the second joining member 81 is a member that is more flexible than the first joining member 71.
- the first joining member 71 is the above-described curable resin (for example, epoxy resin as a thermosetting resin)
- the second joining member 81 is a base material made of acrylic or PET (Polyethylene terephthalate). Is a double-sided tape that is formed by coating an adhesive.
- the shape of the base material made of acrylic or PET is a film shape, a nonwoven fabric film shape, a foam shape, or the like, a double-sided tape provided with such a base material is more flexible than a cured resin. Therefore, the second joining member 81 is easier to be deformed following the deformation of the other member joined to the joining member than the first joining member 71, or further reduces the external force transmitted to the other member. Can do.
- the piezoelectric element 30 may be attached to the intermediate member 110 by either the first bonding member 71 or the second bonding member 81.
- the piezoelectric element 30 is attached to the intermediate member 110 by the second bonding member 81.
- the first bonding member 71 is used instead of the second bonding member 81, the intermediate member 110 and the piezoelectric element 30 can be more firmly attached, and therefore the piezoelectric element 30 is peeled off from the intermediate member 110. Can be difficult.
- the intermediate member 110 includes the first joining member 71 in a predetermined region including at least a region immediately below the piezoelectric element 30 in the stacking direction of the panel 10, the intermediate member 110, and the piezoelectric element 30. And is attached to the panel 10 by the second joining member 81 in at least a part of the area around the predetermined area.
- the intermediate member 110 is firmly attached to the panel 10 by the first bonding member 71 in a predetermined region including at least a region immediately below the piezoelectric element 30 in the stacking direction of the panel 10, the intermediate member 110, and the piezoelectric element 30. Further, it is possible to make it difficult for an external impact applied to the panel 10 to be propagated to the piezoelectric element 30 due to the dropping of the electronic device 1 or the like.
- the intermediate member 110 is attached to the panel 10 by the second bonding member 81 that is more flexible than the first bonding member 71 in a partial region around the first bonding member 71,
- the impact transmitted from the periphery of the attachment region to which the member 110 is attached to the attachment region along the main surface of the panel 10 can be mitigated by the second bonding member 81, and thus cracks of the piezoelectric element 30 and the like can be prevented. It can be made difficult to occur.
- FIG 24 shows a configuration in which a double-sided tape as the second joining member 81 is provided in the entire area around the attachment region between the panel 10 and the intermediate member 110.
- a double-sided tape as the second joining member 81 is provided in the entire area around the attachment region between the panel 10 and the intermediate member 110.
- the intermediate member 110 or the piezoelectric element 30
- the impact may propagate from the lower region of the panel 10 to the attachment region. Since it is high, a double-sided tape may be provided only on the lower side of the panel 10 (on the side opposite to the upper end of the panel 10) in the mounting region. Thereby, the impact propagated along the main surface of the panel 10 can be efficiently mitigated by the second bonding member 81.
- the edge region of the surface (first main surface) attached to the panel 10 in the intermediate member 110 is attached to the panel 10 by the double-sided tape as the second joining member 81 with the above configuration. Yes. Therefore, before disposing the curable resin as the first bonding member 71, the edge region on the first main surface of the intermediate member 110 is attached to the panel 10 with double-sided tape in advance, and the panel 10, the intermediate member 110, and both surfaces are attached. By forming a space between the tape and the tape, the space can be filled with a curable resin as the second bonding member 81. That is, by disposing a double-sided tape between the panel 10 and the intermediate member 110, a passage route for the curable resin can be formed.
- the panel 10 and the intermediate member 110 are attached in advance by the second bonding member 81, and the space between the panel 10 and the intermediate member 110 is held, so that the curable resin has a sufficient thickness in the space.
- the resin can be cured in a state, and as a result, the panel 10 and the intermediate member 110 can be attached more firmly.
- FIG. 24B pattern 1
- the through hole 100 is formed in a part of the intermediate member 110 or in a part of the panel 10 as shown in FIG. 24D (pattern 2).
- the curable resin as the second bonding member 81 can be filled from the through hole 100.
- the through hole 100 is a first hole communicating from the space formed between the panel 10, the intermediate member 110, and the double-sided tape to the outside of the space.
- a bezel may be provided so as to cover the through hole 100 formed in the panel 10.
- the bezel is extended from a portion of the housing 60 that constitutes the side surface of the electronic device 1.
- a second hole different from the through hole 100 as the first hole may be formed in the intermediate member 110 or the panel 10.
- the adhesive can be filled into the space between the panel 10 and the intermediate member 110 from the first hole, and the gas existing in the space can be exhausted out of the space from the second hole.
- the 1st hole and the 2nd hole showed the structure formed in the intermediate member 110 or the panel 10, it does not necessarily need to be such a structure, A 1st hole and a 2nd hole You may provide at least one by making a notch partly form in the double-sided tape which attaches the intermediate member 110 and the panel 10.
- FIG. 1st hole and the 2nd hole showed the structure formed in the intermediate member 110 or the panel 10, it does not necessarily need to be such a structure, A 1st hole and a 2nd hole You may provide at least one by making a notch partly form in the double-sided tape which attaches the intermediate member 110 and the panel 10.
- a double-sided tape as the second bonding member 81 is attached to both edge portions along the longitudinal direction on the first main surface of the intermediate member 110, By being configured not to be attached to both ends in the short direction, a substantially rectangular space is formed between the panel 10 and the intermediate member 110, and a first hole is formed at one end in the longitudinal direction of the space. The second hole may be formed at the other end in the longitudinal direction of the space.
- FIG. 25 is a diagram showing a first modification of the fourth embodiment of the present invention.
- 25A is a rear view of the panel 10 to which the intermediate member 110 and the piezoelectric element 30 are attached in the electronic apparatus 1
- FIGS. 25B and 25D are taken along line XX in FIG. 25C and 25E show the cross-sectional view along the YY line in FIG. 25A for each pattern.
- this modification a configuration in which a curable resin as the protective member 85 is coated on a surface (second main surface) opposite to a surface (first main surface) attached to the intermediate member 110 in the piezoelectric element 30. It is shown. Therefore, in FIG.
- the protection member 85 may be configured to be attached to the piezoelectric element 30 so as to avoid the area where the FPC 25 is attached on the second main surface of the piezoelectric element 30 (the same applies to the following modifications). Is).
- a protective member 85 is attached to the second main surface of the piezoelectric element 30. Therefore, for example, the piezoelectric element 30 and other members disposed in the vicinity of the piezoelectric element 30 due to an impact caused by dropping of the electronic device 1 or the like (for example, a corner or an electronic component protruding inside the housing 60). Can be prevented from being damaged by the protection member 85 mitigating the impact caused by the contact.
- the protective member 85 may have a curved shape in which the surface of the protective member 85 opposite to the surface attached to the piezoelectric element 30 is convex. For example, as shown in FIG. 25B, when the protective member 85 has a convex curved shape in the cross section along the YY line, the protective member 85 has a planar shape and a convex shape. It has been empirically found that the piezoelectric element 30 is easily deformed as the piezoelectric element 30 is deflected as compared with the case where the thickness of the protective member is the same as that of the thickest portion.
- the protective member 85 has a convex curved shape, it is difficult to inhibit the deformation of the piezoelectric element 30 as compared with the case where the protective member 85 has a planar shape, and therefore the sound pressure is reduced. While reducing, damage to the piezoelectric element 30 due to external force can be reduced.
- an organic or inorganic synthetic rubber is provided with a planar shape portion for attaching to the piezoelectric element 30 and a curved shape portion facing the planar shape portion.
- the protective member may be processed and attached to the piezoelectric element 30, or the above-described curable resin may be applied or dropped onto the surface of the piezoelectric element 30 opposite to the surface to be attached to the panel 10 and cured. 85 may be formed.
- the curable resin has a certain degree of viscosity at room temperature even before being cured, and when applied or dropped onto the piezoelectric element 30, the curable resin has a curved shape due to the surface tension of the curable resin. It can be formed and cured with the curved shape.
- the protection member 85 covers the 2nd main surface of the piezoelectric element 30, possibility of the damage of the piezoelectric element 30 can be reduced, However, It is not limited to such a structure,
- the protection member 85 is a piezoelectric element.
- the side surface extending from the surface may be covered. With such a configuration, the protective member 85 can relieve even an impact on the side surface of the piezoelectric element 30.
- the protective member 85 is a curable resin and is the same as the curable resin as the panel 10 and the first bonding member 71
- the protective member 85 and the first bonding member 71 may be provided integrally. good. That is, as shown in FIGS. 25B and 25D, after filling the space between the panel 10 and the intermediate member 110 through the through hole 100 formed in the intermediate member 110 with the curable resin, The protective member 85 is formed by dropping and curing a curable resin so as to cover the upper surface of the member 110 and the upper surface (second main surface) of the piezoelectric element 30.
- the area of the surface of the intermediate member 110 attached to the piezoelectric element 30 is larger than the area of the first main surface of the piezoelectric element 30.
- the intermediate member 110 has a surface larger than the first main surface of the piezoelectric element 30 in the XX direction and the YY direction, and a curable resin as the protective member 85 is covered so as to cover the surface. By dripping, the surfaces other than the first main surface of the piezoelectric element 30 can be covered with resin. At this time, since the intermediate member 110 having a surface larger than the first main surface of the piezoelectric element 30 is disposed between the piezoelectric element 30 and the panel 10, the dripping curable resin adheres to the panel 10. The risk of doing so can be reduced.
- the surface (first main surface) attached to the panel 10 in the intermediate member 110 has one or more of them. Grooves are formed. By forming the groove in the intermediate member 110, the area where the curable resin as the first bonding member 71 and the intermediate member 110 are bonded can be increased, and the curable resin and the intermediate member 110 are further strengthened. Can be joined. In addition, you may form a groove
- FIG. 26 is a diagram showing a second modification of the fourth embodiment of the present invention.
- 26A is a rear view of the panel 10 to which the intermediate member 110 and the piezoelectric element 30 are attached in the electronic apparatus 1
- FIG. 26B is a cross-sectional view taken along line XX in FIG.
- FIG. 26C is a cross-sectional view taken along line YY in FIG.
- the intermediate member 110 has a bottom surface portion to which the piezoelectric element 30 is attached and a wall surface portion erected from the bottom surface portion.
- the curable resin as the protective member 85 can be poured into the box-shaped internal space composed of the bottom surface portion and the wall surface portion of the intermediate member 110.
- the curable resin as the protective member 85 can be covered with the curable resin. . (That is, substantially the entire piezoelectric element 30 is covered with resin). Therefore, the propagation of impact to the piezoelectric element 30 due to external force can be further mitigated by the curable resin as the protective member 85.
- the possibility that the piezoelectric element 30 is detached from the intermediate member 110 when an impact is applied from the outside can be reduced.
- the intermediate member 110 has a substantially box-like shape including a bottom surface portion and a wall surface portion, the piezoelectric element 30 is covered with the resin by pouring a curable resin. Can be easily realized.
- the piezoelectric element 30 is attached to the intermediate member 110 by a first bonding member 71 and a second bonding member 81.
- the piezoelectric element 30 has an edge region on the first main surface of the piezoelectric element 30 attached to the intermediate member 110 by a second bonding member 81 (for example, a double-sided tape).
- the second bonding member 81 is not attached to the entire area of the edge of the first main surface of the piezoelectric element 30.
- the notch is partially provided in the double-sided tape for attaching the intermediate member 110 and the piezoelectric element 30.
- the second joining member 81 (double-sided tape) is not provided (notched) at a part of the left end in the XX direction on the first main surface of the piezoelectric element 30. )
- the portion where the second bonding member 81 is not disposed serves as a passage route for the curable resin as the first bonding member 71.
- the curable resin as the first bonding member 71 is poured into the substantially box-shaped interior of the intermediate member 110 in a state where the piezoelectric element 30 is attached to the intermediate member 110 by the second bonding member 81 in advance.
- the curable resin can enter the space, and the resin can be cured with a sufficient thickness.
- the piezoelectric element 30 and the intermediate member 110 can be more firmly attached.
- the piezoelectric element 30 is attached to the intermediate member 110 by the first joining member 71 and the second joining member 81.
- the piezoelectric element 30 may be attached to the intermediate member 110 by only one of the first bonding member 71 and the second bonding member 81.
- the entire first main surface of the piezoelectric element 30 may be attached to the intermediate member 110 with a double-sided tape as the second bonding member 81.
- the configuration in which the region where the second bonding member 81 is not provided is provided in a part of the edge region on the first main surface of the piezoelectric element 30 is not limited thereto.
- the second joining member 81 may be attached to the entire region of the edge of the first main surface of the piezoelectric element 30 (that is, the region to which the second joining member 81 is attached may form a closed region).
- regions other than the edge region on the first main surface of the piezoelectric element 30 are not joined to the panel 10 via the joining member. Therefore, the region other than the edge region on the first main surface of the piezoelectric element 30 is a region where deformation of the piezoelectric element 30 is not hindered by the bonding member.
- the inhibition of deformation of the piezoelectric element 30 is reduced.
- the sound pressure characteristics of the electronic device 1 can be improved.
- the through hole 100 may be formed in a part (bottom surface portion) of the intermediate member 110.
- a single member or a unit in which several members are combined in advance is transported.
- a unit is obtained by attaching the piezoelectric element 30 to a predetermined plate-like member (first plate-like member).
- a first joining member for example, a curable resin
- a predetermined region including at least a region immediately below the piezoelectric element 30 in the stacking direction of the piezoelectric element 30 and the first plate-like member.
- a second joining member for example, double-sided tape
- the impact applied to the first plate-like member from the outside during propagation is propagated to the piezoelectric element 30 along the first plate-like member, the impact is applied to the second joining member.
- a surface of the first plate member opposite to the surface to which the piezoelectric element 30 is attached is a predetermined plate member (second plate) different from the first plate member.
- the protective member 85 may be attached to the surface of the piezoelectric element 30 opposite to the surface attached to the panel 10. Further, the protective member 85 may have a curved shape with a convex surface on the opposite side to the surface of the protective member 85 attached to the piezoelectric element 30.
- the member to which the piezoelectric element 30 is attached is not necessarily a plate-like member.
- the piezoelectric element 30 may be attached to the bottom surface of a predetermined box-shaped member.
- a unit in which the piezoelectric element 30 is fixed in the box-shaped member in advance by pouring a curable resin into the box-shaped member there is a possibility of damage due to an external impact during transportation. It can be further reduced.
- impact from the outside during transportation can be reduced by the curable resin.
- curable resin as the 1st joining member 71 is obtained by interposing the 2nd joining member 81 between the plane part of the intermediate member 110, and the panel 10 until now.
- a space for filling can be formed, the means for forming the space is not limited to this.
- FIG. 27 is a diagram showing a third modification of the fourth embodiment of the present invention.
- 27A is a rear view of the panel 10 to which the intermediate member 110 and the piezoelectric element 30 are attached in the electronic apparatus 1
- FIG. 27B is a cross-sectional view taken along line XX in FIG. 27A
- FIG. 27C is a cross-sectional view taken along line YY in FIG.
- a concave intermediate member 110 is used, and the opening surface of the intermediate member 110 is attached to the panel 10 by a second joining member 81.
- the panel 10 may be joined to the housing 60 by a joining member 70.
- the joining member 70 can be a non-heating type curable adhesive. Accordingly, there is an advantage that thermal stress shrinkage hardly occurs between the housing 60 and the panel 10 at the time of curing.
- the joining member 70 can be a double-sided tape. Thereby, there exists an advantage that the shrinkage stress like the time of use of an adhesive agent does not generate
- the piezoelectric element 30 may be disposed at the center of the panel 10.
- the vibration of the piezoelectric element 30 is evenly transmitted to the entire panel 10 to improve the quality of the air conduction sound, and the user can listen to various positions of the panel 10.
- the human body vibration sound can be recognized even if it is touched.
- a plurality of piezoelectric elements 30 may be mounted.
- the piezoelectric element 30 is attached to the panel 10, but may be attached to a location different from the panel 10.
- the piezoelectric element 30 may be attached to a battery lid that is attached to the housing 60 and covers 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 mobile phone, according to such a configuration, the user places a part of the body (for example, an ear) on the surface different from the panel 10. You can hear the sound by touching.
- the panel 10 can constitute a part or all of any of a display panel, an operation panel, a cover panel, and a lid panel for making the rechargeable battery removable.
- the piezoelectric element 30 is disposed outside the display area for the display function.
- the piezoelectric element 30 has an advantage that it is difficult to inhibit display.
- the operation panel includes the touch panel of the first embodiment.
- the operation panel includes a sheet key that is a member that constitutes one surface of the operation unit side body, in which, for example, a key top of an operation key is integrally formed in a foldable mobile phone.
- the bonding member that bonds the panel 10 and the piezoelectric element 30, the bonding member that bonds the panel 10 and the housing 60, and the like have the same reference numerals.
- the joining members used in the first embodiment and the second embodiment may be appropriately different depending on the members to be joined.
- a double-sided tape or an adhesive is illustrated, but these may be used in combination instead of being used alone.
- a double-sided tape may be applied to the housing 60, and an adhesive having a higher adhesive strength than the double-sided tape may be applied thereon to bond the panel 10.
- the double-sided tape and the adhesive are firmly bonded to each other, and as a result, the panel 10 and the housing 60 can be firmly bonded.
- the adhesive used here is, for example, a non-heating type curable adhesive, or a moisture curable elastic adhesive that cures by reacting with moisture (humidity) in the air.
- the moisture-curing elastic adhesive has, for example, a special polymer containing a silyl group as a main component.
- the member that generates sound is not limited to the panel 10. If it is the member which comprises the electronic device 1 and has a substantially flat plate shape in part, a sound can be generated.
- a sound can be generated.
- a member include a case member constituting the casing of the electronic device 1 or a battery cover made of polycarbonate and detachably attached to the case member.
- the piezoelectric element 30 is attached to the bottom surface of the case member. At this time, the bottom surface of the case member vibrates due to the displacement of the piezoelectric element 30 to generate sound.
- a mobile phone in which the operation unit side body and the display unit side body are connected in a foldable manner may be used.
- a sliding type in which one casing is slid in one direction from the state in which the operation section side casing and the display section side casing overlap each other, or between the operation section side casing and the display section side casing
- a rotating (turn) type in which one housing is rotated around an axis along the overlapping direction, and the operation unit side housing and the display unit side housing are arranged in one housing and have a connecting part.
- the type that does not (straight type) may be used.
- the mobile phone may be a so-called biaxial hinge type that can be opened and closed and rotated.
- an electronic apparatus and a unit are disclosed as having various functional units that execute specific functions. It should be noted that these functional units are schematically shown in order to briefly explain the functionality, and do not necessarily indicate specific hardware and software. In that sense, these functional units and other components may be hardware and software implemented so as to substantially execute the specific functions described herein. The various functions of the different components may be any combination or separation of hardware and software, each used separately or in any combination. Thus, the various aspects of the present disclosure can be implemented in many different ways, all of which are within the scope of the present disclosure.
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Abstract
Description
ことができる。
図3は第1の実施形態に係る電子機器1の実装構造を示す図である。図3(a)は正面図、図3(b)は図3(a)におけるb-b線に沿った断面図である。図3に示す電子機器1は、ガラス板であるタッチパネルが筐体60(例えば金属や樹脂のケース)の前面にパネル10として配されたスマートフォンである。パネル10及び入力部40は筐体60に支持され、表示部20および圧電素子30は、それぞれ接合部材70によりパネル10に接着されている。接合部材70は、熱硬化性あるいは紫外線硬化性等を有する接着剤や両面テープ等であり、例えば無色透明のアクリル系紫外線硬化型接着剤である光学弾性樹脂でもよい。パネル10、表示部20および圧電素子30は、それぞれ略長方形状である。
図13は第2の実施形態に係る電子機器1の実装構造を示す図である。図13(a)は正面図、図13(b)は図13(a)におけるb-b線に沿った断面図、図13(c)は図13(a)におけるc-c線に沿った断面図である。図13に示す電子機器1はパネル10として表示部20を保護するカバーパネル(アクリル板)が上側の筐体60の前面に配された折りたたみ式の携帯電話である。第2の実施形態では、パネル10と圧電素子30との間には、補強部材80が配置される。補強部材80は、例えば樹脂製の板、板金またはガラス繊維を含む樹脂製の板である。すなわち、第2の実施形態に係る電子機器1は、圧電素子30と補強部材80とが接合部材70により接着され、さらに補強部材80とパネル10とが接合部材70により接着される構造である。また、第2の実施形態では、表示部20は、パネル10に接着されるのではなく、筐体60によって支持されている。すなわち、第2の実施形態に係る電子機器1は、表示部20がパネル10と離間しており、表示部20と筐体60の一部である支持部90とが接合部材70により接着される構造である。なお、支持部90は、筐体60の一部としての構成に限定されず、金属や樹脂等により筐体60から独立した部材として構成することが可能である。
図15は、本発明の第3の実施形態に係る電子機器1の構造を示す図である。図15(a)は正面図、図15(b)は図15(a)におけるY-Y線に沿った断面図である。図15に示す電子機器1はパネル10としてガラス板であるタッチパネルが筐体60(例えば金属や樹脂のケース)の前面に配されたスマートフォンである。パネル10は、接合部材70により筐体60に接合されることで、該筐体60に取り付けられている。ここで、接合部材70は、例えば、接着剤や両面テープである。また、表示部20及び圧電素子30は、接合部材70によりパネル10に接合されて、取り付けられている。パネル10への表示部20の取り付けに好適な接合部材70としては、例えば、無色透明のアクリル系紫外線硬化型接着剤である光学弾性樹脂がある。また、パネル10への圧電素子30の取り付けに好適な接合部材70としては、例えば、防水性を有した両面テープや熱硬化性あるいは紫外線硬化性等を有する接着剤がある。入力部40は、パネル10と同様にして、筐体60に取り付けられている。ここで、パネル10、表示部20および圧電素子30は、それぞれ略長方形状である。
図22は、本発明の第4の実施形態に係る電子機器1の構造を示す図である。図22(a)は正面図、図22(b)は図22(a)におけるY-Y線に沿った断面図である。図22に示す電子機器1はパネル10としてガラス板であるタッチパネルが筐体60(例えば金属や樹脂のケース)の前面に配されたスマートフォンである。パネル10は、接合部材70により筐体60に接合されることで、該筐体60に取り付けられている。パネル10と筺体60との取付けに使用される接合部材70は、例えば、接着剤や両面テープである。また、表示部20は、接合部材70によりパネル10に接合されて、取り付けられている。パネル10への表示部20の取り付けに好適な接合部材70としては、例えば、無色透明のアクリル系紫外線硬化型接着剤である光学弾性樹脂がある。また、圧電素子30は、中間部材110を介してパネル10に取り付けられている。圧電素子30は、接合部材70によって中間部材110に取付けられ、中間部材110は接合部材70によってパネル10に取付けられている。尚、中間部材110とパネル10及び圧電素子30との取付けに関しては後に詳述する。入力部40は、パネル10と同様にして、筐体60に取り付けられている。ここで、パネル10、表示部20および圧電素子30は、それぞれ略長方形状である。
尚、図24(b)(パターン1)に示すように、中間部材110の一部に、又は、図24(d)(パターン2)に示すように、パネル10の一部に、貫通孔100を形成させることによって、貫通孔100から第2接合部材81としての硬化性樹脂を充填可能とする。貫通孔100は、即ち、パネル10と中間部材110と両面テープとの間に形成される空間から空間外へと連通する第1の孔である。尚、図24(d)、(e)(パターン2)に示す構成においては、パネル10に形成された貫通孔100を覆うように、ベゼルが設けられていても良い。ベゼルは、例えば、筐体60における電子機器1の側面を構成する部分から延設されている。ベゼルにより、パネル10の貫通孔100が覆われることで、貫通孔100が電子機器1の外部に露出することがなくなり、美観性を損ねることがない。
10 パネル
20 表示部
25 FPC
30 圧電素子
30a 第1主面
30b プラス側電極端子
30c マイナス側電極端子
30d 第2主面
40 入力部
50 制御部
55 電子部品
60 筐体
70 接合部材
71 第1接合部材
80 補強部材
81 第2接合部材
85 保護部材
90 支持部
91 蓋部材
95 枠部材
100 貫通孔
110 中間部材
Claims (35)
- パネルと、
前記パネルに取り付けられる圧電素子と、
前記圧電素子の主面に取り付けられる基板と、を備え、
前記圧電素子により変形するパネルに接触している人体の接触部位が振動して音を伝えるユニットであって、
前記基板は、樹脂から成る基材と、当該基材に積層配置されて前記圧電素子の前記主面に接続される信号線を有し、
前記圧電素子の前記主面は、略全体が前記基材により覆われている
ユニット。 - 前記圧電素子は、第1主面及び当該第1主面と反対側の第2主面を有し、前記第1主面には、前記基板が取り付けられ、前記第2主面は、前記パネルに取り付けられる
請求項1に記載のユニット。 - 前記基板は、前記パネルと前記圧電素子との間に配設される
請求項1に記載のユニット。 - 前記圧電素子は、前記第1主面の当該圧電素子の長手方向における一端部にプラス側電極端子が設けられると共に、前記第1主面の該長手方向における他端部にマイナス側電極端子が設けられ、
前記基板は、前記プラス側電極端子と電気的に接続される第1の信号線及び前記マイナス側電極端子と電気的に接続される第2の信号線を有する
請求項2に記載のユニット。 - 前記基板は、前記圧電素子の前記長手方向における端部から延設される延設部を有し、
前記延設部には、前記圧電素子と異なる電子部品が接続される
請求項1乃至請求項4のいずれか一項に記載のユニット。 - 請求項1乃至請求項5のいずれか一項に記載のユニットを少なくとも備えた
電子機器。 - 筺体と、
前記筐体に取り付けられるパネルと、
前記パネルに取り付けられる圧電素子と、を備え、
前記圧電素子の変形に起因して、前記パネルが変形し、該パネルに接触する対象物に人体振動音を伝える電子機器であって、
前記圧電素子における、前記パネルに取り付けられた面とは反対側の面に取り付けられる保護部材をさらに備え、
前記保護部材は、該保護部材における前記圧電素子に取り付けられる面とは反対側の面が凸状の湾曲形状である
ことを特徴とする電子機器。 - 前記保護部材は、前記圧電素子における、該保護部材が取り付けられる面と、該面から延設される側面と、を覆う
ことを特徴とする請求項7に記載の電子機器。 - 筺体と、
圧電素子と、
前記筐体に取り付けられるパネルと、
前記パネルと前記圧電素子との間に配設される中間部材と、を備え、
前記圧電素子の変形に起因して、前記パネルが変形し、該パネルに接触する対象物に人体振動音を伝える電子機器であって、
前記圧電素子は、前記中間部材に取り付けられ、
前記圧電素子における、前記中間部材に取り付けられた面とは反対側の面に取り付けられる保護部材をさらに備え、
前記保護部材は、該保護部材における前記圧電素子に取り付けられる面とは反対側の面が凸状の湾曲形状である
ことを特徴とする電子機器。 - 前記保護部材は、前記圧電素子における、該保護部材が取り付けられる面と、該面から延設される側面と、を覆う
ことを特徴とする請求項9に記載の電子機器。 - 前記中間部材における前記圧電素子が取り付けられる面の領域が、該圧電素子における該中間部材に取り付けられる面の領域よりも大きい
ことを特徴とする請求項10に記載の電子機器。 - 前記中間部材は、接合部材により前記パネル及び前記圧電素子に取り付けられ、
前記中間部材における、前記パネルあるいは前記圧電素子が取り付けられる面には溝が形成されている
ことを特徴とする請求項9に記載の電子機器。 - 筺体と、
前記筐体に取り付けられるパネルと、
前記パネルに取り付けられる圧電素子と、を備え、
前記圧電素子の変形に起因して、前記パネルが変形し、該パネルに接触する対象物に人体振動音を伝える電子機器であって、
前記圧電素子を囲う壁面部と、該壁面部から延設される上面部と、から構成される蓋部材をさらに備え、
前記蓋部材は、前記パネルに取り付けられ、
前記圧電素子は、前記パネルと前記蓋部材とにより形成される空間内に配設される
ことを特徴とする電子機器。 - 前記空間には硬化性樹脂が充填されている
ことを特徴とする請求項13に記載の電子機器。 - 筺体と、
前記筐体に取り付けられるパネルと、
前記パネルに取り付けられる圧電素子と、
前記圧電素子の周囲を囲う枠部材と、を備え、
前記圧電素子の変形に起因して、前記パネルが変形し、該パネルに接触する対象物に人体振動音を伝える電子機器の製造方法であって、
前記枠部材を前記パネルに取り付け、該パネルと該枠部材の内壁面とからなる略箱状の型に硬化性樹脂を流し込み、硬化させることによって、前記圧電素子における前記パネルに取り付けられている面と反対側の面を該樹脂で被覆させる
ことを特徴とする電子機器の製造方法。 - 筺体と、
前記筐体に取り付けられるパネルと、
圧電素子を囲う壁面部と、該壁面部から延設される底面部と、から構成される枠部材と、
前記枠部材に取り付けられる圧電素子と、を備え、
前記圧電素子の変形に起因して、前記パネルが変形し、該パネルに接触する対象物に人体振動音を伝える電子機器の製造方法であって、
前記枠部材の前記壁面部と前記底面部とからなる略箱状の型に硬化性樹脂を流し込み、硬化させることによって、前記圧電素子における前記枠部材に取り付けられている面と反対側の面を該樹脂で被覆させる
ことを特徴とする電子機器の製造方法。 - 前記底面部の縁領域が第1接合部材により前記パネルに取り付けられ、
前記底面部の少なくとも一部には貫通孔が形成され、該貫通孔を介して、前記硬化性樹脂が前記パネルと前記底面部との間の空間に充填される
ことを特徴とする請求項16に記載の電子機器の製造方法。 - 圧電素子と、
前記圧電素子の所定の面に取り付けられる保護部材と、を備え、
前記圧電素子における、前記所定の面以外の面を所定の板状部材に取り付けたときに、前記圧電素子の変形に起因して、該板状部材を変形させ、該板状部材に接触する対象物に人体振動音を伝えるユニットであって、
前記保護部材は、該保護部材における前記圧電素子に取り付けられる面とは反対側の面が凸状の湾曲形状である
ことを特徴とするユニット。 - 第1板状部材と、
前記第1板状部材に取り付けられる圧電素子と、を備え、
前記第1板状部材における、前記圧電素子が取り付けられた面とは反対側の面を、該第1板状部材と異なる第2板状部材に取り付けたときに、前記圧電素子の変形に起因して、該第2板状部材を変形させ、該第2板状部材に接触する対象物に人体振動音を伝えるユニットであって、
前記圧電素子における、前記第1板状部材に取り付けられた面とは反対側の面に取り付けられる保護部材をさらに備え、
前記保護部材は、該保護部材における前記圧電素子に取り付けられる面とは反対側の面が凸状の湾曲形状である
ことを特徴とするユニット。 - 箱状部材と、
前記箱状部材の内部側の底面部に取り付けられる圧電素子と、を備え、
前記箱状部材の底部における、前記圧電素子が取り付けられた面とは反対側の面を所定の板状部材に取り付けたときに、前記圧電素子の変形に起因して、該板状部材を変形させ、該板状部材に接触する対象物に人体振動音を伝えるユニットであって、
前記箱状部材の内部に硬化性樹脂を流し込み、硬化させることによって、前記圧電素子の少なくとも一部を該樹脂が覆う
ことを特徴とするユニット。 - パネルと、
圧電素子と、
前記パネルが取り付けられる筐体と、
前記パネル及び前記圧電素子に取り付けられ、該圧電素子と該パネルとの間に配置される中間部材と、を備え、
前記圧電素子の変形に起因して、前記パネルが変形し、該パネルに接触する対象物に人体振動音を伝える電子機器であって、
前記中間部材は、前記パネルと前記中間部材と前記圧電素子との積層方向における該圧電素子の直下の領域を少なくとも含む所定の領域において第1接合部材により前記パネルに取り付けられ、該所定の領域の周囲の少なくとも一部の領域において、該第1接合部材よりも柔軟な第2接合部材により前記パネルに取り付けられている
ことを特徴とする電子機器。 - 前記中間部材は、前記パネルの一端側に取り付けられ、
前記第2接合部材は、前記中間部材と前記パネルとが取り付けられる領域における、前記パネルの一端と反対側に配置される
こと特徴とする請求項21に記載の電子機器。 - 前記第1接合部材は、硬化性樹脂である
ことを特徴とする請求項21又は請求項22に記載の電子機器。 - 前記第2接合部材は、両面テープである
ことを特徴とする請求項21乃至請求項23のいずれか一項に記載の電子機器。 - 前記圧電素子における、前記中間部材に取り付けられた面とは反対側の面に取り付けられる保護部材をさらに備え、
前記保護部材は、該保護部材における前記圧電素子に取り付けられる面とは反対側の面が凸状の湾曲形状である
ことを特徴とする請求項21乃至請求項24のいずれか一項に記載の電子機器。 - 前記保護部材は、前記圧電素子における、該保護部材が取り付けられる面と、該面から延設される側面と、を覆う
ことを特徴とする請求項25に記載の電子機器。 - 前記中間部材における、前記パネルあるいは前記圧電素子が取り付けられる面には溝が形成されている
ことを特徴とする請求項21乃至請求項26のいずれか一項に記載の電子機器。 - パネルと、
圧電素子と、
前記パネルが取り付けられる筐体と、
前記パネル及び前記圧電素子に取り付けられ、該圧電素子と該パネルとの間に配置される中間部材と、
前記パネルに前記中間部材を取付けるための接合部材と、を備え、
前記圧電素子の変形に起因して、前記パネルが変形し、該パネルに接触する対象物に人体振動音を伝える電子機器の製造方法であって、
前記パネルと前記中間部材と前記接合部材との間に空間が形成され、
前記空間には、該空間から空間外へと連通する第1の孔が形成され、
前記第1の孔から前記空間へ硬化性樹脂を充填する
ことを特徴とする電子機器の製造方法。 - 前記空間は、該空間から空間外へと連通する、前記第1の孔と異なる第2の孔が形成され、
前記第1の孔から前記空間へ接着剤を充填すると共に、該空間に存在する気体を前記第2の孔から前記空間外へ排気する
ことを特徴とする請求項28に記載の電子機器の製造方法。 - 前記圧電素子は、長方形状であり、
前記接合部材は、前記圧電素子の所定の面における、長手方向に沿った両縁部に取り付けられ、
前記空間は、略長方形状を有し、
前記第1の孔は、前記空間の長手方向における一端に形成され、
前記第2の孔は、前記空間の長手方向における前記一端とは反対側の他端に形成される
ことを特徴とする請求項29に記載の電子機器の製造方法。 - 前記中間部材は、前記圧電素子が取り付けられる底面部と、該底面部から立設される壁面部とを有し、
前記底面部と前記壁面部とからなる箱状の内部空間に硬化性樹脂を流し込み、硬化させることによって、前記圧電素子における前記中間部材に取り付けられている面と反対側の面を該樹脂で被覆させる
ことを特徴とする請求項28に記載の電子機器の製造方法。 - 第1板状部材と、
前記第1板状部材に取り付けられる圧電素子と、を備え、
前記第1板状部材における、前記圧電素子が取り付けられた面とは反対側の面を、該第1板状部材と異なる第2板状部材に取り付けたときに、前記圧電素子の変形に起因して、該第2板状部材を変形させ、該第2板状部材に接触する対象物に人体振動音を伝えるユニットであって、
前記圧電素子は、当該圧電素子と前記第1板状部材との積層方向における該圧電素子の直下の領域を少なくとも含む所定の領域において第1接合部材により前記第1板状部材に取り付けられ、該所定の領域の周囲の少なくとも一部の領域において、該第1接合部材よりも柔軟な第2接合部材により前記第1板状部材に取り付けられている
ことを特徴とするユニット。 - 箱状部材と、
前記箱状部材の内部側の底面部に取り付けられる圧電素子と、を備え、
前記箱状部材の底部における、前記圧電素子が取り付けられた面とは反対側の面を所定の板状部材に取り付けたときに、前記圧電素子の変形に起因して、該板状部材を変形させ、該板状部材に接触する対象物に人体振動音を伝えるユニットであって、
前記圧電素子は、当該圧電素子と前記箱状部材の前記底面部との積層方向における該圧電素子の直下の領域を少なくとも含む所定の領域において第1接合部材により前記箱状部材に取り付けられ、該所定の領域の周囲の少なくとも一部の領域において、該第1接合部材よりも柔軟な第2接合部材により前記箱状部材に取り付けられている
ことを特徴とするユニット。 - 前記圧電素子における、パネルに取り付けられた面とは反対側の面に取り付けられる保護部材をさらに備え、
ことを特徴とする請求項32又は請求項33に記載のユニット。 - 前記保護部材は、該保護部材における前記圧電素子に取り付けられる面とは反対側の面が凸状の湾曲形状である
ことを特徴とする請求項34に記載のユニット。
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Also Published As
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JP6430377B2 (ja) | 2018-11-28 |
US9774958B2 (en) | 2017-09-26 |
US20160127836A1 (en) | 2016-05-05 |
JPWO2014192301A1 (ja) | 2017-02-23 |
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