JP5951355B2 - Electronics - Google Patents

Description

  The present invention relates to an electronic device that vibrates a panel by applying a predetermined electrical signal (audio signal) to a piezoelectric element, and transmits air conduction sound and vibration sound to a user by transmitting the vibration of the panel to a human body. About.

  Patent Document 1 describes an electronic device such as a mobile phone that transmits air conduction sound and bone conduction sound to a user. According to Patent Document 1, 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. Have been described. Patent Document 1 describes that bone conduction sound is 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. ing.

  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.

JP 2005-348193 A

  In the electronic device described in Patent Document 1, a vibrating body is attached to the outer surface of a housing such as a mobile phone. For this reason, no consideration has been given to problems when the panel attached to the housing is vibrated.

  An object of the present invention is to provide an electronic device of a type that vibrates a panel attached to a housing, which can be suitably used.

An electronic apparatus according to the present invention includes a long piezoelectric element, a panel to which the piezoelectric element is fixed, a casing that supports the panel, a duct that communicates from the surface of the casing to the inside, and an interior thereof. a sound collector and a microphone disposed, was perforated, the panel, as directly above the piezoelectric element in the longitudinal direction of the piezoelectric element is the highest raised relative to its surroundings, by the piezoelectric element The panel is bent, and a contact area of an ear that contacts the panel vibrates and transmits sound .

  The sound collection unit may have an opening of the duct in a region other than the panel on the surface of the housing. The sound collection unit may have an opening of the duct on a surface intersecting the panel on the surface of the housing.

  The housing may include a first member that supports the panel and a second member that is different from the first member to which the sound collection unit is attached.

  The sound collection unit may be disposed on a second side opposite to the first side on which the piezoelectric element is disposed in a plan view of the housing.

  The length in the direction from the side where the piezoelectric element is arranged to the opposite side in a plan view of the panel is preferably equal to or longer than the length from the antitragus to the lower leg of the antiaural ring. Moreover, the length of the direction which cross | intersects the said direction is good in it being more than the length from a tragus to an antiaural ring.

  The piezoelectric element may be bonded to the panel by a bonding member. Furthermore, the joining member may be a non-heating type curable adhesive or a double-sided tape.

  The panel may be bonded to the housing by a bonding member. Furthermore, the joining member may be a non-heating type curable adhesive or a double-sided tape.

  The panel may include a display unit disposed closer to the microphone from a fixed position of the piezoelectric element in a plan view.

  The panel may constitute part or all of any one of a display unit, an input unit, and a cover of the display unit.

  The joining portion of the piezoelectric element in the panel may be located outside an overlapping region between the panel and the display unit.

  The panel may constitute part or all of any one of a display unit, an input unit, and a cover of the display unit.

  ADVANTAGE OF THE INVENTION According to this invention, the electronic device of the type which vibrates the panel attached to a housing | casing which can be used conveniently can be provided.

It is a figure which shows the functional block of the electronic device which concerns on one Embodiment of this invention. It is a figure which shows the suitable shape of a panel. It is a figure which shows the mounting structure of the electronic device which concerns on 1st Embodiment. It is a figure which shows an example of the vibration of the panel of the electronic device which concerns on 1st Embodiment. It is a figure which shows the mounting structure of the electronic device which concerns on 2nd Embodiment. It is a figure which shows an example of the vibration of the panel of the electronic device which concerns on 2nd Embodiment. It is a figure which shows the example of joining of a panel and a housing | casing.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing functional blocks of an electronic device 1 according to an embodiment of the present invention. The electronic device 1 is, for example, a mobile phone (smart phone), and includes a panel 10, a display unit 20, a piezoelectric element 30, an input unit 40, a microphone 42, a communication unit 44, and a control unit 50. .

  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 or a synthetic resin such as acrylic. The shape of the panel 10 may be 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. As a detection method of the touch panel, any method such as a capacitance method, a resistance film method, a surface acoustic wave method (or an ultrasonic method), an infrared method, an electromagnetic induction method, and a load detection method can be used.

  The display unit 20 is a display device such as a liquid crystal display, an organic EL display, or an inorganic EL display. The display unit 20 is provided on the back 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. Or in a suitable example, the display part 20 is joined to the back surface of the panel 10 by a joining member (for example, adhesive agent). 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 adhesive member and the panel 10. By bonding the display unit 20 to the back surface of the panel 10, the attenuation of vibration of the panel 10 can be adjusted as will be described later.

  The piezoelectric element 30 is an element that expands or contracts or bends according to an electromechanical coupling coefficient of a constituent material by applying an electric signal (voltage). For these elements, for example, those made of ceramic or quartz are used. The piezoelectric element 30 may be a unimorph, bimorph, or multilayer piezoelectric element. The stacked piezoelectric element includes 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. A unimorph expands and contracts when an electric signal (voltage) is applied, and a bimorph bends when an electric signal (voltage) is applied.

  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 a user, and includes, for example, an operation button (operation key). In addition, when the panel 10 is a touch panel, 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. The voltage applied by the control unit 50 to the piezoelectric element 30 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 vibration sound. It's okay. Thereby, even when the user presses the panel 10 against his / her body with a force of 3N or more (for example, a force of 5N to 10N), the panel 10 is caused to generate sufficient vibrations, Vibrating sound can be generated through the section. 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. When 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. At this time, 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. For this reason, the panel 10 generates air conduction sound, and also generates vibration sound through a part of the body when the user contacts a part of the body (for example, cartilage of the outer ear). For example, the control unit 50 may apply an electric signal corresponding to the audio signal related to the voice of the communication partner received by the communication unit 44 to the piezoelectric element 30 to generate air conduction sound and vibration sound corresponding to the audio signal. it can. The audio signal may relate to a ringing melody or a music piece including music. Note that 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 communication unit 44 receives a baseband signal from the electronic device of the other party through wireless communication and extracts a voice signal. The extracted audio signal is output as air conduction sound or vibration sound from the panel 10 by the control unit 50. In addition, the communication unit 44 converts an audio signal collected by the microphone 42 (for example, a voice of a call made by the user) into a baseband signal, and transmits the baseband signal to the electronic device of the other party.

  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 at a certain moment, with a portion having a relatively large vibration amplitude and a portion having a relatively small vibration amplitude distributed randomly or periodically in a wide area of the panel 10. That is, a plurality of wave vibrations can be detected over a wide area (for example, substantially the entire area) of the panel 10. Even when the user presses the panel 10 against his / her body with a force of 5N to 10N, for example, 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.

  Here, 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. In this case, when the user listens to the sound, the entire ear is easily covered with the panel 10 of the electronic device 1, so that it is difficult for ambient sounds (noise) to enter the ear canal. 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. Here, 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 such a length and width may be a rectangular region, or may be an elliptical shape having the above length as the major axis and the 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. By having the dimensions and shapes as described above, the panel 10 can cover the user's ears and is tolerant of misalignment when applied to the ears.

  The electronic device 1 can transmit air conduction sound and 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, it is suitable, for example, when listening to a recorded message on a train or the like.

  In addition, since the electronic device 1 transmits vibration sound due to the vibration of the panel 10, even if the user wears an earphone or a headphone, for example, the user can touch the electronic device 1 to contact the earphone or the headphone. Sounds can be heard through headphones and body parts.

  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. In addition, when the electronic device 1 is provided with a dynamic receiver, the sound emission port is preferably closed by a member that allows gas to pass but not liquid. An example of the member that allows gas to pass but not liquid is Gore-Tex (registered trademark).

(First embodiment)
FIG. 3 is a diagram illustrating a mounting structure of the electronic device 1 according to the first embodiment. 3A is a front (front) view, and FIG. 3B is a cross-sectional view taken along the line bb in FIG. 3A. The electronic device 1 shown in FIGS. 3A and 3B 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 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 control unit 50 is mounted on a circuit board 50 a provided on the back side of the panel 10 and the display unit 20. In FIG. 3, the communication unit 44 is not shown.

  The display unit 20 is disposed substantially at the center in the short direction of the panel 10. 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.

  The microphone 42 is mounted on the circuit board 50 a in the housing 60. The periphery of the microphone 42 is covered with the sound insulation wall 32. The sound insulation wall 32 is made of rubber, for example, and forms a duct 32a communicating with the sound passage hole 42a. The sound passage hole 42a is provided on the bottom surface of the housing 60, that is, the surface intersecting with the front surface on which the panel 10 is provided. The sound passage hole 42a is waterproofed by a waterproof sheet (eg, Gore-Tex (registered trademark)) not shown. The microphone 42 collects external sounds through the sound holes 42a and the duct 32a. The microphone 42 and the duct 32a constitute a “sound collecting unit” in the present embodiment.

  By arranging the microphone 42 in the duct 32 a, when the panel 10 is vibrated by the piezoelectric element 30, the air conduction sound transmitted from the panel 10 into the housing 60 is shielded by the sound insulation wall 32 and is not easily transmitted to the microphone 42. Further, the sound transmission hole 32a through which the duct 32 communicates is provided on the bottom surface of the housing 60, so that vibration transmitted through the housing 60 from the panel 10 to the periphery of the sound transmission hole 42a is reduced. It is attenuated more than the case where it is provided in front of Therefore, it is possible to suppress abnormal noise generated by vibration of the housing 60 and sound leakage of the call voice, and to reduce noise collected by the microphone 42 and sound return (echo) of the call voice.

  Moreover, in a preferable aspect, the housing | casing 60 is comprised combining the 1st member 62 to which the panel 10 is attached, and the 2nd member 64 of another part. For example, in the example of FIGS. 3A and 3B, the upper case including the front surface is an example of the first member 62, and the rear case including the back surface is an example of the second member 64. In this configuration, the sound collection hole 42a of the sound collection unit is disposed on the second member 64, that is, the rear case side. With this configuration, when the vibration of the panel 10 is transmitted from the first member 62 to the second member 64 that is discontinuous with the first member 62, the vibration is attenuated as compared with the case where the vibration is transmitted through one continuous member. Therefore, the vibration of the housing near the sound hole 42a can be suppressed, and the noise collected by the microphone 42 and the sound return (echo) of the call voice can be reduced.

  FIG. 4 is a diagram illustrating an example of vibration of the panel 10 of the electronic device 1 according to the first embodiment. In the electronic apparatus 1 according to the first embodiment, the piezoelectric element 30 is provided on the upper part of the panel 10, and the display unit 20 is attached to the panel 10. For this reason, 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. Further, by providing a sound collecting section having the duct 32a and the microphone 42 on the lower side of the panel 10, the vibration in the panel 10 is attenuated as the position of the microphone 42 or the sound passage hole 42a ahead is approached. Can do. As a result, noise and echo collected by the microphone 42 can be reduced.

  As described above, according to the electronic apparatus 1 according to the present embodiment, the panel 10 is deformed due to the deformation of the piezoelectric element 30 attached to the back surface of the panel 10, and the object that contacts the deformed panel 10 is detected. It conveys air conduction sound and vibration sound to it. Accordingly, air conduction sound and vibration sound can be transmitted to the user without causing the vibrating body to protrude from the outer surface of the housing 60, so that a very small vibrating body compared to the housing is brought into contact with the human body. The usability is improved as compared with the electronic device described in 1. In addition, since it is not necessary to put the user's ears on the piezoelectric element itself, 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. Thereby, the piezoelectric element 30 can be attached to the panel 10 in a state in which the degree of freedom of deformation of the piezoelectric element 30 is hardly hindered. The joining member 70 can be a non-heating type curable adhesive. Thereby, there is an advantage that thermal stress shrinkage hardly occurs between the piezoelectric element 30 and the panel 10 at the time of curing. Moreover, the joining member 70 can be a double-sided tape. Thereby, there is an advantage that contraction stress is hardly applied between the piezoelectric element 30 and the panel 10 as in the case of using an adhesive.

(Second Embodiment)
FIG. 5 is a diagram illustrating a mounting structure of the electronic device 1 according to the second embodiment. 5 (a) is a front (front) view, FIG. 5 (b) is a cross-sectional view taken along line bb in FIG. 5 (a), and FIG. 5 (c) is a line cc in FIG. 5 (a). FIG. The electronic device 1 shown in FIG. 5 is a foldable mobile phone in which a cover panel (for example, an acrylic plate) that protects the display unit 20 as the panel 10 is arranged on the front surface of the upper housing 60. In the second embodiment, a reinforcing member 80 is disposed between the panel 10 and the piezoelectric element 30. The reinforcing member 80 is a 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. In the second embodiment, 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. In addition, the support part 90 is not limited to the structure as a part of the housing | casing 60, It is possible to comprise as a member independent of the housing | casing 60 with a metal, resin, etc.

  In the second embodiment, the microphone 42 is provided on the back side of the operation button of the input unit 40. In this example, the sound hole 42 a is provided on the side surface of the housing 60, for example, and a duct 32 a that communicates with the sound hole 42 is formed by the sound insulating wall 32 that covers the microphone 42. According to such a configuration, when the panel 10 is vibrated by the piezoelectric element 30, the vibration is attenuated toward the lower part of the panel 10, and thus is generated when the casing 60 vibrates due to the vibration of the panel 10. Abnormal noise and sound leakage of the call voice can be suppressed, and noise collected by the microphone 42 in the duct 32a through the sound hole 42a and sound return (echo) of the call voice can be reduced.

  FIG. 6 is a diagram illustrating an example of vibration of the panel 10 of the electronic device 1 according to the second embodiment. In the electronic device 1 according to the second embodiment, the panel 10 is an acrylic plate having a lower rigidity than the glass plate, and the display unit 20 is not bonded to the back surface of the panel 10. Compared to the electronic apparatus 1 according to the first embodiment, the amplitude generated by the piezoelectric element 30 is increased. In addition, 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 vibration sound by bringing his / her ear into contact with an arbitrary position of the panel 10 in addition to the air conduction sound through the air.

  As described above, according to the electronic apparatus 1 according to the present embodiment, the reinforcing member 80 and the panel 10 are deformed due to the deformation of the piezoelectric element 30 attached to the panel 10 via the reinforcing member 80, and the deformation is performed. The air conduction sound and the vibration sound are transmitted to the object in contact with the panel 10. Thereby, the air conduction sound and the vibration sound can be transmitted to the user without placing the vibration body itself on the ear. 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 vibration sound can be transmitted to the user without causing the vibrating body to protrude from the outer surface of the housing 60. In addition, the panel 10 is deformed to transmit air conduction sound and 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 vibration sound by bringing his / her ear into contact with an arbitrary position of the panel 10 in addition to the air conduction sound through the air.

  Further, by arranging the reinforcing member 80 between the piezoelectric element 30 and the panel 10, for example, when an external force is applied to the panel 10, the external force 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.

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, the functions included in each member, each step, etc. can be rearranged so that there is no logical contradiction, and a plurality of components, steps, etc. can be combined into one or divided. is there.

  For example, as illustrated in FIG. 7, the panel 10 may be configured to be bonded to the housing 60 by the bonding member 70. Thus, by making it difficult for the vibration from the panel 10 to be directly transmitted to the housing 60, it is possible to reduce the possibility that the user drops the electronic device 1 as compared with the case where the housing itself vibrates greatly. 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. Moreover, 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 | occur | produce between the housing | casing 60 and the panel 10 easily.

  For example, when the panel 10 and the display unit 20 are configured not to overlap each other, the piezoelectric element 30 may be disposed at the center of the panel 10. When the piezoelectric element 30 is disposed in 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 vibration sound can be recognized even if it is touched. Similar to the above-described embodiment, a plurality of piezoelectric elements 30 may be mounted.

  In the first and second embodiments, when the panel is arranged on the front surface of the housing, the case where the sound passage hole is provided on the bottom surface or the side surface of the housing is shown. For example, it may be provided on the back surface of the housing. Moreover, although the rectangular-shaped housing | casing was shown as an example, the shape of a housing | casing may be other than a rectangular shape, for example, a flat ellipse shape etc. may be sufficient. In the above description, an example in which sound holes are provided in a plane (bottom surface or side surface) orthogonal to a plane (front surface of the casing) on which the panel is provided is shown. However, the angle at which the planes intersect is a right angle. It is not limited, and it is not limited to the case of intersecting in a straight line. In other words, when the housing has a curved surface, a sound passage hole is provided in a plane where the panel is provided or a plane which intersects the curved tangent plane, or a tangential plane which intersects the plane where the panel is provided or the curved tangential plane. The case where a sound passage hole is provided in a curved surface having a shape is also included in the first and second embodiments.

  In the electronic device 1 described above, the piezoelectric element 30 is attached to the panel 10, but may be attached to a location different from the panel 10. For example, 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.

  Further, 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. In particular, when the panel 10 is a display panel, the piezoelectric element 30 is disposed outside the display area for the display function. As a result, there is an advantage that the display is hardly disturbed. The operation panel includes the touch panel of the first embodiment. In addition, 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.

  In the first embodiment and the second embodiment, 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. As explained. However, the joining member used in the first embodiment and the second embodiment may be appropriately different depending on the member to be joined.

DESCRIPTION OF SYMBOLS 1 Electronic device 10 Panel 20 Display part 30 Piezoelectric element 32 Sound insulation wall 32a Duct 40 Input part 42 Microphone 42a Sound passage 44 Communication part 50 Control part 60 Case 70 Joining member 80 Reinforcement member 90 Support part

Claims (15)

A long piezoelectric element;
A panel to which the piezoelectric element is fixed ;
A housing for supporting the panel;
A sound collection unit having a duct communicating with the inside from the surface of the housing, and a microphone disposed therein;
An electronic device having a,
The panel is bent by the piezoelectric element so that a portion directly above the piezoelectric element rises in the longitudinal direction of the piezoelectric element in the longitudinal direction, and the contact area of the ear contacting the panel is increased. Electronic devices that transmit sound by vibration . In claim 1,
The sound collection unit has an opening of the duct in a region other than the panel on the surface of the housing.
Electronics. In claim 2,
The sound collection unit has an opening of the duct on a surface intersecting the panel on the surface of the housing.
Electronics. In any one of Claims 1 thru | or 3,
The casing includes a first member that supports the panel, and a second member that is different from the first member to which the sound collection unit is attached.
Electronics. In any one of Claims 1 thru | or 4,
The sound collection unit is an electronic device disposed on a second side opposite to the first side on which the piezoelectric element is disposed in a plan view of the housing. In any one of Claims 1 thru | or 5,
The length in the direction from the side on which the piezoelectric element is arranged in the plan view of the panel to the opposite side is equal to or longer than the length from the antitragus to the lower leg of the antiaural ring,
Electronics. In any one of Claims 1 thru | or 6.
The length in the direction intersecting with the direction from the side where the piezoelectric element is arranged in the plan view of the panel to the opposite side is equal to or longer than the length from the tragus to the antiaural ring,
Electronics. In any one of Claims 1 thru | or 7,
The piezoelectric element is bonded to the panel by a bonding member.
Electronics. In claim 8,
The joining member is a non-heating type curable adhesive,
Electronics. In claim 8,
The joining member is a double-sided tape,
Electronics. In claim 8,
The bonding portion of the piezoelectric element in the panel is located outside the overlapping region of the panel and the display unit,
Electronics. In any one of Claims 1 thru | or 11,
The panel is joined to the housing by a joining member.
Electronics. In claim 12,
The joining member is a non-heating type curable adhesive,
Electronics. In claim 12,
The joining member is a double-sided tape,
Electronics. In any one of Claims 1 thru | or 14.
The panel constitutes a part or all of the display unit, the input unit, the cover of the display unit,
Electronics.

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