JP6005999B2 - Electronics - Google Patents

Description

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

  Patent Document 1 describes an electronic device such as a mobile phone that transmits air conduction sound and bone conduction sound to a user. Further, in 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 human body vibration sound is sound transmitted to the user's auditory nerve through a part of the user's body (for example, the cartilage of the outer ear) that contacts the vibrating object. ing.

  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. It is described that air conduction sound and human body 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 investigation has been made on an electronic device in which a panel as a diaphragm is attached to the housing.

  An object of the present invention is to provide an electronic device that operates satisfactorily and is a type of electronic device that generates air conduction sound and vibration sound by vibrating a panel.

  An electronic apparatus according to the present invention includes a piezoelectric element, a panel that vibrates by the piezoelectric element, generates air conduction sound, and vibration sound transmitted by vibrating a part of a human body, a housing that supports the panel, A microphone disposed inside the housing, and a space in which the microphone is accommodated is communicated with a space outside the housing at a plurality of locations.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the electronic device which is a type of electronic device which vibrates a panel and generates air conduction sound and vibration sound, and operates well.

It is a figure which shows the functional block of the electronic device which concerns on one Embodiment of this invention. It is a figure which shows the suitable shape of a panel. It is a figure which shows the mounting structure of the electronic device which concerns on 1st Embodiment. It is sectional drawing along the IV-IV line in FIG. It is sectional drawing along the VV line in FIG. It is sectional drawing along the VI-VI line in FIG. It is a figure which shows the comparative example of the electronic device which concerns on 1st Embodiment. It is a figure which shows an example of 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 panel 10 is arrange | positioned with respect to the housing 60 so that at least one part of the opening part 60a formed in the housing 60 may be obstruct | occluded so that it may mention later.

  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.

  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, 24 layers, or 28 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 input unit 40 includes a first operation key 40a, a second operation key 40b, and a third operation key 40c.

  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. As a result, even when the user presses the panel 10 against his / her body with a force of 3N or more (5N to 10N), for example, sufficient vibration is generated in the panel 10 to 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 can generate an air conduction sound and a vibration sound corresponding to the audio signal by applying an electrical signal corresponding to the audio 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. 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 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. At a certain moment, the panel 10 vibrates in a manner that a portion having a relatively large vibration amplitude and a portion having a relatively small vibration amplitude are randomly distributed over the entire panel 10. That is, vibrations of a plurality of waves are detected over the entire 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. 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 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)
3 to 6 are diagrams illustrating a mounting structure of the electronic device 1 according to the first embodiment. FIG. 3 is a front view. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. FIG. 5 is a cross-sectional view taken along line VV in FIG. FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG.

  The electronic device 1 shown in FIGS. 3 to 6 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 and the input unit 40 are supported by the housing 60. The panel 10 and the input unit 40 each block at least a part of the opening 60a of the housing 60. The display unit 20 and the piezoelectric element 30 are bonded to the panel 10 by a bonding 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 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 housing 60 has a key support portion 62. The key support portion 62 is extended from the inner wall of the housing 60. The key support part 62 supports the first operation key 40a, the second operation key 40b, and the third operation key 40c. Although not shown in detail in FIG. 3, as shown in FIGS. 5 and 6, the first operation key 40a, the second operation key 40b, and the third operation key 40c are arranged apart from each other. In other words, there are gaps between the first operation key 40a and the second operation key 40b and between the second operation key 40b and the third operation key 40c. The first operation key 40a, the second operation key 40b, and the third operation key 40c are arranged away from the housing 60. That is, there is a gap between the first operation key 40a, the second operation key 40b, the third operation key 40c, and the housing 60.

  Further, the first operation key 40a, the second operation key 40b, and the third operation key 40c are arranged apart from the panel 10. That is, there is a gap between the first operation key 40a, the second operation key 40b, the third operation key 40c, and the panel 10. Since the panel 10 and the first operation key 40a, the second operation key 40b, and the third operation key 40c are arranged apart from each other, when the panel 10 vibrates, the panel 10 that vibrates, the first operation key 40a, and the first operation key 40a. The 2 operation key 40b and the 3rd operation key 40c contact | abut, and it becomes difficult to generate abnormal noise.

  A hole 62 a is formed in the key support portion 62. The key support portion 62 has a rib 62b that protrudes toward the circuit board 55 around the hole portion 62a. As described later, the rib 62b and the circuit board 55 form a microphone housing portion (a space in which the microphone is housed).

  The microphone 42 is disposed at the lower part of the housing 60. The microphone 42 is disposed in the vicinity of the end portion on the opposite side to the side where the piezoelectric element 30 is disposed in the longitudinal direction of the housing 60. The microphone 42 a is mounted on a circuit board 55 provided inside the housing 60. The microphone 42 is surrounded by the ribs 62 when the circuit board 55 is disposed inside the housing 60. That is, the microphone 42 is accommodated in a microphone accommodating portion formed by the rib 62 b and the circuit board 55. The microphone 42 collects sound emitted outside the housing through a hole 62 a formed in the key support portion 62. In other words, the sound emitted outside the housing is input to the microphone 42 through the hole 62 a formed in the key support portion 62.

  The waterproof sheet 31 is disposed on the side of the hole 62a in the microphone housing portion. The waterproof sheet 31 is a sheet-like member made of, for example, Gore-Tex (registered trademark). The waterproof sheet 31 does not allow water to pass but allows air to pass therethrough. The waterproof sheet 31 guides sound to the microphone 42 through the hole 62a, and makes it difficult for water to enter the microphone housing portion from the hole 62a.

  As shown in FIG. 5, the hole 62 a is in a position corresponding to the gap between the first operation key 40 a and the second operation key 40 b in the thickness direction of the housing 60.

  A ring rubber 32 is provided around the microphone 42. The ring rubber 32 is made of an elastic member. The ring rubber 32 is provided between the waterproof sheet 31 and the microphone 42 so as to surround the outer periphery of the microphone 42. By arranging the ring rubber 32, it is difficult for sound generated in a region different from the microphone housing portion (for example, a space in which the circuit board 50 is arranged inside the housing 60) to reach the sound input surface of the microphone 42, The sensitivity of the microphone 42 is improved. For example, the ring rubber 32 has a shape (annular in a plan view) in which a through-hole is formed at the center of a cylindrical elastic member, but the shape is not limited thereto.

  The key switches 46a, 46b, and 46c are mounted on the circuit board 55 corresponding to the first operation key 40a, the second operation key 40b, and the third operation key 40c, respectively. As shown in FIG. 6, a rubber sheet 48 that is an elastic member is disposed between the first operation key 40 a, the second operation key 40 b, the third operation key 40 c, and the key support portion 62 of the housing 60. The first operation key 40a, the second operation key 40b, and the third operation key 40c are supported by the key support portion 62 via the rubber sheet 48. The rubber sheet 48 is made of, for example, silicon rubber.

  The rubber sheet 48 has a pusher 48a at a position corresponding to the first operation key 40a, the second operation key 40b, and the third operation key 40c. The key switches 46a, 46b and 46c are pressed by the pusher 48a when the first operation key 40a, the second operation key 40b and the third operation key 40c are pressed. And a predetermined electrical signal is transmitted to the control part 50 with a press.

  The rubber sheet 48 is not provided over the entire key support portion 62 but is provided on a part of the key support portion 62 on the panel 10 side. That is, the rubber sheet 48 is provided at the position shown in FIG. 6, that is, the position along the VI-VI line in FIG. 3, but is provided at the position shown in FIG. 5, ie, the position along the VV line in FIG. It is not done. The rubber sheet 48 supports the first operation key 40a, the second operation key 40b, and the third operation key 40c at the position shown in FIG. 6, that is, the position along the VI-VI line in FIG. 3, but the position shown in FIG. That is, the first operation key 40a, the second operation key 40b, and the third operation key 40c are not supported at positions along the line VV in FIG.

  In FIG. 5, the first operation key 40a, the second operation key 40b, the third operation key 40c, and the key support portion 62 are separated from each other. That is, there is a gap between the first operation key 40a, the second operation key 40b, the third operation key 40c, and the key support portion 62.

  As described above, according to the electronic apparatus 1 according to the present embodiment, the microphone housing portion and the hole 62a are separated by the waterproof sheet 31, but as described above, the waterproof sheet 31 allows air to pass but water does not pass. Since it has the characteristic which does not let it pass, air can move between a microphone accommodating part and the hole 62a. The hole 62a communicates with the space outside the housing 60 through a plurality of paths. That is, as shown in FIG. 4 to FIG. 6, the hole 62a includes a gap between the key support portion 62 and each operation key, a gap between the housing 60 and each operation key, the panel 10 and each operation key. Is communicated with a space outside the housing 60 by at least one of a gap between the two keys and a gap between the operation keys.

  As shown as a comparative example in FIG. 7, in the structure in which the microphone housing portion and the space outside the housing are communicated through one hole 160 formed in the housing 60, for example, the panel 10 vibrates. When the user closes the hole 160 with a finger or the like when the user is in the middle, the sound transmission between the outside of the housing 60 and the microphone 42 is blocked, and air conduction sound generated by the vibration of the panel 10 is generated inside the housing 60. Therefore, the ratio of the loudness of sound transmitted to the microphone 42 inside the housing 60 with respect to the loudness of the sound transmitted from the outside of the housing 60 to the microphone 42 is increased. As a result, the sound is generated by vibration of the panel 10. The phenomenon that the voice is collected by the microphone 42 and returned to the other party, the effect of so-called sound return (echo) is increased, and the other party is uncomfortable There is a possibility to remember.

  On the other hand, the electronic device 1 according to the present embodiment has a plurality of paths that connect the hole 62 a and the external space of the housing 60. In other words, the microphone housing portion communicates with the space outside the housing 60 at a plurality of locations. Therefore, for example, when the user operates the first operation key 40a, the gap between the housing 60 and the first operation key 40a or the gap between the panel 10 and the first operation key 40a is closed with the user's finger. Even in this case, the hole 62a is communicated with the space outside the housing 60 by, for example, a gap between the third operation key 40c and the housing 60 (between the hole 62a and the outer space of the housing 60). All routes are not blocked). Therefore, the transmission of sound between the outside of the housing 60 and the microphone 42 is difficult to be blocked, and the ratio of the magnitude of sound transmitted to the microphone 42 inside the housing 60 to the size of sound transmitted from the outside of the housing 60 to the microphone 42. Can be made sufficiently smaller than the above comparative example. That is, the sound transmitted to the microphone 42 inside the housing 60 can be masked with the sound transmitted to the microphone 42 from the outside of the housing 60, and the influence of echo can be reduced.

  As shown in FIG. 5, the hole 62 a is in a position corresponding to the gap between the first operation key 40 a and the second operation key 40 b in the thickness direction of the housing 60. With this configuration, the sound that enters the gap between the first operation key 40a and the second operation key 40b from the outside of the housing 60 reaches the microphone 42 as it is through the hole 62a. Therefore, the weekly sound of the microphone 42 is improved.

  As described above, the electronic apparatus 1 according to the first embodiment has been described with reference to FIGS. 3 to 6. However, the present invention is not limited to the above-described embodiment, and all those that can be created by persons having ordinary knowledge in the technical field. Includes variations and alternative configurations.

  For example, in the electronic device 1 according to the first embodiment, the plurality of paths connecting the hole 62a and the external space of the housing 60 are the gaps between the key support portion 62 and the operation keys, and the housing 60 and the operation keys. However, the present invention is not limited to this. For example, the microphone 42 may be a light guide member that is exposed from the opening 60 of the housing 60 and guides light emitted from a light emitting member (not shown) such as an LED disposed inside the housing 60 to the outside of the housing 60. There may be a configuration in which a plurality of light guide members and a space between each of the plurality of light guide members and the housing 60 are communicated with each other by the hole 62 a and the space outside the housing 60.

  FIG. 8 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 device 1 according to the first embodiment, 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.

  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. 9 is a diagram illustrating a mounting structure of the electronic device 1 according to the second embodiment. 9 (a) is a front view, FIG. 9 (b) is a cross-sectional view taken along line bb in FIG. 9 (a), and FIG. 9 (c) is taken along line cc in FIG. 9 (a). It is sectional drawing. The electronic device 1 shown in FIG. 9 is a foldable mobile phone in which a cover panel (acrylic plate) that protects the display unit 20 as a 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.

  FIG. 10 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.

  Also in the electronic apparatus 1 according to the second embodiment, the same configuration as that of the first embodiment (FIGS. 3 to 6) can be employed. In a foldable mobile phone such as the electronic device 1 according to the second embodiment, a microphone may be disposed in a lower casing. Since the vibration of the panel 10 can be transmitted from the upper casing to the lower casing through the connecting portion, the configuration similar to that of the first embodiment (FIGS. 3 to 6) can be used to echo the panel 10. Can be reduced.

  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. 11, 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 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 piezoelectric element 30 may be configured to vibrate corners of the housing 60 (for example, at least one of the four corners). In this case, the piezoelectric element 7 may be configured to be attached to the inner surface of the corner portion of the housing 60, or may further include an intermediate member, and the vibration of the piezoelectric element 30 may be transmitted to the corner portion of the housing 60 via the intermediate member. But you can.

  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 folding 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 31 Waterproof sheet 32 Ring rubber 40 Input part 40a 1st operation key 40b 2nd operation key 40c 3rd operation key 42 Microphone 46 Key switch 48 Rubber sheet 50 Control part 55 Circuit board 60 Housing 60a Opening portion 62 Key support portion 62a Hole portion 62b Rib 70 Joining member 80 Reinforcing member 90 Support portion 160 Hole portion

Claims (9)

A piezoelectric element that bends or stretches in the longitudinal direction ;
A panel that vibrates by the piezoelectric element and generates air conduction sound and vibration sound transmitted by vibrating a part of the human body;
A housing in which the panel is supported via a joining member ;
A microphone disposed inside the housing ,
A space in which the microphone is accommodated inside the housing is communicated with a space outside the housing at a plurality of locations .
An electronic apparatus in which one surface of the joining member is in contact with the panel, and the other surface of the joining member is in contact with the housing . An opening is formed in the housing ,
An operation member exposed to the outside of the housing from the opening;
The electronic device according to claim 1, wherein the space in which the microphone is accommodated communicates with a space outside the housing through a gap between an edge of the opening in the housing and the operation member. The operation member includes a plurality of operation keys,
The electronic device according to claim 2, wherein the space in which the microphone is accommodated communicates with a space outside the housing through a gap between a first operation key and a second operation key among the plurality of operation keys. The microphone, electronic device according to claim 3 arranged at corresponding positions in a space and a predetermined direction between the second operation key and the first operation key. The panel vibrates in a region wider than a region having a length corresponding to the distance from the lower leg of the human ear to the antitragus and a width corresponding to the distance from the tragus to the antique. The electronic device according to any one of claims 1 to 4. The said panel comprises some or all of a lid panel for enabling a display panel, an operation panel, a cover panel, and a rechargeable battery to be removable. Electronics. When the panel is a display panel,
The piezoelectric element is disposed outside a display area for the display function.
The electronic device according to claim 6. The electronic device according to any one of claims 1 to 7, wherein the panel is deformed to transmit air conduction sound and vibration sound in any part of the panel. The panel has a plurality of locations that vibrate in a direction intersecting with the main surface of the panel in the vibration region, and the amplitude value of the vibration is increased from plus to minus with time or vice versa at each location. The electronic device according to any one of claims 1 to 8, wherein the electronic device varies.

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