JP6006530B2 - 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. 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 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 piezoelectric material expands and contracts in the longitudinal direction, causing the vibrating body to bend and vibrate, 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 operates satisfactorily and vibrates a panel attached to a housing to generate a vibration sound.

An electronic apparatus according to the present invention includes a piezoelectric element that bends and vibrates in a longitudinal direction , a joining member, a diaphragm, a first casing that holds the diaphragm, and a first casing that is coupled to the first casing. 2 and an operation button disposed on the second surface of the second housing that is discontinuous with the first surface of the first housing, and is disposed on the second surface. Is attached so as to be disposed inside the diaphragm in plan view with respect to the joining member of the diaphragm, and the diaphragm is directly attached to the first casing by the joining member. The diaphragm is vibrated by the piezoelectric element so that the portion directly above the piezoelectric element rises most compared to the surrounding area including the joint portion with the joining member .

  The first casing may include a display unit that displays a menu operated by each operation button corresponding to the arrangement of the operation buttons on the first surface. The display unit may display the menu via the diaphragm. Furthermore, the display unit may be fixed by being bonded to the diaphragm.

  The location where the piezoelectric element is fixed on the diaphragm is preferably located outside the overlapping area with the display unit in plan view of the diaphragm.

  The operation button may be supported by a packing that prevents water from entering the second housing from the second surface.

  The first casing may be coupled to the second casing on the side opposite to the side where the piezoelectric element is disposed in a plan view of the diaphragm.

  The length in the direction from the side on which the piezoelectric element is fixed to the other side in plan view of the diaphragm 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 earring.

The piezoelectric element can be fixed by being bonded to the diaphragm by a second bonding member.
The second joining member may be a non-heating type curable adhesive or a double-sided tape.

Before Symbol joining member may be non-thermosetting adhesive or double-sided tape.

  The diaphragm may constitute a part or all of a display unit, an input unit, a cover of the display unit, and a lid unit for making the battery removable.

  ADVANTAGE OF THE INVENTION According to this invention, the electronic device of the type which vibrates the panel attached to a housing | casing which operate | moves favorably is 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 the example of joining of a panel and a housing | casing. 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 1st 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 mounting structure of the electronic device which concerns on 3rd Embodiment.

  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 foldable mobile phone, and includes two housings 62 and 64 connected by a connecting portion 61. The connecting portion 61 includes, for example, a hinge mechanism that connects the casings 62 and 64 so that the casings 62 and 64 can be folded, and signal lines and flexible boards that connect the various electronic circuits in the casings 62 and 64. The housing 62 includes the panel 10, the display unit 20, the piezoelectric element 30, the input unit 41, the communication unit 44, and the control unit 50. The housing 64 includes an input unit 42 and a microphone 46. A part or all of the control unit 50 may be provided on the housing 64 side.

  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. The display unit 20 may be disposed apart from the panel 10 and supported by the casing of the electronic device 1 or may be joined to the back surface of the panel 10 by a joining member (for example, an adhesive). The joining member in the case of joining the display unit 20 to the panel 10 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 curves in accordance with 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. Unimorphs expand and contract when an electrical signal (voltage) is applied, and bimorphs bend when an electrical 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 62 by a predetermined distance while being disposed on the back surface of the panel 10. The piezoelectric element 30 may be separated from the inner surface of the housing 62 by a predetermined distance even in a stretched or curved state. That is, the distance between the piezoelectric element 30 and the inner surface of the housing 62 is preferably larger than the maximum deformation amount of the piezoelectric element 30.

The input unit 41 disposed in the housing 62 receives an operation input from a user, and is, for example, a touch panel provided on the panel 10. In this case, an operation input from the user can be received by detecting the user's contact with the panel 10.
In addition, the input unit 42 disposed in the housing 62 is configured by, for example, operation buttons (operation keys).

  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 in the longitudinal direction. At this time, the panel 10 to which the piezoelectric element 30 is attached is deformed in accordance with the expansion or 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 converts the audio signal collected by the microphone 46 into a baseband signal, and transmits the baseband signal to the electronic device of the other party. In addition, the communication unit 44 receives a baseband signal from the electronic device of the other party by 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.

  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 such a manner that a portion having a relatively large vibration amplitude and a portion having a relatively small vibration amplitude are distributed randomly or periodically throughout the panel 10 at first glance. That is, vibrations of a plurality of waves are detected over a wide area (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. The panel 10 is an example of a “diaphragm” in the present embodiment.

  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. In this example, 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. 3 (a) is a front view, FIG. 3 (b) is a cross-sectional view taken along line bb in FIG. 3 (a), and FIG. 3 (c) is taken along line cc in FIG. 5 (a). It is sectional drawing. The electronic device 1 shown in FIG. 3 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 casing 62. FIG. 3A shows the front surfaces of the housings 62 and 64 in a state where the electronic apparatus 1 is opened. That is, here, the front surfaces of the housings 62 and 64 are discontinuous surfaces that face each other when folded.

  In the first 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 first 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 first embodiment, the display unit 20 is not bonded to the panel 10 but is supported by the housing 62. That is, in the electronic apparatus 1 according to the first 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 62 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 62, It is possible to comprise as a member independent of the housing | casing 62 with a metal, resin, etc.

  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.

  An input unit 44 is disposed in the housing 64. The input unit 44 is an operation button. Here, a mechanical operation button is shown that is disposed exposed on the surface of the housing 64 and that is pressed by the user to generate an electrical contact and generate an input signal. The operation buttons shown here are cross-shaped, and accept pressing of the upper, lower, right, left, and center five locations. However, the shape and number of operation buttons are not limited to this example. A circuit board 50 b on which a part of the control unit 50 is mounted is provided on the back side of the operation button in the housing 64. A switch 44a (for example, a metal dome switch) corresponding to the operation button of the input unit 44 is provided on the circuit board 50b. The switch 44a is covered with a waterproof packing 44b. The waterproof packing 44 b supports the operation buttons of the input unit 44. Such a configuration prevents water from entering from the gap between the operation button of the input unit 44 and the housing 64. The waterproof packing 44b is made of, for example, silicon rubber.

  In a preferred embodiment, the display unit 20 displays a function menu 20 a corresponding to the operation buttons of the input unit 44. Here, an example is shown in which “menu” corresponding to the left portion of the cross-shaped operation button, “select” corresponding to the center portion, and “return” corresponding to the right portion are displayed. With this display, the user can operate the input unit 44 while confirming the function assigned to the input unit 44, so that convenience is improved.

When the panel 10 is vibrated by the piezoelectric element 30, the vibration of the panel 10 is transmitted to the housing 62 to some extent. On the other hand, since the operation buttons of the input unit 44 are movable input means, a certain amount of play is allowed in the movable part. Then, the vibration of the panel 10 is transmitted to the operation button, and there is a possibility that an unnecessary sound is generated due to the operation button rattling. Therefore, in the first embodiment, by providing the operation button of the input unit 44 on the housing 64, the vibration from the panel 10 can be attenuated in the path transmitted from the housing 62 to the input unit 44 through the housing 62. it can.
By doing so, it is possible to reduce the influence of vibration that causes the operation button of the input unit 44 to be rattled. Further, since the operation button of the input unit 44 is supported by the waterproof packing 44b, the vibration of the operation button can be further reduced by the elasticity of the waterproof packing 44b.

  When the function menu 20a assigned to the operation button of the input unit 44 is displayed on the display unit 20, from the viewpoint of convenience, the input unit 44 is arranged as close as possible to the display unit 30, that is, in the vicinity of the panel 10. It is preferable. However, if the input unit 44 is provided in the vicinity of the panel 10 on the housing 62 side, vibration from the panel 10 may be transmitted to the input unit 44 without being attenuated so much. In this respect, as in the first embodiment, by providing the input unit 44 closer to the upper portion of the housing 64, the display contents and the association on the panel 10 can be easily seen and the vibration from the panel 10 is hardly transmitted. can do.

  Further, according to the electronic apparatus 1 according to the first 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 panel 10 is deformed. 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 62. 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 62. 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.

  Furthermore, for example, as shown in FIG. 4, the panel 10 may be configured to be bonded to the housing 62 by the bonding member 70. Thus, by making it difficult for the vibration from the panel 10 to be directly transmitted to the housing 62, 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. Thereby, there is an advantage that thermal stress shrinkage hardly occurs between the casing 62 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 easily between the housing | casing 62 and the panel 10.

  FIG. 5 is a diagram illustrating a mounting structure of the housing 62 according to the second embodiment. In FIG. 5, the housing 64 is not shown for convenience. 5A is a front view, and FIG. 5B is a cross-sectional view taken along the line bb in FIG. 5A. In the example shown in FIG. 5, the panel 10 and the input unit 40 are supported by a housing 62, 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 and the piezoelectric element 30 are bonded to the panel 10 by a bonding member 70, respectively. When the display unit 20 is bonded to the panel 10, the bonding member 70 is preferably an adhesive having thermosetting property or ultraviolet curable property, for example, an optical elastic resin that is a colorless and transparent acrylic ultraviolet curable adhesive. By doing so, the display unit 20 can display various display contents through the panel 10. Further, when the piezoelectric element 30 is bonded to the panel 10, the joining member 70 is an adhesive having a thermosetting property or an ultraviolet curable property, a double-sided tape, or the like, for example, a colorless and transparent acrylic ultraviolet curable adhesive. An optical elastic resin may be used. 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.

  6 and 7 are diagrams illustrating an example of the vibration of the panel 10 of the electronic apparatus 1 according to the first and second embodiments. 6 corresponds to the first embodiment shown in FIG. 3, that is, the case where the panel 10 and the display unit 20 are not joined, and FIG. 7 shows the second embodiment shown in FIG. 4, ie, the panel 10 and the display unit 20. It corresponds to the case of joining. In the electronic device 1 according to the first embodiment, the vicinity of the piezoelectric element 30 in the panel 10 vibrates most greatly, and the lower part of the panel 10 that is far from the piezoelectric element 30 is less likely to vibrate than the upper part. Therefore, vibration is less likely to be applied to the operation buttons of the input unit 44 that is disposed from the lower part of the panel 10 through the connecting unit 61. That is, the housing 62 is connected to the housing 64 on the side opposite to the position of the piezoelectric element 30, and the operation buttons of the input unit 44 are arranged on the housing 64, so that the operation buttons are affected by the vibration of the panel 10. It becomes difficult to receive. Furthermore, in the electronic device 1 according to the second embodiment, the display unit 20 is attached to the panel 10, so that the lower part of the panel 10 vibrates compared to the upper part of the panel 10 to which the piezoelectric element 30 is attached. It becomes difficult. Therefore, the generation of airway sound from the lower part of the panel 10 is reduced, and sound leakage 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. Thus, since 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 62, the patent document in which a vibrating body that is much smaller than 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 62 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.

  FIG. 8 is a diagram illustrating the structure of the electronic device 1 according to the third embodiment. In the second embodiment, the electronic device 1 is a slide type mobile phone in which housings 62 and 64 are slidably connected to each other. FIG. 8A shows a state in which the housing 64 is covered by the housing 62, and FIG. 8B shows a state in which the housings 62 and 64 are slid in the directions of arrows 62a and 64a, respectively, and deployed. Also in the second embodiment, the panel 10 that is vibrated by the piezoelectric element 30 is provided on the housing 62 side, and the operation buttons of the input unit 44 are provided on the housing 64 side. That is, the panel 10 and the input unit 44 are provided on discontinuous surfaces of the casings 62 and 64. With such a configuration, the vibration of the panel 10 can be made difficult to be transmitted to the operation buttons of the input unit 44, and sound leakage due to the vibration of the operation buttons can be reduced.

  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, 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 62 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 forms one surface of the operation unit side body, in which, for example, a key top of an operation button (operation key) is integrally formed in a foldable mobile phone.

  In the first and second embodiments, the bonding member that bonds the panel 10 and the piezoelectric element 30, the bonding member that bonds the panel 10 and the housing 62, 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 40 Input part 50 Control part 62, 64 Case 70 Joining member 80 Reinforcement member 90 Support part

Claims (15)

A piezoelectric element that bends and vibrates in the longitudinal direction ;
A joining member;
A diaphragm,
A first housing for holding the diaphragm;
A second housing coupled to the first housing;
An operation button that is discontinuous with the first surface of the first housing and is exposed on the second surface of the second housing;
Have
The piezoelectric element is attached so as to be disposed inside the diaphragm in a plan view with respect to the joining member of the diaphragm, and the diaphragm is directly attached to the first casing by the joining member. The electronic device is attached, and the diaphragm is vibrated by the piezoelectric element so that a portion directly above the piezoelectric element rises higher than a surrounding area including a joint portion with the joint member . In claim 1 ,
The first housing has a display unit on the first surface for displaying a menu operated by the operation buttons corresponding to the arrangement of the operation buttons.
Electronics. In claim 2 ,
The display unit displays the menu via the diaphragm.
Electronics. In claim 3 ,
The display unit is fixed by being bonded to the diaphragm.
Electronics. In claim 3 ,
The fixed location of the piezoelectric element in the diaphragm is located outside the overlapping area with the display unit in plan view of the diaphragm,
Electronics. In any one of Claims 1 thru | or 5 ,
The operation button is supported by a packing that prevents water from entering the second housing from the second surface.
Electronics. In any one of Claims 1 thru | or 6 .
The first casing is connected to the second casing on the side opposite to the side where the piezoelectric element is arranged in a plan view of the diaphragm.
Electronics. In any one of Claims 1 thru | or 7 ,
The length in the direction from the side on which the piezoelectric element is fixed to the other side in plan view of the diaphragm is equal to or longer than the length from the tragus to the lower leg of the earring,
Electronics. In any one of Claims 1 thru | or 8 .
The length in the direction intersecting the direction from the side on which the piezoelectric element is fixed to the other side in a plan view of the diaphragm is equal to or longer than the length from the tragus to the earring.
Electronics. In any one of Claims 1 thru | or 9 ,
The piezoelectric element is bonded and fixed to the diaphragm by a second bonding member.
Electronics. In claim 10 ,
The second bonding member is a non-heating type curable adhesive,
Electronics. In claim 10 ,
The second joining member is a double-sided tape;
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 diaphragm constitutes a part or all of a display unit, an input unit, a cover of the display unit, and a lid for making the battery removable.
Electronics.

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