WO2014091785A1 - 音響発生器、音響発生装置および電子機器 - Google Patents
音響発生器、音響発生装置および電子機器 Download PDFInfo
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- WO2014091785A1 WO2014091785A1 PCT/JP2013/067902 JP2013067902W WO2014091785A1 WO 2014091785 A1 WO2014091785 A1 WO 2014091785A1 JP 2013067902 W JP2013067902 W JP 2013067902W WO 2014091785 A1 WO2014091785 A1 WO 2014091785A1
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- Prior art keywords
- exciter
- resin layer
- wiring member
- sound
- vibration
- Prior art date
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Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/06—Arranging circuit leads; Relieving strain on circuit leads
Definitions
- the disclosed embodiment relates to a sound generator, a sound generation device, and an electronic apparatus.
- Patent Document 1 describes a sound generator that outputs a sound by vibrating a diaphragm by applying a voltage to a piezoelectric element attached to the diaphragm and causing it to vibrate.
- a lead wire is soldered to a piezoelectric element, and a voltage is applied to the piezoelectric element via the lead wire.
- One aspect of the embodiments has been made in view of the above, and an object thereof is to provide an acoustic generator, an acoustic generator, and an electronic apparatus that can obtain a favorable frequency characteristic of sound pressure.
- the acoustic generator includes at least an exciter, a vibrating body, a resin layer, and a wiring member.
- the exciter is vibrated by an electrical signal.
- the flat vibrator is provided with an exciter, and vibrates with the exciter by the vibration of the exciter.
- the resin layer is disposed so as to cover the exciter and the surface of the vibrator attached with the exciter, and is integrated with the vibrator and the exciter.
- the wiring member is connected to the exciter and inputs an electrical signal to the exciter.
- the wiring member has a bent part or a curved part, and at least a part thereof is inside the resin layer.
- a favorable sound pressure frequency characteristic can be obtained.
- FIG. 1A is a schematic plan view showing the configuration of the sound generator according to the embodiment.
- 1B is a cross-sectional view taken along line A-A ′ of FIG. 1A.
- 2 is a cross-sectional view taken along line B-B ′ of FIG. 1B.
- FIG. 3A is a schematic sectional view (No. 1) showing a modification of the lead wire.
- FIG. 3B is a schematic cross-sectional view (No. 2) showing a modification of the lead wire.
- FIG. 3C is a schematic cross-sectional view (No. 3) showing a modification of the lead wire.
- FIG. 4 is a schematic plan view (No. 1) showing a modification of the lead wire.
- FIG. 5 is a schematic plan view (No. 2) showing a modification of the lead wire.
- FIG. 1A is a schematic plan view showing the configuration of the sound generator according to the embodiment.
- 1B is a cross-sectional view taken along line A-A ′ of FIG. 1A.
- FIG. 6 is a schematic plan view (No. 3) showing a modification of the lead wire.
- FIG. 7A is a schematic plan view showing a modification of the frame and the lead wire.
- 7B is a cross-sectional view taken along line C-C ′ of FIG. 7A.
- FIG. 8A is a diagram illustrating a configuration of the sound generation device according to the embodiment.
- FIG. 8B is a diagram illustrating a configuration of the electronic device according to the embodiment.
- FIG. 9A is a schematic plan view showing a modification in the case where flexible wiring is used as the wiring member.
- 9B is a cross-sectional view taken along line D-D ′ of FIG. 9A.
- FIG. 1A is a schematic plan view showing the configuration of the sound generator 1 according to the embodiment
- FIG. 1B is a cross-sectional view taken along line A-A ′ of FIG. 1A.
- FIGS. 1A and 1B show a three-dimensional orthogonal coordinate system including a Z-axis having a vertically upward direction as a positive direction and a vertically downward direction as a negative direction. Such an orthogonal coordinate system may also be shown in other drawings used in the following description. Moreover, in FIG. 1A, illustration of the resin layer 7 is omitted.
- FIG. 1B shows the sound generator 1 greatly exaggerated in the thickness direction (Z-axis direction).
- the sound generator 1 includes a frame 2, a diaphragm 3, a piezoelectric element 5, and lead wires 6a and 6b. As shown in FIG. 1A, in the following description, the case where there is one piezoelectric element 5 is illustrated, but the number of piezoelectric elements 5 is not limited.
- the frame body 2 is constituted by two frame members having the same shape of a rectangular frame shape, and supports the diaphragm 3 by sandwiching the peripheral edge portion of the diaphragm 3.
- the diaphragm 3 has a flat shape such as a plate shape or a film shape, and a peripheral portion thereof is sandwiched and fixed by the frame body 2. That is, the diaphragm 3 is supported by the frame body 2 in a state of being stretched in the frame of the frame body 2.
- the vibrating body 3 a is a portion having a substantially rectangular shape in the frame of the frame body 2.
- the diaphragm 3 can be formed using various materials such as resin and metal.
- the diaphragm 3 can be composed of a resin film such as polyethylene or polyimide having a thickness of 10 to 200 ⁇ m.
- the thickness and material of the frame body 2 are not particularly limited.
- the frame 2 can be formed using various materials such as metal and resin.
- a stainless steel having a thickness of 100 to 1000 ⁇ m can be suitably used as the frame 2 because of its excellent mechanical strength and corrosion resistance.
- FIG. 1A shows the frame 2 in which the shape of the inner region is substantially rectangular, but it may be a polygon such as a parallelogram, trapezoid, or regular n-gon. In this embodiment, as shown to FIG. 1A, the example which is substantially rectangular shape is shown.
- the piezoelectric element 5 is an exciter which is provided by being attached to the surface of the vibrating body 3a, etc., and excites the vibrating body 3a by receiving a voltage to vibrate.
- the piezoelectric element 5 includes, for example, a laminate in which piezoelectric layers 5a, 5b, 5c, and 5d made of four ceramic layers and three internal electrode layers 5e are alternately laminated, Surface electrode layers 5f and 5g formed on the upper and lower surfaces of the laminate, and external electrodes 5h and 5j formed on the side surfaces where the internal electrode layer 5e is exposed.
- the piezoelectric element 5 has a plate shape, and the main surface on the upper surface side and the lower surface side has a polygonal shape such as a rectangular shape or a square shape.
- the piezoelectric layers 5a, 5b, 5c, and 5d are polarized as shown by arrows in FIG. 1B. In other words, polarization is performed such that the direction of polarization with respect to the direction of the electric field applied at a certain moment is reversed between one side and the other side in the thickness direction (Z-axis direction in the figure).
- the lead wires 6a and 6b are examples of wiring members and are connected to the external electrodes 5h and 5j, respectively.
- a voltage is applied to the piezoelectric element 5 via the lead wires 6a and 6b, for example, at a certain moment, the piezoelectric layers 5c and 5d on the side bonded to the vibrating body 3a contract and the upper surface side of the piezoelectric element 5 is shrunk.
- the piezoelectric layers 5a and 5b are deformed to extend. Therefore, by applying an AC signal to the piezoelectric element 5, the piezoelectric element 5 can bend and vibrate, and the vibrating body 3a can be bent.
- the main surface of the piezoelectric element 5 is joined to the main surface of the vibrating body 3a by an adhesive such as an epoxy resin.
- piezoelectric layers 5a, 5b, 5c, and 5d materials constituting the piezoelectric layers 5a, 5b, 5c, and 5d.
- PZT lead zirconate titanate
- Bi layered compounds materials constituting the piezoelectric layers 5a, 5b, 5c, and 5d
- lead-free piezoelectric materials such as tungsten bronze structural compounds, and the like have been used conventionally.
- Piezoelectric ceramics can be used as materials constituting the piezoelectric layers 5a, 5b, 5c, and 5d.
- various metal materials can be used as the material of the internal electrode layer 5e.
- the piezoelectric layers 5a, 5b, 5c, and 5d are contained, the piezoelectric layers 5a, 5b, 5c, and 5d and the internal electrode layer 5e Since the stress due to the difference in thermal expansion can be reduced, the piezoelectric element 5 free from stacking faults can be obtained.
- the sound generator 1 is disposed so as to cover the surfaces of the piezoelectric element 5 and the diaphragm 3 within the frame of the frame body 2, and is integrated with the diaphragm 3 and the piezoelectric element 5.
- the resin layer 7 is further provided.
- the resin layer 7 is preferably formed using, for example, an acrylic resin so that the Young's modulus is about 1 MPa to 1 GPa.
- the resin layer 7 shows a state in which the resin layer 7 is formed so as to have the same height as that of the frame 2, it is sufficient that the piezoelectric element 5 is embedded, for example, the resin layer 7 has a frame. It may be formed to be higher than the height of the body 2.
- a bimorph type stacked piezoelectric element is taken as an example, but the present invention is not limited to this.
- it may be a unimorph type in which a piezoelectric element that expands and contracts is attached to the vibrating body 3a.
- the lead wire vibrates due to the vibration of the diaphragm, and due to the vibration of the lead wire, the peak (the portion where the sound pressure is higher than the surroundings) and the dip (the surroundings are higher than the surroundings)
- the peak the portion where the sound pressure is higher than the surroundings
- the dip the surroundings are higher than the surroundings
- the vibration of the lead wires 6a and 6b is suppressed by embedding at least a part of the lead wires 6a and 6b in the resin layer 7. Thereby, the peak or dip level in the frequency characteristic of the sound pressure caused by the vibration of the lead wires 6a and 6b can be reduced.
- vibrations of the lead wires 6a and 6b are not easily transmitted to the piezoelectric element 5, so that the peak or dip in the frequency characteristic of sound pressure can be reduced.
- the level of can be further reduced.
- the lead wires 6a and 6b As the lead wires 6a and 6b, stranded wires obtained by twisting a plurality of conductive wires can be used. Since the stranded wire has higher flexibility than the single wire, the use of the stranded wire as the lead wires 6a and 6b makes it difficult to cause breakage due to vibration compared to the case where the single wire is used. The lead wires 6a and 6b do not necessarily need to be stranded wires.
- the lead wires 6a and 6b are provided with play. Thereby, since the vibration of the lead wires 6a and 6b is absorbed by the play portion, the vibration of the lead wires 6a and 6b can be further suppressed.
- the lead wires 6a and 6b may be provided with a curved portion or a bent portion.
- a recess may be provided in the frame body 2, and the lead wires 6a and 6b may be taken out through the recess.
- the wiring member for inputting an electric signal to the piezoelectric element 5 is not limited to the lead wires 6a and 6b.
- a flexible wiring in which a metal foil such as copper or aluminum is sandwiched between resin films is used as the wiring member. Also good.
- FIG. 2 is a cross-sectional view taken along line B-B ′ of FIG. 1B.
- the lead wire 6b will be described here, the lead wire 6a is assumed to be the same as the lead wire 6b.
- the lead wire 6 b is inside the resin layer 7.
- the lead wire 6b associated with the vibration of the vibrating body 3a is compared with the case where the lead wire 6b is not inside the resin layer 7. Vibration can be suppressed. For this reason, it is possible to suppress a peak or dip in the frequency characteristic of the sound pressure due to the vibration of the lead wire 6b.
- the lead wire 6 b is covered with the resin layer 7 at the connecting portion 61 with the piezoelectric element 5.
- the vibration of the lead wire 6b is reduced as compared with the case where the portion other than the connecting portion 61 is embedded in the resin layer 7. Since it becomes difficult to be transmitted to the piezoelectric element 5, the peak or dip level in the frequency characteristic of the sound pressure can be further reduced.
- the lead wire 6 b is not easily detached from the piezoelectric element 5, so that the lead wire 6 b is detached from the piezoelectric element 5 due to vibration of the vibrating body 3 a and sound is output. It can be prevented from disappearing.
- the lead wire 6 b is fixed to the upper part of the frame body 2, and is curved between the fixing portion 62 for the frame body 2 and the connection portion 61 for the piezoelectric element 5. Part 63.
- the vibration of the lead wire 6b causes the bending portion 63 (that is, the bending portion 63). Therefore, the vibration of the lead wire 6b can be further suppressed as compared with a lead wire that does not have the bending portion 63 (that is, is provided linearly).
- the lead wire 6b is provided with the curved portion 63, there is a margin in the length of the lead wire 6b. Therefore, even if the lead wire 6b is pulled by the vibration of the vibrating body 3a, a load is applied to the lead wire 6b. Hateful. Therefore, damage to the lead wire 6b can be prevented.
- the bending portion 63 is bent when the vibrating body 3a is viewed from the side in a direction parallel to the main surface of the vibrating body 3a (that is, the Y-axis direction in the figure). That is, since the bending portion 63 is curved along the vibration direction of the vibrating body 3a (that is, the Z-axis direction in the drawing), it effectively absorbs the vibration of the lead wire 6b accompanying the vibration of the vibrating body 3a. Can do.
- the bending portion 63 is provided outside the resin layer 7.
- vibration can be absorbed by the bending portion 63 of the lead wire 6b outside the resin layer 7 while suppressing vibration of the lead wire 6b inside the resin layer 7 by the resin layer 7. For this reason, the peak or dip level in the frequency characteristic of sound pressure can be further reduced.
- the lead wires 6 a and 6 b included in the acoustic generator 1 have the curved portion 63, and at least a part thereof is buried in the resin layer 7. Therefore, the vibration of the lead wires 6a and 6b can be suppressed, and the peak or dip level in the frequency characteristic of the sound pressure caused by the vibration of the lead wires 6a and 6b can be reduced. Therefore, according to the sound generator 1, it is possible to obtain a favorable sound pressure frequency characteristic.
- FIG. 3A, 3B, and 3C are schematic cross-sectional views showing modified examples of the lead wires 6a and 6b
- FIGS. 4 to 6 are schematic plan views showing modified examples of the lead wire 6b.
- 3A, 3B, and 3C are cross-sectional views when the sound generator 1 is cut at the same position as the line B-B 'of FIG. 1B.
- the bending portion 63 of the lead wire 6b is provided outside the resin layer 7, but the position of the bending portion 63 is not limited to this.
- the curved portion 63 included in the lead wire 6b may be provided inside the resin layer 7.
- vibration that could not be suppressed by the resin layer 7 can be absorbed by the bending portion 63.
- the curved portion 63 included in the lead wire 6 b may be provided inside and outside the resin layer 7, respectively. Thereby, the vibration of the lead wire 6b can be absorbed both inside and outside the resin layer 7.
- the bending portion 63 may have a shape provided inside and outside the resin layer 7 so as to minimize the sag of the bending portion 63 shown in FIG. 3B. 3C, the height of the portion where the lead wire 6b extends horizontally from the outside to the inside of the frame 2 and the height of the connecting portion 61 between the lead wire 6b and the piezoelectric element 5 are the same. In this area, the bending portion 63 is located.
- the bending portion 63 is curved when the vibrating body 3 a is viewed from the side in a direction parallel to the main surface of the vibrating body 3 a (that is, the Y-axis direction in the drawing).
- the bending direction of the bending portion 63 is not limited to this.
- the bending portion 63 may be bent when the vibrating body 3a is viewed in a plan view from a direction perpendicular to the main surface of the vibrating body 3a (that is, the Z-axis direction in the figure).
- region of lead wire 6a, 6b becomes thin in the vibration direction of the vibrating body 3a, the height reduction of the acoustic generator 1 can be achieved.
- the bending portion 63 may be arranged in a region having a relatively large amplitude on the vibration surface of the vibrating body 3a.
- vibration of the lead wires 6 a and 6 b is suppressed by providing the curved portion 63 in a region where the amplitude is relatively large, but the lead wires 6 a and 6 b themselves are connected to the vibration surface of the vibrating body 3 a. You may arrange
- a first region 33 having a small amplitude and a second region 34 having a larger amplitude than the first region 33 are present on the vibration surface of the vibrating body 3a.
- the vibration of the lead wires 6a and 6b itself can be reduced.
- FIG. 5 shows virtual lines L1 and L2 that partition the first region 31 and the second region 32
- FIG. 6 shows a virtual line that partitions the first region 33 and the second region 34.
- the lines L3 and L4 are shown, the positions, shapes, numbers, etc. of the virtual lines L1 to L4 are merely examples, and are not limited to those shown in FIGS.
- the lead wires 6a and 6b are disposed in the first region 33 having a relatively small amplitude.
- the lead wires 6a and 6b are disposed in the second region 34 having a relatively large amplitude. You may arrange. Thereby, since the vibration of the vibrating body 3a in the region where the amplitude is relatively large is hindered by the weight of the lead wires 6a and 6b, the peak and dip level in the frequency characteristic of the sound pressure can be suppressed to be small.
- the piezoelectric element 5 has a longitudinal direction and a short direction in plan view, the effect can be generated with a smaller distance by providing the lead wires 6a and 6b in the short direction of the piezoelectric element 5.
- FIG. 7A is a schematic plan view showing a modification of the frame body 2 and the lead wires 6a and 6b.
- FIG. 7B is a cross-sectional view taken along line C-C ′ of FIG. 7A.
- the frame 2 ′ has a recess 21, and the lead wires 6 a and 6 b are taken out through the recess 21.
- lead wire 6a, 6b does not protrude upwards rather than frame 2 ', the height reduction of the sound generator 1 can be achieved.
- the lead wires 6a and 6b may come into contact with this member. Therefore, the lead wires 6a and 6b are not easily damaged.
- FIG. 8A is a diagram illustrating a configuration of the sound generation device 20 according to the embodiment
- FIG. 8B is a diagram illustrating a configuration of the electronic device 50 according to the embodiment.
- FIG. 8A is a diagram illustrating a configuration of the sound generation device 20 according to the embodiment
- FIG. 8B is a diagram illustrating a configuration of the electronic device 50 according to the embodiment.
- only the component required for description is shown and description about a general component is abbreviate
- the sound generator 20 is a sound generation device such as a so-called speaker, and includes, for example, a sound generator 1 and a housing 30 that houses the sound generator 1 as shown in FIG. 8A.
- the housing 30 resonates the sound generated by the sound generator 1 and radiates the sound to the outside through an opening (not shown) formed in the housing 30.
- the sound pressure in a low frequency band can be increased.
- the sound generator 1 can be mounted on various electronic devices 50.
- the electronic device 50 is assumed to be a mobile terminal device such as a mobile phone or a tablet terminal.
- the electronic device 50 includes an electronic circuit 60.
- the electronic circuit 60 includes, for example, a controller 50a, a transmission / reception unit 50b, a key input unit 50c, and a microphone input unit 50d.
- the electronic circuit 60 is connected to the sound generator 1 and has a function of outputting an audio signal to the sound generator 1.
- the sound generator 1 generates sound based on the sound signal input from the electronic circuit 60.
- the electronic device 50 includes a display unit 50e, an antenna 50f, and the sound generator 1. Further, the electronic device 50 includes a housing 40 that accommodates these devices.
- each device including the controller 50a is accommodated in one housing 40, but the accommodation form of each device is not limited. In the present embodiment, it is sufficient that at least the electronic circuit 60 and the sound generator 1 are accommodated in one housing 40.
- the controller 50 a is a control unit of the electronic device 50.
- the transmission / reception unit 50b transmits / receives data via the antenna 50f based on the control of the controller 50a.
- the key input unit 50c is an input device of the electronic device 50 and accepts a key input operation by an operator.
- the microphone input unit 50d is also an input device of the electronic device 50, and accepts a voice input operation by an operator.
- the display unit 50e is a display output device of the electronic device 50, and outputs display information based on the control of the controller 50a.
- the sound generator 1 operates as a sound output device in the electronic device 50.
- the sound generator 1 is connected to the controller 50a of the electronic circuit 60, and emits sound upon application of a voltage controlled by the controller 50a.
- the electronic device 50 is described as a portable terminal device.
- the electronic device 50 is not limited to the type of the electronic device 50, and may be applied to various consumer devices having a function of emitting sound.
- flat-screen TVs and car audio equipment are, of course, products that have the function of producing sound such as "speaking” and the function of playing music, such as various products such as vacuum cleaners, washing machines, refrigerators, and microwave ovens. May be used.
- the piezoelectric element 5 is provided on one main surface of the vibrating body 3a.
- the present invention is not limited to this, and the vibration element 3a is provided on both surfaces.
- a piezoelectric element 5 may be provided.
- the case where the shape of the inner region of the frame body 2, 2 ′ is substantially rectangular is taken as an example, and it may be a polygon, but is not limited to this. It may be circular or elliptical.
- frame bodies 2 and 2 ' may be comprised by a single member.
- the lead wires 6a and 6b are taken out from the inside of the frame bodies 2 and 2 ′.
- a terminal board connection point
- the terminal board and the piezoelectric element 5 may be connected by lead wires 6a and 6b.
- a voltage can be applied to the piezoelectric element 5 via the external terminal, the terminal board, and the lead wires 6a and 6b by connecting the external terminal to the terminal board provided on the frames 2 and 2 '.
- the vibration wave propagating through the frame bodies 2 and 2 'around the terminal board can be disturbed.
- the temperature around the terminal board partially rises, so that thermal expansion occurs and vibration waves are likely to be disturbed.
- the reflected wave returning from the frames 2, 2 ′ to the diaphragm 3 can be disturbed.
- the resonance frequencies can be partially unbalanced, so that the sound pressure peaks at the resonance points can be varied and the frequency characteristics of the sound pressure can be flattened. That is, it is possible to obtain better frequency characteristics of sound pressure.
- the wiring member is not limited to the lead wires 6a and 6b.
- flexible wiring may be used as the wiring member.
- FIG. 9A is a schematic plan view showing a modification in the case where flexible wiring is used as the wiring member.
- FIG. 9B is a cross-sectional view taken along the line D-D ′ of FIG. 9A.
- the sound generator 1 may include a flexible wiring 6c instead of the lead wires 6a and 6b.
- the flexible wiring 6c is configured by covering a metal foil such as copper or aluminum with an insulator such as a resin film.
- the metal foil of the flexible wiring is thin in the vibration direction of the vibrating body 3a, it is easy to absorb the vibration of the piezoelectric element 5 and the vibrating body 3a. In addition, the acoustic generator 1 can be reduced in height. Furthermore, since the metal foil of the flexible wiring is covered with an insulator, there is no possibility of causing a short circuit with the frame 2.
- a part of the flexible wiring 6c (here, the connecting portion 61 with the piezoelectric element 5) is embedded in an insulator (resin layer 7) (see FIG. 9B). Further, the flexible wiring 6c is fixed to the upper part of the frame 2 like the lead wires 6a and 6b, and between the fixing part 62 to the frame 2 and the connection part 61 to the piezoelectric element 5, A curved portion 63 is provided.
- the vibration of the flexible wiring 6c can be suppressed by embedding a part of the flexible wiring 6c in the resin layer 7 and further providing the curved portion 63.
- the bending portion 63 is provided outside the resin layer 7 in the same manner as the bending portion 63 of the lead wires 6a and 6b. It may be embedded or may be provided both inside and outside the resin layer 7.
- the exciter is the piezoelectric element 5
- the exciter is not limited to the piezoelectric element, and a function that vibrates when an electric signal is input thereto.
- an electrodynamic exciter, an electrostatic exciter, or an electromagnetic exciter well known as an exciter for vibrating a speaker may be used.
- the electrodynamic exciter is such that an electric current is passed through a coil disposed between the magnetic poles of a permanent magnet to vibrate the coil.
- the electrostatic exciter is composed of two metals facing each other. A bias and an electric signal are passed through the plate to vibrate the metal plate, and an electromagnetic exciter is an electric signal that is passed through the coil to vibrate a thin iron plate.
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Description
2、2’ 枠体
3 振動板
3a 振動体
5 圧電素子
5a、5b、5c、5d 圧電体層
5e 内部電極層
5f、5g 表面電極層
5h、5j 外部電極
6a、6b リード線
61 接続部
62 固定部
63 湾曲部
7 樹脂層
20 音響発生装置
30、40 筐体
50 電子機器
50a コントローラ
50b 送受信部
50c キー入力部
50d マイク入力部
50e 表示部
50f アンテナ
60 電子回路
Claims (10)
- 電気信号により振動する励振器と、
前記励振器が取り付けられており、該励振器の振動によって該励振器とともに振動する扁平な振動体と、
前記励振器および該励振器が取り付けられた前記振動体の表面に被せるように配置されて、前記振動体および前記励振器と一体化された樹脂層と、
前記励振器に接続されて、該励振器に電気信号を入力する配線部材と
を少なくとも有しており、
前記配線部材は、屈曲部または湾曲部を有しており、さらに、少なくとも一部が前記樹脂層の内部にあることを特徴とする音響発生器。 - 前記屈曲部または湾曲部は、前記樹脂層の外部に設けられていること
を特徴とする請求項1に記載の音響発生器。 - 前記屈曲部または湾曲部は、前記樹脂層の内部に設けられていること
を特徴とする請求項1に記載の音響発生器。 - 前記配線部材の前記励振器との接続部が前記樹脂層で覆われていること
を特徴とする請求項1~3のいずれか一つに記載の音響発生器。 - 前記配線部材は、複数の導線を撚り合わせた撚り線を含むこと
を特徴とする請求項1~4のいずれか一つに記載の音響発生器。 - 前記配線部材は、前記振動体の振動方向に薄い金属箔を含むこと
を特徴とする請求項1~4のいずれか一つに記載の音響発生器。 - 前記配線部材は、前記金属箔の一部が絶縁体で覆われていること
を特徴とする請求項6に記載の音響発生器。 - 前記振動体の外周部に設けられた枠体
をさらに有しており、
前記枠体は凹部を有しており、該凹部を介して前記配線部材が外部に取り出されること
を特徴とする請求項1~7のいずれか一つに記載の音響発生器。 - 請求項1~8のいずれか一つに記載の音響発生器と、
該音響発生器を収容する筐体と
を備えることを特徴とする音響発生装置。 - 請求項1~8のいずれか一つに記載の音響発生器と、
該音響発生器に接続された電子回路と、
該電子回路および前記音響発生器を収容する筐体と
を備え、
前記音響発生器から音響を発生させる機能を有すること
を特徴とする電子機器。
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JP2014551908A JP6016945B2 (ja) | 2012-12-12 | 2013-06-28 | 音響発生器、音響発生装置および電子機器 |
CN201380003196.3A CN103988524B (zh) | 2012-12-12 | 2013-06-28 | 音响发生器、音响发生装置以及电子设备 |
KR1020137025259A KR101518987B1 (ko) | 2012-12-12 | 2013-06-28 | 음향 발생기, 음향 발생 장치 및 전자기기 |
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WO2014091785A1 true WO2014091785A1 (ja) | 2014-06-19 |
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JP (1) | JP6016945B2 (ja) |
KR (1) | KR101518987B1 (ja) |
CN (1) | CN103988524B (ja) |
TW (1) | TWI533713B (ja) |
WO (1) | WO2014091785A1 (ja) |
Cited By (10)
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JP2016184787A (ja) * | 2015-03-25 | 2016-10-20 | 京セラ株式会社 | 圧電アクチュエータ、音響発生器、音響発生装置および電子機器 |
EP2947897A4 (en) * | 2012-12-17 | 2016-11-09 | Kyocera Corp | ACOUSTIC GENERATOR, ACOUSTIC GENERATION DEVICE, AND ELECTRONIC DEVICE |
JP2017017426A (ja) * | 2015-06-29 | 2017-01-19 | 京セラ株式会社 | 音響発生器およびこれを備えた音響発生装置、電子機器 |
CN108447977A (zh) * | 2017-02-13 | 2018-08-24 | Tdk株式会社 | 振动器件 |
JP2018152838A (ja) * | 2017-03-10 | 2018-09-27 | Tdk株式会社 | 振動デバイス |
WO2019087923A1 (ja) * | 2017-11-02 | 2019-05-09 | Tdk株式会社 | 振動デバイス |
WO2019087922A1 (ja) * | 2017-11-02 | 2019-05-09 | Tdk株式会社 | 振動デバイス |
WO2020100825A1 (ja) * | 2018-11-16 | 2020-05-22 | Tdk株式会社 | 振動デバイス及び電子機器 |
WO2020100824A1 (ja) * | 2018-11-16 | 2020-05-22 | Tdk株式会社 | 振動デバイス、電子機器、及び、振動デバイスの駆動方法 |
WO2020100828A1 (ja) * | 2018-11-16 | 2020-05-22 | Tdk株式会社 | 振動デバイス及び電子機器 |
Families Citing this family (1)
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JP6933054B2 (ja) * | 2017-02-13 | 2021-09-08 | Tdk株式会社 | 振動デバイス |
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- 2013-06-28 WO PCT/JP2013/067902 patent/WO2014091785A1/ja active Application Filing
- 2013-06-28 KR KR1020137025259A patent/KR101518987B1/ko active IP Right Grant
- 2013-06-28 CN CN201380003196.3A patent/CN103988524B/zh not_active Expired - Fee Related
- 2013-10-25 TW TW102138584A patent/TWI533713B/zh not_active IP Right Cessation
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WO2020100824A1 (ja) * | 2018-11-16 | 2020-05-22 | Tdk株式会社 | 振動デバイス、電子機器、及び、振動デバイスの駆動方法 |
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JP7087942B2 (ja) | 2018-11-16 | 2022-06-21 | Tdk株式会社 | 振動デバイス、電子機器、及び、振動デバイスの駆動方法 |
JP7234594B2 (ja) | 2018-11-16 | 2023-03-08 | Tdk株式会社 | 振動デバイス及び電子機器 |
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Also Published As
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KR101518987B1 (ko) | 2015-05-11 |
JPWO2014091785A1 (ja) | 2017-01-05 |
TW201424409A (zh) | 2014-06-16 |
CN103988524B (zh) | 2017-08-08 |
JP6016945B2 (ja) | 2016-10-26 |
TWI533713B (zh) | 2016-05-11 |
CN103988524A (zh) | 2014-08-13 |
KR20140101282A (ko) | 2014-08-19 |
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