JP2010119032A - Speaker device, portable electronic equipment, method for manufacturing speaker device, and method for controlling speaker device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the deterioration in the sound pressure, and to obtain sound pressure, sound quality and orientation corresponding to the purpose of application of a speaker device. <P>SOLUTION: This speaker device is provided with: a first speaker 6 and a second speaker 7 having oscillators 6a and 7a, driving parts 6b and 7b for driving the oscillators 6a and 7a, and input terminals 6c and 7c for inputting a signal to the driving parts 6b and 7b; and a support frame 8 for supporting the first speaker 6 and the second speaker 7 by covering the whole part of each of those speakers in such a state that the first speaker 6 and the second speaker 7 are faced to each other with a space 10 between the back sides of those speakers. Also, the support frame 8 is provided with: a first sound release hole 11 for releasing the sound of the first speaker 6; a second sound release hole 12 for releasing the sound of the second speaker 7; and a braking hole 13 for braking boards 6a and 7a, communicating with the space 10 between the first speaker 6 and the second speaker 7. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a speaker device used in a portable electronic device such as a portable telephone, a portable electronic device, a method for manufacturing the speaker device, and a method for controlling the speaker device.

  As portable electronic devices, for example, portable music players, information terminals such as PDAs, and communication devices such as cellular phones are known.

As an example of this type of portable electronic device, recent mobile phones have been developed in various directions such as thinning, miniaturization, and high functionality, but they are equivalent to parts used in mobile phones. There has been a demand for further reduction in thickness and size while ensuring the above function or higher. In addition, mobile phones are becoming increasingly multifunctional in order to incorporate various applications.
Japanese Patent Laying-Open No. 2003-152837 (FIG. 4)

  As described above, a speaker included in a mobile phone is used not only for a function for sounding a ring tone but also for various functions such as a music playback function and a voice playback of DTV (terrestrial digital television) broadcasting. Therefore, it is difficult to sufficiently handle these various functions with only one speaker.

  As a typical example, a mobile phone has a configuration in which a speaker is mounted on the opposite side of the surface on which the display surface of the liquid crystal display panel is arranged, and sound is heard from the back side of the display surface when watching a DTV broadcast. Will be output. For this reason, there is a problem that the sound heard on the display surface side of the liquid crystal display panel is reduced because it is affected by the output loss due to the directivity of the speaker and the mounting position and structure.

  On the contrary, when a speaker is arranged on the display surface side of the liquid crystal display panel, there is a problem that the ringtone that can be heard when the mobile phone is placed with the display surface side of the liquid crystal display panel facing down becomes small. . In particular, in the case of a foldable mobile phone, the ring tone is further reduced when the mobile phone is closed.

  Similarly, when using the TV phone function for making a call while looking at the display surface, when a call is made while looking at the display surface, the speaker is mounted on the opposite side of the display surface, as described above. There is a problem that the other party's voice can be heard.

  Conventionally, assuming such use situations (purposes of use) of mobile phones, mounting positions and sound hole areas that can improve directivity and output efficiency are set. In addition, the band deteriorated by the influence of directivity has been avoided by electrically fine-tuning using an equalizer function or the like, but there is a problem that such a design is extremely difficult.

  Further, as another measure for obtaining a good sound, the performance can be improved by using two speakers, increasing the size of the speaker itself, or increasing the thickness of the speaker. As a mobile phone equipped with two speakers, the two small speakers are arranged in parallel with the back side housing so that the two small speakers are symmetrical in the back side housing that covers the back side of the liquid crystal display panel. (See Patent Document 1). However, such a configuration leads to an increase in the area required for mounting the speaker, and there is a problem that it goes against the demand for miniaturization of the mobile phone.

  In view of the above-described problems, the present invention solves some of the problems, suppresses sound pressure deterioration, and can control sound pressure, sound quality, and directivity according to the intended use of the speaker device. It is an object of the present invention to provide a speaker device, a portable electronic device, a speaker device manufacturing method, and a speaker device control method.

  In order to achieve the above-described object, the speaker device according to the present invention is used in a portable electronic device. The speaker device includes a first speaker and a second speaker each having a diaphragm, a driving unit that drives the diaphragm, and an input terminal for inputting a signal to the driving unit. In addition, the speaker device covers and supports the entire first speaker and the second speaker in a state where the first speaker and the rear surface of the second speaker face each other with a space therebetween. A support frame. The support frame includes a first sound emitting hole for emitting sound of the first speaker, a second sound emitting hole for emitting sound of the second speaker, and a space between the first speaker and the second speaker. And a braking hole for braking the diaphragm.

  According to another aspect of the present invention, there is provided a speaker device manufacturing method including a first speaker having an input terminal for inputting a signal to a driving unit for driving a diaphragm, and a first speaker used in a portable electronic device. A support frame that covers and supports the entire first speaker and the second speaker in a state where the two speakers are opposed to each other with a space between the back side of the first speaker and the back side of the second speaker. A mounting step; a first sound emitting hole for emitting sound of the first speaker to the support frame; a second sound emitting hole for emitting sound of the second speaker; the first speaker and the second speaker; And a step of forming a braking hole for braking the diaphragm in communication with the space between the first and second spaces.

  A speaker device control method according to the present invention is a speaker device control method used in a portable electronic device, wherein the speaker device has an input terminal for inputting a signal to a drive unit that drives a diaphragm. The first speaker and the second speaker are supported so as to cover each of the first speaker and the second speaker in a state where the first speaker and the second speaker face each other with a space between the rear side of the first speaker and the rear side of the second speaker. Mounted on the supporting frame, the supporting frame having a first sound emitting hole for emitting the sound of the first speaker, a second sound emitting hole for emitting the sound of the second speaker, the first speaker, And a brake hole for braking the diaphragm by communicating with the space between the two speakers, and signals having the same phase are input to the respective input terminals of the first speaker and the second speaker. State and mutual Controlled to the other state for inputting a signal of opposite phase to.

  In the speaker device of the present invention, the front side of the first speaker and the second speaker refers to the side that emits sound to the outside by the diaphragm. Moreover, the back side of the first speaker and the second speaker refers to the opposite side of the front side. In the present invention, the structure in which the support frame covers each of the first speaker and the second speaker is strictly the first except for the first sound emitting hole, the second sound emitting hole, and the braking hole. The structure which covers each of the whole of a speaker and a 2nd speaker is pointed out.

  ADVANTAGE OF THE INVENTION According to this invention, while suppressing deterioration of a sound pressure, it becomes possible to control a sound pressure, sound quality, and directivity according to the intended purpose of a speaker apparatus.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

  The speaker device according to the present embodiment is used in a portable electronic device including a portable terminal such as a portable telephone or a PDA (Personal Data Assistant).

  1A and 1B are diagrams showing the speaker device of the present embodiment, in which FIG. 1A is a plan view, FIG. 1B is a cross-sectional view taken along line AA in FIG. 1A, and FIG. It is sectional drawing of the direction orthogonal to -A cross section. FIG. 2 is a cross-sectional view taken along line AA showing the internal configuration of the speaker device of the embodiment.

  As shown in FIG. 1A to FIG. 1C and FIG. 2, the speaker device 1 according to the embodiment includes diaphragms 6a and 7a, driving units 6b and 7b that drive the diaphragms 6a and 7a, and a driving unit. A space 10 is provided between the first speaker 6 and the second speaker 7 having input terminals 6c and 7c for inputting signals to 6b and 7b, and the back side of the first speaker 6 and the back side of the second speaker 7. And a support frame 8 that covers and supports each of the first speaker 6 and the second speaker 7 in a state of being opposed to each other.

  The first speaker 6 and the second speaker 7 are thin piezoelectric ceramic speakers in which the diaphragms 6a and 7a are exposed to the outside. It is sometimes used for voice amplification. The first speaker 6 and the second speaker 7 are provided with two (+) input terminals and two (−) input terminals as input terminals 6c and 7c. In addition, the distance between the back surfaces of the first speaker 6 and the second speaker 7 facing each other is relatively small and close to each other, and a space 10 is provided between the first speaker 6 and the second speaker 7. .

  Moreover, the 1st speaker 6 and the 2nd speaker 7 are being fixed inside the box-shaped support frame 8, as shown to Fig.1 (a)-FIG.1 (c). A wiring is electrically connected to each of the input terminals 6c and 7c of the first speaker 6 and the second speaker 7, and the wiring is drawn out to the outside of the case 9 described later through the support frame 8, The input terminals 6c and 7c are configured to be able to input signals independently.

  As shown in FIG. 2, the support frame 8 includes a first sound emission hole 11 for emitting sound of the first speaker 6, a second sound emission hole 12 for emitting sound of the second speaker 7, and The first speaker 6 and the second speaker 7 communicate with the facing space 10 and have braking holes 13 for braking the diaphragms 6a and 7a.

  As shown in FIG. 1A, the support frame 8 is provided with a first sound emitting hole 11 at a position facing the center of the diaphragm 6 a on the front side of the first speaker 6. Similarly, the support frame 8 is provided with a second sound emission hole 12 at a position facing the center of the diaphragm 7 a on the front surface side of the second speaker 7.

  As shown in FIG. 2, the braking hole 13 is in the vicinity of the back side of each of the speakers 6, 7 and is substantially parallel to the direction orthogonal to the thickness direction of the speakers 6, 7, that is, the back of the speakers 6, 7. It is provided so as to penetrate through the support frame 8 in the direction, so that the sound on the back side of the speakers 6 and 7 can be sufficiently emitted. Therefore, the brake hole 13 is provided in the support frame 8 in common with the first speaker 6 and the second speaker 7. The support frame 8 forms a space 10 between the back side of the first speaker 6 and the back side of the second speaker 7.

  A support frame 8 in which the speakers 6 and 7 are incorporated is housed and fixed inside a box-shaped case 9. The case 9 is provided with a first sound emitting hole 16 at a position corresponding to the first sound emitting hole 11 of the first speaker 6, and the second sound emitting hole 17 is a second sound emitting hole of the second speaker 7. 12 is provided at a position corresponding to 12. Therefore, the front side of the first speaker 6 and the front side of the second speaker 7 communicate with the outside through the sound emission holes 11 and 12 and the sound emission holes 16 and 17.

  In addition, an auxiliary space 20 for adding a volume to the space 10 is provided in the case 9 at a position adjacent to the braking hole 13 of the support frame 8. The auxiliary space 20 communicates with the space 10 via the brake hole 13. The auxiliary space 20 is formed in a U shape over the three side surfaces of the support frame 8 as shown in FIG.

  Further, as shown in FIG. 2, external terminals 18 and 19 electrically connected to the input terminals 6c and 7c of the speakers 6 and 7 via wirings are provided outside the case 9, respectively.

  In the present invention, the structure in which the support frame covers each of the first speaker and the second speaker is strictly the first structure except for the first sound emitting hole, the second sound emitting hole, and the braking hole. The structure which covers each of the whole of a speaker and a 2nd speaker is pointed out.

  With respect to the speaker device 1 configured as described above, operations of the diaphragms 6a and 7a of the first speaker 6 and the second speaker 7 will be described with reference to the drawings.

  3 to 6 show the movement of the diaphragms 6a and 7a of the speakers 6 and 7 when input signals are controlled and input to the input terminals of the first speaker 6 and the second speaker 7, respectively. 3 and 4 show the movements of the first speaker 6 and the second speaker 7 when signals are input in the same phase to the (+) input terminal sides of the first speaker 6 and the second speaker 7. That is, this is a movement when signals having exactly the same phase are input to the (+) input terminals of the first speaker 6 and the second speaker 7.

  Since the back side of the first speaker 6 and the back side of the second speaker 7 are arranged to face each other, as shown in FIG. 3, when the first speaker 6 moves so as to bulge upward, the second speaker 7 Move to swell downward. Conversely, as shown in FIG. 4, when the first speaker 6 moves so as to swell downward, the second speaker 7 moves so as to swell upward. That is, the first speaker 6 and the second speaker 7 move in conflict.

  As shown in FIG. 3, when the first speaker 6 moves so as to swell upward and the second speaker 7 moves so as to swell downward, the volume of the space 10 increases. On the other hand, as shown in FIG. 4, when the first speaker 6 moves so as to swell downward and the second speaker 7 moves so as to swell upward, the volume of the space 10 becomes small. The volume of the space 10 changes according to the operation of the first and second speakers 6 and 7.

  Then, the sound emitted from the speakers 6 and 7 to the space 10 side escapes from the braking hole 13 by providing the supporting frame 8 with the braking hole 13. For this reason, the sound emitted from the speakers 6 and 7 to the space 10 side has less influence on suppressing the vibrations of the speakers 6 and 7, and the sound pressure is hardly deteriorated, so that the first speaker 6 and the second speaker 7 are connected. It can be operated well. Furthermore, since the volume of the auxiliary space 20 of the case 9 serves as the volume of the space 10, the volume of the space 10 is supplemented to ensure a sufficiently large volume. For this reason, the influence which suppresses the vibration of each speaker 6 and 7 decreases, and deterioration of sound pressure can also be decreased.

  5 and 6 differ from the input signals in FIGS. 3 and 4, the signal whose phase is inverted with respect to the signal input to the (+) input terminal side of the first speaker 6 is the (+) of the second speaker 7. ) The movement at the time of the anti-phase input signal input to the input terminal side is shown.

  As shown in FIGS. 5 and 6, since the back side of the first speaker 6 and the back side of the second speaker 7 are arranged to face each other, when signals are input to the speakers 6 and 7 in opposite phases to each other. Both the first speaker 6 and the second speaker 7 move in the same direction. At this time, the volume of the space 10 is such that when the first speaker 6 and the second speaker 7 both move upward as shown in FIG. 5 and when the first speaker 6 and the second speaker 7 as shown in FIG. When both of them move so as to swell downward, the volume of the space 10 hardly changes.

  However, if the first speaker 6 and the second speaker 7 are different in size, variation in vibration characteristics, or a difference in input level, the volume of the space 10 changes to prevent vibration of one speaker. To do. However, since the brake holes 13 are provided in the support frame 8, the sound emitted from the speakers 6 and 7 to the space 10 side escapes from the brake holes 13, so that the vibration of the speakers 6 and 7 is suppressed. Therefore, the first speaker 6 and the second speaker 7 can be operated well.

  Furthermore, since the volume of the auxiliary space 20 of the case 9 serves as the volume of the space 10, the volume of the space 10 is supplemented to ensure a sufficiently large volume. For this reason, the sound emitted from the speakers 6 and 7 to the space 10 side is further less affected by the vibrations of the speakers 6 and 7, and the deterioration of the sound pressure can be further reduced.

  In addition, since the speaker device 1 can reduce the volume of the space 10 by increasing the auxiliary space 20, it is also possible to reduce the interval at which the back sides of the speakers 6 and 7 face each other. It is possible to reduce the thickness of the speakers 6 and 7 in the thickness direction.

  FIG. 7 shows sound pressure frequency characteristics at a predetermined position on the first sound emission hole 11 side shown in FIG. 1 under the input conditions of FIGS. In FIG. 7, the vertical axis represents sound pressure (dBspl), and the horizontal axis represents frequency (Hz). In FIG. 7, the solid line indicates when an in-phase signal is input, and the broken line indicates when an opposite phase signal is input.

  As shown in FIG. 7, the sound pressure increases when the same phase is input on the low sound region side, and the sound pressure increases when the opposite phase is input in the middle and high sound region. Based on this characteristic, in the mobile phone having the speaker device 1, a signal is input to the speakers 6 and 7 in the same phase at the time of sound amplification used in a use scene in which a low sound pressure that is a sound band is important. By performing the control, the low-frequency sound pressure can be increased. In addition, in this mobile phone, when playing music or the like having a wide reproduction band, control is performed so that signals are input to the speakers 6 and 7 in opposite phases to each other, so that a sound emphasizing the mid-high range can be obtained. .

  8 (8A to 8E) respectively show directivities at specific frequencies (500 Hz, 1 kHz, 2 kHz, 4 kHz, and 8 kHz) shown in FIG. When signals are input to the speakers 6 and 7 in the same phase, as shown by a solid line L1 in FIG. On the other hand, when signals are input to the speakers 6 and 7 in opposite phases, the directivity indicating the character shape “8” is obtained as indicated by the solid line L2 in FIG. In FIG. 8, the direction of “0 °” indicates the characteristic on the first sound emitting hole 11 side, and the direction of “180 °” indicates the characteristic on the second sound emitting hole 12 side.

  As shown in FIGS. 8A to 8E, when a sound like a ringtone that requires wide directivity is played, the function as a ringtone can be improved by ringing the speakers 6 and 7 in the same phase. . On the other hand, when sounding with only directivity in a certain direction, each speaker 6 and 7 is sounded in opposite phases, for example, by adjusting the signal input level and directing only in a certain direction. It is possible to easily control the performance.

  In addition, since the speaker device 1 outputs sound from both sides where the first speaker 6 and the second speaker 7 are arranged, the sound emitting hole on one side, the second sound emitting hole 17 of the case 9 is blocked. Even if it is, when the brake hole 13 is provided, the sound can be reproduced with no influence on the vibration of the diaphragm 6a of the first speaker 6 and little deterioration of the sound pressure. . The characteristics shown in FIGS. 7 and 8 are merely representative examples, and the characteristics change according to the size of the speaker to be used, the mounting position, the size of the sound emission hole of the speaker, the signal input level, and the like. By changing these conditions, the characteristics can be adjusted as appropriate.

  Although not shown, the mobile phone including the speaker device 1 includes a control circuit that controls a liquid crystal display panel, a communication circuit, and the like, and each of the first speaker 6 and the second speaker 7 is controlled by this control circuit. The input terminal is configured to control a state in which signals having the same phase are input and a state in which signals having opposite phases are input to each other.

  As described above, the speaker device 1 according to the present embodiment includes the first and second speakers 6, 7 arranged with the back sides facing each other, the first and second sound emitting holes 11, 12, and the braking hole 13. Each of the speakers 6 and 7 is configured to be able to control vibration independently. For this reason, the speaker device 1 performs characteristics (in accordance with various usage scenes) by performing control of inputting signals in the same phase and opposite phase to the speakers 6 and 7 and controlling the input level of the signals. Sound with sound pressure, sound quality) and directivity can be easily obtained.

  Further, the speaker device 1 is provided with first and second sound emitting holes 11 and 12 on the front side of the speakers 6 and 7, respectively, and one of the two sound emitting holes 11 and 12 is closed. Even so, it is possible to reduce the deterioration of the sound pressure by releasing the sound from the brake hole 13 common to the speakers 6 and 7.

  Also, according to the speaker device 1, the first and second speakers 6 and 7, which are relatively thin piezoelectric speakers, are arranged with their back sides facing each other, and the intervals at which the speakers 6 and 7 face each other are relatively long. By reducing the size, it is possible to improve sound pressure and sound quality only by requiring a relatively small space for mounting the speakers 6 and 7.

  In the manufacturing method of the speaker device 1 of the embodiment configured as described above, the support frame 8 with the speakers 6 and 7 having the input terminals 6c and 7c facing each other with a space between the back sides thereof. And a process of mounting. In addition, the manufacturing method includes a step of forming the first and second sound emitting holes 11 and 12 and the braking hole 13 in the support frame 8. In addition, this manufacturing method includes a step of mounting the support frame 8 inside the case 9 in which the auxiliary space 20 is provided.

  Next, another embodiment will be described with reference to the drawings. In addition, in the structure of the speaker apparatus of other embodiment, the same code | symbol is attached | subjected to the same member as the structure of the speaker apparatus 1 of embodiment mentioned above, and description is abbreviate | omitted.

As shown in FIG. 9, in the speaker device 2 of another embodiment, the positions of the first sound emitting hole 26 and the second sound emitting hole 27 are the first sound emitting hole 11 and the second sound emitting hole in the speaker device 1 described above. It is different from the position of the sound hole.
The first and second discharge holes 26 and 27 are provided through the support frame 8 in a direction perpendicular to the thickness direction of the speakers 6 and 7, and are respectively disposed on the same side surface of the support frame 8. .

  Similarly, the case 9 is provided with a first sound emission hole 31 at a position corresponding to the first sound emission hole 26 of the first speaker 6, and the second sound emission hole 32 is the second sound emission hole 26 of the second speaker 7. It is provided at a position corresponding to the sound emission hole 27.

  In the speaker device 2 configured as described above, the same effects as those of the above-described embodiment can be obtained. In addition, the basic configuration is as described above, but the signal to be input can be played in the same phase in the low frequency range of 1.3 kHz or less, and in the reverse phase in the middle and high frequency range of 1.3 kHz or higher. On the other hand, using a filter that can divide the band, control is performed so that the phase is input in the same phase in the band of 1.3 kHz or lower, and the reverse phase is input using a phase inverting amplifier or the like in the band of 1.3 kHz or higher. It may be configured as follows. According to this configuration, it is possible to sound the speakers 6 and 7 with the most excellent characteristics in the low frequency range, the mid-high frequency range, and the entire frequency range.

  In addition, the structure which divides | segments into a low-frequency range and a mid-high range with 1.3 kHz as a boundary is one structural example of this embodiment, Comprising: It is not limited to this frequency, A speaker shape, a case shape, a speaker Of course, it may vary depending on the shape or the like of the sound emitting hole, and may be set as appropriate.

  A mobile phone according to an embodiment in which the speaker device according to the embodiment configured as described above is mounted will be described with reference to the drawings.

  As shown in FIG. 10, the mobile phone 3 includes a display unit side body 41 in which a liquid crystal display panel 44 is disposed, and an operation unit side body 42 in which various operation keys 45 are disposed. The display unit side body 41 and the operation unit side body 42 are configured to be pivotably connected via a hinge part 43. The mobile phone 3 is mounted with the speaker device 1 of the embodiment. The display unit side body 41 includes a front side case 41 a on which the liquid crystal display plate 44 is disposed and a back side case 41 b that covers the back side of the liquid crystal display plate 44.

  As a configuration row in which the speaker device 1 is mounted on a mobile phone, for example, as shown in FIG. 11, the first sound emitting hole 16 is disposed in the front side case 41a of the display unit side case 41, and the rear side A configuration is adopted in which the second sound emitting holes 17 are arranged in the side housing 41b. The speakers 6 and 7 are arranged to face each other with a space 10 in the thickness direction of the display unit side body 41 (direction perpendicular to the display surface of the liquid crystal display panel 44). As in this configuration, in the mobile phone 3, the speaker device 1 is mounted in the front housing 41 a and the back housing 41 b so that the respective emission holes 16 and 17 are disposed, whereby a liquid crystal display The speaker device 1 can be mounted in a relatively small space with respect to the direction parallel to the display surface of the plate 44, and an increase in the size of the mobile phone 3 can be avoided.

  Similarly, in the mobile phone on which the speaker device 2 of the embodiment is mounted, the speakers 6 and 7 are arranged in the same direction as the configuration shown in FIG. In this configuration, the discharge holes 31 and 32 are respectively arranged on the side surfaces in the thickness direction of the display unit side body 41.

  Note that the mobile phone is not limited to the arrangement of the speaker devices 1 and 2 of the above-described embodiment, and the direction of each discharge hole with respect to the display unit side housing may be appropriately set as necessary. Of course, a configuration in which the speaker device is arranged in the operation unit side housing may be adopted.

It is a figure which shows the speaker apparatus of this embodiment. It is AA sectional drawing which shows the said speaker apparatus. It is AA sectional drawing which shows the state which input the signal of the same phase into the 1st speaker and the 2nd speaker. It is AA sectional drawing which shows the state which input the signal of the same phase into the 1st speaker and the 2nd speaker. It is AA sectional drawing which shows the state which input the signal of mutually opposite phase into the 1st speaker and the 2nd speaker. It is AA sectional drawing which shows the state which input the signal of mutually opposite phase into the 1st speaker and the 2nd speaker. It is a figure which shows the sound pressure frequency characteristic of the said speaker apparatus. It is a figure which shows the directivity when the signal of an in-phase and an antiphase is input into the 1st and 2nd speaker, respectively. It is AA sectional drawing which shows the speaker apparatus of other embodiment. 1 is a perspective view schematically showing a mobile phone according to an embodiment. It is a perspective view which shows typically the speaker apparatus mounted in the said mobile phone.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Speaker apparatus 6 1st speaker 6a Diaphragm 6b Drive part 6c Input terminal 7 2nd speaker 7a Diaphragm 7b Drive part 7c Input terminal 8 Support frame 10 Space 11 1st sound release hole 12 2nd sound release hole 13 Brake hole

Claims (12)

In a speaker device used in a portable electronic device,
A first speaker and a second speaker having a diaphragm, a drive unit that drives the diaphragm, and an input terminal for inputting a signal to the drive unit;
A support frame for covering and supporting each of the first speaker and the second speaker in a state of being opposed to each other with a space between the back side of the first speaker and the back side of the second speaker; With
The support frame includes a first sound emitting hole for emitting sound of the first speaker, a second sound emitting hole for emitting sound of the second speaker, the first speaker, and the second speaker. And a braking hole that brakes the diaphragm in communication with the space between the speaker device and the speaker device.   The first speaker and the second speaker are controlled to be in a state where a signal having the same phase is input to the input terminal of each speaker and in another state where signals having opposite phases are input to each other. The speaker device according to claim 1. A case for accommodating the support frame therein;
3. The speaker device according to claim 1, wherein an auxiliary space that communicates with the braking hole and adds a volume to the space is provided inside the case.   The first sound emitting hole and the second sound emitting hole are provided so as to penetrate the support frame in a direction orthogonal to the thickness direction of the first speaker and the second speaker. The speaker device according to any one of claims.   5. The speaker device according to claim 1, wherein a front side of the first speaker and a front side of the second speaker communicate with the outside.   The speaker device according to claim 1, wherein the first speaker and the second speaker are piezoelectric speakers.   A portable electronic device comprising the speaker device according to any one of claims 1 to 6.   And a control circuit that controls a state in which signals having the same phase are input to each of the input terminals of the first speaker and the second speaker and another state in which signals having opposite phases are input to each other. Item 8. A portable electronic device according to Item 7.   The portable electronic device according to claim 8, wherein the portable electronic device is a portable phone. In a method for manufacturing a speaker device used in a portable electronic device,
A first speaker and a second speaker having an input terminal for inputting a signal to a driving unit that drives the diaphragm are provided with a space between the back side of the first speaker and the back side of the second speaker. Mounting on a support frame that covers and supports each of the first speaker and the second speaker in a state of being opposed to each other;
A first sound emitting hole for emitting sound from the first speaker, a second sound emitting hole for emitting sound from the second speaker, the first speaker, and the second speaker in the support frame. Forming a braking hole for communicating with the space between and for braking the diaphragm;
A method for manufacturing a speaker device, comprising:   The method for manufacturing the speaker device according to claim 10, further comprising a step of mounting the support frame inside a case that is provided with an auxiliary space that communicates with the braking hole and adds a volume to the space. . In a method for controlling a speaker device used in a portable electronic device,
In the speaker device, a first speaker and a second speaker each having an input terminal for inputting a signal to a driving unit that drives a diaphragm are between the back side of the first speaker and the back side of the second speaker. Mounted on a support frame that covers and supports each of the first speaker and the second speaker in a state of being opposed to each other with a space therebetween, and the support frame emits sound of the first speaker. The first sound emitting hole, the second sound emitting hole for emitting the sound of the second speaker, and the space between the first speaker and the second speaker are connected to the space to brake the diaphragm. And a braking hole for
Controlling a state in which signals having the same phase are input to each of the input terminals of the first speaker and the second speaker and another state in which signals having opposite phases are input to each other Device control method.

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