PORTABLE TERMINAL DEVICE
`
`DOCUMENT ID DATE PUBLISHED
`
`JP 2011055300 A
`
`2011-03-17
`
`INVENTOR INFORMATION
`
`NAME
`
`CITY STATE ZIP CODE COUNTRY
`
`ISHIKAWA TAKEHISA N/A N/A
`
`ARAKI TATSUTO
`
`N/A N/A
`
`SAKASHITA HIROO N/A N/A
`
`MATSUDA HIROAKI N/A N/A
`
`HIZUKA HIDEHIKO N/A N/A
`
`SUZUKI TAKASHI
`
`N/A N/A
`
`MURAKAMI TAKAKI N/A N/A
`
`N/A
`
`N/A
`
`N/A
`
`N/A
`
`N/A
`
`N/A
`
`N/A
`
`N/A
`
`N/A
`
`N/A
`
`N/A
`
`N/A
`
`N/A
`
`N/A
`
`DATE FILED
`
`2009-09-02
`
`CPC CURRENT
`
`TYPE
`
`CPCI
`CPCI
`CPCI
`CPCI
`CPCA
`CPCA
`CPCA
`CPCA
`CPCA
`CPCA
`
`KWIC Hits
`
`Abstract
`
`CPC
`
`HO4 R 1/08
`HO4 M 1/035
`HO4 R 1/08
`HO4 M 1/035
`MOd R 2470/05
`Mod M 1/api4
`Mod R 2408/14
`MOd R 2470/05
`MH O4 FR 2400/14
`MOA A 1/O244
`
`DATE
`
`2013-01-01
`2013-01-01
`2013-01-01
`2013-01-01
`2013-01-01
`2013-01-01
`2013-01-01
`2013-01-01
`2013-01-01
`2013-01-01
`
`<P>PROBLEM TO BE SOLVED: To maintain the stability around an acoustic component, and prevent
`deterioration of acoustic characteristics. <P>SOLUTION: One endpart of an internal frame 330
`surrounding a microphone 320 is bonded to a substrate 310 by double-sided tapes 350a and 350b. A
`face 331 and a face 332 of the internal frame 330 are in proximity to a side face and an upperface of
`the microphone 320 respectively, around the microphone 320 to form a stowage part 360. Meanwhile,
`the other end part of the internal frame 330 is abutted on aninner wall face of a fixing casing 100 via
`cushions 340a and 340b, to form an acoustic portion 370 extending around an aperture 130 with a
`face 334 and a face 335. A through-hole 333 is provided in a base 335 of the acoustic portion 370, and
`the through-hole 333 guides a voice entering the acoustic portion 370 to a sound sensing portion 321
`of the microphone 320. <P>COPYRIGHT: (C)2011,JPO&INPIT
`
`Description
`
`

`

`TECHNICAL-FIELD
`
`The presentinvention relates to a mobile terminal device.
`
`BACKGROUND-ART
`
`In general, a mobile terminal device such as a mobile phone having an audio function includes
`acoustic components such as a microphone and a speaker. Usually, these acoustic components are
`provided inside the casing of the mobile terminal device, and collect sound from outside the casing
`through the opening formedin the casing or generate sound outside the casing. Or Thatis, for
`example, the microphone converts sound that enters the inside of the housing from an opening formed
`in the housing of the mobile terminal device into an electrical signal. For this reason, a favorable
`acoustic characteristic is acquired by sealing the space between an opening part and an acoustic
`component, and preventing the spreading| diffusion of the sound inside a housing | casing. In view of
`this, various configurations for improving the airtightness of the space have been studied and actually
`adopted around the acoustic component of the mobile terminal device.
`
`Specifically, for example, a cushion madeof an elastic material such as foamable resin or rubberis
`inserted between adjacent components around the microphoneof the mobile terminal device, and the
`opening provided in the housing and the microphone The sealing of the space between them may be
`improved. FIG. 7 is a diagram illustrating an example of a configuration that enhancesthe sealing of
`the space around the microphonebythe cushion.
`
`As shownin FIG. 7, the microphone 20 is attached to the substrate 10 and collects sound that enters
`from an opening 60 a formedin the housing 60. Here, in order to seal the space between the
`microphone 20 and the opening 60a, an internal frame 30 is provided, and cushions 40a and 40b are
`interposed between the microphone 20 andtheinternal frame 30, and the internal frame 30 Cushions
`70 a and 70bare interposed between the housings 60. The cushions 40a and 40b and the cushions
`70a and 70b are madeof, for example, foaming resin, and are deformed to some extent according to
`the pressure between the microphone 20 andthe inner frame 30 and the pressure between the inner
`frame 30 and the housing 60, respectively. The airtightness of the space between the microphone 20
`and the opening 60a is enhanced.
`
`Thus, rather than directly inserting the cushion between the microphone 20 and the housing 60, the
`thickness of each cushion can be reducedby providing the inner frame 30 and dividing the cushion
`into two stages. Stability between parts can be ensured. In the example shownin FIG. 7, since the
`shape of the microphone 20 is asymmetric, the spacer 50 is adjacent to the microphone 20, and the
`cushion 40 a is interposed between the microphone 20 and the spacer 50 and the internal frame 30.
`Thereby, it can prevent that the cushion 40a remove | deviates from the microphone 20, and can
`improve stability.
`
`CITATION-LIST
`
`PATENT-LITERATURE
`
`[1] JP 2007-96843 A
`
`DESCRIPTION-OF-EMBODIMENTS
`
`Hereinafter, an embodiment of a mobile terminal device disclosed in the present application will be
`describedin detail with reference to the drawings.In the following embodiment, a mobile phone will be
`described as an example of a mobile terminal device. Note that the present invention is notlimited to
`the embodiment.
`
`FIG. 1 is a perspective view showing an external appearance of a mobile terminal device according
`to an embodiment. As shownin FIG. 1, the mobile terminal device according to the present
`embodimentis a foldable mobile phone having a fixed housing 100 and a movable housing 200. The
`stationary housing 100 has an operation key part 110 and an opening 120. The movable casing 200is
`
`

`

`attached to the fixed casing 100 so asto berotatable, and includes a display unit 210 and an opening
`220. The surface provided with the operation key unit 110 and the display unit 210 illustrated in FIG. 1
`is a surface that contacts the user when the user makesa call, and is hereinafter referred to as a “front
`surface”. On the other hand, the rear surface of the surface provided with the operation key unit 110
`and the display unit 210 is hereinafter referred to as “rear surface”.
`
`The operation key unit 110 accepts user input operations. Specifically, the operation key unit 110
`receives, for example, an input operation of a telephone number of a call destination or an input
`operation of start or end of a call.
`
`The opening 120 is a through hole that communicates with a microphone provided on the front side
`inside the fixed housing 100. That is, the speech voice uttered by the userenters the inside of the
`fixed casing 100 through the opening 120 andis collected by the microphone provided on the front
`side. Note that the mobile terminal device according to the present embodiment has a double
`microphonestructure, and one microphoneis provided on eachofthe front side and the rear side.
`With such a double microphonestructure, for example, ambient noise can be reducedduring a call.
`
`The display unit 210 includesa liquid crystal panel, for example, and displays various information.
`Specifically, the display unit 210 displays, for example, a telephone numberinput by operating the
`operation key unit 110.
`
`The opening 220is a through hole that communicates with a receiver provided inside the movable
`housing 200. That is, a receiver that generates a received voice is provided inside the movable
`housing 200, and the voice generated by the receiver can be heard from the opening 220.
`
`FIG. 2 is a perspective view showing a rear side appearanceof the portable terminal device
`according to the present embodiment. As shownin FIG. 2, the opening 130, the fingerprint sensorunit
`140, and the camera unit 150 are disposed on the rear surface of the fixed-side housing 100. An
`illumination unit 230 is disposed on the rear surface of the movable housing 200.
`
`The opening 130 is a through-hole that communicates with a microphone provided on the rear
`surface side of the fixed-side housing 100. Thatis, the uttered voice uttered by the user enters the
`inside of the fixed housing 100 not only from the opening 120 described abovebut also from the
`opening 130 andis collected by the microphone provided on the rear side. The internal configuration
`near the opening 130 of the fixed housing 100 will be described in detail later.
`
`Thefingerprint sensor unit 140 includes a fingerprint sensor for user authentication. Thatis, the
`fingerprint sensorunit 140 reads the user's fingerprint to identify the user, and determines whether or
`not the mobile terminal device can be used Since the fingerprint
`* included in the
`
`rianunit 140 is attached to the rear«
`= side of the substrate in the same mannerasthe
`
`
`microphone provided on the rear surface side of the fixed side housing 100, the fixed side housing 100
`and the substrate according to the thicknessof the fingerprint sensor. The distance of is adjusted. As a
`result, the distance between the rear microphone and the opening 130is larger than the distance
`betweenthe front microphone and the opening 120.
`
`The camera unit 150 includes an imaging camera. The cameraincludedin the camera unit 150 is a
`componenthaving a relatively large size, and the thickness of the fixed housing 100 is defined by the
`thickness of the camera. Thatis, the thickness of the fixed-side housing 100 cannot be madethinner
`than the camera provided in the camera unit 150.
`
`Theillumination unit 230 illuminates aslight is emitted from, for example, an LED (Light Emitting
`Diode). Thatis, the illumination unit 230 illuminates with a predetermined pattern or color for notifying
`the user of an incomingcall, for example, at the time of the incoming call.
`
`FIG. 3 is a diagram schematically showing a cross section taken alongline Il of FIG. That is, FIG. 3
`showsa cross section of the stationary housing 100 taken alongline II passing through the opening
`130. In this section, a substrate 310, a microphone 320, an inner frame 330, and cushions 340a and
`340b are shown.
`
`

`

`The substrate 310 is disposed at a position corresponding to the thicknessof the fingerprint sensor
`141 included in the fingerprint sensor unit 140, and is disposedcloserto the front surface than the rear
`surface of the fixed housing 100. Thatis, the distance between the substrate 310 and the rear surface
`of the fixed housing 100 is greater than the distance betweenthe substrate 310 and the front surface
`of the fixed housing 100.
`
`The microphone 320 is disposed on the rear surface of the substrate 310 and collects sound that
`enters the inside of the fixed housing 100 from the opening 130. At this time, the microphone 320 picks
`up soundtransmitted through the space sealed by the internal frame 330 and the cushions 340a and
`340b. Therefore, the acoustic characteristics of the microphone 320 are kept good.
`
`The internal frame 330 is bonded to the substrate 310 with, for example, a double-sided tape, and
`forms a storage portion that stores the microphone 320 in a sealed mannerwith the substrate 310.
`The sound part which makes the sound which entered the inside sound appropriately is formed.
`Further, the inner frame 330 is formed with a through hole that guides the sound that has entered the
`acoustic unit to the storage unit, and the sound that has entered the inside of the stationary housing
`100 reaches the sound sensing unit of the microphone 320. ing. That is, the inner frame 330 forms an
`audio path between the opening 130 and the microphone 320. The structure of the internal frame 330
`will be described in detail later.
`
`The cushions 340 a and 340 b are inserted between the inner frame 330 andthe innerwall surface of
`the stationary housing 100, and seal the acoustic part formed by the inner frame 330, thereby opening
`the stationary housing 100 from the opening 130. Prevents the spread of voice that has entered the
`interior of the. That is, the cushions 340a and 340b are madeof an elastic body such as foamable
`resin, for example, and are deformed by the pressure betweenthe outer periphery surrounding the
`acoustic part of the internal frame 330 and the inner wall surface of the fixed housing 100, and And the
`fixed casing 100 are sealed. In FIG. 3, two cushions 340a and 340b are shown, but these are cross-
`sectional shapesat two locations of one cushion. Thatis, this cushion is disposed so as to surround
`the opening 130.
`
`As described above, in the present embodiment, the periphery of the microphone 320is directly
`sealed by the storage portion of the internal frame 330 bonded to the substrate 310, and the space
`betweentheinternal frame 330 and the inner wall surface of the stationary housing 100 is between
`Cushions 340a and 340bare inserted. Therefore, only one cushionis required to impair the stability
`between components,and additional components such as spacers for ensuring stability are not
`required, and the numberof parts and work man-hours can be reduced while maintaining stability.it
`can. At the sametime, the airtightness around the microphone 320 can be ensured, and the
`deterioration of the acoustic characteristics can be prevented.
`
`Next, the configuration around the microphone 320 according to the present embodimentwill be
`described more specifically with reference to FIG. 4 is an enlarged view showing a section taken along
`line II-Il in FIG. As shownin FIG. 4, a microphone 320 having a sound sensing unit 321 is disposed on
`a substrate 310, and one end of an internal frame 330 surrounding the microphone 320 is bonded to
`the substrate 310 with double-sided tape 350a, 350b. As described above, since the substrate 310
`and the internal frame 330 are bonded to each otherby the double-sided tapes 350 a and 350 b, the
`space between the substrate 310 and the internal frame 330 is sealed, and sound doesnotdiffuse
`around the microphone 320. At the sametime, the positional deviation between the substrate 310 and
`the internal frame 330 does notoccur, and the stability between components can be ensured.
`
`Further, since the other end portion of the inner frame 330is in contact with the inner wall surface of
`the stationary housing 100 via the cushions 340a and 340b, the space betweenthe inner frame 330
`and the inner wall surface of the stationary housing 100 is hermetically sealed. Thus, the sound
`entering the inside of the fixed housing 100 from the opening 130is not diffused. Therefore, the sound
`that enters the inside of the fixed housing 100 from the opening 130 is a space formedbythe inner
`wall surface of the fixed housing 100, the cushions 340a and 340b, the internal frame 330, the double-
`sided tapes 350a and 350b, and the substrate 310. The acoustic characteristics of the microphone
`320 can be improved without leaking outside.
`
`

`

`Further, the shape ofthe internal frame 330 will be described in detail. Around the microphone 320,
`the surface 331 and the surface 332 of the internal frame 330 are close to the side surface and the top
`surface of the microphone 320 to form the storage unit 360. Thatis, the storage unit 360 has a shape
`that covers the periphery of the microphone 320, and prevents the soundfrom diffusing around the
`microphone 320.
`
`On the other hand, in the vicinity of the opening 130 of the fixed housing 100, an air chamber
`extending around the opening 130 is formed by the surface 334 and the surface 335, andthis air
`chamberservesasthe acoustic unit 370. That is, the sound that has entered the inside of the fixed
`housing 100 from the opening 130 is appropriately sounded by the acoustic unit 370, and the acoustic
`characteristics are improved. A through hole 333 is provided in the bottom surface 335 of the acoustic
`unit 370, and the through hole 333 communicateswith the storage unit 360.
`
`In the storage unit 360, the through hole 333 is opened near the sound sensing unit 321 of the
`microphone 320, and the sound that has entered the acoustic unit 370 is guided to the sound sensing
`unit 321. In addition, since the surface 331 and the surface 332 forming the storage portion 360 are
`close to the microphone 320 as described above, the diffusion of the sound guided by the through hole
`333 around the sound sensing portion 321 is minimized. can do. As a result, the microphone 320 can
`reliably collect the sound that has entered the inside of the fixed housing 100 from the opening 130. In
`the present embodiment, since the microphone 320 is described as an example of the acoustic
`component, the through-hole 333 is opened near the sound sensing unit 321. For example, a speaker
`is used as the acoustic component. When provided, the through-hole 333 is opened near the sound
`producing portion of the speaker.
`
`Next, the internal configuration of the mobile terminal device according to the present embodiment
`will be described with reference to FIGS. FIG. 5 is an assembly diagram showing the configuration
`around the microphonefrom the front side, and FIG. 6 is an assembly diagram showing the
`configuration around the microphonefrom the rearside.
`
`As shownin FIG. 5 and FIG. 6, the inner frame 330 is sandwiched between the substrate 310 on the
`front side and the casing caseincluding the fingerprint sensor unit 140 and the camera unit 150. The
`fingerprint sensor 141 is integrated with the internal frame 330, and the camera 151 is integrated with
`the substrate 310. The fingerprint sensor 141 is opposedto the fingerprint sensor unit 140 of the
`housing case, and the camera 151 is opposed to the camera unit 150 of the housing case.
`
`A double-sided tape 350is affixed to the substrate 310 side of the internal frame 330, and the internal
`frame 330 is bonded to the substrate 310 by the double-sided tape 350. Thereby, in the storage part
`360 formed in substantially the same shape as the microphone 320 attachedto the substrate 310, the
`space between theinternal frame 330 and the substrate 310 is sealed, and diffusion of sound around
`the microphone 320 is prevented. Can do.
`
`Anelliptical cushion 340 is disposed on the innerwall surface of the housing caseat a position
`surrounding the opening 130. The cushion 340 is bondedto the innerwall surface of the housing case
`by, for example, a double-sided tape. Theelliptical shape of the cushion 340 correspondsto the shape
`of the acoustic part 370 of the inner frame 330, and the sealing of the acoustic part 370 is ensured by
`the cushion 340. Thatis, the side wall including the surface 334 (see FIG. 4) of the acoustic unit 370
`has anelliptic cylinder shape, and the cushion 340is provided so asto close the periphery of the
`bottom surface ofthe elliptic cylinder shape. Then, whenthe side wall of the acoustic part 370 comes
`into contact with the cushion 340, there is no gap in the acoustic part 370 except for the opening 130
`and the through hole 333 provided in the bottom surface 335 of the acoustic part 370, and the acoustic
`part 370 enters from the opening part 130. Can be prevented from spreading.
`
`As described above, according to the present embodiment, a space having substantially the same
`shape as the microphoneis formed by the substrate to which the microphoneis attached and the
`internal frame bondedto the substrate by the double-sided tape, and the microphoneis formed in the
`formed space. And a cushionis interposed betweenthe inner frame and the stationary housing. For
`this reason, it is possible to guide the sound entering the inside of the fixed side housing from the
`
`

`

`opening formedin the fixed side housing to the microphone without diffusing to the surroundings.
`Further, the use of the cushion for ensuring the sealing property can be suppressed to the minimum,
`and the positional deviation of the components can be prevented. As a result,it is possible to prevent
`deterioration of acoustic characteristics while maintaining stability between components around the
`microphone.
`
`In the above embodiment, the foldable mobile phone has been described. However, the mobile
`phoneis notlimited to the foldable type, and a slide type in which the movable side body slides with
`respect to the fixed side case, or a case in which the caseis provided. The above-described
`configuration can also be applied to a straight-type mobile phonethatis not divided.
`
`In the above-described embodiment, the configuration in which the periphery of the microphoneis
`sealed has been described. However, for example, a similar configuration can be applied between the
`speaker and the opening of the housing. Further, the same configuration can be applied to, for
`example, an IC recorder other than the mobile phone, and can be widely applied to mobile terminal
`devices having a voice function.
`
`Regarding the above-described embodiment, the following additional notes are disclosed.
`
`(Appendix 1) a housing in which an openingis formed;
`
`A substrate disposed inside the housing and to which an acoustic componentis attached;
`
`Accushion memberdisposed around the opening of the inner wall surface of the housing;
`
`And having an adjacent surface close to the surface of the acoustic component, one end near the
`adjacent surface being bonded to the substrate, and the other end contacting the inner wall surface of
`the housing via the cushion member, and the opening And a frame memberthat forms an audio path
`between the unit and the acoustic component.
`
`(Appendix 2) The frame memberis
`
`The portable terminal device according to appendix 1, wherein the portable terminal device is adhered
`to the substrate by a double-sided tape.
`
`(Appendix 3) The cushion memberis
`
`The portable terminal device according to appendix 1, wherein the portable terminal device is adhered
`to the inner wall surface of the housing by a double-sided tape.
`
`(Appendix 4) The frame memberis
`
`An acoustic part that forms an air chamber around the opening by contacting the inner wall surface of
`the housing via the cushion member;
`
`Anda storage portion for storing the acoustic component by connecting the vicinity of the proximity
`surface to the substrate through a through hole formed in a bottom surface of the acoustic portion. The
`mobile terminal device according to 1.
`
`(Supplementary Note 5) The storage unit
`
`The portable terminal device according to appendix 4, wherein the periphery of the acoustic
`componentis sealed except for the through hole that opens near the sound sensing portion provided
`in the acoustic component.
`
`(Appendix 6) The storage unit
`
`The portable terminal device according to appendix 4, wherein the periphery of the acoustic
`componentis sealed except for the through-hole that opens near the sounding portion provided in the
`
`

`

`acoustic component.
`
`(Appendix 7) The cushion memberis
`
`The mobile terminal device according to appendix 1, wherein the mobile terminal device is made of a
`foamable resin that is deformed by pressing.
`
`REFERENCE-SIGNS-LIST
`
`DESCRIPTION OF SYMBOLS100 Fixed side case 110 Operation key part 120, 130 Opening part 140
`Fingerprint sensor part 150 Camera part 200 Movable side case 210 Display part 220 Opening part
`230 Illumination part 310 Substrate 320 Microphone 321 Sound sensing part 330 Internal frame 340
`Cushion 350 Both sides Tape 360 Storage unit 370 Sound unit
`
`DRAWING DESCRIPTION
`
`[1]FIG. 1 is a perspective view showing an appearanceofa front side of a portable terminal device
`according to an embodiment. [2]FIG. 2 is a perspective view showing a rear side appearanceof the
`mobile terminal device according to the embodiment. [3]FIG. 3 is a diagram schematically showing a
`cross section taken alongline II of FIG. [4]4 is an enlarged view showing a section taken alonglineII-II
`in FIG. [5]FIG. 5 is an assembly diagram showing the configuration around the microphone according
`to the embodimentfrom the front side. [6]FIG. 6 is an assembly view showing the configuration around
`the microphone according to the embodimentfrom the rearside. [7]FIG. 7 is a cross-sectional view
`showing a configuration example around the microphone.
`
`Claims
`
`A housing in which an opening is formed;
`
`A substrate disposed inside the housing and to which an acoustic componentis attached;
`
`Accushion memberdisposed around the opening of the inner wall surface of the housing;
`
`And having an adjacent surface close to the surface of the acoustic component, one end near the
`adjacent surface being bonded to the substrate, and the other end contacting the inner wall surface of
`the housing via the cushion member, and the opening And a frame memberthat forms an audio path
`between the unit and the acoustic component.
`
`The frame member is
`
`The portable terminal device according to claim 1, wherein the portable terminal device is adhered to
`the substrate by a double-sided tape.
`
`The frame member is
`
`An acoustic part that forms an air chamber around the opening by contacting the inner wall surface of
`the housing via the cushion member;
`
`Anda storage portion for storing the acoustic component by connecting the vicinity of the proximity
`surface to the substrate through a through hole formed in a bottom surface of the acoustic portion.
`Item 2. The mobile terminal device according to Item 1.
`
`The storage unit
`
`The portable terminal device according to claim 3, wherein the periphery of the acoustic componentis
`sealed except for the through hole that opens near a sound sensing portion providedin the acoustic
`component.
`
`The cushion member is
`
`

`

`The mobile terminal device according to claim 1, wherein the mobile terminal device is made of
`foamable resin that is deformed by pressing.
`
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