JP2006166029A - Flat panel loudspeaker mounting structure and mounting method in portable electronic device, and portable electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flat panel loudspeaker mounting structure and mounting method in a portable electronic device which enable waterproofing function and dustproofing function to be surely improved without obstructing the vibration of a diaphragm serving also as a screen member, and to provide the portable electronic device. <P>SOLUTION: The flat panel loudspeaker mounting structure 36 is roughly constituted in such a manner that the diaphragm 31 is attached to an actuator module 32 in an abutted state at a prescribed part so as to transmit the vibration and it is attached to a front case 12 through a frame-like gasket member 33 composed of silicone rubber for instance. The gasket member 33 is adhered respectively to the diaphragm 31 and the mounting surface 17m of the front case 12 both through a frame-like double-sided adhesive sheet. Thus, the gasket member 33 supports the diaphragm 31 without obstructing the vibration of the diaphragm 31 and prevents the intrusion of moisture or the like to the inside of an upper case body 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mounting structure and mounting method of a flat panel speaker in a portable electronic device, and a portable electronic device. For example, a folding type using a screen member that protects a display panel as a diaphragm for emitting sound. The present invention relates to a mounting structure and mounting method for a flat panel speaker in a portable electronic device in which a diaphragm that also serves as a screen member is attached to a housing, and the portable electronic device.

In recent years, portable electronic devices such as mobile phones have become widespread due to the high convenience that they can be used on the move or on the go. In particular, a foldable mobile phone that can be freely opened and closed is supported by many users because it can be stored compactly.
Furthermore, the folding which comprised so that one housing | casing could be freely rotated with respect to the other housing | casing also around the rotating shaft orthogonal to the rotating shaft for opening and closing using a biaxial hinge part. Type mobile phones are also in practical use.

  As shown in FIGS. 11 and 12, such a cellular phone 101 includes an upper unit 102 and a lower unit 103 that are coupled to each other by a biaxial hinge unit 104, and an upper casing 105 of the upper unit 102. Are equipped with a receiving unit 106 for outputting received voice and a display unit 107 made of a liquid crystal display device, and a lower casing 108 of the lower unit 103 has an operation unit 109 made up of various operation keys and the like, A transmitter 110 for inputting voice and an audio output unit 111 having a speaker are mounted.

  As shown in FIG. 13, the display unit 107 includes a liquid crystal display panel 112 and a backlight device that gives illumination light to the liquid crystal display panel 112, and these are held by a holding frame 113 and are attached to the upper housing. It is mounted in the body 105. Further, a screen member 114 for protecting the liquid crystal display panel 112 is bonded to a front case 115 constituting the upper housing 105 using a double-sided adhesive sheet 116.

By the way, as the cellular phone 101, not only an original telephone call function but also a data communication function capable of browsing homepages by sending / receiving e-mails or connecting to the Internet has become widespread.
In such a mobile phone 101, for example, when a user downloads a program downloaded from a site and enjoys a game or the like, the casing is opened to listen to the sound while watching the screen of the display unit 107. It will be used in the state.

However, when trying to view the display screen of the display unit 107 with the display screen folded toward the front and making it compact, the speaker of the audio output unit 111 is hidden and the sound cannot be heard sufficiently. There was a problem.
Also, during a call, with the housing open, the receiver 106 is placed on the ear to listen to the received voice. However, since the sound hole is relatively small, it is difficult to make sure that the sound is applied. It was out of the hole position, the volume was insufficient, and the sound was unclear.
Thus, recently, a technique for using a screen member for protecting a display panel as a diaphragm for emitting sound in a display of a personal computer has been put into practical use, and this technique can be applied to a mobile phone. (Refer to Non-Patent Document 1, for example, regarding audio output from the display screen.)

“Nikkei Business November 1, 2004 issue”, Nikkei Business Publications, November 1, 2004, p. 90

The problem to be solved is that when the technology used in the display of a personal computer is applied to a mobile phone, moisture enters the inside of the housing through the gasket member that supports the diaphragm, causing a malfunction of the device. And the risk of failure increases.
That is, since the personal computer is not supposed to be used outdoors, the gasket member that supports the diaphragm that also serves as the screen member focuses on supporting the diaphragm so as not to disturb the vibration of the diaphragm. Therefore, if it has a dustproof function, a sufficient material is selected and it does not have a waterproof function. For this reason, the diaphragm support structure that also serves as the screen member of the prior art cannot be applied as it is.

  The present invention has been made in view of the above circumstances, and has a flat panel speaker mounting structure in a portable electronic device that can reliably improve the waterproof function and the dust-proof function without disturbing the vibration of the diaphragm, and An object is to provide a mounting method and a portable electronic device.

  In order to solve the above problems, the invention according to claim 1 is a mounting structure of a flat panel speaker in which a flat panel speaker that oscillates a diaphragm by an actuator to emit sound waves is attached to a casing of a portable electronic device. The diaphragm is attached to the casing in which the opening is formed so as to cover the opening through a gasket member bonded to the back surface of the diaphragm, and the gasket member is impermeable to water. It is characterized by comprising a flat elastic member.

  According to a second aspect of the present invention, there is provided a flat panel speaker mounting structure in the portable electronic device according to the first aspect, wherein the gasket member prevents liquid from entering the casing through the opening. And is bonded to the edge of the opening of the housing.

  According to a third aspect of the present invention, there is provided a flat panel speaker mounting structure in the portable electronic device according to the first or second aspect, wherein the gasket member is bonded to the diaphragm, According to the vibration, the diaphragm is supported while deforming at least along the thickness direction.

  According to a fourth aspect of the present invention, there is provided a flat panel speaker mounting structure in the portable electronic device according to the first, second, or third aspect, wherein the gasket member is made of rubber.

  According to a fifth aspect of the present invention, there is provided the flat panel speaker mounting structure in the portable electronic device according to the fourth aspect, wherein the gasket member is made of silicone rubber.

  A sixth aspect of the present invention relates to a flat panel speaker mounting structure in the portable electronic device according to any one of the first to fifth aspects, wherein the actuator includes a piezoelectric element, and the diaphragm It is characterized in that it is in contact with a predetermined part.

  A seventh aspect of the invention relates to a flat panel speaker mounting structure in the portable electronic device according to any one of the first to sixth aspects, wherein the portable electronic device displays character information or image information. Display means, and the diaphragm is made of a transparent member, and also serves as a screen member for protecting the display screen of the display means.

  The invention according to claim 8 relates to the flat panel speaker mounting structure in the portable electronic device according to any one of claims 1 to 7, wherein the gasket member is a frame-like member that supports the diaphragm. Each having a first seal surface and a second seal surface disposed on the diaphragm side and the edge side of the opening, respectively, and the second seal surface surrounds the opening, It is characterized by being in contact with the mounting surface of the edge.

  A portable electronic device according to a ninth aspect of the present invention relates to a flat panel speaker mounting structure in the portable electronic device according to the eighth aspect, wherein the gasket member has the first sealing surface with the vibration. The diaphragm is supported by abutting a substantially square annular region on the back surface of the plate.

  A tenth aspect of the present invention relates to a mounting structure of a flat panel speaker in the portable electronic device according to any one of the first to ninth aspects, and the gasket members both have a frame-like double-sided pressure-sensitive adhesive sheet interposed therebetween. In this case, they are respectively bonded to the diaphragm and the casing.

  The invention according to claim 11 relates to the mounting structure of the flat panel speaker in the portable electronic device according to claim 10, wherein the double-sided pressure-sensitive adhesive sheet has a waterproof function.

  A twelfth aspect of the present invention relates to a flat panel speaker mounting structure in the portable electronic device according to any one of the first to eleventh aspects of the present invention, and prevents dust from entering inside the gasket member. A frame-shaped dustproof cushion member is arranged.

  According to a thirteenth aspect of the present invention, a portable electronic device includes the flat panel speaker mounting structure in the portable electronic device according to any one of the first to twelfth aspects.

  According to a fourteenth aspect of the present invention, there is provided a flat panel speaker mounting method for mounting a flat panel speaker that emits sound waves by vibrating a diaphragm using an actuator to a casing of a portable electronic device having an opening. In particular, the diaphragm having the gasket member made of a non-water-permeable flat elastic member adhered to the back surface thereof is prepared, and the gasket member is adhered to the edge of the opening to cover the diaphragm. As described above, the liquid crystal is attached to the casing via the gasket member to prevent liquid from entering the casing from the opening.

  According to the configuration of the present invention, since the diaphragm is attached to the housing via the gasket member made of a non-permeable flat elastic member, the diaphragm is reliably waterproofed without disturbing the vibration of the diaphragm. And dustproofness can be improved.

  By attaching the diaphragm to the housing through a gasket member made of a non-permeable flat elastic member, the object of reliably improving the waterproof and dustproof without impeding the vibration of the diaphragm was realized. .

  FIG. 1 is an exploded perspective view of an upper unit of a mobile phone according to an embodiment of the present invention, viewed from the surface side, and FIG. 2 is an exploded perspective view showing the configuration of the upper unit. FIG. 4 is an exploded perspective view showing the configuration of the upper unit, FIG. 3 is a block diagram showing the configuration of the mobile phone, and FIG. 4 is the configuration of the upper unit. 5 is a cross-sectional view taken along the line AA in FIG. 4, FIG. 6 is a cross-sectional view taken along the line BB in FIG. 4, and FIG. 7 is an enlarged view of a portion C in FIG. 8 is a block diagram showing the configuration of the audio output unit of the mobile phone, FIG. 9 is a plan view showing the configuration of the gasket member of the audio output unit, and FIG. It is a bottom view which shows the state in which the gasket member and the actuator module were attached to the diaphragm.

  The mobile phone 1 of this example has a foldable casing, and has a data communication function that allows a homepage to be viewed by connecting to the Internet, for example, in addition to an original call function. As shown in FIGS. 1 to 3, the upper unit 2 and the lower unit 3 can be opened and closed with respect to each other, and one unit is also disposed around the rotation axis perpendicular to the rotation axis for opening and closing. The two-axis hinge part 4 is coupled to each other so as to be rotatable with respect to the unit.

As shown in FIGS. 1 to 3, the upper unit 2 drives, for example, an audio output unit 7 that outputs a received voice and an audio output unit 7 to an upper case 6 that constitutes a foldable flat case. For example, a piezoelectric drive unit 8, a liquid crystal display device, for example, a display unit 9 for displaying a function setting screen, a standby screen, etc. It is implemented and roughly configured.
The upper housing 6 is made of a die-cast product made of, for example, magnesium alloy, and has a front case 12 that constitutes the front side and a rear cover 13 that constitutes the back side, and the combined front case 12 and rear cover 13 are combined. The sound output unit 7, the display unit 9, and the light emitting unit 11 are housed or assembled in an assembled state by fitting or tightening with a fixing tool such as a female screw or a male screw.

The front case 12 is roughly molded into a shape in which a side wall portion 16 is erected on the periphery of a rectangular flat plate portion 15 in which an opening portion 14 for exposing a display screen of the liquid crystal display panel 41 is formed in the center portion. Yes.
Of the flat plate portion 15, the upper surface of the edge portion 17 of the opening 14 projecting laterally (inner side) from the inner wall surface of the side wall portion 16 is placed on which the diaphragm 31 is placed via a gasket member 33 described later. The placement surface is 17 m.
The rear cover 13 is roughly molded into a shape in which a side wall portion 19 is erected on the periphery of a rectangular flat plate portion 18.

  As shown in FIG. 3, the lower unit 3 includes a control unit 22 that controls each component of the mobile phone body, and a process executed by the control unit 22. A storage unit 23 for storing programs, various data, and the like; a wireless communication unit 26 that transmits and receives wireless radio waves via the antenna 25 and performs calls and data communication according to a predetermined protocol; and numbers and characters An operation unit 27 composed of a large number of various operation keys, etc., a transmission unit 28 composed of a microphone for inputting a transmission voice, and a ringer generation unit 29 for generating a ring tone when receiving an incoming call. Is implemented and roughly configured.

  As shown in FIGS. 1 to 10, the audio output unit 7 is made of, for example, a transparent member made of acrylic resin, and includes a diaphragm 31 that also serves as a screen member that protects the liquid crystal display panel 41, and a diaphragm 31 that includes a piezoelectric element. Actuator module 32 that radiates sound waves by oscillating and a flat frame-like water-impermeable gasket member 33 made of, for example, silicone rubber for preventing foreign matter such as dust and moisture from entering the inside of the upper housing 6. And a frame-shaped dustproof cushion member 34 that is disposed inside the gasket member 33 and is made of, for example, urethane foam to prevent dust from entering inside and prevent the dust from adhering to the surface of the liquid crystal display panel 41. It is prepared. Here, the diaphragm 31 and the actuator module 32 constitute a flat panel speaker 35.

The actuator module 32 receives the amplified drive signal via the piezoelectric drive unit 8 controlled by the control unit 22, converts the drive signal as an electrical signal into an acoustic signal, and vibrates the diaphragm 31.
In this example, the actuator module 32 is bonded to a predetermined portion on the back surface of the diaphragm 31 using, for example, a double-sided adhesive tape. A cushion member 45 for protecting a flexible printed wiring board (hereinafter referred to as FPC (Flexible Printed Circuit)) is disposed on the back side of the actuator module 32.

In addition, a light shielding material is applied to the outer region corresponding to the display screen region of the diaphragm 31. The anti-vibration cushion member 34 is located on the inner side of the gasket member 33 (in this example, the side portion is surrounded by the inner wall surface 33a of the gasket member 33, the upper portion is covered by the diaphragm 31, and the lower portion is a liquid crystal display panel. 41 in the gap space where 41 is arranged) so as to surround the peripheral edge of the display screen area.
In this example, the diaphragm 31 is positioned so that a predetermined corner portion 31m of the side wall surface 31a abuts on a corresponding corner portion 16a formed on the side of the opening 14 of the side wall portion 16 of the front case 12. Then, it is arranged on the mounting surface 17m via the gasket member 33.
As shown in FIGS. 6 and 7, the gasket member 33 is bonded to the diaphragm 31 and the mounting surface 17 m of the front case 12 through frame-shaped double-sided adhesive sheets 37 and 38, respectively.

As shown in FIG. 7, the double-sided pressure-sensitive adhesive sheet 37 (38) has an acrylic adhesive layer 37m (38m) and a silicon adhesive layer 37n (38n) formed on both sides of a base 37a (38a) made of PET. It has become.
Thus, the diaphragm 31 is attached to the front case 12 via the gasket member 33.
The gasket member 33 is made of, for example, silicone rubber having excellent weather resistance. The silicone rubber is selected from polydimethyl silicone rubber, methyl vinyl silicone rubber, methyl phenyl silicone rubber, fluorosilicone rubber and the like.
The gasket member 33 has an upper seal surface 33 b and a lower seal surface 33 c disposed on the diaphragm 31 side and the edge side of the opening 14, and the upper seal surface 33 b is disposed on the diaphragm 31 via a double-sided adhesive sheet 37. In the bonded state, according to the vibration of the diaphragm 31, the diaphragm 31 is supported while being relatively easily deformed along at least the thickness direction, and the lower seal surface 33c surrounds the opening 14 so that the lower seal surface 33c surrounds the opening 14. It is bonded to the placement surface 17m via a double-sided pressure-sensitive adhesive sheet 38 and prevents moisture from entering the upper housing 6 from the opening 14 in particular.
The gasket member 33 is set to have a slightly smaller outer dimension than the diaphragm 31.

The flat panel speaker mounting structure 36 of this example is a frame-shaped gasket member made of, for example, silicone rubber, in which the diaphragm 31 is attached in contact with the actuator module 32 at a predetermined portion so that vibration is transmitted. It is schematically configured by being attached to the front case 12 via 33.
Here, the gasket member 33 is bonded to the diaphragm 31 and the mounting surface 17m of the front case 12 through frame-shaped double-sided adhesive sheets 37 and 38, respectively.
Thereby, the gasket member 33 supports the diaphragm 31 without disturbing the vibration, and prevents moisture and the like from entering the upper housing 6.

The display unit 9 is disposed on the inner surface of the upper housing 6 and has, for example, a transmissive liquid crystal display device. The liquid crystal display device includes a liquid crystal display panel 41, a backlight device that provides illumination light to the liquid crystal display panel 41, a drive circuit that drives the liquid crystal display panel 41, and a holding frame 42 that holds the liquid crystal display panel 41 and the backlight device. And has.
The liquid crystal display panel 41 is a transmissive liquid crystal display panel having a TFT (Thin Film Transistor) structure, for example, and has a TFT substrate on which a large number of TFTs and transparent pixel electrodes are formed, and a gap of several [μm] from the TFT substrate. A counter substrate fixed opposite to each other and having a colored layer (color filter) formed thereon, a liquid crystal layer sealed in the gap, a TFT substrate, and a pair of deflection plates disposed outside the counter substrate. Have.

The backlight device includes a light source unit composed of a plurality of LEDs as a point light source, a light guide plate that receives light emitted from the light source unit, and emits planar illumination light toward the liquid crystal display panel 41. An optical member group including a diffusion sheet for correction and a prism sheet for condensing illumination light incident from the light guide plate side. The liquid crystal display panel 41 is irradiated with illumination light from the back surface side to display a liquid crystal display. The observer visually recognizes the light transmitted through the panel 41.
An optical member group is disposed on the front surface side (the diaphragm 31 side) of the holding frame 42, and the optical member group is sandwiched between the holding frame 42, for example, via a frame-like double-sided adhesive sheet. A liquid crystal display panel 41 is fixed.

On the back side (rear cover side) of the holding frame 42 is attached a wiring board 43 in which a predetermined circuit pattern is formed on an insulating board and electronic components are mounted. The wiring board 43, the liquid crystal display panel 41, and the light source Each unit is electrically connected via an FPC.
The liquid crystal display panel 41, the light source unit, the wiring board 43, and the like are pressed from above and below using a fixture by the front case 12 and the rear cover 13 constituting the upper housing 6 while being attached to the holding frame 42. Thus, it is stored in the upper housing 6.

The control unit 22 includes a CPU (Central Processing Unit) and the like, executes various processing programs stored in the storage unit 23, and configures each unit using various registers and flags secured in the storage unit 23. Control and execute communication control processing, display / operation control processing, and the like.
The storage unit 23 includes a semiconductor memory such as a ROM and a RAM, and a program storage in which a communication control processing program executed by the control unit 22 and various processing programs such as a display / operation control processing program, a browser, and a mailer are stored. And an information storage area in which various information such as setting information of each function, communication history information, telephone directory information, text message information, and voice-attached moving image file is stored. Various registers and flags used by the unit 22 when executing the program are secured.

  The wireless communication unit 26 includes an RF circuit, a modulation / demodulation circuit, a baseband processing circuit, and the like. The wireless communication unit 26 modulates voice and data, transmits the radio wave via the antenna 25, and receives the radio wave via the antenna 25. Are used to perform voice communication and data communication according to a predetermined protocol.

  The operation unit 27 is a browser mode selection key for starting a browser and browsing a home page, a determination key used for determining an operation, a menu key for displaying an operation menu, and an input for switching a character input mode. Mode switch key, phone book key for registering and searching the phone book, call start key used for making a voice call, clear key to return the operation to the previous state, and various types of power on / off A function key group including a power key used for canceling the operation, a cursor key for moving the cursor on the display screen displayed on the display unit 9 in the vertical and horizontal directions, and for inputting numbers, for example, A numeric keypad group.

As shown in FIGS. 1 and 2, the biaxial hinge portion 4 is attached to the upper housing 6 and fixed to the upper housing 6. The biaxial hinge portion 4 is pivotally supported by the base plate 51. Then, the rotation shaft portion 52 whose front end portion projects parallel to the display screen of the display unit 9 of the upper unit 2, and the front end portion of this rotation shaft portion 52 is perpendicular to the rotation shaft portion 52. And a pivot shaft portion 53 that is disposed and pivotally supported.
The upper unit 2 and the lower unit 3 are folded by the rotation of the upper housing 6 with respect to the lower housing around the rotation shaft portion 53, and the lower housing relative to the upper housing 6 around the rotation shaft portion 52 is folded. By rotating, the upper unit 2 rotates while the plane including the display surface of the upper unit 2 intersects the plane including the operation surface of the lower unit 3.

In order to assemble the cellular phone 1 of this example, first, the gasket member 33 is bonded to the peripheral edge of the back surface of the diaphragm 31 via the frame-shaped double-sided adhesive sheet 37, and the side of the gasket member 33 that faces the diaphragm 31. A double-sided adhesive sheet 38 is affixed to the substrate.
Next, the actuator module 32 is bonded to a predetermined part on the back surface of the diaphragm 31 using, for example, a double-sided adhesive tape.
Next, the diaphragm 31 is positioned so that a predetermined corner portion 31m of the side wall surface 31a is in contact with the corresponding corner portion 16a of the side wall portion 16 of the front case 12, and the diaphragm 31 is interposed via the double-sided adhesive sheet 38. The gasket member 33 is bonded to the placement surface 17 m of the front case 12, and the diaphragm 31 is attached to the front case 12.

Further, the liquid crystal display panel 41 is interposed, for example, via a frame-like double-sided pressure-sensitive adhesive sheet in a state where the optical member group is sandwiched between the holding frame 42 and the front side of the holding frame 42 (the side on which the diaphragm 31 is attached). To fix.
Next, the dustproof cushion member 34 is attached to the holding frame 42 so as to be disposed at the peripheral edge of the liquid crystal display panel 41.
Next, the wiring board 43 is overlaid and assembled on the back surface side, and the end of the FPC is connected to the connector disposed at the end of the wiring board 43.
Next, the front case 12 is assembled from the diaphragm 31 side to the holding frame 42 to which the liquid crystal display panel 41, the light source unit, the wiring board 43, and the like are attached.

Next, a component group to which the diaphragm 31, the actuator module 32, the gasket member 33 and the like are attached is attached to the front case 12, and the actuator module 32 and the wiring board 43 are connected by a connector. Next, the mobile phone 1 is assembled by combining and fitting the rear cover 13 or tightening with a fixture such as a female screw or a male screw.
As a result, the diaphragm 31 comes into contact with the actuator module 32 at a predetermined portion, and vibration can be transmitted.

In the cellular phone 1 assembled in this manner, for example, when there is an incoming call with the housing opened, the control unit 22 controls the ringer generation unit 29 to generate a ringtone and control the light emitting unit 11. Then, the LED is emitted to notify the incoming call.
Next, the call is started by pressing the call start key of the operation unit 27, and the voice from the other party is output from the voice output unit 7.
That is, the control unit 22 controls the piezoelectric drive unit 8 so that the amplified drive signal is supplied to the actuator module 32. The actuator module 32 receives the amplified drive signal, converts the drive signal as an electrical signal into an acoustic signal, and vibrates the diaphragm 31. Sound waves are directly emitted from the diaphragm 31.

Even if the operator (user) does not touch the diaphragm 31, for example, the mobile phone 1 faces the front, listens to the received voice, speaks to the transmitter 28, and makes a call. it can. Here, when an image (moving image or still image) is added to the received data, the operator can make a call while looking at the display screen of the display unit 9.
Further, for example, when executing a program (such as a moving image file with sound) downloaded from a site, an image is displayed on the display unit 9 with the housing opened, and the sound is a diaphragm of the sound output unit 7. 31 is emitted.
Also, when using the mail reading function, sound is radiated from the diaphragm 31.

Further, since the gasket member 33 supports the diaphragm 31 without disturbing the vibration, sound is surely radiated from the diaphragm 31, and the operator (user) can clearly hear the sound even if it is relatively far away. I can listen. In addition, the non-water-permeable gasket member 33 having excellent weather resistance is bonded to the diaphragm 31 and the mounting surface 17m of the front case 12 via the double-sided adhesive sheets 37 and 38, respectively. Prevents moisture and the like from entering the body 6.
Further, the dust-proof cushion member 34 disposed inside the gasket member 33 also prevents dust from entering, for example, preventing the dust from adhering to the liquid crystal display panel 41.

As described above, according to the configuration of this example, the gasket member 33 supports the diaphragm 31 without disturbing the vibration of the diaphragm 31, so that sound is reliably radiated from the diaphragm 31, and even if the operator is relatively far away from the diaphragm 31. Can hear the voice clearly.
In addition, the non-water-permeable gasket member 33 having excellent weather resistance is bonded to the diaphragm 31 and the mounting surface 17m of the front case 12 via the double-sided adhesive sheets 37 and 38, respectively. 6 It is possible to prevent moisture and the like from entering the inside.
By using silicon rubber having high weather resistance as the material of the gasket member 33, the deterioration of the waterproof function can be suppressed due to secular change, and it is suitable for application to mobile phones that are often used outdoors.

Further, the dust-proof cushion member 34 disposed inside the gasket member 33 can also prevent dust from entering, for example, preventing the dust from adhering to the liquid crystal display panel 41.
Further, since the operator can listen to the received voice with the mobile phone 1 facing the front, for example, without touching the diaphragm 31 to the ear portion, from the position of the sound hole as in the prior art. The received voice can be heard reliably and clearly without losing the voice and obscuring, and the ear is separated from the mobile phone 1 and is generated toward the transmitter 28 to make a call. Can do. When an image (moving image or still image) is added, the operator can listen to the sound while looking at the display screen of the display unit 9.
In addition, the adoption of a flat panel speaker can contribute to thinning and downsizing of the device.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. Are also included in the present invention.
For example, in the above-described embodiments, the case where the diaphragm also serves as the screen member of the display unit has been described. However, the diaphragm may be provided exclusively. In this case, the diaphragm may not be transparent.
Further, the material of the gasket member is not limited to silicone rubber, and may be selected from fluorine rubber, polysulfide rubber, etc. as weather-resistant rubber. Further, not limited to rubber, a synthetic resin such as polyacetal that can be elastically deformed with a relatively small load may be used. Further, the housing may be made of metal or resin.
The flat panel speaker mounting structure in which the diaphragm is generally configured by being attached to a front case having an opening through a gasket member made of, for example, silicone rubber is not only dustproof and waterproof. By being sealed, it becomes possible to maintain airtightness. Generally, a lid-like member is attached to a casing of an electronic device in which an opening is formed so as to cover the opening through a gasket member made of, for example, silicone rubber attached to an edge of the opening. Thus, airtightness at the attachment site of the lid-like member is maintained.
Moreover, although the case where the audio | voice output part 7 was provided in one place was described, you may make it provide in two or more places. In this case, the installation position may be the upper unit or the lower unit.

In addition, an electronic camera unit may be added to provide a shooting function and a videophone function. In this case, a pseudo shutter sound may be generated from the audio output unit 7 during shooting.
Further, it may be configured such that the ring tone is output from the voice output unit 7 after adjusting the volume at the time of the incoming call.
Further, the diaphragm may be bonded directly to the gasket member via the adhesive layer without using the double-sided pressure-sensitive adhesive sheet, or may be bonded by thermal welding.

Moreover, you may make it attach a gasket member to a front case by methods other than adhesion | attachment.
Moreover, although the case where the rotation shaft portion 52 is parallel to the main surface of the upper housing 6 has been described, it may be perpendicular to the main surface of the upper housing 6. In this case, the upper unit 2 rotates while maintaining a substantially parallel relationship between the display surface of the upper unit 2 and the operation surface of the lower unit 3.
Further, the present invention can be applied not only to a biaxial hinge but also to a foldable mobile phone that can only be opened and closed, and can also be applied to straight type mobile phones other than the foldable type.

  As a portable electronic device, in addition to a cellular phone, the present invention can be applied to a simple cellular phone (PHS) terminal, a personal digital assistant (PDA), and a portable computer.

It is the figure which decomposed | disassembled the upper unit of the mobile telephone which is one Example of this invention, and was seen from the surface side, Comprising: It is a disassembled perspective view which shows the structure of the same upper unit. It is the figure which decomposed | disassembled the upper unit of the mobile phone and was seen from the back surface side, Comprising: It is a disassembled perspective view which shows the structure of the same upper unit. It is a block diagram which shows the structure of the mobile phone. It is a top view which shows the structure of the same upper unit. It is sectional drawing along the AA line of FIG. It is sectional drawing along the BB line of FIG. It is an expanded sectional view which expands and shows the C section of FIG. It is a block diagram which shows the structure of the audio | voice output part of the same mobile phone. It is a top view which shows the structure of the gasket member of the audio | voice output part. It is a bottom view showing the state where the gasket member and the actuator module are attached to the diaphragm. It is explanatory drawing for demonstrating a prior art. It is explanatory drawing for demonstrating a prior art. It is explanatory drawing for demonstrating a prior art.

Explanation of symbols

1 Mobile phone (portable electronic device)
2 Upper unit 3 Lower unit 4 Biaxial hinge part 6 Upper housing 7 Audio output part 9 Display part (display means)
12 Front case 13 Rear cover 14 Opening 31 Diaphragm 32 Actuator module (actuator)
33 Gasket member 33a Inner wall surface 33b Upper seal surface (first seal surface)
33c Lower seal surface (second seal surface)
34 Dust-proof cushion member 35 Flat panel speaker 36 Flat panel speaker mounting structure 37, 38 Double-sided adhesive sheet 41 Liquid crystal display panel

Claims (14)

A flat panel speaker that emits sound waves by vibrating a diaphragm by an actuator is a mounting structure of a flat panel speaker attached to a casing of a portable electronic device,
The diaphragm is attached to the casing in which the opening is formed so as to cover the opening via a gasket member bonded to the back surface of the diaphragm,
A mounting structure of a flat panel speaker in a portable electronic device, wherein the gasket member is made of a non-water-permeable flat elastic member.   The said gasket member is used in order to prevent a liquid from entering into the said housing | casing from the said opening, and is adhere | attached on the edge of the said opening of the said housing | casing. Mounting structure of a flat panel speaker in a portable electronic device.   The said gasket member supports the said vibration plate, deform | transforming along a thickness direction at least according to the vibration of the said vibration plate in the state adhere | attached on the said vibration plate. Mounting structure of a flat panel speaker in a portable electronic device.   4. The mounting structure for a flat panel speaker in a portable electronic device according to claim 1, wherein the gasket member is made of rubber.   5. The mounting structure for a flat panel speaker in a portable electronic device according to claim 4, wherein the gasket member is made of silicone rubber.   6. The mounting of a flat panel speaker in a portable electronic device according to claim 1, wherein the actuator includes a piezoelectric element and is in contact with a predetermined part of the diaphragm. Construction.   The portable electronic device includes display means for displaying character information or image information, and the diaphragm is made of a transparent member and also serves as a screen member for protecting the display screen of the display means. The mounting structure of the flat panel speaker in the portable electronic device according to any one of claims 1 to 6.   The gasket member is composed of a frame-like member that supports the diaphragm, and has a first seal surface and a second seal surface disposed on the diaphragm side and the edge side of the opening, respectively. The flat in the portable electronic device according to claim 1, wherein the second seal surface is in contact with the mounting surface of the edge portion so as to surround the opening. Panel speaker mounting structure.   9. The portable electronic device according to claim 8, wherein the gasket member supports the vibration plate by causing the first seal surface to abut a substantially rectangular annular region on a back surface of the vibration plate. Mounting structure for flat panel speakers.   10. The portable electronic device according to claim 1, wherein both of the gasket members are bonded to the diaphragm and the housing via a frame-shaped double-sided pressure-sensitive adhesive sheet, respectively. Mounting structure of flat panel speaker in equipment.   The flat panel speaker mounting structure for a portable electronic device according to claim 10, wherein the double-sided pressure-sensitive adhesive sheet has a waterproof function.   The flat in the portable electronic device according to any one of claims 1 to 11, wherein a frame-shaped dustproof cushion member for preventing intrusion of dust is disposed inside the gasket member. Panel speaker mounting structure.   A portable electronic device comprising the flat panel speaker mounting structure of the portable electronic device according to claim 1. A flat panel speaker mounting method for attaching a flat panel speaker that oscillates a diaphragm by an actuator to emit sound waves to a housing of a portable electronic device in which an opening is formed,
Prepare the diaphragm in which a gasket member made of a non-permeable flat elastic member is bonded to the back surface,
By adhering the gasket member to the edge of the opening, the diaphragm is attached to the casing via the gasket member so as to cover the opening, and liquid enters the casing from the opening. What is claimed is: 1. A flat panel speaker mounting method in a portable electronic device, characterized in that

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