JP3792608B2 - Foldable portable communication device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a foldable portable communication device such as a mobile phone.
[0002]
[Prior art]
In recent years, the sound output from mobile phone speakers is not limited to conventional ringing sounds, alarm sounds and sound effects, downloaded melodies, sound effects when playing games, and video distribution that is beginning to be performed by some carriers Voices such as videophones in BGM (Back Ground Music) and W-CDMA (Wide Band-Code Division Multiple Access) have been increasingly output.
In this case, the sound effects, video distribution, videophone sound, etc. when playing the game are heard while looking at a display unit such as a liquid crystal display (LCD).
[0003]
[Problems to be solved by the invention]
However, not only in straight type (non-foldable) mobile phones, but also in foldable mobile phones that are currently mainstream, the sound emission holes of the speakers that ring melodies and voices are on the back of the housing, that is, on the back of the display or Most of them are provided on the back of the operation unit.
If the sound output hole of the speaker is on the back of the housing, the output sound from the speaker will be sufficient because the sound pressure will deteriorate and the frequency characteristics will change compared to when the user listens from the front of the sound output hole of the speaker. There is a problem that it is difficult to obtain a proper volume and characteristics.
[0004]
As a method for solving this problem, it is conceivable to provide a speaker sound emission hole on the display unit side of the foldable mobile phone. Since the sound pressure deteriorates, the user may not be able to hear the ringing tone when receiving an incoming call.
The same problem occurs in other foldable portable communication devices such as PHS (Personal Handyphone System).
[0005]
An object of the present invention is to suppress a change in sound quality between a folded state and a non-folded state of a housing in a foldable portable communication device.
[0006]
[Means for Solving the Problems]
According to the present invention, the first casing having the receiving section and the display section and the second casing having the transmitting section and the key input section are connected to each other by the hinge so as to rotate around the hinge. In the foldable portable communication device configured to be foldable, at least a speaker for ringing a ring tone is provided in the second casing, and a sound hole for sounding ringing is provided in the second casing. The sound hole is located in the lower part of the display unit when the first housing is opened due to the open / closed state of the first housing. The folding portable communication device is characterized in that the sound hole is positioned at a connecting portion between the first housing and the second housing on the back side when the one housing is closed. Is provided. Due to the open / closed state of the first housing, the sound hole is located at the lower part of the display unit when the first housing is opened, and the sound hole is formed when the first housing is closed. It comes to be located in the coupling | bond part of the said 1st housing | casing and 2nd housing | casing of a back side.
[0007]
Here, an air chamber is provided in the front case of the second casing so as to surround the sound hole, and a speaker output sound output from the speaker disposed in the vicinity of the air chamber is the air chamber. The sound may be output from the sound hole.
Further, a sound path portion may be provided on a side surface, and a rubber ring may be provided on the speaker in order to obtain airtightness between the sound path portion and a fitting portion of an air chamber.
Moreover, you may use a magnetic sounder instead of the said speaker.
Further, a W-CDMA system or a GSM system may be used as a communication system.
According to the present invention, the hinge connecting portions of the first and second casings are connected to each other by a hinge so as to be rotatable, and at least a ringing sound is generated from a speaker provided in the first or second casing. In the foldable portable telephone device that is generated, a sound emitting hole is provided in a hinge connecting portion of the casing to which the speaker is attached, of the first or second casing. A foldable portable communication device is provided that outputs sound generated by the speaker through the sound hole. Of the first or second housing, the sound generated by the speaker is output from a sound emitting sound hole provided in the hinge connection portion of the housing to which the speaker is attached.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
First, an outline of a foldable portable communication device according to an embodiment of the present invention will be described. In a foldable portable communication device such as a foldable mobile phone, a speaker sound emitting hole is connected to two housings. When the housing is opened, the speaker sound emission hole is positioned at the front of the housing, and the housing is closed when the housing is closed. It is comprised so that. Thereby, the output direction of the speaker output sound can be changed.
[0009]
Therefore, when the user listens to the output sound from the speaker while looking at the display unit, the speaker sound emission hole is located below the display unit on the front of the device where the user can face the user. Can be suppressed. In addition, when the housing is closed, the speaker sound emission hole is located on the back side of the device of the housing coupling portion, so that the sound pressure degradation and frequency characteristics of the ringtone and melody sound ringed from the speaker during standby are remarkable. Change is suppressed.
[0010]
In addition, the folding portable communication device according to the present embodiment is provided with an air chamber in the front case of the housing so as to surround the sound hole for sounding the ringing tone, and is output from a speaker close to the air chamber. Since the speaker output sound is transmitted through the air in the air chamber and output from the speaker sound emission hole, the resonance frequency is changed by adjusting the volume of the air chamber and the area of the speaker sound hole using the commonly known Helmholtz resonance effect. And a resonance effect can be obtained.
[0011]
Hereinafter, a foldable portable communication device according to an embodiment of the present invention will be described in detail.
FIG. 1 is a front external view of a foldable portable telephone device according to an embodiment of the present invention, and FIG. 2 is a view showing a side external view of FIG. 1, showing an example of a foldable mobile phone 1. 1 and 2 show the cellular phone 1 in the open state, and the same portions are denoted by the same reference numerals.
FIG. 3 is a diagram showing a state in which the foldable mobile phone 1 is closed, and the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals.
[0012]
As shown in FIGS. 1 and 2, the cellular phone 1 having a folding structure includes a second casing 2 and a first casing that is rotatably connected to an upper end portion of the second casing 2 by a hinge 4. The housing 3 has a structure.
The first housing 3 is opened and closed with respect to the second housing 2 by being rotated by the hinge 4. That is, when the casing 3 is rotated from the closed state shown in FIG. 3, the casing 3 is opened (the state shown in FIGS. 1 and 2). By rotating the housing 3 in the reverse direction from the state where the housing 3 is open, the housing 3 is closed. As shown in FIG. 2, the mobile phone 1 is fixed so that the elevation angle of the housing 2 and the housing 3 is up to 155 degrees.
[0013]
4 is an assembly view of the mobile phone 1, FIG. 5 is a front view of the case 11 as viewed from the back of the case with the speaker 25 and the circuit board 20 mounted thereon, and FIG. 6 is a cross-sectional view taken along the line aa ′ in FIG. It is. 1 to 6, the same parts are denoted by the same reference numerals.
[0014]
Hereinafter, with reference to FIGS. 1 to 6, the configuration of the mobile phone 1, particularly, the configurations of the housings 2 and 3 will be described.
The first and second casings 3 and 2 are each composed of two front and rear cases and circuit boards, electrical parts such as a speaker and a microphone, and the front and rear cases are fitted and screwed with screws. Fixed.
[0015]
Main components of the second housing 2 are various input keys 5 and microphone sound holes 14 as information input means, and a microphone as voice input means is provided below the thickness and microphone sound holes 14. The input key 5 is used to make a call, receive a call, input a telephone number or address, mail text, etc., and input a voice using a microphone.
A speaker 25 for ringing a ringtone or a ringing melody is provided below the speaker sound hole 13.
[0016]
The second housing 2 includes a case 11 on the button surface side of the input key 5 and a case 12 on the back side, a power source, a key input unit, a driving circuit such as a display unit and a speaker, an integrated circuit, and a wireless circuit necessary for a call. The circuit board 20 and the key sheet 24 are included. The case 11 has a speaker sound hole 13, a microphone sound hole 14, a button through hole 15 for a key sheet 24, which will be described later, and an airtight room (air gap) provided between the speaker 25 and the speaker sound hole 13 of the case 11. Chamber) 17 and a screw hole 16 for screwing.
[0017]
The first housing 3 includes a case 31 on the display unit 34 side, a case 32 on the back side, a second circuit board 35, a display unit 34, a receiving speaker 36, a whip antenna 39, and the like. The case 31 is provided with a screen for a display unit made of a reception sound hole 33 and a transparent plastic. The case 32 is provided with a cylinder and a tap for fitting and holding the antenna 39.
[0018]
The first casing 3 includes a display unit 34 that is a display unit made of a liquid crystal display (LCD) on a second circuit board 35 and a reception speaker (receiver) that is a voice output unit below the reception sound hole 33. 36), various character information and image information are displayed on the display unit 34, and a sound such as a call voice is output from the handset. An expandable whip antenna 39 is provided at the upper end of the first housing 3.
The mobile phone 1 having a folding structure is provided with an earphone jack or the like used for connection of a battery or an earphone microphone, but is not shown because it is not directly related to the present invention.
[0019]
Next, details of the internal structure of the housing 2 will be described with reference to FIG. The housing 2 sandwiches the circuit board 20, the key sheet 24 that is the button part of the input key 5, the speaker 25, and the like between the case 11 on the button surface side (front side) of the input key 5 and the case 12 on the back side. It is gripped and screwed with screws. The speaker 25 and the circuit board 20 are electrically connected by contact between the two-pole connector 21 provided on the circuit board 20 and a connection terminal provided on the speaker 25.
[0020]
Next, the configuration of the case 11 and the mounting structure of the speaker 25 will be described with reference to FIGS.
First, details of the case 11 will be described. In the case 11, a front air chamber 17 is configured by a wall that surrounds the three directions of the speaker sound hole 13 and a wall that surrounds the upper surface of the wall. A speaker insertion port 18 is provided on one surface of the front air chamber 17, and an output sound is output from the speaker sound hole 13 by inserting the sound path 103 of the speaker 25 into the speaker insertion port 18. . The speaker sound hole 13 is disposed at a position at an angle of 90 to 120 degrees with respect to the horizontal plane of the case 11 in the hinge coupling portion 50 of the case 11.
[0021]
Further, in order to enhance the airtightness of the fitting portion between the speaker insertion port 18 and the speaker 25, the speaker 25 is mounted so that the rubber ring 26 is fitted into the speaker and the sound path 103 is inserted into the speaker insertion port 18. The speaker 25 and the case 11 are fixed by attaching a cushion 27 made of a foam material and a double-sided tape attached to the speaker 25 to the case 11.
Further, the case 11 is provided with a microphone sound hole 14, a through hole 15 for each button of the key sheet 24, a screw screw hole (tap) 16 for fixing the case 12, and the like. In addition, since the battery of the mobile phone, the configuration and mounting of the display unit 34 are not directly related to the present invention, illustration and description thereof are omitted.
[0022]
Next, the structure of the speaker 25 mounted in the present embodiment will be described with reference to FIGS. 7 and 9 are a front view and a rear view of the speaker 25, respectively, and FIG. 8 is a cross-sectional view taken along the line aa ′ shown in FIG.
The speaker used in this embodiment is a dynamic type in which a thin film is vibrated by a driving force generated by a magnetic flux formed by a permanent magnet and a magnetic flux obtained by passing a current through a voice coil.
[0023]
Since the sound generation mechanism of this speaker is not different from that of a general dynamic speaker, its description is omitted. The feature of this speaker is that the speaker output sound is output from the sound path 103 provided on the side surface of the frame 102, not from the sound emission hole provided in the protector unit 101, which is found in a general speaker. .
The components are a diaphragm having a magnetic circuit, a frame 102 made of plastic such as PPA for supporting the connection terminal portion 109, a yoke 104, a top plate 106, a permanent magnet 105, and a voice coil 107 for constituting the magnetic circuit. 108, a protector 101 for protecting an internal component made of a metal material such as SUS, and a sound path 103 provided on the side surface of the frame 102. The frame 102 has a through hole 110 provided from the inside to the outside. It is used as an exhaust hole for the diaphragm 108.
[0024]
The connection terminal portion 109 is a gold-plated metal terminal plate, and enables electrical connection by contact with the two-pole connector 21 mounted on the circuit board 20.
As a method for connecting the present speaker, in addition to the method described above, a method of providing a leaf spring at the position of the connecting terminal portion 109 or a method of soldering a lead wire with a connector to the connecting terminal portion 109 and inserting it into the two-pole connector 21 There is also.
The sound path 103 is provided with a groove into which the rubber ring 26 can be fitted.
[0025]
The operation of the mobile phone 1 according to the present embodiment configured as described above will be described with reference to FIGS.
As shown in FIG. 1, a cellular phone 1 having a folded structure has a structure having a housing 2 and a housing 3 that is rotatably connected to an upper end portion of the housing 2 by a hinge 4.
[0026]
In the mobile phone 1, the housing 3 is opened and closed with respect to the housing 2 by the rotation of the hinge 4. That is, as shown in FIG. 1, the casing 3 is fixed by opening the casing 3 up to 155 degrees by rotating the casing 3 from the closed state shown in FIG. 2. . On the contrary, by rotating the housing 3 in the reverse direction from the opened state, the housing 3 is closed.
The position of the speaker sound hole 13 and the output direction of the speaker sound when the housing is opened / closed will be described. When the housing 3 is opened as shown in FIG. 10, the speaker sound hole 13 is located below the housing 3 display unit 34. When the housing 3 is closed as shown in FIG. 11, the speaker sound hole 13 is located on the back side of the coupling portion 50 between the housing 2 and the housing 3.
[0027]
That is, the speaker output sound is output from the speaker sound hole 13 below the display unit 34 of the casing 3 to the front of the apparatus when the casing 3 is opened, and the casing 2 and the casing are closed when the casing 3 is closed. 3 is output from the speaker sound hole 13 on the back side of the connecting portion to the back side of the apparatus.
As described above, in the cellular phone 1, the speaker sound hole 13 is closed when the position of the speaker 3 is closed by the opening / closing operation of the case 3, and the case is opened when the case 3 is opened. Can be changed.
[0028]
Next, an operation when the mobile phone 1 is actually used will be described. The case where the user listens to the downloaded melody or the sound effect or sound when playing the game will be described.
In this case, the user operates the input key 5 while looking at the display unit 34 to download and play the incoming melody, play a game, W-CDMA videophone, and distribute video. When performing this operation, the user operates the input key 5 while holding the mobile phone 1 in the left hand or the right hand while looking at the display unit 34 with the housing 3 opened.
[0029]
At this time, since the mobile phone 1 is in a state in which the housing 3 is opened as shown in FIG. 1, the sound hole 13 appears on the front surface of the housing and below the housing 3 display section 34 as shown in FIG. 10. Therefore, the user and the sound hole 13 are opposed to each other, and the output from the speaker is not diffracted to the user and reaches the shortest distance. Therefore, the sound pressure deterioration and the change in the frequency characteristics of the melody, the sound effect of the game, the sound, etc. There is an advantage that it sounds less to the user.
[0030]
Next, an operation when the user is not operating the mobile phone 1 will be described. When the user is not operating the mobile phone 1, it can be placed on a desk or table, placed in a pocket, placed in a charger, etc. In many cases, the casing 3 of the mobile phone 1 is closed as shown in FIG. In this case, assuming that the speaker sound hole 13 is arranged at the lower part of the housing 3 display section 34, the speaker sound hole 13 is blocked by the housing 2, so that extreme sound pressure degradation occurs, and the user It is difficult to notify that the mobile phone 1 has received an incoming call.
[0031]
However, even when the housing 3 of the mobile phone 1 is closed, the speaker sound hole 13 is located on the rear side of the connecting portion 50 between the housing 2 and the housing 3 as shown in FIGS. The sound hole 13 is not blocked by the housing 2 and the housing 3. That is, a ring tone, a melody, or a sound that is an output sound from the speaker is output without any deterioration in sound pressure even when the casing 3 of the mobile phone 1 is closed.
[0032]
As described above, in the foldable mobile phone 1 according to the present embodiment, the speaker sound hole 13 is provided in the coupling portion 50 between the hinge 4 and the two housings 2 and 3, thereby changing the output direction of the speaker sound. The output direction can be changed to the front side of the device (display unit) when the (mobile phone 1) is opened, and to the rear side of the device when the device (mobile phone 1) is closed.
[0033]
In other words, when the user listens to the output sound from the speaker while looking at the display unit, the speaker sound emission hole is located at the lower part of the display unit on the front of the device where the user can face the user. When the housing is closed, the speaker sound emission hole is located on the rear side of the device of the housing coupling portion 50. Therefore, the ring tone and melody sound that are ringed from the speaker during standby and the frequency characteristics are deteriorated. There is an advantage that no significant change occurs.
[0034]
Next, another embodiment of the present invention will be described with reference to FIG.
As described above, FIG. 6 is a cross-sectional view of the state in which the speaker 25 is mounted on the case 11. In the case 11, the front air chamber 17 includes a wall that surrounds the three directions of the speaker sound hole 13 and a wall that surrounds the upper surface of the wall. The sound path 103 of the speaker 25 with the rubber ring 26 is inserted through the speaker insertion port 18 to ensure airtightness, so that the output sound is output from the speaker sound hole 13.
[0035]
Thus, since the sound path 103 is provided in the front air chamber 17 and the speaker 25, the volume of the front surface of the speaker is larger than that of a conventional mobile phone. Therefore, by using the volume of the front surface of the speaker and adjusting the area of the speaker sound hole 13 using the Helmholtz resonance equation shown in the following equation (1), the resonance frequency can be changed and the resonance effect can be obtained. This makes it possible to emphasize a certain frequency band of the sound.
[0036]
Fv = (C × D / 4) × √ (1 / (V × (L + A × D) × π)) (1) where Fv is resonance chamber resonance frequency (Hz), and V is resonance chamber volume ( mm ³ ), D is the sound emission hole diameter (mm), L is the case thickness (mm) of the casing, C is the speed of sound (about 344,000 (mm / sec)), and A is a constant (0.75).
The above formula (1) was devised by German physicist Helmholtz and is generally well known. The resonance frequency of the resonance chamber can be calculated by giving the volume of the resonance chamber, the diameter of the sound emission hole, and the case thickness of the sound emission hole. It is a formula.
[0037]
The table of FIG. 12 is a list of resonance frequencies calculated using the Helmholtz resonance equation when the volume of the resonance chamber is 100 mm ³ , 150 mm ³ , and 200 mm ³ and the sound hole area is changed. When the volume of the resonance chamber is set to 150 mm ³ and the sound hole area is set to 10 mm ² , the resonance effect can be obtained with the resonance frequency of 7376 Hz as the center frequency.
[0038]
As described above, the foldable mobile phone according to the present embodiment connects the hinge connecting portions 50 of the first and second casings 2 and 3 so as to be rotatable with respect to each other by the hinges 4. In the foldable portable communication device 1 configured to generate at least a ringing tone from the speakers provided in the housings 2 and 3, the speaker 25 of the first or second housings 2 and 3 is attached. A sound emitting hole 13 is provided in the hinge connecting portion 50 of the other housing 2, and the sound generated by the speaker 25 is output through the sound hole 13.
More specifically, the foldable mobile phone according to the present embodiment is configured such that the first housing having the receiver and the display and the second housing including the transmitter and the key input unit can be rotated by the hinge. In a foldable portable communication device that is connected and is foldable by rotating relative to each other about the hinge, at least a speaker for ringing a ring tone is provided in the second housing, and a ringing tone is released. A sound hole for sound is provided in the hinge coupling portion 50 of the second casing, and the first casing is opened and opened at the bottom of the display section when the first casing is opened due to the opened / closed state of the first casing. The sound hole is located, and when the first housing is closed, the sound hole is located at the connecting portion 50 between the first housing and the second housing on the back side. It is characterized by becoming.
[0039]
That is, according to the embodiment, since the speaker sound hole 13 is provided in the hinge coupling portion 50 of the housing 2 in the foldable mobile phone 1, the incoming melody and sound effect that are output from the speaker when the housing is opened and closed. And the sound output direction can be switched between the front and back of the housing. Specifically, when the housing 3 is opened, the speaker sound hole 13 appears in the lower portion of the display unit 34 on the front surface of the apparatus, and when the housing 3 is closed, the speaker sound hole 13 is formed on the housing on the rear side of the housing. 2 and the housing 3, the output direction of the output sound from the speaker is switched according to the open / close state of the housing 3.
[0040]
Also, when listening to the output sound such as melody or game sound effect that the user downloaded while looking at the display unit, the speaker sound emission hole is located under the display unit on the front of the device that can face the user, so the sound pressure degradation Therefore, it is possible to suppress the change of the frequency characteristics, and the deterioration of the sound pressure is small as compared with the case where the speaker sound emission holes are arranged on the back side of the apparatus, and excellent characteristics can be obtained. Therefore, it is possible to suppress a change in sound quality between the folded state and the unfolded state of the casing.
In addition, the resonance frequency is changed by adjusting the area of the speaker sound hole using the commonly known Helmholtz resonance effect using the volume of the front air chamber and speaker sound path provided in the case where the speaker is mounted. Can be obtained.
[0041]
An air chamber is provided in the front case of the second housing so as to surround the sound hole, and a speaker output sound output from the speaker disposed close to the air chamber is generated in the air chamber. You may comprise so that it may be transmitted and output from the said sound hole.
Further, a sound path portion may be provided on a side surface, and a rubber ring may be provided on the speaker in order to obtain airtightness between the sound path portion and a fitting portion of an air chamber.
[0042]
In the above-described embodiment, the example of the cellular phone is described as an example of the folding portable communication device, but the present invention can also be applied to a folding portable communication device such as a PHS (Personal Handy Phone System).
Further, a magnetic sounder may be used instead of the ring tone and the melody ringing speaker 25.
As a communication method, a W-CDMA method or a GSM (Global System for Mobile communication) method may be used.
[0043]
【The invention's effect】
According to the present invention, it is possible to suppress a change in sound quality between a folded state and a non-folded state of a housing in a foldable portable telephone device.
[Brief description of the drawings]
FIG. 1 is a front external view of a foldable mobile phone according to an embodiment of the present invention.
FIG. 2 is a side external view of a foldable mobile phone according to an embodiment of the present invention.
FIG. 3 is an external view of the foldable mobile phone according to the embodiment of the present invention, and is a front external view showing a folded state.
FIG. 4 is an assembly view of a foldable mobile phone according to an embodiment of the present invention.
FIG. 5 is a diagram showing an internal configuration of the foldable mobile phone according to the embodiment of the present invention.
FIG. 6 is a cross-sectional view of a foldable mobile phone according to an embodiment of the present invention.
FIG. 7 is a front view of a speaker used in the foldable mobile phone according to the embodiment of the present invention.
FIG. 8 is a cross-sectional view of a speaker used in the foldable mobile phone according to the embodiment of the present invention.
FIG. 9 is a rear view of a speaker used in the foldable mobile phone according to the embodiment of the present invention.
FIG. 10 is an explanatory diagram showing an open state of the folding mobile phone according to the embodiment of the present invention.
FIG. 11 is an explanatory diagram showing a folded state of the foldable mobile phone according to the embodiment of the present invention.
FIG. 12 is a diagram showing a resonance frequency of a foldable mobile phone according to another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Folding type | mold mobile telephone 2 as a foldable portable telephone apparatus ... 2nd housing | casing 3 ... 1st housing | casing 4 ... Hinge 5 ... Input key 11 ... Button Surface (front) side case 12 ... Back side case 13 ... Speaker sound hole 14 ... Microphone sound hole 15 constituting the summation part ... Through hole 16 ... Screw hole 17 ... Air chamber 18 ... Speaker insertion slot 20, 35 ... Circuit board 21 ... Connector 24 ... Key sheet 25 ... Speaker 26 ... Rubber ring 27 ... Cushion 31 ... Display (front) ) Side case 32... Back side case 33... Reception sound hole 34 constituting display part... Display part 36 .. reception speaker 39... Antenna 50. Protector part 102 ... Frame 103 ... Sound path 104 ... Yo Click 105 ... permanent magnet 106 ... top plate 107 ... voice coil 108 ... diaphragm 109 ... connection terminal 110 ... through hole

Claims (4)

A foldable mobile phone in which the hinge connecting portions of the first and second casings are connected to each other by a hinge so as to generate at least a ringing tone from a speaker provided in the first or second casing. Type communication device,
A sound hole for sound emission provided in a hinge connecting portion of a housing to which the speaker is attached;
An air chamber disposed in proximity to the speaker and surrounding the sound hole;
A sound path provided on a side surface of the speaker;
A rubber ring provided in the speaker to obtain airtightness with the fitting portion of the air chamber in the sound path portion;
When the first casing is opened, the sound hole is positioned below a display portion provided in the first casing, and when the first casing is closed, the sound hole is positioned. Comes to be located at the joint between the first casing and the second casing on the back side,
A foldable portable communication device characterized in that a speaker output sound output from the speaker is output from the sound hole through the sound guide section and the air chamber . The first casing includes a receiver and the display, and the second casing includes a transmitter and a key input unit.
The folding according to claim 1, wherein the speaker, the air chamber, and the sound path portion are provided in the second casing, and the sound hole is provided in a hinge connecting portion of the second casing. Type portable communication device.   3. The foldable portable communication device according to claim 1, wherein a magnetic sounder is used instead of the speaker. The foldable portable communication device according to any one of claims 1 to 3 , wherein a W-CDMA system or a GSM system is used as a communication system.

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