JP2003152844A - Mobile communication terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile communication terminal that can reduce deterioration in transmitted voice. SOLUTION: An earpiece 5 formed by integrating a bone conduction microphone and a speaker is fitted to be turnably by using a hinge 12 as a turning shaft. The earpiece 5 is contained in a hole 11b formed to a case 11 when no voice speech is made and taken out from the hole 11b when a voice speech is made. The earpiece 5 is used by being mounted on an ear when the voice speech is made. When a user makes utterance while mounting the earpiece 5, the bone conduction microphone detects vibration of the ear bone attended with the voice utterance and transduces it into an electric signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication terminal device capable of voice communication, and more particularly to a mobile communication terminal device using a bone conduction microphone.

[0002]

2. Description of the Related Art Conventionally, mobile phones such as so-called mobile phones and simple mobile phones (PHS; Personal Handyphone System (registered trademark)) have been proposed. The mobile phone includes a transmitter that has a microphone that detects voice and converts it into an electric signal, and a receiver that has a speaker that converts the electric signal into voice and reproduces it. The electric signal supplied from the transmitter is converted and transmitted to another telephone or the like. In addition, an electric signal obtained by converting a signal transmitted from another telephone or the like is supplied to the earpiece.

[0003]

By the way, in the portable telephone, the positional relationship between the receiving section and the transmitting section is set according to the positional relationship between the human ear and mouth.

For example, as shown in FIG. 11, in a straight mobile phone 100, an antenna 102 is provided on one of the longitudinal ends of a casing 101, and an interface is provided on the other longitudinal end. 103 is provided, and the monitor 10 is provided on one main surface 101 a of the housing 101.
4 and an input unit 105 are provided. In the mobile phone 101, the earpiece 106 and the transmitter 107 are provided on the one main surface 101a of the housing 101.
Is provided near the antenna 102, and the transmitter 1
07 is provided at a position close to the interface 103. Further, in the mobile phone 100, the length l in the longitudinal direction of the housing 101 is substantially the same as the average length of the human ear and mouth.

However, when the mobile phone 100 is used, the microphone 106 detects noise because the earpiece 106 is in direct contact with the ear while the transmitter 107 is separated from the mouth. Therefore, when the mobile phone 100 is used in a high ambient noise level, the voice-to-noise ratio detected by the microphone deteriorates, and the quality of the transmitted voice deteriorates. Becomes difficult. Further, as the distance between the transmitter 107 and the mouth increases, the ratio of voice to noise detected by the microphone deteriorates significantly.

On the other hand, there has been proposed an earphone type bone conduction microphone in which a bone conduction microphone and a speaker are integrated and mounted on the ear for use.

The bone conduction microphone is a microphone that detects the vibration of the ear bone caused by vocalization and converts it into an electric signal.

As shown in FIG. 12, an earphone-type bone conduction mylophone 120 has a bone conduction microphone 121 and a speaker 122 integrated with each other, and has a shape that can be attached to an ear, and a cable 123 is used. It is connected to the terminal 124. The earphone type bone conduction microphone 120 is used by inserting the terminal 124 into an earphone insertion part (not shown) provided in the mobile phone 100.

Since the bone conduction microphone 121 detects the vibration of the ear bone caused by utterance, the detection sensitivity to ambient noise is extremely low. Therefore, by using the earphone type bone conduction microphone 120, even when the mobile phone 100 is used in a place where the ambient noise level is high, it is possible to prevent the quality of the transmitted voice from being degraded.

However, the earphone-type bone conduction microphone 120 needs to be carried separately from the mobile phone 100. Therefore, it is easy for a user to forget to carry the earphone-type bone conduction microphone 120, for example.

Further, Japanese Patent Application Laid-Open No. 3-266550 discloses a mobile phone equipped with a bone conduction microphone.

However, as shown in FIG. 13, since the bone conduction microphone 131 of the mobile phone 130 is projected from the main surface 132a of the housing 132, it is difficult to put the mobile phone 130 in a pocket, for example. This causes inconveniences such as the above and makes it inconvenient to handle.

The present invention has been proposed in view of the conventional circumstances described above, and because the bone conduction microphone is provided, the quality of voice transmitted is good, and
An object is to provide a mobile communication terminal device that is easy to handle.

[0014]

SUMMARY OF THE INVENTION A communication terminal device according to the present invention is a mobile communication terminal device capable of voice communication, and detects bone vibration caused by vocalization and converts it into an electric signal. And a speaker for converting an electric signal into a sound and outputting the same, and a transmitter / receiver having a shape attachable to a human ear, and the transmitter / receiver are provided in a housing. And a holding means for movably holding the housing so that the housing can be housed in the hole and is protruded from the one main surface of the housing by operating from the hole. By being in a state of protruding from one main surface of the body, it can be worn on a human ear, and when the user utters with the transmitting / receiving means attached to the ear, the bone conduction microphone accompanies utterance. Vibration of the ear bone caused by Characterized in that it.

Therefore, in the communication terminal device according to the present invention, the user operates the transmitter / receiver unit so that the transmitter / receiver unit protrudes from one main surface of the housing, and the user mounts it on the ear portion to make a voice, thereby transmitting the bone conduction microphone. Can detect the vibration of the ear bone and convert it into an electrical signal.

Further, in the communication terminal device according to the present invention, state detecting means for detecting that the transmitter / receiver unit is in a state of being protruded from one main surface of the casing, and the transmitter / receiver unit of the casing are provided. It is characterized in that it is provided with a control means for connecting to a line and enabling a voice call when it is detected that it is projected from one main surface.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The present invention can be applied to the mobile phone 1 shown in FIG.

The mobile phone 1 includes an input unit 2 and a control unit 3.
The display unit 4, the earpiece 5, the audio processing unit 6, the modulation / demodulation unit 7, the wireless unit 8, the antenna 9, and the hinge control unit 10.

The appearance of the mobile phone 1 is shown in FIGS.
It becomes as shown in. The mobile phone 1 includes a housing 11 and a hinge portion 12.

The input unit 2 is provided with a plurality of keys 2a such as numeric keys and operation keys on one main surface 11a of the housing 11. When a key provided in the input unit 2 is pressed, the numbers registered in the key and data instructing various operations are supplied to the control unit 3. More specifically, by operating the keys provided on the input unit 2, the user inputs various information such as the telephone number of the transmission destination. Further, the input unit 2 is provided with a hook key, and by pressing the hook key, it is possible to connect to or disconnect from the line. In the following, the state of being connected to the line is referred to as off-hook, and the state of being disconnected from the line is referred to as on-hook.

The control unit 3 controls the input unit 2, the display unit 4, the modulation / demodulation unit 7, and the like. The control unit 3 also performs processing based on the signals supplied from the input unit 2, the modulation / demodulation unit 7, and the like. More specifically, the control unit 3 sounds a ringing tone in response to a call from another communication device, or transmits the address of the communication device when communicating with the other communication device.

The display unit 4 displays various information under the control of the control unit 3, and includes a display device 4a for displaying a liquid crystal on one main surface 11a of the housing 11. Specifically, the display unit 4 displays information input from the input unit 2, information stored in a memory (not shown), and the like.

The earpiece 5 is a transmitting and receiving means, and the bone conduction microphone 20 and the speaker 21 are connected to each other by the cover 2
It is integrated by being covered with 2. The earpiece 5 is attached to the housing 11 via the hinge portion 12. The earpiece 5 is attached so as to be rotatable around the hinge portion 12 as a rotation axis, and as the hinge portion 12 rotates, the earpiece 5 shown in FIG.
As shown in FIG. 5, the housing 11 is housed in the hole 11 b provided in the housing 11. The earpiece 5 is housed so as to form substantially the same surface as the one main surface 11 a of the housing 11. Also, earpiece 5
Is rotated as shown in FIG. 3 (B).
As shown in FIG. 3, the housing 11 is pulled out from the hole 11b and protrudes from the one main surface 11a of the housing 11, and can be attached to the ear. The earpiece 5 has a shape that is easily attached to the ear when it is pulled out from the housing 11.

The bone conduction microphone 20 detects the vibration of the ear bone caused by the user's utterance, converts it into an electric signal, and outputs it to the sound processing unit 6. Bone conduction microphone 2
As 0, for example, an acceleration vibration pickup type microphone is used.

The speaker 21 converts the electric signal supplied from the sound processing unit 6 into sound and outputs the sound.

The cover 22 is made of a material such as rubber that facilitates conduction of vibration of the ear bone. Further, the cover 22 is provided with a sound emission hole (not shown) for emitting the sound output from the speaker 21 without leakage.

The voice processing unit 6 has an A / D (Anal) not shown.
og / Digital) converter, D / A (Digital / Analog)
A converter, an amplifier, a codec circuit, etc. are provided. The audio processing unit 6 performs amplification, A / D conversion, addition of an error correction code, etc. on the signal supplied from the earpiece 5, and then supplies the signal to the modulation / demodulation unit 7. Further, the audio processing unit 6 performs error correction processing, D / A conversion, amplification, etc. on the signal supplied from the modulation / demodulation unit 7, and then supplies the signal to the earpiece 5.

The modulation / demodulation unit 7 modulates a predetermined carrier signal according to the baseband signal supplied from the audio processing unit 6 and supplies it to the radio unit 8. Further, the modulation / demodulation unit 7 demodulates the intermediate frequency signal (hereinafter, referred to as an IF signal) supplied from the wireless unit 8 into a baseband signal and supplies the baseband signal to the audio processing unit 6.

The radio section 8 receives the I signal supplied from the modulation / demodulation section 7.
The F signal is mixed with an output from a frequency synthesizer (not shown) to form a radio frequency signal (hereinafter referred to as an RF signal), which is then amplified and supplied to the antenna 9. In addition, after amplifying the RF signal supplied from the antenna 9, it is mixed with the output from the frequency synthesizer to produce an IF signal.
The signal is supplied to the modulator / demodulator 7 after being amplified as a signal.

The antenna 9 is the R supplied from the radio unit 8.
The F signal is transmitted to the external base station. Also, the antenna 9
Receives a signal transmitted from an external base station and supplies the signal to the wireless unit 8.

The hinge control unit 10 includes a side surface 11 of the housing 11.
The hinge control key 10a is provided in c, and when pressed, the rotation of the hinge portion 12 is controlled, and the earpiece 5 is automatically accommodated and pulled out.

The hinge portion 12 is a holding means and holds the earpiece 5 so as to be rotatable. The hinge portion 12 has a substantially columnar shape, and both ends in the longitudinal direction are designated by the housing 11. The earpiece 5 is attached in the longitudinal direction of the hinge portion 12, and when the hinge portion 12 rotates, the earpiece 5 is accommodated in a hole portion 11b provided in the housing 11,
It may be pulled out from the hole 11b.

The flow of signals when the mobile phone 1 described above transmits and receives voice will be described below. It should be noted that the user pulls out the earpiece 5 from the housing 11 by pressing the hinge control key 10a and wears the earpiece 5 on the ear during at least the voice call.

The signal flow when transmitting the voice uttered by the user is as described below.

First, when the user utters, the bone conduction microphone 20 detects the vibration of the ears and bones caused by the user's utterance. The bone conduction microphone 20 converts the detected vibration of the ear bone into an electric signal and supplies the electric signal to the sound processing unit 6.

Next, the audio supply unit 6 performs amplification, A / D conversion, encoding, addition of error correction code, etc. on the signal supplied from the bone conduction microphone 20. The audio supply unit 6 supplies the signal to the modulation / demodulation unit 7.

Next, the modulation / demodulation unit 7 modulates a predetermined carrier signal with the baseband signal supplied from the audio supply unit 6,
It is supplied to the wireless unit 8.

Then, the radio section 8 mixes the supplied signal with the output from the frequency synthesizer to form an RF signal, and then amplifies the RF signal and supplies it to the antenna 9.

Finally, the antenna 9 transmits the signal supplied from the radio section 8 to an external base station.

Further, the flow of the signal from receiving the signal transmitted from the communication device of the other party, converting it to voice, and outputting the voice is as described below.

First, the antenna 9 receives a signal transmitted from an external base station and supplies it to the radio section 8.

Next, the radio unit 8 amplifies the RF signal supplied from the antenna 9 and then mixes the RF signal with the output from the frequency synthesizer to form an IF signal,
Amplify the F signal. The wireless unit 8 supplies the amplified IF signal to the modulation / demodulation unit 7.

Next, the modulation / demodulation unit 7 modulates the IF signal supplied from the radio unit 8 into a baseband signal. The modem unit 7 supplies the baseband signal to the audio processing unit 6.

Then, the voice processing unit 6 performs coding, error correction processing, D / D processing on the signal supplied from the modulation / demodulation unit 7.
A conversion, amplification, etc. are performed. The voice processing unit 6 supplies the amplified signal to the speaker 21.

Finally, the speaker 21 converts the electric signal supplied from the voice processing unit 6 into a voice and outputs it.

As described above, in the mobile phone 1 to which the present invention is applied, the bone conduction microphone 20 that detects the vibration of the bone caused by utterance and converts it into an electric signal, and the speaker 21 that outputs the sound. The earpiece 5 is integrated and has a shape that can be worn on a human ear. The earpiece 5 is attached so as to be rotatable around the hinge portion 12, and is pulled out from a hole portion 11b provided in the housing 11 to project from one main surface 11a of the housing 11 when performing a voice call. When the voice call is not performed, it can be accommodated in the hole 11b. When the user makes a voice call and pulls out the earpiece 5 from the hole 11b, attaches it to the ear, and utters, the bone-conduction microphone 20 converts the vibration of the ear bone accompanying the utterance into an electric signal, and the electric signal is transmitted. It is supplied to the voice processing unit 6.

In the mobile phone 1 to which the present invention is applied,
Since the earpiece 5 is attached to the ear, it has extremely low detection sensitivity to ambient noise.

The portable telephone 1 to which the present invention is applied is
The earpiece 5 is provided so that it can be housed in the housing 11. By allowing the earpiece 5 to be housed in the housing 11, inconveniences such as difficulty in putting the earpiece 5 in a pocket when carrying the device are less likely to occur.

Therefore, the mobile telephone 1 to which the present invention is applied has a good quality of voice to be transmitted even when a voice call is made in a place where ambient noise level is high, and at the same time, it is portable. The inconvenience such as inconvenience is reduced, and the handling becomes simple.

The mobile phone 1 has a hinge control unit 10.
Alternatively, for example, the user may manually pull out the earpiece 5 from the hole 11b.

Although the present invention is applied to the mobile phone 1 in the present embodiment, the present invention can be applied to any mobile communication terminal device capable of voice communication other than the mobile phone.

Further, as shown in FIGS. 4 and 5, the earpiece 5 may be configured to move in a direction substantially perpendicular to the one main surface 11a of the housing 11. Hereinafter, the mobile phone 25 in which the earpiece 5 moves in a direction substantially perpendicular to the one main surface 11a of the housing 11 will be described.

The appearance of the mobile phone 25 is as shown in FIGS. The mobile phone 25 includes a clip 26 instead of the hinge portion 12 included in the mobile phone 1.

The clip 26 is a holding means for the earpiece 5, and holds the earpiece 5 in a protruding state when the earpiece 5 is pulled out. Further, when the earpiece 5 is stored, the state in which the earpiece 5 is stored is maintained.

The earpiece 5 is perpendicular to the main surface 11a of the housing 11 from the state of being housed in the hole 11b as shown in FIG. 5A, as indicated by an arrow X in the figure. Further, as the bottom surface 5a of the earpiece 5 moves in the direction of approaching the one main surface 11a, the earpiece 5 is projected from the one main surface 11a of the housing 11 as shown in FIG. 5B. In addition, the earpiece 5 has a casing 11 as shown in FIG.
From the state of protruding from the one main surface 11a to the direction perpendicular to the one main surface 11a of the housing 11 and the bottom surface 5a of the earpiece 5 is separated from the one main surface 11a, as indicated by an arrow Y in the figure. By moving, it is housed in the housing 11 as shown in FIG.

The present invention also relates to the mobile phone 3 shown in FIG.
It is also possible to apply 0.

The mobile phone 30 includes an input unit 2 and a control unit 3.
The display unit 4, the earpiece 5, the audio processing unit 6, the modulation / demodulation unit 7, the wireless unit 8, the antenna 9, the hinge control unit 10, and the mechanical earpiece state detection unit 31.

In the mobile phone 30, the mobile phone 1
The same elements as those of 1 are denoted by the same reference numerals and detailed description thereof will be omitted.

The appearance of the mobile phone 1 is as shown in FIG. The mobile phone 1 includes a housing 11 and a hinge portion 12.
With.

The mechanical earpiece state detector 31 determines whether the earpiece 5 is pulled out from the hole 11b.
It is detected whether or not it is accommodated in the hole 11b, and the detection result is supplied to the control unit 3. According to the detection result, the control unit 3 turns on the hook when the earpiece 5 is housed in the hole 11b, and turns off when the earpiece 5 is pulled out from the hole 11b.

The mechanical earpiece state detector 31 is shown in FIG.
Further, as shown in FIG. 8, a switch pressing portion 32 and a state detection switch 33 are provided.

The switch pressing portion 32 is attached to the hinge portion 12. In the present embodiment, when the earpiece 5 is housed in the hole portion 11b, the state detection switch 33 is pressed down so that the earpiece 5 is removed from the hole portion 11b. The state detection switch 33 is attached so as to be in a released state when pulled out. Specifically, the switch pressing unit 3
2 is attached to the end 12a of the hinge portion 12 so as to project in a direction substantially perpendicular to the longitudinal direction of the hinge portion 12.

The state detection switch 33 is depressed when the earpiece 5 is housed in the hole 11b, and is released when the earpiece 5 is pulled out from the hole 11b. Information on whether or not the state detection switch 33 is pressed is supplied to the control unit 3.

In the mechanical earpiece state detection unit 31 and the control unit 3, the signal flow when the earpiece 5 is pulled out from the hole 11b and when the earpiece 5 is housed in the hole 11b is as described below. Become.

When the earpiece 5 is housed in the hole 11b, first, the switch pressing portion 32 presses the state detection switch 33 as shown in FIG. 8 (A). Next, the information that the state detection switch 33 is pressed is supplied to the control unit 3. Then, the control unit 3 determines that the earpiece 5 is housed in the hole 11b based on the information that the state detection switch 33 is pressed down, and sets the mobile phone 30 on hook.

When the earpiece 5 is pulled out from the hole 11b, first, as shown in FIG. 8B, the switch depressing section 32 does not depress the state detection switch 33 to bring it into the released state. Next, the information that the state detection switch 33 is released is supplied to the control unit 3. And
The control unit 3 determines that the earpiece 5 is pulled out from the hole 11b based on the information that the state detection switch 33 is released, and sets the mobile phone 30 to off-hook.

The mobile phone 30 described above is provided with the mechanical earpiece state detection unit 31, and when the earpiece 5 is pulled out from the hole 11b, it goes off-hook.
When the earpiece 5 is housed in the hole 11b, it goes on hook. Therefore, the mobile phone 30 does not need to operate the earpiece 5 and the hook key,
It is easy to handle.

The mechanical earpiece state detection unit 31
Mechanically detects whether or not the earpiece 5 is housed in the hole 11b.
It may be electrically detected whether or not it is housed in. Hereinafter, the earpiece 5 will be described with reference to FIGS. 9 and 10.
A mobile phone 41 equipped with a magnetic earpiece state detection unit 40 for electrically detecting whether or not is stored in the hole 11b will be described.

As shown in FIG. 9, the mobile phone 41 has the same structure as the mobile phone 30 except that it has a magnetic earpiece state detecting section 40 instead of the mechanical earpiece state detecting section 31. Has been done.

The magnetic earpiece state detector 40 includes a magnet 42 and a magnetic sensor 43. The magnet 42 is provided on the side surface of the earpiece 5, and the magnetic sensor 43 is provided in the hole 11b of the housing 11. The magnet 42 and the magnetic sensor 4
3, the earpiece 5 has a hole 11b as shown in FIG.
It is preferable that they are provided at positions facing each other when they are housed in.

In the magnetic earpiece state detection unit 40 and the control unit 3, the signal flow when the earpiece 5 is pulled out from the hole 11b and when the earpiece 5 is housed in the hole 11b is as described below. Become.

When the earpiece 5 is housed in the hole 11b, the magnet 42 and the magnetic sensor 43 are close to each other as shown in FIG.
The magnetic field generated from the Therefore, the magnetic sensor 43 supplies the magnetic field detection signal to the control unit 3. Control unit 3
Is supplied with the magnetic field detection signal, it is determined that the earpiece 5 is housed in the hole 11b, and the mobile phone 40 goes on-hook.

When the earpiece 5 is pulled out from the hole 11b, the magnet 42 is drawn as shown in FIG. 10 (B).
In order to move to a position away from the magnetic sensor 43,
The magnetic sensor 43 cannot detect the magnetic field generated from the magnet 42. Therefore, the magnetic sensor 43 does not supply the magnetic field detection signal to the control unit 3. Since the magnetic field detection signal is not supplied, the control unit 3 determines that the earpiece 5 has been pulled out from the hole 11b, and sets the mobile phone 40 off hook.

[0075]

According to the portable communication terminal device of the present invention, a bone conduction microphone for detecting the vibration of bone caused by utterance and converting it into an electric signal and a speaker for outputting a voice are integrated, The transmitter / receiver has a shape that can be worn on a human ear. The transmitting and receiving means is in a state of being projected from one main surface of the housing by being operated,
It can be worn on the ear of a person. In a mobile communication terminal according to the present invention, when a user attaches and receives a voice transmitting and receiving means to make a voice call and speaks, a bone conduction microphone detects vibration of the ear bone accompanying the vocalization and converts it into an electric signal. To do.

In the mobile communication terminal according to the present invention, since the transmitter / receiver is mounted on the ear, the sensitivity to ambient noise is extremely low.

Further, the portable communication terminal device according to the present invention is
The transmitter / receiver unit is provided so as to be accommodated in the hole of the housing. That is, the mobile communication terminal device, by accommodating the transmitter / receiver in the hole of the housing when not in a voice call,
For example, it is possible to avoid the inconvenience that occurs when carrying the device.

Therefore, the portable communication terminal device to which the present invention is applied has a good quality of voice to be transmitted even when a voice call is made in a place where the surrounding noise level is high, and when carrying it. There are few inconveniences that occur, and handling is simple.

Further, the portable communication terminal device according to the present invention is
When the transmitter / receiver unit is operated to project from the main surface of the housing, a voice call can be established by connecting to the line.

Therefore, the mobile communication terminal device according to the present invention is capable of simultaneously performing the operation of operating the transmitting / receiving means and the operation of connecting the line when making a voice call, and the handling is simple. It will be

[Brief description of drawings]

FIG. 1 is a block diagram of a mobile phone to which the present invention is applied.

FIG. 2 is a plan view of the mobile phone.

FIG. 3 is an enlarged cross-sectional view of a main part of the mobile phone.

FIG. 4 is a plan view of another mobile phone to which the present invention is applied, in which an earpiece housing method is different.

FIG. 5 is an enlarged cross-sectional view of a main part of another mobile phone to which the present invention is applied, in which a method for accommodating an earpiece is different.

FIG. 6 is a block diagram of still another mobile phone to which the present invention is applied, the mobile phone including a mechanical earpiece state detection unit.

FIG. 7 is a plan view of the mobile phone.

FIG. 8 is an enlarged perspective view of an essential part for explaining a mechanical earpiece state detection part.

FIG. 9 is a plan view of still another mobile phone to which the present invention is applied, the mobile phone including a magnetic earpiece state detection unit.

FIG. 10 is an enlarged perspective view of an essential part for explaining a magnetic earpiece state detection part.

FIG. 11 is a plan view of a conventional mobile phone.

FIG. 12 is a schematic view showing an earphone type bone conduction microphone.

FIG. 13 is a schematic diagram for explaining a mobile phone equipped with a conventional bone conduction microphone.

[Explanation of symbols]

1 mobile phone, 5 earpieces, 9 antennas, 11
Case, 12 hinges

Claims (4)

[Claims] 1. In a mobile communication terminal device capable of voice communication, a bone conduction microphone that detects a vibration of bone caused by vocalization and converts it into an electric signal, and a speaker that converts the electric signal into sound and outputs the sound. Is integrated, and the transmitting / receiving means having a shape that can be worn on a human ear, and the transmitting / receiving means can be housed in a hole provided in a casing, and Holding means for movably holding it so as to be in a state of protruding from the one main surface of the housing, and the transmitting / receiving means is in a state of protruding from the one main surface of the housing. The bone conduction microphone can be mounted on a human ear, and when the user utters with the transmitting / receiving means attached to the ear, the bone conduction microphone detects vibration of the otic bone caused by utterance. Mobile communication terminal device. 2. The mobile communication terminal device according to claim 1, wherein said holding means holds said transmitting / receiving means so as to be rotatable. 3. The portable communication according to claim 1, wherein the holding means holds the transmitting / receiving means so as to be movable in a direction substantially perpendicular to one main surface of the housing. Terminal device. 4. A state detecting means for detecting that the transmitter / receiver unit is in a state of protruding from one main surface of the housing, and the transmitter / receiver unit is in a state of protruding from the one main surface of the housing. 2. When it is detected, a control means for connecting to a line to enable a voice call is provided.
The mobile communication terminal device described.