JPH0993318A - Portable telephone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce surrounding environmental noise when the telephone set is used as a portable telephone set and to attain memo recording without any modification when the telephone set is folded into two. SOLUTION: A 2nd casing 101 having an opposite face 101 is hinged with a 1st casing 100 having an opposite face 100a by a hinge 102. A 1st receiving microphone 26 receives voice from directions of an opening 104 provided to the opposite face 101a of a 2nd case 101 and a 2nd receiving microphone 28 receives voice from directions of an opening 107 provided to the face 101b opposite to the opposed face. The 1st and 2nd reception microphones 26, 28 are added differentially to reduce environment noise. When the casings 100, 101 are set close by approaching the opposed faces to cause a 2-fold state, a casing opening/closing detection means is used to activate a changeover means thereby stopping the 1st receiving microphone 26 and activating only the 2nd receiving microphone 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact portable telephone device having a voice recording function.

[0002]

2. Description of the Related Art In recent years, portable telephone devices have been miniaturized year by year in order to improve portability, and on the other hand, ease of use and high functionality have been pursued. In this trend, it is necessary to ensure both the absolute distance between the human ear and the mouth and the miniaturization of the housing. A message memory (voice recording) function is an example of a function that pursues higher functionality. This is a function to record voice instead of a memo, and when the user comes up with something, by holding the mobile phone device and talking to the microphone for call, the content to be recorded is the same as in a normal call. The sound is recorded in the internal memory. A portable telephone device with a message memory function of the above-mentioned conventional example will be described below with reference to the drawings. FIG. 6 is a block diagram of a mobile phone device showing an example in which a voice recording function is combined with a conventional personal handy phone (PHS), and FIG. 7 is an external perspective view of the same mobile phone device.

First, the personal handy phone portion will be described with reference to FIG. The PHS transmission / reception antenna 1 is connected to the antenna switch 2, and the output of the antenna switch 2 is the reception high frequency amplification circuit 3, the first frequency conversion circuit 4, the first intermediate frequency amplification circuit 5, the second frequency conversion circuit 7, and the second frequency conversion circuit 7. It is connected to the ear speaker 12 via the intermediate frequency amplifier circuit 8, the modem section 9, the channel codec 10, and the ADPCM codec 11. On the other hand, the output of the ADPCM codec 11 is input to the antenna switch 2 via the channel codec 10, the modem section 9, the quadrature modulation circuit 18, the frequency conversion circuit 17, and the output amplification circuit 14.

On the other hand, the output of the reference frequency oscillation circuit 21 is the modem section 9, the channel codec 10, and the second local oscillation PL.
It is input to the L circuit 20 and the first local oscillation PLL circuit 16. The output of the second local oscillation PLL circuit 20 is input to the second local oscillation VCO 19 to generate the second local oscillation VCO 19.
The output of the CO 19 is input to the quadrature modulation circuit 18 and the second frequency conversion circuit 7. First local oscillation PLL circuit 16
Is input to the first local oscillation VCO 15, and the output of the first local oscillation VCO 15 is input to the first frequency conversion circuit 4 and the frequency conversion circuit 17 via the local oscillation switching circuit 6. The function of the entire device is the mobile phone control means 2
5.

Regarding the voice recording portion, the output of the receiving microphone 13 is input to the voice recording means 22, which is connected to the storage means 23 and the recording control means 24.
The ear speaker 12 and the ADPCM codec 11 are also connected.

Next, in FIG. 7, the housings 100 and 101, which are divided into two, are integrated by a hinge portion 102 and are rotatably supported with each other, and the housings are opposed to each other by facing surfaces 100a and 101a. Can be folded close to each other. FIG. 7A shows a state in which the housing is opened, and FIG. 7B shows a state in which the housing is folded in two. The housing 100 is provided with an ear speaker (earpiece) opening 103 and an antenna 106, and the housing 101 is provided with a microphone opening 10.
4. A key operation unit 105 is provided.

With the above-mentioned configuration, the operation will be described. At the time of reception, the antenna 1 is connected to the reception high frequency amplifier circuit 3 by the antenna switch 2. The output of the first local oscillation VCO 15 is input to the first frequency conversion circuit 4 by the local oscillation switching circuit 6. The received signal is frequency-converted twice by the first frequency conversion circuit 4 and the second frequency conversion circuit 7, converted into the second intermediate frequency, amplified by the second intermediate frequency amplification circuit 8, and then the modem section. The signal is demodulated in 9, converted into an ADPCM signal in the channel codec 10 according to the communication protocol, and converted into a voice signal in the ADPCM codec 11.

At the time of transmission, on the contrary, the voice signal input to the receiving microphone 13 is AD-converted by the ADPCM codec 11.
The data is converted into a PCM signal, data conversion is performed by the channel codec 10 according to the communication protocol, and the data is quadrature-modulated by the quadrature modulation circuit 18 into the second intermediate frequency signal. The local oscillation switching circuit 6 is switched to the frequency conversion circuit 17 side, where it is converted to a transmission frequency, then power amplified by the output amplifier circuit 14, and supplied to the antenna 1 via the antenna switch 2 to be transmitted.

Usually, the second local oscillation frequency is fixed and the same frequency is used during transmission and reception. On the other hand, the first local oscillation frequency differs between the transmission and the reception by the second intermediate frequency.

Usually, the oscillation frequency of the reference frequency oscillation circuit 21 is the same as that of all the reference clocks of the first local oscillation PLL circuit 16, the second local oscillation circuit PLL circuit 20, the modem circuit 9 and the channel codec circuit 10. A frequency that is an integral multiple is selected, and the reference oscillation circuit is shared.
In the case of a personal handy phone, the first local oscillation PLL1
Reference frequency of 6 is 300 kHz, second local oscillation PLL2
The reference frequency of 0 is 50 kHz, and 384 kHz is required as a modulation / demodulation reference clock due to its modulation format, so 19.2 MHz is usually selected.

The voice recording means 22 is the receiving microphone 1
When analog audio data is input from 3, it is converted into digital data based on the specified format,
It is recorded in the storage means 23. Also, when digital data is input from the ADPCM codec 11, data conversion processing is performed and the data is recorded in the storage unit 23. Normally, the ADPCM method is used as a digitization method.
The voice recording means 22 is controlled by the mobile phone control means 25 and the recording control means 24 for recording and reproduction. When the user wants to leave the voice of the user himself / herself as a memo by switching the input, the call is made by recording the input from the receiving microphone 13 and by recording the signal from the ADPCM codec 11. It is also possible to record the voice of the opponent inside.

When the mobile phone device is used, the housings 100 and 1
Hold 01 and rotate it around hinge 102 as an axis,
The absolute distance between the ear-speaker (earpiece) opening 103 and the microphone opening 104 is ensured so that the earpiece and the mouthpiece are placed in the ear and mouth, respectively.
When it is not used, the housings 100 and 101 are folded in two around the hinge 102, and the length is such that it can be stored in a pocket, which is convenient for carrying.

[0013]

When the portable telephone device having the structure that can be folded in two of the conventional example described above is provided with this voice recording function, the receiving microphone cannot be used as a telephone unless the housing is open. , Of course, they are installed on the side of the surfaces that contact each other when folded in two. Therefore, if you try to record something that you thought up with the mobile phone device with such a shape using the message memory function, take out the mobile phone device from the pocket etc. each time, and fold the housing from the folded state. There was a problem that the operation of unfolding was necessary.

An object of the present invention is to provide a portable telephone device having a message memory function capable of operating the message memory function even when folded in half. To do.

[0015]

In order to achieve the above-mentioned object, the mobile phone device of the present invention has a first construction in which a first housing having an opposing surface and the first housing having an opposing surface are provided. A second housing which can be in a folded state in which the housing and the housing are joined together via a support shaft so that the facing surface approaches the facing surface of the first housing, and the facing surface is separated from each other, and the second housing. A first receiving microphone whose sound receiving surface is directed to the facing surface side of the second receiving microphone, and a second receiving microphone whose receiving surface is directed to a surface different from the facing surface of the second housing; Detecting means for detecting that the facing surfaces of the first and second housings have come close to each other and are in a half-folded state, and the output of the first receiving microphone is stopped based on the half-folded state detection result of the detecting means. Between the inoperative means and the outputs of the first and second receiving microphones. And it has a differential summing means for adding.

The second structure eliminates the detecting means and the non-operating means from the first structure, and instead of the first and second structures.
The first housing is provided with a soundproof material that prevents voice input to the first microphone for reception when the facing surfaces of the housing are brought close to each other and folded into two.

In the third structure, the detecting means and the non-operating means are eliminated from the first structure, and instead, the facing surfaces of the first and second casings are brought close to each other to be folded in two. One or both of the first and second housings is provided with a notch so that a voice can be input to the first microphone for reception.

[0018]

According to the present invention, in the above-mentioned first configuration, when used as a mobile phone, the first and second microphones for reception work together, and the outputs thereof are differentially added by the differential addition means to reduce environmental noise. It is possible to attenuate the call voice clearly, and when the facing surfaces of the first and second housings approach each other and are folded into two, the detecting means detects this and does not operate. The means serves to stop the first microphone output for reception and to output only the second microphone output for reception to the differential addition means.

Further, in the second structure of the present invention, when used as a mobile phone, the first and second microphones for reception work together, and the outputs thereof are differentially added by the differential addition means, whereby environmental noise is reduced. It is possible to attenuate the call voice clearly, and when the facing surfaces of the first and second casings come close to each other and are folded in two, the soundproof material provided in the first casing makes the first Of the second receiving microphone, and outputs only the second receiving microphone output to the differential adding means.

Further, the present invention is the above-mentioned third structure,
When used as a mobile phone, the first and second microphones for reception work together, and the outputs thereof are differentially added by the differential addition means to attenuate environmental noise and clearly collect the call voice. Also, when the facing surfaces of the first and second housings approach each other and are folded into two, the first microphone for receiving from the notch provided in either or both of the first and second housings. The sound enters and acts so as to reduce the environmental noise even in the folded state.

In any of the configurations, if the user wants to record his own voice, it can be recorded without expanding the housing.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a mobile phone device of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a mobile phone device of an embodiment of the present invention showing an example in which a voice recording function is combined with a personal handy phone, FIG. 2 is an external view of the same mobile phone device, and FIG. 2 is an external perspective view of FIG. 2B, and FIG.
(C) is a perspective view for explaining the attachment of the receiving microphone. Parts having the same functions as those of the conventional example shown in FIGS. 6 and 7 are designated by the same reference numerals, and detailed description thereof will be omitted.

1 differs from the conventional example shown in FIG. 6 in that an amplifier circuit 27 for amplifying the output of the first receiving microphone 26, an amplifier 29 for amplifying the output of the second receiving microphone 28, an amplifier 27, The differential amplifier circuit 30, which is a differential addition means for inputting the output of 29 to output to the audio amplification means 22, a switching means 31 for switching between operation and non-operation of the amplifier circuit 27, and a casing for operating this switching means 31. This is the point where the open / close detection means 32 is added. The receiving microphone 26 and the receiving microphone 28 are shown in FIG.
As shown in FIG. 2, the sound receiving surfaces are arranged on the opposite sides to each other, and the receiving microphones 26, 28 of the housing are arranged.
Openings 104 and 107 such as slits and holes are provided at positions corresponding to the sound receiving surface side of the. Case 10
Even if you fold it in half, start recording on the part exposed to the outside,
A recording control key 108 for controlling the end and the like is provided.

The operation of the portable telephone device configured as described above will be described below. When used as an ordinary mobile phone, the receiving microphones 26 and 28 and the amplifier circuits 27 and 29 are operating. As shown in FIG. 2, the receiving microphone 26 is a housing 10 that is folded in two.
On the side of the facing surface 101a where 0 and 101 are in contact with each other, that is, on the side facing the mouth of the user, the receiving microphone 28 has the sound receiving surface facing away from the mouth of the user of the mobile phone device. The direction of the sound receiving surface of the receiving microphone 28 does not necessarily have to be the opposite direction, but may be any position such as the side surface of the housing 101 where the sound can be heard when folded in two. Figure 2 (c)
The perspective view of Figure 3 shows the structure of that part. An opening 104 is provided for the first receiving microphone 26, and an opening 107 is provided for the second receiving microphone 28. The voice signals input from the receiving microphones 26 and 28 are amplified by the amplifier circuits 27 and 29, respectively, and are added in anti-phase by the differential amplifier circuit 30 which is a differential addition means. When the respective signal components are compared, the level of the voice signal of the user on the side of the receiving microphone 28 facing the mouth of the user is much higher than that on the side of the receiving microphone 26. On the other hand, the ambient environmental noise is basically generated from a source far away from the distance between the respective receiving microphones, and the induced signal level due to the environmental noise in the receiving microphones 26 and 28 is almost the same. Will be equivalent. Therefore, with such a configuration, it is possible to reduce the level of ambient noise and transmit clear voice.

Further, when the mobile phone is folded in two for carrying, the housing open / close detection means 32 detects that it is folded in two, and the switching means 32 for switching between the operation and non-operation of the amplifier circuit 27 causes the amplifier circuit 29 to operate. Inactive state.
Even in this state, the receiving microphone 28 has a sound receiving surface facing the outside of the housing, and as shown in FIG.
07 cannot be closed. Therefore, by providing the key 108 for recording control shown in FIG. 2B, a switch, or the like at a position which becomes the outer surface of the housing in this state, the mobile phone is taken out of the pocket or the like each time the voice memory is used as in the conventional case. , It becomes unnecessary to open the housing from the folded state. The housing opening / closing detection means 31 may be of any type such as a mechanical switch or a non-contact electric switch, and its structure is not particularly limited. Further, instead of stopping the operation of the amplifier 27, the operation of the receiving microphone 26 may be stopped. Further, the housing opening / closing detection means 32 and the switching means 3
It does not matter if it is integrated with 1.

Although the present embodiment has been described by using the configuration of the personal handyphone, the present invention is not limited to the personal handyphone system and can be applied to all portable wireless devices using other systems. it can.

An external view of the second embodiment is shown in FIG. 3 and a sectional view thereof is shown in FIG. The opening 104 of the housing 101 of the first housing 100 that abuts the opening 104 for the first receiving microphone 26 of the second housing 101 when folded in two.
Soundproof material such as soft rubber or felt on the part facing
If 08 is attached and the soundproof material prevents the voice from reaching the first receiving microphone 26 when folded in half, the same effect as in the first embodiment can be obtained, and in this case, as shown in FIG. The operation / non-operation switching means 31 and the housing open / close detection means 32 are not necessary, and the amplifier 27 is always operating.

Further, as a third embodiment, a cutout is provided in a part of the first or second housing so that sound can enter through the cutout, and the operation / non-operation switching means 31 and the housing shown in FIG. 1 are provided. The amplifier 27 may be always operated without the open / close detection means 32. A cross-sectional view of this embodiment is shown in FIG. In the embodiment of FIG. 5, notches 110 and 111 are provided on the housing 100 side. In this case, it is possible to reduce environmental noise during a mobile phone call as in the above embodiment and also during the operation of the message memory function.

[0029]

As described above, the portable telephone device of the present invention has, as a basic configuration, the first casing having the facing surface,
A second casing having a facing surface and a first housing which is united with a supporting shaft so that the facing surface is in a two-fold state in which the facing surface approaches the facing surface of the first housing and the facing surface is separated from each other; , A first receiving microphone whose sound receiving surface is directed to the facing surface side of the second housing, and a second receiving microphone whose receiving surface is directed to a surface different from the facing surface of the second housing Microphone and first and second
Detecting means for detecting that the opposite surfaces of the housings have come close to each other to be in a half-folded state, and inoperative means for stopping the output of the first receiving microphone by the detection result of the half-folded state of the detecting means, And the differential addition means for differentially adding the outputs of the second receiving microphones, the ambient noise is reduced at least when the mobile phone is used as a mobile phone, and when it is folded in two. Realizes both the convenience of being able to record a memo as it is.

[Brief description of drawings]

FIG. 1 is a block diagram of a mobile phone device combined with a voice recording function according to an embodiment of the present invention.

[Fig. 2] Similarly, its external view

FIG. 3 is an external view of a second embodiment of the present invention.

FIG. 4 is a sectional view of a second embodiment of the present invention.

FIG. 5 is a sectional view of a third embodiment of the present invention.

FIG. 6 is a block diagram of a mobile phone device in which the voice recording function of the conventional example is combined.

[Fig. 7] Similarly, its external view

[Explanation of symbols]

 22 voice recording means 23 storage means 24 recording control means 25 mobile phone control means 26 first receiving microphone 27, 29 amplifier 28 second receiving microphone 30 differential amplifier 31 operation / non-operation switching means 32 case opening / closing detection Means 100 First housing 100a, 101a Opposing surface 101 Second housing 102 Hinge 104, 107 Opening 108 Recording control key 109 Ear speaker

Claims (4)

[Claims] 1. A first housing having a facing surface, and a double fold having a facing surface and being merged with the first housing via a support shaft so that the facing surface approaches the facing surface of the first housing. A second housing that can be in a state in which the two facing surfaces are separated from each other, a first receiving microphone whose sound is directed to the facing surface side of the second housing, and a facing of the second housing. Detection for detecting that the second reception microphone whose reception surface is directed to a surface different from the surface and the facing surfaces of the first and second housings are close to each other and are folded into two Means, a non-operating means for stopping the output of the first reception microphone according to the detection result of the folded state of the detection means, and a differential addition means for differentially adding the outputs of the first and second reception microphones. And a mobile phone device having. 2. A first housing having a facing surface, and a double fold having a facing surface and being united with the first housing via a support shaft so that the facing surface approaches the facing surface of the first housing. A second housing that can be in a state in which the opposite surfaces are separated from each other; a first microphone for receiving a sound with a sound receiving surface facing the opposite surface side of the second housing; and a second housing of the second housing. A second receiving microphone whose receiving surface is directed to a surface different from the facing surface; and a second receiving microphone provided in the first housing, and the facing surfaces of the first and second housings approach each other and are folded in two. A mobile phone having a soundproof material that blocks voice input to the first microphone for receiving when the state is brought into a state, and a differential adding unit that differentially adds outputs of the first and second microphones for receiving. apparatus. 3. A first housing having a facing surface, and a double fold having a facing surface and being united with the first housing via a support shaft so that the facing surface approaches the facing surface of the first housing. A second housing that can be in a state in which the opposite surfaces are separated from each other; a first microphone for receiving a sound with a sound receiving surface facing the opposite surface side of the second housing; and a second housing of the second housing. A second receiving microphone whose receiving surface is directed to a surface different from the facing surface, and the second receiving microphone when the facing surfaces of the first and second housings approach each other and are folded in two. A notch provided in either or both of the first and second housings so that voice can be input to the first receiving microphone, and a difference for differentially adding the outputs of the first and second receiving microphones. A mobile phone device having a dynamic addition means. 4. The mobile phone device according to claim 1, further comprising a voice recording means for inputting an output of the differential addition means.