JPH03162024A - Portable telephone set - Google Patents

Abstract

PURPOSE:To attain miniaturization by providing a speaker for reception and a means converting an infrared-ray signal from a main body unit into a voice signal and sending the signal to the speaker and providing the reception unit removable to the main body unit. CONSTITUTION:A main body 20 and a reception unit 10 are removed freely, and a microphone 26 for transmission, a circuit for radio communication and a means converting the reception signal from the circuit into an infrared-ray signal and sending the signal are provided to the main body unit 20, and a mean converting the infrared ray signal from the transmission speaker 11 and the main body unit 20 into a voice signal and sending to the speaker 11 is provided to the reception unit 10. Thus, the main body unit 20 and the reception unit 10 are separated and they are faced to the mouth and the ear of the user respectively to attain talking and miniaturization.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a portable mobile phone.

2. Description of the Related Art Conventionally, this type of mobile phone is known to be equipped with a speaker and a microphone in a case similar to that of a normal telephone handset, as well as circuits and dial keys necessary for wireless communication. This mobile phone has a speaker and a microphone with a longitudinal size and shape that correspond to the user's ear and mouth, respectively, and the distance between them is determined by Nippon Telegraph and Telephone Corporation (NTT), CCTT, etc. Recommendations are presented.

In addition, other mobile phones are known that have a structure in which a portion of the mobile phone equipped with a microphone is foldable relative to other portions, and is folded during standby and unfolded during a call. In this case as well, the distance between the microphone and speaker when expanded is
This is close to the CITT recommendation.

Problems to be Solved by the Invention However, the above conventional mobile phone has a problem in that there is a limit to miniaturization because the speaker and microphone are installed in the housing so as to correspond to the user's ear and mouth, respectively. .

SUMMARY OF THE INVENTION In view of the above conventional problems, it is an object of the present invention to provide a mobile phone that can be downsized.

Means for Solving the Problems In order to achieve the above object, the present invention makes the main body unit and the receiving unit detachable, and includes a microphone for transmitting speech,
The main unit is equipped with a circuit for wireless communication and a means for converting the receiving signal from this circuit into an infrared signal and sending it out, and a speaker for receiving calls and a means for converting the infrared signal from the main unit into an audio signal. The receiving unit is equipped with means for transmitting the signal to the speaker.

Effects According to the present invention, with the above configuration, the main unit and the receiving unit are separated and placed to face the mouth and ears of the user, respectively, thereby making it possible to make a telephone call, and therefore, the device can be miniaturized.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1st
2 is a front view of the mobile phone of FIG. 1, FIG. 3 is a right side view of the mobile phone of FIG. 1, FIG. 4 is a block diagram showing the mobile phone shown in FIG. 1, and FIG. 5 is an explanatory diagram showing how the mobile phone shown in FIG. 1 is used.

FIG. 1 shows a state in which the receiving unit 10 and the main unit 20 are attached, and FIG. 2 shows a state in which the receiving unit 10 and the main unit 20 are separated.

In FIGS. 1 and 2, a receiving unit 10 is equipped with a speaker 11 for receiving calls on the front thereof, and a main unit 20 is separable from the receiving unit 10, and receives the received voice by infrared rays. Send to.

A substantially rectangular parallelepiped recess 12 is formed below the receiving unit 10, and infrared photodiodes 13a and 13b are attached to both ends of the bottom surface of the recess 12. Recess 12
Also on the bottom surface of the inside is a terminal 14a for receiving charging power from the main unit 20. 14b and main unit 2
0, the charging power source from the zero body unit 20 is connected to the built-in battery (described later), and when it is separated from the main unit 20, the built-in battery is connected to the internal circuit (described later). A switch 15 is attached.

In addition, locking holes 16a and 16b for attaching to the main body unit 20 are provided in both side walls forming the recess 12, respectively.
is formed.

As shown in FIG. 2 and FIG.
7 is attached so that it can be stored, and when making a call, it can be pulled out from the receiver unit 10 and placed in the ear of the user, as shown in Figure 3.
It can be locked to.

A convex portion 21 is formed above the main unit 20 to correspond to the concave portion 12 of the receiver unit 10, and an infrared LED 22 is formed at one end of the convex portion 21 to correspond to the infrared photodiode 13a of the receiver unit 10. is provided. The convex portion 21 also includes a power terminal 23a for supplying power to the power terminals 14a and 14b of the receiving unit IO.
, 23b are attached, and the power terminals 14a. 14b,2
3a and 23b are urged to be pressed.

A locking hole 1 for the receiver unit 10 is provided on both side walls of the recess 21.
6a and 16b are provided with locking pieces 24 and 25 that can be engaged with each other, and when the operation surface 25a is pressed, the locking pieces 25
When rotated about the shaft 25b, it is configured to undergo elastic deformation and come off from the locking hole 16b. Therefore, the user can check the locking holes 16a, 16b and the locking piece 24.
, 25, the receiving unit 10 and the main unit 20 can be separated.

Note that the attachment/detachment mechanism between the receiving unit 10 and the main body unit 20 is not limited to these mechanisms. For example, as in a car phone, the handset and the main body are biased by a spring to be detachable, and vibrations can be removed. It is possible to use a device with a structure that prevents the handset from being disconnected from the handset.

A microphone 26 for transmitting speech is attached to the lower center of the main unit 20, and infrared LEDs 27a and 27b are attached to both sides of the lower end surface, respectively. Therefore, as shown in FIG.
When the zero and main unit 20 are separated and the zero body unit 20 is turned upside down, the infrared LEDs 27a and 27b are connected to the infrared photodiodes 1 of the receiving unit 10, respectively.
3a and l3b face each other.

As shown in FIG. 2, on the front of the main unit 2o, a key group 28 consisting of various function keys including a dial key and a hook switch key, and a rectangular display 29 for displaying dial numbers, etc. are attached. , the display 29 is
It is arranged along the vertical direction of the main unit 20 so as to be vertically elongated, and on the right side when the receiving unit 10 and the main unit 20 are attached. 30
is a battery that can be charged by an external power source such as a charger and supplies power to the internal circuit (?&description) of the main unit 20.

Next, the circuit configuration of the mobile phone will be explained with reference to FIG.

The main unit 20 includes a central processing unit (CPU) 4l that controls the entire mobile phone, particularly detects the operation status of the key group 28, and controls the display of the two displays, and a An antenna 42, a duplexer 43 for using the antenna 42 for both transmission and reception, an RF stage 44 for converting the received signal to a low frequency, an amplifier 45 for amplifying the audio signal, and converting the audio signal into a digital signal. is converted into an infrared signal, and the infrared LED 22, 2
It has a modulator 46 etc. for driving 7a and 27b.

The main unit 20 also includes an amplifier 49 that amplifies the audio signal from the microphone 26, an RF stage 48 that converts the audio signal into a high frequency, and a power amplifier 49 that amplifies the high frequency.
and a synthesizer (SYN') for performing MCA communication.
50 etc. Therefore, since the power amplifier 49, which consumes the most power in a mobile phone, is provided in the main unit 20, the power consumption of the receiving unit IO can be reduced.

The receiving unit 10 includes an infrared photodiode 13a,
13b, a demodulator 52 that converts the signal received via the analog signal into an analog signal and demodulates it into an audio signal, an amplifier 53 that amplifies the audio signal and outputs it to the speaker 11, and a battery 54 that serves as a power source for these circuits. etc. When the receiving unit 10 is attached to the main unit 20, the battery 54 is connected to the charging terminals 23a, 23b, 14a,
14b, and is charged via the switch 15, and when the receiver unit 10 is separated from the main unit 20, power is supplied to the internal circuit via the switch 15.

Next, the operating method of the above embodiment will be explained with reference to FIG.

First, in the standby mode, as shown in FIG. 5(a), the receiving unit 10 and the main unit 20 are attached and can be carried in a pocket, a handbag, or the like.

Here, as shown in FIG. 5(b), the user places the speaker 11 of the receiving unit 10 near the ear when receiving a call,
By placing the microphone 26 of the transmitting unit 20 near the mouth, it is possible to make a call, so even if the speaker 11 and the microphone 26 are separated, it is possible to make a call as is. Therefore, the device can be made smaller. Can be done.

Further, as shown in FIG. 5(c), when the receiver unit 10 and the main unit 20 are separated during a call, the user can
A call is made by placing the receiving unit 10 against the ear with the left hand, for example, and holding the main unit 20 upside down with the right hand as shown in FIG. 5(d), with the microphone 26 facing upward. be able to. In this case, indicator 2
One is disposed on the left side of the main unit 20 in the vertical direction.

Furthermore, the user can attach the ear ring l7 of the receiving unit 10.
By pulling out the receiver unit 10, you can hang the receiver unit 10 over your ear, so you can use the hand that holds the receiver unit 10 freely.Also, by storing the main unit 20 in your pocket, you can hang the main unit 20 around your ear. You can use your hand freely. In this case, since the display 29 is placed on the left side of the zero-body unit 20 along the vertical direction, when a right-handed user removes the main body unit 20 from his pocket, the characters displayed on the display 29 is not upside down.

In the above embodiment, charging and power supply of the internal battery 54 are switched only by the switch 15 in the receiving unit 10, but when a call start signal or receiving signal is received from the main unit 20, the battery 54 is An electronic switch for switching to the power supply side may be separately provided. in this case,
Receiving unit 1 even though the user is not on a call
When 0 is separated, consumption of the battery 54 can be prevented.

Effects of the Invention As explained above, the present invention has a main body unit and a receiving unit that are detachable, a microphone for transmitting speech, a circuit for wireless communication, and a receiving signal from this circuit that is converted into an infrared signal. The main unit is equipped with a means for transmitting signals, a speaker for receiving calls, and a means for converting an infrared signal from the main unit into an audio signal and transmitting it to the speaker. By separating them and placing them facing the user's mouth and ears, respectively, it is possible to make a telephone call, and the device can therefore be made smaller.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of the mobile phone according to the present invention, FIG. 2 is a front view of the mobile phone shown in FIG. 1, and FIG. 3 is a right side view of the mobile phone shown in FIG. 1. 4 is a block diagram showing the mobile phone shown in FIG. 1, and FIG. 5 is an explanatory diagram showing how the mobile phone shown in FIG. 1 is used. 10... Receiving unit, 1l... Speaker, l3a
, 13b... Infrared photodiode, 14a, 14
b. 23.23b... Power terminal, 15... Switch, 16a, 16b... Locking hole, 17... Ear hook ring, 20-... Main unit, 22, 27a. 27b
... Infrared LED, 24.25 ... Locking piece, 26.
...Microphone, 28...Key group, 29...Display, 30, 54...Battery.

Claims (4)

[Claims] (1) A main unit including a microphone for transmitting speech, a circuit for performing wireless communication, a means for converting a reception signal from the circuit into an infrared signal and transmitting the same, a speaker for receiving speech, and the main unit. A mobile phone comprising means for converting an infrared signal from a computer into an audio signal and transmitting the signal to the speaker, the mobile phone having the main unit and a detachable receiver unit. (2) The mobile phone according to claim 1, wherein the receiver unit includes two infrared photodiodes to have a redundant configuration. (3) The main unit has one infrared LE mounted so as to face one of the two infrared photodiodes when the receiver unit is attached.
Claim (2), further comprising two infrared LEDs attached to face each of the two infrared photodiodes in a state where the receiving unit is separated and the main unit is arranged in opposite directions. mobile phone. (4) The main unit includes a vertically elongated display placed on the right side along the vertical direction of the main unit when the receiving unit is attached, and when the receiving unit is separated and the main unit is turned upside down. The mobile phone according to any one of claims 1 to 3, wherein the mobile phone is placed on the left side of the main unit in the vertical direction.