JPH0267854A - Cordless telephone set - Google Patents

Abstract

PURPOSE:To miniaturize a handset by providing a handset not with a push button dial switch but with only a microphone externally and connecting an earphone speaker to the handset. CONSTITUTION:A handset 2 is provided with a microphone 27 which is connected to a speech transmission part 21 and from which a voice to be transmitted to the speech destination is inputted and an earphone speaker 28 which is connected to a speech reception part 22 and from which the voice from the speech destination is outputted. A dial signal generator 3 provided with a push button dial switch 31, a dial signal oscillator 32, and a speaker 34 from which a dial tone is emitted is provided separatedly from the handset 2. Consequently, the shape of the handset 2 is not restricted by the push button dial switch 31 and the speaker 34, and the handset 2 is formed to such arbitrary shape that only the microphone 27 can be externally provided. Thus, the handset is miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a cordless telephone, and more particularly to a cordless telephone in which a dial signal oscillator is separated from a handset and the handset is miniaturized.

<Prior Art> In recent years, cordless telephones in which a handset and a base set are connected wirelessly have become popular. This type of cordless telephone has a handset with a built-in microphone and speaker, and a dial and function switch, allowing you to make telephone calls freely, literally without a cord, at a location away from the base set connected to the central office line. be able to.

<Problems to be Solved by the Invention> However, in conventional cordless telephones of this type, a dial is attached to the handset, and the built-in speaker and microphone are connected to the human ear, similar to the handset of a normal telephone. Because the handset is small enough to fit in your mouth, the built-in circuit components and batteries can be made smaller, but the handset is still large and weighs only 300g. Currently, it is heavier at ~500g.

For this reason, although it is possible to make calls while freely carrying a cordless handset, it is not easy to make calls while holding the handset for long periods of time, and there are problems in which the advantages of cordless telephones are not necessarily utilized. Ta.

Means for Solving the Problems> The present invention has been made to solve the above problems, and provides a cordless telephone that allows the handset to be extremely miniaturized and allows you to easily make calls without being aware of the handset. The purpose is to

For this purpose, the cordless telephone of the present invention has a central office line circuit connected to a central office line, a call transmitter, and a call receiver, and transmits and receives calls to and from the handset wirelessly while making calls to the central office line. A handset that has a base set for making and answering calls, a speaker and a microphone for calls, 8 parts for call volume, and a call transmission part, and that transmits and receives calls wirelessly between the base set and the base set via an antenna. In the cordless telephone, the handset is provided with a microphone connected to a call transmission section for manually outputting audio to be sent to the other party, and an earphone speaker connected to the call reception section for outputting audio from the other party, A dialing signal generator comprising a pushbutton dialing switch, a dialing signal oscillator, and a speaker for generating a pushbutton dialing tone is configured to be provided separately from the handset.

In such cordless telephones, when calling the other party, the push-button dial switch of the dial signal generator is operated to generate a push-button dial signal sound, and this signal sound is input into the handset's microphone. There is no push-button dial switch, only the microphone is provided externally, and the earphone speaker is connected to the handset, so the handset can be made much smaller than conventional shapes, making it easier to use the handset. You can make calls while holding it. Also,
The circuitry within the handset can be simplified, resulting in lower power consumption and longer battery life within the handset.

<Example> Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows an overall perspective view of a cordless telephone.

1 is a base set which has a central office line circuit connected to a central office line, a call transmitter, and a call receiver, and which makes and responds to the central office line while transmitting and receiving calls wirelessly to the handset 2; It is.

2 is a handset that has a speaker and a microphone for calling, a call receiving section, and a call transmitting section, and wirelessly transmits and receives calls to and from the base set 1 via an antenna. It is formed. Reference numeral 3 denotes a dial signal oscillator, which is configured to generate a predetermined push-button dial signal (hereinafter referred to as an FB signal) from a speaker 34 in response to the operation of the push-button dial switch 31.

The base set 1 includes a call transmitter 1 as shown in FIG.
1. A telephone call receiving unit 12, a central office line circuit 15 that is connected to the central office line and opens and closes the central office line, a bell receiving circuit 14 that receives a bell signal from the central office line, and performs control processing such as making and receiving telephone calls. The 0 call transmitter 11 is composed of a CPU 13 that performs
Consists of a bandpass filter, oscillator, FM modulator, etc.
The transmission output side is connected to the antenna 16, and outputs a specific frequency signal that is FM-modulated according to the call tone and data signal arriving via the office line to the antenna 16, and transmits it to the handset 2.

The call receiving unit 12 includes a bandpass filter, an RF amplifier,
It consists of a mixer, a local excavator, an intermediate frequency circuit, a demodulation circuit, a filter, etc., and is connected to the handset 2 via an antenna 16.
It receives and demodulates the transmission signal (call tone and data signal) from the CP, outputs the voice signal to the office line circuit 15, and outputs the data signal to the CP
Output to U13.

The CPU 13 is a one-chip CPU that includes a ROM and the like on the same chip, and performs control processing such as calling and receiving operations based on program data written in the ROM in advance. The office line circuit 15 receives a control signal from the cpui 3, closes or opens the office line, outputs a call signal from the office line to the call transmitter 11, and outputs a call signal from the call receiver 12 to the office line. configured to send to. The bell receiving circuit 14 is connected to the office line terminal, receives a bell signal coming from the office line, and sends the signal to the CPU 13.

The handset 2 is formed into a small cylindrical shape so that it can be easily held, a microphone 27 is provided at the tip, an earphone speaker 28 is connected to the end, and a cord type antenna 26 is connected to the end. Further, a hook switch 40 for on-hook and off-hook and a ring tone speaker 29 for generating a ring tone are provided on the outer periphery of the handset main body.

As shown in FIG. 3, the circuit configuration of the handset 2 includes a call transmission section 21, a call reception section 22, and a data signal input section 23.
, a data signal output section 24, and a CPU 13 that performs control processing of each circuit. Call transmission section 21
consists of a bandpass filter, an oscillator, an FM modulator, etc., and the transmission output side is connected to the antenna 26, and the microphone 27
FM-modulated specific frequency signals are outputted to the antenna 26 according to the human-powered telephone call sound through the amplifier 41 and the data signal from the data signal output section 24, and transmitted to the base set 1 side.

The call receiving unit 22 includes a bandpass filter, an RF amplifier,
It consists of a mixer, local oscillator, intermediate frequency circuit, demodulation circuit, filter, etc., and is connected to the base set 1 via the antenna 26.
It receives and demodulates the transmission signal (call sound and data signal) from the earphone speaker 28 through the amplifier 42.
The data signal is connected to be sent to the CPU 25 through the data signal input section 23.

The CPU 25 is a one-chip CPU that incorporates a ROM, etc. on the same chip.Based on program data written in the ROM in advance, the CPU 25 sends hook-on and hook-off signals to the data signal output section 24, and receives an incoming signal from the data signal input section 23. When manually operated, control processing such as making the ringtone speaker 29 sound is performed. A rechargeable battery 20 is provided as a power source within the handset l.

The dial signal generator 3 is formed, for example, in the form of an easily portable card, and a push button dial switch 31 consisting of a group of key switches 0 to 9, #, and *, and a speaker 34 are provided on the front surface. As shown in FIG. 4, the pushbutton dial switch 31 is connected to a dial signal oscillator 32, and a speaker 34 is connected to the output side of the dial signal oscillator 32 via an amplifier 33. The dial signal oscillator 32 generates a PB multiplied signal corresponding to the dial by synthesizing two different audio frequency signals, and can use a synthesizer-type one-chip LSI with an external crystal oscillation circuit.

Next, the operation of the cordless telephone with the above configuration will be explained. First, when making a call to an external party, the user operates the hook switch 40 of the handset 2 to the off-hook side. As a result, the hook-off signal is transmitted to the data signal output section 24.
The hook-off signal is sent to the call transmitter 21 from the call transmitter 21 to the base set 1 via the antenna 26.

In the base set 1, the call receiving section 1 is connected via the antenna 16.
2 receives this hook-off signal, and the CPU 13 sends a control signal to the office line circuit 15 to block the office line.

In this state, while bringing the speaker 34 of the dial signal oscillator 3 close to the microphone 27 of the handset 2, the user inputs the telephone number of the telephone light into its pushbutton dial switch 31.
Manpower. Then, a PB double signal audible sound is output from the speaker 34 and sent to the call transmitter 21 through the microphone 27. The call transmission section 21 of the handset 2 transmits the PB multiplied signal base set 1 via the antenna 26.
The PB multiplied signal is received by the call receiving section 12 of the base set 1, and sent out to the PB multiplied signal via the office line circuit 15. When the person on the other end of the line answers the phone, the call begins.

The user's voice is input manually from the microphone 27 of the handset 2 and transmitted to the base set 1 via the call transmitter 21 and the antenna 26. This voice signal is received by the call receiver 12 of the base set 1, and the voice The signal is sent from the office line circuit 15 to the office line.

On the other hand, the voice from the other party's telephone is sent from the office line circuit 15 of the base set 1 to the call transmitter 11, and then transmitted to the handset 2 via the antenna 16. In the handset 2, this audio signal is received by the antenna 26 and the call receiving section 22, and the audio signal is sent to the earphone speaker 28 via the amplifier 42, so that the user can hear the other party's voice from the earphone speaker 28. .

On the other hand, when a call is received from outside and a bell signal arrives at the office line terminal, the bell receiving circuit 14 of the base set 1 receives this and outputs the signal to the CPU 13. At this time, the CPU
13 sends a signal to the office line circuit to block the office line, and also sends an incoming call signal to the call transmitter 11. As a result, the incoming call signal is sent from the call transmitter 11 and the antenna 16 to the handset 2, and the antenna 26 of the handset 2
, is received by the call receiving section 22. Then, this incoming signal is sent from the data manual section 23 to the CPU 25.
5 makes the three-tone speaker 29 sound. The user now knows that there is an incoming call from outside and operates the hook switch 40 of the handset 2 to the off-hook side.

At this time, a hook-off signal is sent to the CPU 25, and the
25 sends this hook-off signal to the call transmitter 21 via the data output 1is24, and the hook-off signal is sent from the call transmitter 21 to the antenna 26 to the base set! sent to. In the base set 1, when this hook-off signal is received in the call receiving unit 12, the CPU 13 operates the office line circuit to block the office line, allowing the user to talk to the caller from an external telephone. It becomes a state.

Then, the user can comfortably make a call while holding the handset 2 in his hand and putting the earphone speaker 28 to his ear, and the transmission and reception of the call tone during the call f3 is performed in the same manner as described above.

On the other hand, when the call ends and the user operates the hook switch 40 of the handset 2 to the on-footer side, the hook switch 8 is transmitted to the base set 1 through the data signal output section 24 and the call transmission section 21, and CPU
13, when inputting the word ``Funkuonyi'', the station line circuit 15
Operate to open the central line.

In the above embodiment, the shape of the handset is a small cylinder, but the shape can be any shape as long as it is small and easy to hold, or can be easily held by a part of the user.

<Effects of the Invention> As explained above, according to the cordless telephone of the present invention, the handset includes a microphone connected to the call transmitter for manually transmitting audio to be sent to the other party, and a microphone connected to the call receiver to transmit audio from the other party. an earphone speaker for outputting a sound, and a dial signal generator including a push button dial switch, a dial signal oscillator, and a speaker for generating the push button dial signal sound is provided separately from the handset. Because of this structure, the shape of the handset can be made into a small and arbitrary shape where only the microphone is installed externally without being occupied by a push-button dial switch or speaker. It can be downsized to Therefore, the user can comfortably hold the handset while making a call.

Additionally, the circuitry within the handset can be simplified, reducing power consumption and extending the life of the battery within the handset.

[Brief explanation of the drawing]

The figures show embodiments of the present invention: Fig. 1 is an overall perspective view of a cordless telephone, Fig. 2 is a block diagram of a base set, Fig. 3 is a block diagram of a handset, and Fig. 4 is a block diagram of a dial signal generator. It is a diagram. DESCRIPTION OF SYMBOLS 1...Base set, 2...Hand point 3...Dial signal generator, 21...Call transmission part, 22...Call volume part 8, 27...Microphone, 28...Earphone speaker. Patent applicant Takachiho Communication Equipment Manufacturing Co., Ltd.

Claims (1)

[Scope of Claims] It has a central office line circuit connected to the central office line, a call transmitter, and a call receiver, and makes and responds to the central office line while transmitting and receiving calls wirelessly to the handset. A cordless telephone comprising a base set, a handset having a speaker, a microphone, a call receiving section, and a call transmitting section for making calls, and wirelessly transmitting and receiving calls between the base set and the base set via an antenna. The handset is equipped with a microphone connected to a call transmitter for inputting audio to be sent to the other party, and an earphone speaker connected to the call receiver for outputting audio from the other party, a pushbutton dial switch, and a dial signal. A cordless telephone set, characterized in that a dialing signal generator comprising an oscillator and a speaker for generating a push button dialing signal tone is provided separately from the handset.