JPH0723462A - Cordless telephone set - Google Patents

Abstract

PURPOSE:To improve the convenience and the operability by providing a polarity detection means detecting the charging polarity of a charging battery to a mobile station so as switch over to the operating mode depending on an installed location of the mobile station. CONSTITUTION:Power is supplied to a mobile station 5 by a built-in battery and when the mobile station 5 is mounted on an installed location of a base station 2, a battery of the mobile station 5 is automatically charged by a charging section 6. Moreover, an exclusive charger 7 is provided in the mobile station 5 and the battery of the mobile station 5 is charged automatically by mounting the mobile station 5 on the charger 7. Then a polarity detection section of the mobile station 5 detects it that a potential of one terminal is higher than a potential of other terminal and outputs the detected polarity to a control section. When the mobile station 5 is mounted on the base station 2, the polarity of the terminals is opposite to that when the station 5 is set on the charger 7. Thus, even when other person makes operation to reproduce for automatic answering sound recording by the mobile station 5 charged by the charger 7, a sound recording tape recorded in the automatic answering sound recording section of the base station 2 is not reproduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone composed of a base station connected to a telephone line and a mobile station which performs radio communication with the base station.

[0002]

2. Description of the Related Art FIG. 1 is a block diagram showing a basic electrical configuration of a cordless telephone. The base station 2 connected to the telephone line 1 can perform wireless communication with the mobile station 5 via the antenna 3 and the antenna 4. Therefore, it is possible to talk between the mobile station 5 and the telephone of the partner connected to the telephone line 1.

The mobile station 5 can freely set its installation location within a range in which wireless communication with the base station 2 can be performed, and wiring between the base station 2 and the mobile station 5 is unnecessary. is there. Further, the mobile station 5 is provided with a place to be mounted on the base station 2 and can be used as a handset of the base station 2. The mobile station 5 is supplied with electric power by a built-in rechargeable battery, and when the mobile station 5 is placed on the above-mentioned mounting place of the base station 2, the battery of the mobile station 5 is automatically charged by the charging unit 6. It

Further, a dedicated charger 7 is prepared for the mobile station 5, and by installing the mobile station 5 on the charger 7, the battery of the mobile station 5 is automatically charged. Therefore, the charger 7 can also be used as a mounting table for the mobile station 5. Furthermore, a plurality of mobile stations 5 can be installed in the base station 2 and the charger 7 at the same time, and any one of the mobile stations 5 can be selected and used.

[0005]

As described above, the mobile station 5 can be installed in either the base station 2 or the charger 7, in which case the mobile station 5 has the same function at any installation location. To have. However, when the mobile station 5 is installed in the base station 2, the operation of the mobile station 5 is usually mainly a call origination operation, and does not use other functions such as an extension call. Therefore, it is inconvenient for the mobile station 5 to have the same function regardless of where the base station 2 or the charger 7 is installed. In addition, the base station 2 has, for example, an answering machine recording function. This answering machine recording function instructs the other party to speak a message when the other party makes a call to the base station 2 when the other person is absent, It is a function to record the content of the message.

The recorded contents can be reproduced and heard by the mobile station 5 installed in either the base station 2 or the charger 7. In this case, for example, when the person lends the mobile station 5 installed in the charger 7 to another person, when the other person operates the answering machine playback function, the content recorded in the base station 2 is heard by another person. is there. In particular, if the recorded content is something that the person does not want others to know, it is a serious violation of privacy.

An object of the present invention is to provide a cordless telephone which can switch the operation mode according to the location where the mobile station is installed and which is improved in convenience and operability.

[0008]

According to the present invention, a base station connected to a telephone line, a mobile station driven by a rechargeable battery and wirelessly communicating with the base station, and the mobile station are mounted. In the cordless telephone including a charger, the base station includes first charging means for charging the rechargeable battery of the mobile station with a predetermined polarity, and the charger charges the rechargeable battery of the mobile station. The mobile station includes a second charging unit that has a polarity opposite to that of the first charging unit, the mobile station includes a polarity detecting unit that detects a polarity of charging the rechargeable battery, and based on a detection result of the polarity detecting unit. , A cordless telephone characterized by switching operation modes of a base station and a mobile station.

[0009]

According to the present invention, the mobile station is provided with the polarity detecting means for detecting the polarity of charging the rechargeable battery. Therefore,
With the first charging means of the base station and the second charging means of the charger,
Since the polarities of charging are opposite to each other, the mobile station can detect whether the mobile station is mounted on the base station or the charger by its polarity detecting means, and based on the detection result, the base station and the mobile station. The operation mode of can be switched.

[0010]

1 is a block diagram showing the basic electrical construction of a cordless telephone. The base station 2 connected to the telephone line 1 can perform wireless communication with the mobile station 5 via the antenna 3 and the antenna 4. Therefore, it is possible to talk between the mobile station 5 and the telephone of the partner connected to the telephone line 1.

The mobile station 5 can freely set its installation location within a range where wireless communication can be performed with the base station 2, and wiring between the base station 2 and the mobile station 5 can be set. Is unnecessary. Further, the mobile station 5 is provided with a place to be mounted on the base station 2 and can be used as a handset of the base station 2. The mobile station 5 is supplied with electric power by a built-in battery, and when the mobile station 5 is placed on the above-mentioned placement place of the base station 2, the battery of the mobile station 5 is automatically charged by the charging unit 6.

Further, the mobile station 5 is provided with a dedicated charger 7, and by mounting the mobile station 5 on the charger 7, the battery of the mobile station 5 is automatically charged. Therefore, the charger 7 can also be used as a mounting table for the mobile station 5. Further, a plurality of mobile stations 5 can be installed in the base station 2 and the charger 7 at the same time, and any one of the mobile stations 5 can be selected and used.

FIG. 2 shows a base station 2 which is an embodiment of the present invention.
3 is a block diagram showing the electrical configuration of the mobile station 5 shown in FIG.
FIG. 4 is a block diagram showing the electrical configuration of FIG.
3 is a block diagram showing the electrical configuration of FIG. In addition, FIG.
6 is a flowchart showing the operation contents of the mobile station 5. Figure 5
The transmission operation when the mobile station 5 is charged by the charger 7 will be described below based on the flowchart of FIG. The process starts at step a1. When the mobile station 5 is charged by the charger 7, the terminal e of the mobile station 5
And the terminal c of the charger 7 are connected, and the terminal f of the mobile station 5 and the terminal d of the charger 7 are connected. A positive voltage Va is applied to the terminal c of the charger 7 via the resistor Ra, and the terminal d
Is applied with a potential of 0V. Therefore, the voltage Va is applied to the terminal e of the mobile station 5 through the resistor Ra, and the potential of 0 V is applied to the terminal f.

Therefore, in step a2, the polarity detection section 10 of the mobile station 5 detects that the potential of the terminal e is higher than the potential of the terminal f, and the detected polarity is controlled by the control section 11.
Output to. The mobile station 5 will be described later.
Is installed in the base station 2, the potential of the terminal e is set to be lower than the potential of the terminal f, that is, the polarity is opposite to that when installed in the charger 7.

Therefore, the control unit 11 of the mobile station 5 can determine that the mobile station 5 is installed in the charger 7, and the process proceeds to step a3. The voltage applied between the terminals e and f is supplied to the rechargeable battery 15 via the rectifier circuit 12.
And the battery 15 is charged.

Next, in step a3, the mobile station 5 is lifted from the charger 7. At this time, in order to perform the outgoing call operation in step a4, when the outgoing call operation is performed by the operation unit 17 in step a5, the control unit 11 detects it and a control signal for turning on the hook switch 30 of the base station 2 is transmitted. The signal is modulated by the wireless transmission unit 16 and transmitted as a wireless signal from the antenna 4. The transmitted control signal is received by the wireless reception unit 31 via the antenna 3 of the base station 2, demodulated by the demodulation circuit 32, and input to the control unit 33. The control unit 33 turns on the hook switch 30 based on the control signal input in step a6, and the telephone line 1 and the call circuit 35 are connected via terminals L1 and L2.

Next, in step a7, when the dial number is input from the operation unit 17 of the mobile station 5, the control unit 1
1 converts the dial number into corresponding dial data, and the dial data is input to the control unit 33 of the base station 2 through the same route as the above-mentioned control signal.

At step a8, the control unit 33 sends a dial signal from the communication circuit 35 based on the dial data, and at step a9, it is connected to the telephone of the other party.

Therefore, the voice signal input from the other party's telephone in step a10 is transmitted to the mobile station 5 as a radio signal via the call circuit 35 of the base station 2, the radio transmitter 36 and the antenna 3.

Next, the voice signal is input to the radio receiving section 18 input via the antenna 4 of the mobile station 5 and demodulated, and can be heard as voice from the handset 20 via the communication circuit 19.

The voice signal input from the transmitter 21 of the mobile station 5 is transmitted as a radio signal from the antenna 4 via the communication circuit 19 and the radio transmitter 16. The voice signal is received by the wireless reception unit 31 via the antenna 3 of the base station 2 and demodulated, and the communication circuit 35 and the hook switch 30 are received.
Is sent to the telephone line 1 via.

Therefore, by repeating the above-described operation, the mobile station 5 and the telephone of the other party can talk with each other, and the processing is ended in step a11.

However, the mobile station 5 has a plurality of functions such as a function of making an extension call with the base station 2 in addition to the above-mentioned calling operation. Therefore, when the mobile station 2 is lifted from the charger 7, by performing operations for realizing those functions in the operation unit 11 in step a12,
As described above, the control data for realizing those functions are input to the control unit 33 of the base station 2, and the corresponding functions are realized based on the control data in step a13. Therefore, the hook switch 30 of the base station 2 is turned off except when a calling operation is performed, and the call circuit 35 and the telephone line 1 are not connected.

Next, the transmission operation when the mobile station 5 is charged in the base station 2 will be described below. When the mobile station 5 is installed in the base station 2 and is being charged, the terminal e of the mobile station 5 and the terminal b of the charging unit 6 of the base station 2 are connected, and the terminal f of the mobile station 5 and the charging unit 6 are connected. It is connected to the terminal b. A positive voltage Vb is applied to the terminal a of the charging unit 6 through the resistor Rb, and a potential of 0 V is applied to the terminal b. Therefore, the terminal e of the mobile station 5 is supplied with a potential of 0 V, and the terminal f is supplied with the voltage Vb via the resistor Rb.

Therefore, the polarity detector 10 of the mobile station 5
Detects that the potential of the terminal f is higher than that of the terminal e in step a2, and outputs the detected polarity to the control unit 11. As a result, the control unit 11 knows that the detected polarity is opposite to the polarity when it is installed in the charger 7 as described above, and determines that the mobile station 5 is installed in the base station 2. It is possible to move to step a14.
The voltage applied between the terminals e and f is applied to the rechargeable battery 15 via the rectifier circuit 12, and the battery 15 is charged.

Next, at step a14, when the mobile station 5 is lifted from the base station 2, the operation section 17 performs an operation for making a call at step a5. In this case, since the mobile station 5 has already detected that the mobile station 5 is installed in the base station 2, it does not perform any processing other than the calling operation as described above, so that processing other than the calling operation cannot be performed. ing. Next, the processing from step a6 onward is the same as the content described above, and therefore will be omitted.

In this way, when the mobile station 5 is charged in the base station 2, the transmission operation is mainly performed.
When the mobile station 5 detects that the base station 2 is charged by the polarity detection unit 10, it is made to be convenient by not accepting any function other than the transmission operation. Therefore, the mobile station 5 can be used as a handset of the base station 2.

Next, the answering machine recording / playback function of this cordless telephone will be described below with reference to the flowchart of FIG. The process is started in step b1. In step b2, an operation for reproducing the answering machine recording is performed from the operation unit 17 of the mobile station 5, and the control signal is input to the control unit 11. Next, in step b3, the polarity detector 10 of the mobile station 5 detects the polarity of charging, and the controller 11
Judges its polarity, and when judging that the mobile station 5 is charged by the base station 2, moves to step b4.

Here, the answering machine recording means that when a call is made from the other party to the base station 2, the other party is automatically informed by voice that the other party is out of voice, and the other party is instructed to speak a message. It is a function to record the contents on a recording tape.

In step b4, when a control signal for answering machine recording / playback is input to the control unit 11, the control signal is transmitted via the radio transmission unit 16 of the mobile station 5 and the antenna 4 to the base station 2.
Is transmitted to the antenna 3. The base station 2 receives the control signal via the antenna 3 in the wireless reception unit 31, demodulates it in the demodulation circuit 32, and outputs it to the control unit 33. The control unit 33 reproduces the recording tape recorded by the answering machine recording / reproducing unit 40 based on the input control signal. The reproduced voice signal is transmitted to the mobile station 5 via the communication circuit 35, the wireless transmission unit 36, and the antenna 3. Then, the voice signal is received by the wireless reception unit 18 via the antenna 4 of the mobile station 5, and can be heard as voice from the handset 20 via the communication circuit 19.

In step b3, the polarity detection unit 10 of the mobile station 5 detects the charging polarity, and the control unit 11
If the polarity is judged and it is judged that the mobile station 5 is charged by the charger 7, the process moves to step b5.

At step b5, the control section 23 performs a process for prohibiting the reproduction of the answering machine recording, and the recording tape recorded by the answering machine is not reproduced. That is, when the mobile station 5 is charged by the charger 7, the answering machine recording is not reproduced. Next, in step b6, the process ends.

Therefore, for example, if the mobile station 5 charged in the charger 7 is lent to another person, even if the other person performs an operation for reproducing the answering machine recording, the answering machine recording of the base station 2 is performed. The recording tape recorded in the section 40 is not reproduced. As a result, the contents recorded in the answering machine recording unit 40 of the base station 2 will not be heard by others who lent the mobile station 5, and the privacy of the person who lent the mobile station 5 can be protected.

In this embodiment, the reproduction of the answering machine recording has been described, but the cordless telephone has various other functions such as message recording and response recording. In these functions as well, the operation content may be similarly switched depending on which of the base station 2 and the charger 7 the mobile station 5 is charged with. Furthermore, there may be a plurality of sets of mobile stations 5 and chargers 7.

Furthermore, when the mobile station 5 is never lent to another person, a changeover switch for selecting whether or not to judge the polarity detected by the polarity detection section 10 is provided, and the polarity detection is performed by the changeover switch. It is also possible to select whether or not to play the answering machine recording by.

[0036]

As described above, according to the present invention, the mobile station has the polarity detecting means for detecting the polarity of charging, and the first charging means of the base station and the second charging means of the charger have different polarities. Differently, the mobile station can detect whether it is mounted in the base station or the charger. As a result, the operation modes of the mobile station and the base station can be switched according to the installation location of the mobile station, and a cordless telephone with improved convenience and operability can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a basic electrical configuration of a cordless telephone.

FIG. 2 is a block diagram showing an electrical configuration of a base station 2 which is an embodiment of the present invention.

FIG. 3 is a block diagram showing an electrical configuration of a mobile station 5 which is an embodiment of the present invention.

FIG. 4 is a block diagram showing an electrical configuration of a charger 7.

FIG. 5 is a flowchart showing processing contents such as a calling operation of the mobile station 5.

FIG. 6 is a flowchart showing the processing contents of the answering machine recording / playback of the mobile station 5.

[Explanation of symbols]

 1 Telephone Line 2 Base Station 3, 4 Antenna 5 Mobile Station 6 Charging Section 7 Charger 10 Polarity Detection Section 11, 33 Control Section 12 Rectifier 15 Rechargeable Battery 16, 36 Radio Transmission Section 17, 37 Operation Section 18 Radio Reception Section 19 , 35 Communication circuit 20, 39 Receiver 21, 38 Transmitter 30 Hook switch 31 Radio receiver 32 Demodulator 40 Answering machine recording

Claims (1)

[Claims] 1. A cordless telephone including a base station connected to a telephone line, a mobile station driven by a rechargeable battery and wirelessly communicating with the base station, and a charger on which the mobile station is mounted. The base station includes first charging means for charging the rechargeable battery of the mobile station with a predetermined polarity, and the charger charges the rechargeable battery of the mobile station in an opposite manner to the first charging means. The mobile station includes a second charging unit that performs polarity, the mobile station includes a polarity detecting unit that detects a polarity of charging the rechargeable battery, and the operation of the base station and the mobile station based on a detection result of the polarity detecting unit. A cordless telephone characterized by switching modes.