JP3367960B2 - Telephone - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone, and more particularly to a telephone having a storage device for storing dial numbers.

[0002]

2. Description of the Related Art Conventionally, for example, a telephone having a speed dial function is provided with a dial memory device (storage device) which is usually composed of a storage device such as a RAM, and the speed dial number is stored in the dial memory device. ing. In this case, the backup of the storage of the speed dial number in the dial memory device is performed by the backup battery. This backup battery is mounted on a telephone and is generally a consumable item. When the backup battery is replaced, the content of the dial number is generally compensated by the electric charge stored in the super capacitor.

[0003]

However, when the above backup battery is replaced, it takes some time for replacement, but the charge accumulated in the supercapacitor backs up the storage device as described above. It discharges in the meantime. Therefore, the battery must be replaced within a predetermined time. That is, the backup battery is
There was a limit on the replacement time.

An object of the present invention is to prevent the replacement time for replacing a backup battery of a telephone from being restricted.

[0005]

According to a first aspect of the present invention, there is provided a storage device for storing dial numbers, the storage device is backed up by a backup battery when on-hook, and the storage device is supplied with power from a telephone line when off-hook. in telephone set to be, when detached the backup battery is composed from the telephone line so as to supply power to the storage device, the backup
Replace with a battery voltage detector that detects the terminal voltage of the battery
Detects the ringing signal input from the ringing signal sending means such as a machine
Ringing signal detection device and the battery voltage detection device
When the terminal voltage of the backup battery is below the specified value
Input the generated detection signal and the calling signal detection device calls
Input the ringing signal detection signal that is output when a signal is received.
The second call by changing the interruption time of the ringing signal.
A second ringing signal generator for generating an outgoing signal is provided .

According to the second aspect of the invention, the second calling signal is issued.
Instead of the raw device, the battery voltage detector is
Detection that occurs when the terminal voltage of the battery is below the specified value.
Input the outgoing signal, and the calling signal detection device receives the calling signal.
When the ringing signal detection signal that is output when the
A third ringing signal whose frequency is different from that of the ringing signal
A third ringing signal generator is provided.

According to the third aspect of the invention, the second calling signal is issued.
Instead of the live device, the battery voltage detection device inputs a detection signal generated when the terminal voltage of the backup battery is below a specified value, and the ringing signal output when the ringing signal detection device receives the ringing signal. If you enter a detection signal, it is provided a fourth call signal generating equipment for generating a fourth call signal modulated at a frequency different from the call signal.

According to a fourth aspect of the present invention, a calling signal detecting device is provided.
Instead of inputting, input from calling signal sending means such as an exchange.
A calling signal detection device for detecting a calling signal is provided , and instead of the second calling signal generation device, the battery voltage detection device inputs a detection signal generated when the terminal voltage of the backup battery is equal to or lower than a specified value. and, the calling signal detection device if you enter a calling signal detection signal to be output when receiving a call <br/> signal, generates a second calling signal intermittently the calling signal A second calling signal generator is provided.

[0009]

In the telephone according to the first aspect, when the backup battery is removed from the telephone for replacement, the storage device is supplied with power from the telephone line to compensate the stored content of the backup battery. The terminal voltage of the backup battery is the battery voltage
It is detected by the detection device. Calling signal from an exchange
Is input, this ringing signal is detected by the ringing signal detector.
To be detected. On the other hand, the terminal voltage of the backup battery is specified
If the value is less than the specified value, the detection signal (signal below specified voltage value)
It is sent to the second call signal generator. Second call signal generator
Is a second call that has an interruption time different from the normal call signal.
Generates a signal to the user to backup battery terminal voltage
Informs that is below the specified value.

In the telephone set forth in claim 2, the second call signal
The third call signal generator instead of the generator is
Generate a third ringing signal different from the normal ringing signal,
If the terminal voltage of the backup battery is below the specified value,
Inform that there is.

In the telephone set forth in claim 3, the second call signal
The fourth call signal generator instead of the generator generates a fourth call signal modulated at a frequency different from the normal call signal, and informs the user that the terminal voltage of the backup battery is less than or equal to a specified value. Inform.

In the telephone set forth in claim 4, from a switchboard or the like.
When a calling signal is input, this calling signal is
Detected. On the other hand, the terminal voltage of the backup battery
If the pressure is below the specified value, the detection signal (below the specified voltage value
Signal) is sent to the second calling signal generator. Second call
The signal generator interrupts the calling signal to make it different from the normal case.
The second call signal is generated to notify the user that the terminal voltage of the backup battery is below the specified value.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a telephone according to the present invention will be described below with reference to FIG.
It will be described in detail with reference to FIG.

As shown in FIG. 1, a telephone according to the present invention has a bridge rectifier 1, which bridge rectifier 1 comprises:
Telephone lines T1 and T2 are connected to the input side, one end of the call control circuit 7 is connected to one end of the output side via the movable contact 2a and the fixed contact 2b of the hook switch 2, and the other end is the call control circuit 7 The other end of is connected. Fixed contact 2b
One end of a switching circuit 5 for switching a power supply destination of a dial memory unit 6 which is a storage device for storing a dial number to a telephone line side or a backup battery 3 for a dial memory is connected to the. Dial memory section 6
An automatic dialing unit 8 for automatically sending a dial number to a telephone line is connected to a connection point between the call control circuit 7 and the call control circuit 7.

The other end of the switching circuit 5 is connected to the positive electrode of the backup battery 3 and also the backup battery 3
It is connected to a voltage detection unit 9 which is a battery voltage detection device for detecting the terminal voltage of. The negative electrode of the backup battery 3 is connected to a fixed contact 4a of a mechanical switch 4 which is a detection device for detecting the loading state of the backup battery 3. The movable contact 4b of the switch 4 is connected to the connection point between the bridge rectifier 1 and the call control circuit 7.

At the connection point between the telephone line T2 and the bridge rectifier 1, the input side of the ringer unit 10 which is a calling signal detecting device for detecting a calling signal and a calling signal detecting device for detecting a calling signal is connected. The output side of the ringer unit 10 is connected to the ringing signal generation switching unit 12 that is the second to fourth ringing signal generating devices and the calling signal generation switching unit 13 that is the second calling signal generation device. At the other connection point between the call signal generation switching unit 12 and the call signal generation switching unit 13,
The other end of the voltage detector 9 is connected. A speaker 11 is connected to the call signal generation switching unit 12.
The call control circuit 7 is provided on the output side of the calling signal generation switching unit 13.
It is connected to the.

Next, the operation of the telephone thus constructed will be described. The terminal voltage of the backup battery 3 that supplies power to the voltage detection dial memory unit 6 of the backup battery and compensates the stored contents is detected by the voltage detection unit 9. When the terminal voltage becomes equal to or lower than a preset specified voltage value and the voltage detection unit 9 detects that, a detection signal (a signal equal to or less than the specified voltage value) is output. This detection signal is input to both the calling signal generation switching unit 12 and the calling signal generation switching unit 13.

Calling signal for voltage drop in the case of incoming call It is assumed that the detection signal is in the input state to the calling signal generation switching section 12. When an incoming call arrives in this state, the ringer unit 10 inputs a calling signal (usually frequency: 16H) from a calling signal sending means such as an exchange (not shown).
z, a sending time of 1 second, and a disconnection time of 2 seconds), and sends a calling signal detection signal to the calling signal generation switching unit 12.

As described above, the call signal generation switching unit 12 recognizes that the terminal voltage of the backup battery 3 is equal to or less than the specified voltage value by inputting the detection signal, as shown in FIG. When the ringing signal detection signal is input to the second ringing signal, a second ringing signal is generated corresponding to the ringing signal detection signal with the interruption time of the ringing signal changed. Or, the frequency of the calling signal was changed (16 Hz or less)
By generating a third call signal and a fourth call signal whose modulation frequency is different from the modulation frequency of the call signal and outputting (alarming) these from the speaker 11, the backup battery 3 can be replaced by the user at the time of replacement. Notify you that It should be noted that the user may carry out a normal telephone call by holding a receiver (not shown).

Replacement of Backup Battery When the user replaces the backup battery 3 after the end of the call, the user removes the backup battery 3 from the telephone, but at this time, the switch 4 linked with the hook switch 2 is turned off. Hook switch 2 at the same time
Turns on, and is in the same state as the off-hook state. Then, the power supply destination of the power source for backing up the dial memory unit 6 by the switching circuit 5 is disconnected from the backup battery 3 side and becomes the telephone line side. By this switching of the switching circuit 5, memory backup is continued in the dial memory unit 6 without interruption, and the stored contents of the dial memory unit 6 are not erased and complete compensation is made.

Call signal of voltage drop in the case of transmission When the user transmits, the receiver (not shown) is removed and the user puts the receiver on his / her ear. In this case, it is assumed that the terminal voltage of the backup battery 3 becomes equal to or lower than the specified value and the detection signal is input to the calling signal generation switching unit 13. On the other hand, when a call signal (usually, a continuous tone signal having a frequency of 400 Hz) is input to the ringer unit 10 from a call signal transmitting means such as an exchange (not shown), a call signal detection signal is transmitted. Then, the calling signal generation switching unit 13 generates a second calling signal obtained by connecting and disconnecting the calling signal and outputs the second calling signal to the handset. The user can recognize from the intermittent second call signal that the terminal voltage of the backup battery 3 has dropped below the specified value. And
The backup battery 3 can be replaced by the same method as that described above.

[0022]

As described above, according to the present invention,
Since the power for memory backup is supplied from the telephone line when replacing the backup battery, the super capacitor as in the past is not required, and when replacing it, the backup battery is removed and power is supplied from the telephone line at the same time. Accidental erasure can be prevented. In addition, when the ringing signal arrives, the ringing signal with the intermittent interval changed,
Alternatively, since the user is informed of the drop in the terminal voltage of the backup battery by the call signal with the changed frequency and the modulated call signal, the stored contents of the dial memory can be protected. Also, when the user puts his / her ear on the handset, the user is notified of the drop in the terminal voltage of the backup battery by interrupting the calling signal (beep tone).
It becomes possible to protect the stored contents of the dial memory.

[Brief description of drawings]

FIG. 1 is a block diagram showing an internal configuration of a telephone according to the present invention.

FIG. 2 is a diagram showing an example of a case where the telephone of FIG. 1 is changed to notify a user as a ringing sound of a decrease in the terminal voltage of the backup battery by changing the ringing signal.

[Explanation of symbols]

2 Hook switch 3 Backup battery 4 Switch interlocked with hook switch 5 Switching circuit 6 Dial memory unit 7 Call control circuit 8 Automatic dialing unit 9 Voltage detection unit 10 Ringer unit 11 Speaker 12 Ringing signal generation switching unit (second to fourth) Calling signal generator) 13 Calling signal generation switching unit (second calling signal generator)

Claims (4)

(57) [Claims] 1. A storage device for storing dial numbers is provided.
However, when on-hook, the above-mentioned memory is stored by the backup battery.
The equipment is backed up, and the telephone line is
In a telephone that allows power to be supplied to the storage device
hand, If you remove the backup battery,
So that power is supplied to the storage device from the lineThen In addition, the battery voltage that detects the terminal voltage of the backup battery
With pressure detector ,Check the ringing signal input from the ringing signal sending means such as an exchange.
An outgoing call signal detection device, The battery voltage detecting device is a terminal battery for the backup battery.
Input the detection signal generated when the pressure is below the specified value
Output when the ringing signal detector receives a ringing signal.
When a ringing signal detection signal is input, the ringing signal
A second ringing signal is generated by changing the signal on / off time.
Provided with a ringing signal generator A telephone that is characterized by 2.Has a storage device to store dial numbers
However, when on-hook, the above-mentioned memory is stored by the backup battery.
The equipment is backed up, and the telephone line is
In a telephone that allows power to be supplied to the storage device
hand, If you remove the backup battery,
Power from the line to the storage device, In addition, the battery voltage that detects the terminal voltage of the backup battery
A pressure detection device, Check the ringing signal input from the ringing signal sending means such as an exchange.
An outgoing call signal detection device, The battery voltage detecting device is a terminal battery for the backup battery.
Input the detection signal generated when the pressure is below the specified value
Output when the ringing signal detector receives a ringing signal.
When a ringing signal detection signal is input, the ringing signal
A third call for generating a third call signal having a frequency different from that of the signal
With a signal generator A telephone that is characterized by 3.Has a storage device to store dial numbers
However, when on-hook, the above-mentioned memory is stored by the backup battery.
The equipment is backed up, and the telephone line is
In a telephone that allows power to be supplied to the storage device
hand, If you remove the backup battery,
Power from the line to the storage device, And Battery power that detects the terminal voltage of the backup battery
A pressure detection device, Check the ringing signal input from the ringing signal sending means such as an exchange.
An outgoing call signal detection device, The battery voltage detecting device is a terminal battery for the backup battery.
Input the detection signal generated when the pressure is below the specified value
Output when the ringing signal detector receives a ringing signal.
When a ringing signal detection signal is input, the ringing signal
issueFourth modulated at a different frequency fromGenerate a ringing signal
RuFourthA call signal generator
Talk machine. 4.Has a storage device to store dial numbers
However, when on-hook, the above-mentioned memory is stored by the backup battery.
The equipment is backed up, and the telephone line is
In a telephone that allows power to be supplied to the storage device
hand, If you remove the backup battery,
Power from the line to the storage device, And Battery power that detects the terminal voltage of the backup battery
A pressure detection device, Exchanges, etc.CallingInput from signal transmission meansCallingInspect the signal
Put outCallingA signal detection device, The battery voltage detecting device is a terminal battery for the backup battery.
Input the detection signal generated when the pressure is below the specified value
The aboveCallingSignal detectorCallingOutput when a signal is received
ForceCallingWhen a signal detection signal is input,CallingBelief
issueSecond call that was interruptedGenerate a signalSecond callSignal
With raw equipmentPrepareA telephone that is characterized by