JPS5821249Y2 - Wireless telephone device using magnetic telephone - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wireless telephone device using a magnetic telephone.

Conventionally, when connecting a magnetic telephone to a radio, it was not possible to pass current through the telephone line of the magnetic telephone, so a hook switch inserted into the loop of the telephone line was used to connect the 0N-HOOK.
It was impossible to obtain information on 0FF-HOOK.

Therefore, the transmitter had to be operated all the time.

Leaving the transmitter in constant operation in this manner is extremely disadvantageous in terms of current consumption when a battery is used as the power source.

An object of the present invention is to provide a wireless telephone device with low power consumption.

The present invention is characterized in that the handset of the magnetic telephone is lifted up, and the transmitter is operated only when a microphone current flows or when a ringing oscillator operates, thereby reducing the average current consumption.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the circuit of a generally known magnetic telephone, with telephone lines 1 and 2 connected to another magnetic telephone or to a magnetic switchboard.

3.4 is a microphone current supply line for the magnetic telephone and is connected to the battery.

5 is a ringing oscillator, 6 is a bell, 7 is a receiver, 8 is a microphone, and 9 is a hybrid circuit.

Only when off-hook is the hook switch 10 closed and microphone current supplied.

Figure 2 is a connection diagram of two magnetic telephones 11.
As explained in the figures, hook information cannot be transmitted to the other magnetic telephone or magnetic switch through the telephone line 12.

Note that 13 is a microphone current supply line, and 14 is a battery.

FIG. 3 is a connection diagram between a conventional magnetic telephone 11 and a wireless device 15. As shown in FIG.

In the figure, 11 is a magnetic telephone, 15 is a radio, 12 is a communication line, 13 is a microphone current supply line, and 14 is a battery.

As explained in FIGS. 1 and 2, since hook information cannot be obtained from the communication line 3, the transmitter of the radio 15 must be operated at all times.

FIG. 4 is a connection diagram between the magnetic telephone 11 and the radio 15 according to the present invention.

The difference from FIG. 3 is that 13 microphone current supply lines are supplied from the radio 15'.

FIG. 5 shows the magnetic telephone 11 of the radio 15 shown in FIG.
This is a circuit that interfaces with the

In the figure, 16 is a terminal connected to communication lines 1 and 2 of the magnetic telephone shown in FIG. 1, and 17 is a hybrid circuit.

18 is a rectifier circuit for a ringing signal sent out from a ringing oscillator of the magnetic telephone; 19 is a ringing oscillator that rings the bell of the magnetic telephone; and 20 is a switching circuit.

21 is a photocoupler which is operated by the output of the rectifier circuit 18 and detects the presence or absence of a ringing signal, and its collector becomes O'' when a ringing signal is detected.

22 is a power supply for supplying microphone current to the magnetic telephone;
Microphone current is supplied through a supply line 23 to 3.4 of the magnetic telephone set in FIG.

When the handset of the magnetic telephone is lifted up, the hook switch 10 shown in FIG. 1 closes, current flows, and the collector of the photocoupler 24 for detecting hook information becomes rOJ.

25 is a NAND gate which receives the collector output of the photocoupler 21 and the collector output of the photocoupler 24 as inputs, and operates the transmitter when the output of the NAND gate becomes "1".

Therefore, when a ringing signal is detected or 0FF-HOO
The transmitter operates at K time.

26 is called the 5IG-8 line, and when a ringing signal is detected,
1”.

Figures 6a-d respectively show the hook switch, ringing signal detection, transmitter and 5IG-8 of a conventional magnetic telephone.
FIG. 3 is a timing chart diagram showing that the transmitter is always operating.

Figures 7a-d show timing diagrams similar to Figure 6 according to the present invention, but with the transmitter operating when the handset is lifted and upon detection of a ringing signal as questioned in Figure 5.

As mentioned above, according to the present invention, the wireless device has a microphone current supply circuit, and the microphone current is supplied or cut off by opening and closing the hook switch inserted into the microphone current supply circuit of the magnetic telephone. The transmitter operates only during a call or when a ringing signal is detected, reducing average current consumption.

[Brief explanation of the drawing]

Figure 1 is an internal circuit diagram of a magnetic telephone, Figure 2 is a specific example of the connection between two magnetic telephones, Figure 3 is a specific example of the connection between a conventional magnetic telephone and a radio, and Figure 4 is a specific example of the connection between a conventional magnetic telephone and a wireless device. 5 is a specific example of a connection between a magnetic telephone and a wireless device according to the present invention, FIG. 5 is a specific example of an interface circuit between a wireless device and a magnetic telephone according to the present invention, and FIG. 6 is a conventional method of hook switch and ringing. An example showing the relationship between signal detection and transmitter operation. FIG. 7 is an example showing the relationship between hook switch and ringing signal detection and transmitter-like operation according to the present invention. In the figure, 1, 2... communication line terminal, 3, 4...
...Microphone current supply terminal, 5...Ringing oscillator, 6...Bell, 7...Telephone receiver, 8...Microphone, 9... ...Hybrid circuit, 10...Hook switch, 11...
...Magnetic telephone, 12...Talking line, 13.
...Microphone current supply line, 14...Battery,
5... Radio equipment, 16... Call line terminal,
17...Hybrid circuit, 18...
Ringing signal rectifier circuit, 19... Ringing oscillator, 20... Switching circuit, 21...
Photocoupler for ringing signal detection, 22...
...Power supply for microphone current supply, 23...Microphone current supply line, 24...Photocoupler for detecting hook information, 25...N for operating the transmitter
AND gate, 26...5IG-8 gate.

Claims (1)

[Scope of utility model registration request] A wireless telephone device including a magnetic telephone having at least a hook switch, a ringing oscillator, and a microphone, and a radio connected thereto, further providing current for the microphone to the magnetic telephone in response to the hook switch. a first means for detecting the microphone current; a second means for detecting the microphone current; and a third means for detecting the operation of the ringing oscillator; A wireless telephone device using a magnetic telephone characterized in that it operates.