KR100200342B1 - Automatic converting device for telephone hook - Google Patents

Abstract

The telephone hook automatic switching device detects the abnormal state of the telephone caused by the wrong position setting of the handset and the telephone itself and automatically switches to the on hook state. The telephone input terminal connected to the telephone line and the input terminal Relay, hook switch connected to contact a of terminal a of relay, speech network connected to contact a of terminal of hook switch, continuous sound transmitted from telephone exchange station due to incorrect positioning of handset and receiver It consists of a relay control means for sensing a signal and supplying current to the coil of the relay and a momentary switch inserted between the relay coil and the dish, the tone ringer on the b contact terminal of the relay and the b contact terminal of the hook switch It is comprised by the telephone hook automatic switching device characterized by the circuit connected.

Description

Telephone hook change over device

1 is a block diagram of a conventional off-hook display device.

2 is a block circuit diagram of a telephone hook automatic switching device according to the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone, and more particularly, to a telephone hook automatic switching device for switching to an automatic on-hook state without touching a telephone receiver when it is in an off-hook state due to a mistake in the telephone receiver.

In a typical telephone, the hook switch is protruded to the outside, and the operation of the hook switch is pressed when the handset is placed on the telephone, so that the receiver can receive a signal from the outside. If you raise it, you can raise hook switch at the same time so that you can talk or send signal to other party.

However, if the telephone user ends the call and puts the handset off the wrong side, the user does not press the hook switch. Therefore, since the signal from the outside can not be received, that is, cannot receive a call, a lot of inconvenience occurs in telephone communication.

The conventional technique for solving this problem is shown in FIG.

As shown in FIG. 1, an indicator 8 is attached between the bridge rectifier circuit 7 connected to the telephone line input terminal 1 and the speech network 9 to signal the indicator 8 during off-hook. Is applied to indicate the off-hook status.

However, in this case, if there is only a voltage drop across the indicator 8, the light is always on, so the voice band signal cannot be detected at the terminal so that the user cannot know whether the telephone is in a normal state or an abnormal state. In other words, since the indicator 8 is unclear whether the telephone is in the on-hook state or the off-hook state, a problem arises in switching the telephone to the normal state.

Another prior art is disclosed in Korean Patent Application No. 91-14281 filed by the present applicant, which improves the problems of the prior art, so that when a signal below a certain level continues during a telephone off-hook, a voice or optical signal There was a telephone hook monitoring alarm function to generate an alarm in the form of.

However, the above-described prior art still has the inconvenience of requiring the user to recognize the alarm of the voice or light signal and place the telephone back in the correct position.

Accordingly, it is an object of the present invention to provide an automatic telephone hook switching device capable of returning to an automatic on-hook state by the telephone itself detecting a signal of an abnormal state of the telephone.

Automatic telephone hook switching device for achieving the object of the present invention is a telephone input terminal connected to the telephone line, a relay connected to the input terminal, a hook switch connected to the a contact terminal of the relay, connected to a contact terminal of the hook switch Connected to the speech network, the relay control means for detecting a continuous tone signal transmitted from the telephone exchange station and supplying a current to the coil of the relay due to incorrect positioning of the handset and the receiver, and between the relay coil and the dish on

It is composed of an instantaneous switch inserted, and a telephone hook automatic switching device, characterized in that the tone ringer circuit is connected to the b contact terminal of the relay and the b contact terminal of the hook switch.

The automatic telephone hook switching device according to the present invention is characterized in that the relay is operated based on the detected continuous tone signal, whereby the tone ringer circuit is connected to the telephone input terminal.

The telephone hook automatic telephone apparatus according to the present invention is characterized by releasing the connection between the telephone input terminal and the tone ringer circuit by the operation of a momentary switch and connecting the telephone input terminal to the hook switch.

In the automatic telephone hook switching device according to the present invention, the relay control means includes a continuous tone signal detecting circuit for detecting a continuous tone signal transmitted from a telephone exchange station, and a signal generating circuit for generating a high level output according to the detected continuous tone signal. And a relay driving circuit for operating the relay according to the output of the signal generating circuit.

Hereinafter, more details of the present invention will be described with reference to the accompanying drawings.

2 is a block circuit diagram of a telephone hook automatic switching device of the present invention.

Telephone input terminal 20 connected to a telephone line, a relay 24 connected to the input terminal 20, a hook switch 41 connected to a contact terminal of the relay 24, a of the hook switch 41 Speech network 29 connected to the contact terminal, continuous sound signal for detecting continuous sound signal transmitted from telephone exchange station due to wrong positioning of transmitter and receiver connected to speech network 29 21), a signal generator circuit 22 for generating a high level output according to the sensed continuous sound signal, and a relay for supplying current to a coil of the relay 24 according to the output of the signal generator circuit 22. And a momentary switch 42 inserted between the relay coil and the ground, the tone ringer circuit being connected to the b contact terminal of the relay 24 and the b contact terminal of the hook switch 41. 40) is connected. The operation of the above-mentioned telephone hook automatic telephone apparatus will be described below.

When the user puts the handset wrongly on the telephone, the telephone exchange will send a specific signal, that is, a continuous tone signal. When this particular signal is received, the signal detecting circuit 21 determines whether the received signal is a received signal or another signal when the receiver is erroneously placed, and sends a 'beep' sent from the exchange station when the receiver is erroneously released. It operates only on continuous signals that beep, and does not operate when other signals are received.

The signal detecting circuit 21 receiving the continuous sound signal transmits the reception of the continuous sound signal to the signal generating circuit 22.

Then, the signal generation circuit 22 generates a signal in a state in which the relay driving circuit 23 can operate.

The input of the relay driving circuit 23 has a high state and a low state. When the signal does not enter normally, the state remains low because the drive circuit 23 does not operate and the drive circuit 23 receives a high signal. Is operated to operate the relay 24.

When the relay 24 operates, the switch normally in the on state, that is, the switch at the contact a goes to the contact b and is switched to the on-hook state. That is, when a signal is supplied from the telephone exchange to the telephone input terminal 20 via the telephone line 26, it is connected to the tone ringer 40 through the contact b. As a result, the signal supply of the continuous ring tone from the telephone exchange station is stopped.

Thereafter, when the normal voice signal is supplied from the telephone exchange station to the telephone together with the intermittent sound signal, the tone ringer 40 is operated by the intermittent sound signal to ring the bell. At this time, the hook switch 41 is in a state in which the handset and the handset are placed incorrectly, that is, the switch is held at the contact point a and the switch of the relay 24 is held at the contact point b. do. At this time, when the user turns off the momentary switch 42 inserted between the relay 24 and the ground, the relay 24 is also turned off, and is returned to the contact a again.

Therefore, the telephone line 26 is connected to the speech network 29 via the telephone input terminal 20, the contact a of the relay 24, and the contact a of the hook switch 41, thereby making a normal telephone call.

When the handset is placed on the telephone so that the handset is correctly on-hook after a telephone call, the switch of the hook switch 41 is located at the contact b and the switch of the relay 24 is located at the contact a so that the momentary switch 41 is turned on again. Even if the telephone exchange station is unloaded, the signal transmitted from the telephone exchange station is not supplied and the relay 24 is not operated.

As described above, the present invention prevents the inconvenience of making a phone call by using the hook monitoring device used in the telephone by switching the automatic on-hook state even when the telephone user ends the call and puts the handset on the telephone incorrectly. As a phone that can contribute to the home automation era using a telephone in the future, it can contribute to functional diversification.

According to the telephone hook automatic switching device of the present invention, when the handset of the handset is placed incorrectly, the person can be on the hook when the person is next to the phone. It can relieve anxiety and does not need the function to monitor other hook status.

Claims (4)

Telephone input terminal connected to a telephone line, a relay connected to the input terminal, a hook switch connected to a contact terminal of the relay, a speech network connected to a contact terminal of the hook switch, and a speech network connected to the speech network. It consists of a relay control means for detecting a continuous tone signal transmitted from the telephone exchange station and supplying current to the coil of the relay due to the wrong positioning of the switch and an instantaneous switch inserted between the relay coil and the dish. A telephone hook automatic switching device, characterized in that a tone ringer circuit is connected to a b contact terminal and a b contact terminal of the hook switch. 2. The telephone hook automatic switching device according to claim 1, wherein said relay is operated based on said sensed continuous tone signal, whereby said tone ringer circuit is connected to said telephone input terminal. 3. The telephone hook automatic according to claim 1 or 2, wherein the operation of the momentary switch releases the connection between the telephone input terminal and the tone ringer circuit and connects the telephone input terminal to the hook switch. Switching device. 2. The continuous tone signal detecting circuit according to claim 1, wherein said relay control means comprises: a continuous tone signal detecting circuit for detecting a continuous tone signal transmitted from a telephone exchange station; And a signal generator circuit for generating a high level output in accordance with the sensed continuous tone signal, and a relay driver circuit for operating the relay in accordance with the output of the signal generator circuit.