KR830001780Y1 - Telephone Unattended Answering Device - Google Patents

Abstract

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Description

Telephone Unattended Answering Device

The accompanying drawings are electrical circuit diagrams for describing the present invention.

The present invention relates to a telephone unattended answering device.

In a conventional automatic telephone, when a subscriber wants to call another subscriber to which the subscriber subscribes, the call subscriber can make a call and simultaneously make a call with the other subscriber.

However, when the called party is away, the call signal will continue to ring on the called party's phone. Accordingly, there is an example in which the telephone exchange office consumes power and the caller loses time economically by unnecessarily waiting for the called party to come out.

In order to prevent this, there is known a signal device that automatically notifies when there is no callee. That is, according to Practical Announcement 79-1404, in an unmanned telephone receiver capable of answering a call when there is no callee, indicating that the recipient is absent, and recording the caller's call, a low sliding part and a high sliding part on the shaft which is slowed down to the motor The first cam having the sliding part, the second cam having the cutting part, and the rotating plate having the insulating rod are fixed, and the hill of the first cam and the cutting rod of the second cam and the insulating rod of the rotating plate are positioned in a straight line. The sliding part is connected to the operation between the playback device and the recorder, and the sliding part of the second cam has a mechanical structure connected to the operation of raising and lowering the handset of the telephone. There was a fear of failure.

In addition, it is known that the electronic circuit, apart from the mechanical configuration as described above, is complicated to increase the production cost, and once a failure occurs, the entire circuit is inconvenient.

The present invention compensates for the above-mentioned shortcomings, but when the receiver is absent, the electronic melody is automatically notified to the other party after a certain period of time, and the request of the person who wants to transmit for a certain period of time after the answer is completed is recorded. By returning and playing back the subscriber, it is possible to confirm from whom the call was received, and to record the contents of the conversation with the other party, if necessary, which will be described in detail by the circuit diagram according to the embodiment of the present invention. .

Terminals (1) and (2) can be connected to a direct current power supply, for example batteries or accumulators, and terminals (3) and (4) can be used for direct and alternating current by connecting common AC power.

Therefore, the terminals 3 and 4 are connected to the primary winding of the power transformer PT, and diodes D ₁ and D ₂ are rectified in parallel at both ends of the secondary winding of the power transformer PT to condense the capacitor C. _It is as known to supply power to the device of the present application which is smoothed by ₁ ).

On the other hand, telephone lines are connected to terminals 5 and 6, and subscriber telephones are connected to terminals 7 and 8.

Between the terminals (5) and (6) is rectified to the diode (D ₃ ) (D ₄ ) through a resistor (R ₁ ), a variable resistor (VR ₁ ) and a capacitor (C ₂ ) (C ₃ ) to the capacitor (C). ₄ ) is charged, and an anode and a cathode of a programmable unijunction transistor (hereinafter, abbreviated as PUT) are connected between both terminals of the capacitor (C ₄ ), and the gate is a reedlelay (Ry _1). ) And resistor (R ₂ ) are connected to the power supply.

Meanwhile, the light emitting diode LED ₁ and the capacitor C ₅ are connected in parallel to the reedlelay Ry ₁ and the lead switch LS ₁ is grounded. In addition, the collector of the emitter grounded transistor Q ₁ is connected to the power supply unit of the reedlelay Ry ₁ , and the base is connected to the fixed contact a ₂ of the trip circuit switch described later through the resistor R ₃ .

In addition, the lead switch LS ₂ interlocked with the lead switch LS ₁ is connected to the power supply unit and the base of the transistor Q ₂ through a resistor R _{4 in} series with the reed drill lay Ly ₂ . And the power supply to the oscillator circuit, the trip circuit, the electronic sounder 3, and the recording / reproducing device 10.

The anode of the PUT _{2 with} the cathode grounded is connected to the power supply through the resistors R ₅ and R ₆ and the variable resistor VR ₂ , and the capacitor C ₆ is connected between the anode and the cathode. resistance (R ₇₎ is connected to a light emitting diode (LED ₂₎ diode connected to and the light emitting (LED ₂₎ of the other end of the resistor (R ₈₎ and a capacitor (C ₇₎ is connected in parallel with the emitter grounded transistor (Q ₄₎ At the same time as applying to the base of the emitter is also grounded in the selector of the transistor (Q ₃ ) and the selector of the transistor (Q ₄ ) to trigger the base of the transistor (Q ₃ ) through the resistor (R ₉ ) a light emitting diode (LED ₃₎ and a resistor (R ₁₀₎ to be connected to and in series with a power supply in a light emitting diode (LED _3), the lifting resistance (R _12, R ₁₃₎ connected in the PUT ₃ gate is cyano the above-PUT ₃ and to a power source variable resistor (VR ₃₎ and the cathode-o capacitor between the node (C ₉₎ is It is determined which constitutes the oscillator circuit is adapted to trigger the base of a resistance (R ₁₁₎ a transistor (Q ₅₎ from the larger collector of the output signal of the transistor (Q ₄₎ of the oscillating circuit. On the other hand, the clamp of the transistor Q ₆ having the emitter of the transistor Q ₅ connected to the base is connected to the power source through a relay Ry ₃ connected in parallel with the diode D ₅ and to the relay Ry ₃ . The movable contact (a ₁ ) switched by is grounded in parallel with the capacitor (C ₁₀ ) and the resistor (R ₁₄ ), and the other movable contact (b ₁ ) is grounded through the capacitor (C ₁₁ ) and the fixed contact (b) ₂ ) is grounded through the resistor R ₁₆ , and the fixed contact b ₃ is connected to the base of the transistor R ₇ through the resistor R ₁₅ to form a trip circuit.

On the other hand, the relay Ry ₄ is connected to the clamper of the transistor Q ₇ through the diode D ₆ and is fixed by the movable contacts e ₁ (f ₁ ) e ₂ , e ₃ , f ₂ , f By turning ₃ ) ON or OFF, power is supplied to the well-known recording and playback player 10 and the electronic acoustic device 9.

Unexplained symbols R ₁₇ , R ₁₈ , R ₁₉ , R ₂₀ , R ₂₁ , R ₂₂ , R ₂₃ are resistors, C ₁₂ , C ₁₃ , C ₁₄ , C ₁₅ , C ₁₆ are capacitors, 11 is well-known Sw ₁ is a switching switch interlocked with the movable contacts a ₁ and b ₁ , Sw ₂ is an auxiliary switch, and Sw ₃ is a recorder 11 power switch.

The operation and effects of the present invention having the above configuration will be described in detail.

In other words, when a battery or storage battery is to be used as a power source, a battery or storage battery (not shown) is connected between the terminal 1 and the terminal 2, and when a commercial AC is to be used as a power source, the terminal ( By connecting a commercial AC power supply between 3) and the terminal 4, the voltage rectified by the diodes D ₁ and D ₂ connected to the ends of the secondary winding of the power transformer PT and rectified by the capacitor C ₁ Smoothing is supplied to the power of each circuit as is known.

Therefore, when a telephone signal line is connected between the terminal 5 and the terminal 6 and a subscriber telephone (not shown) is connected between the terminal 7 and the terminal 8 according to the circuit diagram according to the circuit diagram Is connected to the telephone via the terminal (7) and the terminal (8), and the capacitor (C ₄ ) is charged through the variable resistor (VR ₁ ), the capacitor (C ₂ , C ₃ ) and the diode (D ₄ ). Therefore, 60 ~ 80 volts AC signal along the trunk line rings the phone and the condenser (C ₄ ) starts charging.

Such an AC signal is rectified by the diode D ₄ through the capacitors C ₂ and C ₃ and charged in the capacitor C ₄ , but the normal DC signal is cut off by the capacitors C ₂ and C ₃ . Passed only when an AC signal arrives.

In this way, when the charge voltage of the capacitor (C ₄ ) is oversaturated and discharge starts, the diode (D ₄ ), which was used as a rectifier, is not conducting in the reverse direction. Therefore, through the anode-cathode due to the characteristics of PUT ₁ . When the anode voltage increases due to discharge and exceeds the open standoff, the anode current flowing in the reverse direction reverses its polarity and breaks over, and the current flows to the gate. Therefore, the lead switch connected to the power supply leads to a lead relay Ry ₁ . Turn on (LS ₁ , LS ₂ ). When Thus relay (Ry ₂₎ also ryeoja triggers the base of the transistor (Q ₂₎ transistors the emitter of the (Q ₂₎ - are the collector-conductive diodes (D _1, D _2), which follows the power rectifier as described above Each part of the circuit starts to supply power. That is, the supplied power starts charging the capacitor C ₃ through the variable resistor VR ₂ and the resistor R ₆ , and the capacitor C ₉ through the variable resistor VR ₃ and the resistor R ₁₂ . Although charging starts, the charging time of the capacitor C ₈ and the capacitor C ₉ can be adjusted by varying the variable resistor VR ₂ and the variable resistor VR ₃ .

Therefore, when the capacitors C ₈ and C ₉ are supersaturated and discharge starts, the current flows to the gate when the PUT ₂ breaks over due to the characteristics of the PUT as described above, and thus the capacitor C ₇ through the light emitting diode LED ₂ . ) and the resistor (R ₈₎ when and to trigger the base of the transistor (Q ₄₎ by a time constant again PUT ₃ and the brake-over light-emitting diode (LED ₃₎ and the resistor (transistor (Q ₃₎ via the R ₉₎ of the Oscillation is started by triggering the base.

Therefore, the output of the oscillation signal is conducted through a switching circuit composed of transistors Q ₅ and Q ₆ through a resistor R ₁₁ , so that a relay Ry ₃ is intended, and accordingly, a movable contact a ₁ of the relay Ry ₃ . ) Contacts the fixed contact (a ₃ ) from the fixed contact (a ₂ ) so that the transistor (Q ₁ ), whose base is triggered by the resistor (R ₁₄ ) and the condenser (C ₁₀ ), is in an open state. ₁ ) The movable contact (b ₁ ) which interlocks with the movable contact (a ₁ ) and raises the letters of the contacts is fixed from the fixed contact (b ₂ ) to the fixed contact (b ₃ ), so that the resistance of the fixed contact (b ₃ ) R ₁₅ ) triggers the base of transistor Q ₇ connected to trigger a relay Ry ₄ to enter the trip state. As a result, the movable contact e ₁ contacts the fixed contact e ₂ from the fixed contact e ₃ to supply power to the electroacoustic sound 9, and the movable contact e ₁ is also provided to the recording player 10. A movable contact f ₁ interlocked with the power supply unit is connected to the power supply unit to supply power to the recording player 10.

Therefore, the output of the known electronic sounder 9 or the recording player 10 is transmitted to the telephone of the called party through the trunk line terminals 5 and 6, and the recorded sound is transmitted to the electronic sounder 9 and the recording player 10. You will be notified of the recording. Of course, at this time, when the relay Ry ₃ is intended, the contact point of the switch SW ₁ interlocked with the movable contact point a ₁ b ₁ is connected to the output of the electronic sounder 9 and the recording player 10. In addition, since the contact point of the switch SW ₁ is connected to the trunk line terminals 5 and 6 and the subscriber telephone terminals 7 and 8, the description thereof will be omitted.

Therefore, if the reason or contact number of the telephone subscriber is recorded in advance in the recording player 10, the contents are transmitted to the caller, and at this time, the load of the present device between the telephone lines is only about 20 μamps. Only a few hundredths of the current draws, thus avoiding excessive power consumption for the telephone company.

That is, the conventional subscriber will continue to send a call signal in the absence, but according to the device of the present invention is only consumed power to rectify the AC signal to charge the capacitor (C ₄ ), the caller to confirm the recording content by connecting the recording signal Because it is economical.

In addition, if the callee has contents to be delivered by the caller, when the caller speaks the contents after the playback on the recording player 10 is completed, the recorded call is recorded on the recorder 11, and such recording is performed by the subscriber holding the handset and communicating with the other party. If recording is required during a call, the switch SW ₃ is turned on to supply power to the recorder 11.

As described above, the current charged in the capacitor C ₄ continues until discharge, and the operation time is arbitrarily determined by changing the capacity of the capacitor C ₄ or changing the resistance value of the variable resistor VR ₁ . do.

And a capacitor (C ₄₎ is considered not self lead switch (LS _1, LS ₂₎ of the lead relay (Ry ₁₎ has finished the discharge is OFF whereby the transistor (Q ₂₎ was a switch to supply power to each circuit Since the oscillation circuit of the transistors Q ₃ and Q ₄ is turned off, the oscillation is also stopped, and thus the relay Ry ₃ of the trip circuit does not operate, and thus the movable contacts a ₁ and b ₁ and the switch SW ₁ . Is returned to the state as shown in the drawing, and waits for the next signal. As described above, the call signal is input and the capacitor C ₄ is charged to repeat the operation.

In addition, each light emitting diode (LED ₁ , LED ₂ , LED ₃ ) can determine whether the operation of each circuit.

The present device as described above is easy to handle because it can be stored in the base of the phone, it is a device that can be used practically with a reliable operation.

Claims (5)

When the call signal reaches the subscriber's phone, the transistor is connected to the lead switches LS ₁ and LS _{2 of the} lead relays Ry ₁ and Ry ₂ so that power is supplied to the electronic sound 9, the record player 10, and the recorder 11. (Q ₂ ) to conduct and output of the oscillating circuit to the transistors (Q ₂ , Q ₄ ) to switch the relay Ry ₃ of the trip circuit to switch the power to the movable contacts a ₁ , b ₁ . Phone unattended answering device, characterized in that. The lead relay Ry _{1 of} claim ₁ has a polarity by breaking over the programmable unit junction transistor PUT ₁ with the charge charged in the capacitor C ₄ to the call signal reaching the trunk line 5, 6. Unattended answering device, characterized in that connected between the gate and the power supply is changed. The relay Ry _{3 of} claim ₁ is connected to the base of the transistor Q ₁ with a fixed contact a ₂ emitter grounded and the movable contact a ₁ is a capacitor C ₁₀ and a resistor R ₁₄ . Telephone unattended answering device, characterized in that the grounded by the parallel connection. The capacitors C ₈ and C ₉ are connected between the anode and the cathodes of the programmable union junction transistors PUT ₂ and PUT ₃ to an oscillation circuit comprising the transistors Q ₃ and Q ₄ of the claims. A telephone unattended answering device, characterized in that it is adjusted to a resistor (VR ₂ , VR ₃ ). And the base signal of the transistor (Q ₁ ) is interrupted through a fixed contact (a ₂ ) at the same time as tripping in the trip circuit of claim ₁ .