CN2429977Y - Consumeless waiting status interface for telephone answerign and recording - Google Patents

Abstract

The utility model relates to a stand-by answering and recording interface without watt consumption for a telephone. An electronic circuit is arranged in a casing. The utility model is characterized in that the utility model is composed of an alternating-current switch circuit, a timing circuit, a ringing triggering circuit, a shutdown circuit and a voice prompting circuit, wherein the alternating-current switch circuit is composed of a rectification bridge circuit, unilateral controllable silicon, a series diode, a resistor and an electrolytic capacitor; the timing circuit is composed of a resistor and a capacitor. An alternating current power supply is switched on only when a call incomes, and thus, the utility model prevents a transformer from overheating caused by long-time stand-by, potential safety hazards are eliminated, and the stand-by without the watt consumption is realized. The utility model which is connected with a telephone line and a recorder can realize automatic telephone answering and recording, message monitoring and telephone recording.

Description

No power consumption standby telephone answering and recording interface

The utility model relates to a kind of connection phone and recorder, to realize the interface arrangement of phone automatic answering machine, especially can realize the no power consumption standby of interface.

At present, known telegraphone, answer phone and telecord are when standby, and the primary winding of its ac power plug inside always is in on-state, stand-by time is long, can cause that power transformer is overheated, influence useful life, have potential safety hazard.

The purpose of this utility model provides a kind of telephone answering and recording interface, and it can not only make common recorder realize the telephone answering and recording function, and can not have power consumption when standby, increases the service life, and eradicates potential safety hazard.

The purpose of this utility model is achieved in that the electronic circuit of installing among the interface shell as shown in Figure 1.By bridge circuit QL ₁, one-way SCR KG ₁, diode D ₃, capacitor C ₃Form the electronic switch be controlled by phone ringing signal and off signal, its connecting mode be the bridge circuit output plus terminal with negative terminal between connect an one-way SCR and diode; The one-way SCR control utmost point is exported connect between the negative terminal resistance and electrochemical capacitor with bridge circuit.When the phone ringing signal passes through isolating transformer B ₂And diode D ₂To C ₃Charge, make KG ₁, D ₃Conducting, power transformer B ₁Elementary winding loop is just connected, and interface circuit and recorder are just started working.Work as talk-through, off signal generation and control optocoupler or relay contact are to C ₃Discharge, make KG ₁, D ₃Can not keep conducting, B ₁Elementary winding loop just disconnect, interface and recorder quit work.

Owing to adopt such scheme, only when phone was squeezed into, just power consumption of interface had realized no power consumption standby.

Below in conjunction with drawings and Examples the utility model is further specified.Fig. 1 is an electrical schematic diagram of the present utility model, and Fig. 2 is external form figure.

K among the figure ₁Be interface switch.K ₂For leaving a message and putting a tin change over switch.B ₁Be interface transformer, elementary winding also connects the recorder power socket.B ₂Be isolating transformer, elementary winding is by the capacitance line socket of answering the call.QL ₁, KG ₁, R ₁, C ₃Form electronic switch.☆ ₁LED ₃With ☆ ₁For being encapsulated in the optocoupler in the light tight housing, also can adopt general optocoupler, the coupling off signal.J is a relay.R ₇, W ₃, DW ₂, C ₅, BG ₃, constitute the voice timing circuit.W ₄, C ₇, R ₉, R ₁₀, B ₃, D ₅, C ₉, C ₆, R ₁₁, R ₁₂☆ LED ₄, BG ₄, BG ₅, BG ₆, DW ₃Constitute words control shutdown circuit.R ₅, W ₂, C ₂, DW ₁, BG ₂, R ₆, ☆ ₁LED ₃, BG ₂Constitute the interface timing shutdown circuit.

Circuit shown in Figure 1 is packed in the housing shown in Figure 2, answer the record interface.Recorder power plug, recording plug, telephone line plug are inserted respectively in the jack corresponding on the interface, and the record button of recorder is pressed, closed K ₁, interface is in idle consumption holding state.Because, by bridge circuit QL ₁, one-way SCR KG ₁, diode D ₃, capacitor C ₃The electronic switch of forming turn-offs.When the phone ringing signal occurs, through isolating transformer B ₂Coupling is to keeping capacitor C ₃Charge, make the electronic switch conducting.B ₁Elementary winding, recorder power is connected and is started working.Relay J gets electric, and first group of normally-closed contact J-1 disconnects, and power supply passes through R ₅, W ₂To C ₂W is adjusted in charging ₂Can change the interface setting operating time, second group of normally-closed contact J-2 disconnects (normally opened contact closure), makes W ₃, BG ₃, DW ₂, R ₇The timing sound circuit that the voice integrated package is formed is started working, and sends leaving message prompt.Because J-2 normally opened contact closure makes the telephone line through polar switching pass through W ₄Closure has realized the simulation off-hook.Work as C ₂Be charged to and make DW ₁Conducting, BG ₂Satisfy and close conducting, make ☆ ₁LED ₃The luminous photo resistance ☆ that causes ₁Become low-resistance by blocking-up, (or using optocoupler) makes BG ₁Conducting is kept capacitance voltage and is reduced KG ₁Turn-off B ₁First group of winding loop just disconnect, interface is realized ac dump.Also can utilize relay contact to make C ₃On electric charge bleed off, realize ac dump.The normally-closed contact closure of shutdown back J, C ₂, C ₅Discharge, interface recovers holding state.When ringing signal occurs, B ₂Secondary second winding passes through D ₁To C ₄Charging makes KG ₂Conducting, LED ₁The luminous leaving message prompt of doing.With K switch ₂Push 2 position, rewinding is put and is listened an announcement record.K ₁Closed again the demonstration disappears after the disconnection.Closed K ₃, transfer big W ₂, by W ₄, C ₇, BG ₄, R ₁₀, R ₉, W ₃, B ₃, BG ₅, C ₆, BG ₄, BG ₆, R ₁₁, R ₁₂, ☆ LED ₄, DW ₃The words control shutdown circuit that constitutes can make speech stop certain hour and send off signal, makes to keep capacitor C 3 discharges, realizes ac dump.

Claims (1)

1. A kind of no power consumption standby telephone answering and recording interface is made up of housing and electronic circuit, it is characterized in that: by bridge circuit QL ₁, one-way SCR KG ₁, diode D ₃, resistance R ₃, electrochemical capacitor C ₃Form alternating current switching circuit, its connecting mode is: connect between bridge circuit output plus terminal and the negative terminal one-way SCR and diode; The control utmost point is exported connect between the negative terminal resistance and electrochemical capacitor with bridge circuit; Isolating transformer B ₂A secondary terminating diode D ₂Positive pole, diode cathode connect the electrochemical capacitor positive pole, isolating transformer B ₂Secondary another termination electrochemical capacitor negative pole; The electrochemical capacitor positive and negative electrode meets triode BG respectively ₁, collector electrode and emitter, collector electrode and base stage connect two outputs of photoelectrical coupler respectively.

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