CN201919057U

CN201919057U - Interlocking device for party line telephones

Info

Publication number: CN201919057U
Application number: CN2011200509795U
Authority: CN
Inventors: 黄勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-02-28
Filing date: 2011-02-28
Publication date: 2011-08-03
Anticipated expiration: 2021-02-28

Abstract

The utility model belongs to the technical field of electronics and communication, and relates to an interlocking device for party line telephones, which comprises a telephone circuit, a telephone circuit polarity conversion circuit, a voltage stabilizing circuit, an off-hook interlocking circuit and an off-hook state indicating circuit. The interlocking device is characterized in that the telephone circuit polarity conversion circuit adopts four silicon rectifier diodes (D1, D2, D3 and D4) to form a full-bridge rectifying circuit, and the off-hook interlocking circuit consists of a one-way silicon-controlled rectifier and a triggering circuit thereof. The interlocking device for party line telephones realizes that in cases of both making a call or answering a call, only a user who realizes an off-hook state of a telephone has the right of conversation and users who realize an off-hook state of a telephone later cannot make a call or answer a call, thereby realizing conversation confidentiality and effectively preventing problems of monitoring, mutual interference and the like. The device completely utilizes feed of the telephone circuit without adding any control connecting wires, and has the advantages of simple installation and convenience in use. In addition, the device avoids the problem of separating an anode from a cathode when connected with an external wire, a large quantity of extension sets can be connected in parallel to the interlocking device, and the external wire is not affected during operation of the interlocking device.

Description

The party-line interlock

Technical field

The utility model belongs to electronic technology and communication technique field, relates to a kind of party-line interlock.

Background technology

Many units or family are easy to use for telephone set, in parallel two ones or multi-section telephone set on same telephone line.Because what generally adopt is simple parallel way, thus the some shortcomings of existing, as: when you were using wherein telephone set conversation, others can hear the sound that you converse on another telephone set; When on same the telephone line during in parallel 3 above telephone sets, the time regular meeting find the telephone line cisco unity malfunction.

In order to solve the variety of problems that multi-section telephone set in parallel exists on same telephone line, be necessary to study a kind of suitable party-line interlock of making.

This routine described party-line interlock realizes no matter calling or receive calls, and has only first off-hook person just to have the right to converse, and back off-hook person can not dial and can not receive calls, and has realized secret telephony, has prevented problems such as monitoring, interference effectively.It utilizes telephone line to carry out feed fully, need not to increase any control line, has the characteristics simple, easy to use of installing.Also have in addition: needn't divide both positive and negative polarity when this device is answered the call outside line; And the extension set quantity that connects is many; Having no effect to outside line during work.

Below describe related relevant technologies in the party-line interlock manufacturing process in detail.

The utility model content

Goal of the invention and beneficial effect: party-line interlock described in the utility model, realize no matter calling or receive calls, have only first off-hook person that executive right-of-way is just arranged, back off-hook person can not call, can not receive calls, realize the privacy problem of conversation, prevented problems such as monitoring, phase mutual interference effectively.This device utilizes telephone line to carry out feed fully, need not to increase any control line, has the characteristics such as simple, easy to use of installing.Also have in addition: needn't divide both positive and negative polarity when device is answered the call outside line; And the extension set quantity that connects is many; Having no effect to outside line during work.

Technical characterictic: party-line interlock, form by telephone line, telephone line polarity switching, voltage stabilizing circuit, off-hook interlock circuit, off hook state indicating circuit, it is characterized in that: the telephone line polarity switching adopts 4 silicon rectifier diodes, and (D1～D4) constitute full bridge rectifier, the off-hook interlock circuit is made of one-way SCR and circuits for triggering thereof.

The other parts circuit is formed and the mutual annexation of components and parts

1. telephone line polarity switching: it is characterized in that telephone line patch terminal L1 connects an end of full bridge rectifier input, connect the other end of full bridge rectifier input after the telephone line patch terminal L2 chained calls machine first, the cathode output end of full bridge rectifier is circuit anode (VCC), the cathode output end connection circuit ground (GND) of full bridge rectifier.

2. off-hook interlock circuit: form by voltage stabilizing didoe D5, resistance R 2, resistance R 1, one-way SCR (SCR), electrochemical capacitor C1, it is characterized in that: the negative pole connection circuit positive pole (VCC) of voltage stabilizing didoe D5, the positive pole of voltage stabilizing didoe D5 is with the end of connecting resistance R1 and the anode of one-way SCR (SCR), the two ends of resistance R 2 are attempted by the two ends of voltage stabilizing didoe D5, the other end of resistance R 1 is with connecing the positive pole of electrochemical capacitor C1 and the control utmost point of one-way SCR (SCR), and the negative electrode of the negative pole of electrochemical capacitor C1 and one-way SCR (SCR) is with connection circuit ground (GND).

3. off hook state indicating circuit: it is characterized in that the back connection circuit positive pole (VCC) of the cathode series resistance R3 of light-emitting diode (LED), the negative pole of light-emitting diode (LED) connects the positive pole of voltage stabilizing didoe D5.

The operation principle of circuit: form polarity switching by 4 rectifier diode D1～D4, make when answering the call outside line and can divide both positive and negative polarity.When treating attitude, each extension set hanging wire, telephone line is equivalent to direct current interruption, and promptly one-way SCR (SCR) is in cut-off state.When the phone incoming call, circuit ringing-current voltage breakdown voltage stabilizing didoe D5, and trigger one-way SCRs (SCR) by resistance R 2 and make it conducting, phone ringing.If telephone set first elder generation off-hook then is made of the DC channel of one-way SCR (SCR) the telephone set first, one-way SCR (SCR) makes keeps conducting state always, and LED is lighted simultaneously, the indication off hook state.Behind the telephone set first off-hook, the line voltage distribution of outside line L1, L2 drops to about 10V by 50V, other extension can unidirectional control silicon can't be breakdown because of voltage stabilizing didoe so keep cut-off state, thereby other extension set off-hook also can't be dialed or be answered.Its operation principle was identical when other each extension was called, and first off-hook person makes the corresponding first conducting of one-way SCR (SCR), and preemption uses telephone line person makes other extension all be in locked state simultaneously.Only draw in the accompanying drawing circuit of two parts machine can and connect the multi-section extension set by connection like this during actual the use.

Description of drawings

Accompanying drawing is the circuit working schematic diagram of party-line interlock.

Only draw in the accompanying drawing interlock circuit of two parts machine, that is: telephone set first, telephone set second; The dotted line signal in accompanying drawing left side can be according to the circuit connecting continued access multi-section extension of telephone set first.

Binding post L1 in the accompanying drawing, binding post L2 refute and insert the family telephone line.

Full bridge rectifier cathode output end in the accompanying drawing is circuit anode (VCC), the cathode output end connection circuit ground (GND) of full bridge rectifier.

Embodiment

Specification requirement according to party-line interlock circuit working schematic diagram shown in the drawings and description of drawings and the following stated components and parts is implemented, and can realize the utility model.

Components and parts technical parameter and selection

The used components and parts of the circuit of telephone set first are as follows:

1.D1～D4 is a silicon rectifier diode, model IN4001, D5 are voltage stabilizing didoe, and the voltage stabilizing value is 10V;

2.SCR be one-way SCR, operating current and withstand voltage parameter are 1A/400V;

3.LED be light-emitting diode, can select the red light emitting diodes of ￠ 5 for use;

4. the resistance of resistance R 1 is that the resistance of 10K Ω, resistance R 2 is that the resistance of 220 Ω, resistance R 3 is 430 Ω;

5.C1 be electrochemical capacitor, its capacity and withstand voltage parameter are 100 μ F/16V.

The technical parameter of the used components and parts of other each extension interlock circuit and require the same.

Make and circuit debugging

1. in the circuit of party-line interlock, as long as the electronic devices and components performance of selecting for use is intact, and the components and parts annexation in the accompanying drawing is welded to specifications, physical connection line and welding quality through scrutiny correct after, but circuit does not need just operate as normal of debugging substantially;

2. the voltage stabilizing value that it should be noted that voltage stabilizing didoe is 10V, when circuit debugging, might need to adjust slightly for different switches;

3. party-line interlock extension set does not surpass 6 ones at most, otherwise will influence the reliability of telephone line work.

Claims

1. party-line interlock, form by telephone line, telephone line polarity switching, voltage stabilizing circuit, off-hook interlock circuit, off hook state indicating circuit, it is characterized in that: the telephone line polarity switching adopts 4 silicon rectifier diodes, and (D1～D4) constitute full bridge rectifier, the off-hook interlock circuit is made of one-way SCR and circuits for triggering thereof.

2. party-line interlock according to claim 1, the feature of telephone line polarity switching is: telephone line patch terminal L1 connects an end of full bridge rectifier input, connect the other end of full bridge rectifier input after the telephone line patch terminal L2 chained calls machine first, the cathode output end of full bridge rectifier is circuit anode (VCC), the cathode output end connection circuit ground (GND) of full bridge rectifier.

3. party-line interlock according to claim 1, off-hook interlock circuit in the circuit is by voltage stabilizing didoe D5, resistance R 2, resistance R 1, one-way SCR (SCR), electrochemical capacitor C1 forms, it is characterized in that: the negative pole connection circuit positive pole (VCC) of voltage stabilizing didoe D5, the positive pole of voltage stabilizing didoe D5 is with the end of connecting resistance R1 and the anode of one-way SCR (SCR), the two ends of resistance R 2 are attempted by the two ends of voltage stabilizing didoe D5, the other end of resistance R 1 is with connecing the positive pole of electrochemical capacitor C1 and the control utmost point of one-way SCR (SCR), and the negative electrode of the negative pole of electrochemical capacitor C1 and one-way SCR (SCR) is with connection circuit ground (GND).

4. party-line interlock according to claim 1, the feature of off hook state indicating circuit is in the circuit: the back connection circuit positive pole (VCC) of the cathode series resistance R3 of light-emitting diode (LED), the negative pole of light-emitting diode (LED) connects the positive pole of voltage stabilizing didoe D5.