CN2413422Y - Lightning arrester for telephone set and facsimile printer - Google Patents
Lightning arrester for telephone set and facsimile printer Download PDFInfo
- Publication number
- CN2413422Y CN2413422Y CN 99258320 CN99258320U CN2413422Y CN 2413422 Y CN2413422 Y CN 2413422Y CN 99258320 CN99258320 CN 99258320 CN 99258320 U CN99258320 U CN 99258320U CN 2413422 Y CN2413422 Y CN 2413422Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- resistance
- facsimile machine
- telephone set
- protective circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a lightning protector for a telephone and a facsimile machine, which is installed between an external line and a machine body, and the protector is composed of a protective circuit and a plurality of auxiliary circuits. The protective circuit acts when a dangerous voltage enters the external line, and accomplishes a goal of protecting the telephone and the facsimile machine. The utility model has the advantages of good reliability, high sensitivity and easy installation. The utility model has a function of lightning protection, can improve quality of a connection of the telephone, can prevent an interference of an outside high frequency signal, can stabilize a voltage and limit a current effectively, can prolong service life of the telephone, can be suitable for various exchanger users, telephone users, and facsimile machine users, and has no influence on an exchanger.
Description
The protector that the utility model relates to a kind of telephone set, facsimile machine lightning protection or ectocine circuit when causing high voltage.
Along with the fast development of modern communication technology, the adjustment of telecommunication department to the initial installation fee of telephones added in improving constantly of living standards of the people, and the user of telephone set, facsimile machine will grow with each passing day.But because telephone set manufacturer is many at present, dragons and fishes jumbled together unavoidably, and quality can not guarantee that more impossible have perfect safeguard measure, so the failure rate of telephone set is very high.The user of rural one-level particularly, away from cable distribution box, bifilar house lead in is long, the km that surpasses that has does not have special-purpose pole line when setting up, just set up along power line pole line or trees, when thunderstorm season and power line meet accident, be easy to make the induced electricity and the civil power entry-line of high voltage, big electric current, and telephone set, facsimile machine are burnt like this.It is a collection of that present rural telephone, the every dozen of thunder will make telephone set break down, and the annual telephone set of the user who has will be repaiied repeatedly, causes very big economic loss and mental burden to the user, makes troubles also for simultaneously the work of telecommunication department.Through factual survey, the telephone set more than 80%, facsimile machine all are because the lightning induction high-tension electricity causes telephone set, facsimile machine switching tube, integrated package punch through damage, and really cause damage seldom because of element problem.
The purpose of this utility model provide a kind of good reliability, highly sensitive, cost is low, long service life, telephone set, facsimile machine anti-lightening protector easy for installation.
For achieving the above object, telephone set of the present utility model, facsimile machine anti-lightening protector comprise box body, are provided with protective circuit in box body, and this protective circuit is included between two inlet wire circuits of box body and the rectifier diode D that connects
1, D
2, with these two rectifier diode D
1, D
2The resistance R that connects
5, piezo-resistance VR
1, bidirectional triode thyristor V
S, triode V
T, triode V
TBase resistance R
4, voltage stabilizing didoe D
3, be used for bidirectional triode thyristor V
SGive triode V during conducting
TBase stage the filter circuit of burning voltage is provided, and by four diode D
5, D
6, D
7, D
8The polar protective circuit that constitutes.
For insurance more, the output of described protective circuit is provided with the second class protection circuit, and this second class protection circuit is by on the outlet line of box body and a piezo-resistance VR who connects
2With one and piezo-resistance VR
2Arc-suppression circuit in parallel constitutes.
Be provided with current foldback circuit in the described protective circuit, this current foldback circuit is by laying respectively at two resistance R on the inlet wire circuit
1, R
2Constitute.
Be provided with the high frequency choke circuit in the described protective circuit, this high frequency choke circuit by on two inlet wire circuits respectively with resistance R
1, R
2The inductance L of series connection
1, L
2Constitute.
Owing to adopted protective circuit in the technique scheme, made that when dangerous voltage entered in the circuit, high-tension current was through rectifier diode D
1Or D
2, resistance R
5Make piezo-resistance VR
1Puncture bidirectional triode thyristor V
SConducting and at voltage stabilizing didoe D
3The above voltage of last generation 0.3V is by filter circuit and base resistance R
4Make triode V
TBase stage must conduct, so diode D
5, D
7Or D
6, D
8Conducting, outside line be by short circuit, thereby reach the purpose of protection telephone set, facsimile machine.As direct lightning strike or because of civil power breaks down when electric current in the outside line is sharply risen, the protective resistance R in the circuit
1, R
2Will blow, thereby outside line and telephone set, facsimile machine are disconnected.In addition because the output of protective circuit is provided with the second class protection circuit, as piezo-resistance VR
1In the time of breakdown, piezo-resistance VR
2Also can be breakdown and make line short, so just formed defence line, second road.The utility model good reliability, highly sensitive, cost is low, long service life, easy for installation, except that having lightning protection electric work energy, can also improve the speech quality of telephone set, prevent that extraneous high-frequency signal from disturbing, and voltage stabilizing current limliting effectively, prolong the useful life of phone, be fit to various switches and telephone set, facsimile machine user use, switch is had no effect.
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the schematic diagram of the utility model telephone set, facsimile machine anti-lightening protector;
Fig. 2 is the circuit diagram of the utility model telephone set, first kind of embodiment of facsimile machine anti-lightening protector;
Fig. 3 is the circuit diagram of the utility model telephone set, second kind of embodiment of facsimile machine anti-lightening protector.
As seen from Figure 1, telephone set of the present utility model, facsimile machine anti-lightening protector comprise box body 1, and this box body 1 is provided with inlet wire circuit 2,3 and outlet line 4,5.Inlet wire circuit 2,3 is connected with subscribers feeder, and outlet line 4,5 is connected with telephone set, facsimile machine, is provided with protective circuit between inlet wire circuit 2,3 and the outlet line 4,5.
As seen from Figure 2, set protective circuit is included between two inlet wire circuits 2,3 and the rectifier diode D that connects in the box body of telephone set of the present utility model, facsimile machine anti-lightening protector
1, D
2, with these two rectifier diode D
1, D
2The resistance R that connects
5, piezo-resistance VR
1, bidirectional triode thyristor V
S, triode V
T, resistance R
4, voltage stabilizing didoe D
3, light-emitting diode D
4, capacitor C
1, resistance R
3, capacitor C
2The π type filter circuit that constitutes, and by four diode D
5, D
6, D
7, D
8The polar protective circuit that constitutes.Wherein, resistance R
4Be triode V
TBase resistance, light-emitting diode D
4It is the protection indicator light.Described π type filter circuit is used for bidirectional triode thyristor V
SGive triode V during conducting
TBase stage a burning voltage is provided, prevent to mislead, with stability, the reliability of guaranteeing protective circuit, it also can substitute with a capacitor, can realize the purpose of this utility model equally.
As seen from Figure 3, telephone set of the present utility model, facsimile machine anti-lightening protector are provided with the second class protection circuit at the output of protective circuit, and it is by on the outlet line 4,5 and a piezo-resistance VR who connects
2With one and piezo-resistance VR
2Arc-suppression circuit in parallel constitutes, and this arc-suppression circuit is by capacitor C
3, switching diode D
9, D
10Constitute.Be in series with resistance R respectively on the inlet wire circuit 2,3
1, inductance L
1, resistance R
2, inductance L
2Wherein, resistance R
1, R
2Constitute a current foldback circuit, inductance L
1, L
2Constitute a high frequency choke circuit.Inductance L
1, L
2Be high frequency choke coil, the one, induction lightening is played certain iris action, the 2nd, the high-frequency interferencing signal in the feeder line is controlled, improve the conversation and the reception quality of telephone set, facsimile machine.Described arc-suppression circuit also can be made of a discharge tube, can prevent piezo-resistance VR equally
2Damage circuit in the moment back-pressure that disconnects.
Outside line under normal circumstances, feed current passes through resistance R
1, inductance L
1And resistance R
2, inductance L
2Enter telephone set, facsimile machine, triode V
TBecause of the base stage no-voltage ends, protective circuit is not worked, so do not influence the normal use of telephone set, facsimile machine.
When dangerous voltage enters in the circuit (the operating voltage limiting value of telephone set, facsimile machine is about 180V), high-tension current is through rectifier diode D
1Or D
2, resistance R
5Make piezo-resistance VR
1Puncture bidirectional triode thyristor V
SThe G utmost point have a pulse current to pass through, make controllable silicon V
SConducting, V
SAfter the conducting at voltage stabilizing didoe D
3On will produce the above voltage of 0.3V, protection indicator light D
4Bright, pass through resistance R
3, R
4Make triode V
TBase stage must conduct, triode V
TEmitter, the voltage between the collector electrode be 0.3V, thereby diode D
5, D
7(or D
6, D
8) conducting, outside line is by short circuit, thereby reaches the purpose of protection telephone set, facsimile machine.As direct lightning strike or because of civil power breaks down when electric current in the outside line is sharply risen, the protective resistance R in the circuit
1, R
2Will blow, thereby outside line and telephone set, facsimile machine are disconnected.As piezo-resistance VR
1In the time of breakdown, piezo-resistance VR
2Also can be breakdown and make line short, so just formed defence line, second road.
After the outside line high pressure disappears, protection indicator light D
4Extinguish bidirectional triode thyristor V
STurn-off triode V
TBase stage end because of losing voltage, it is normal that the outside line circuit recovers again.
Claims (6)
1, a kind of telephone set, facsimile machine anti-lightening protector comprise box body, it is characterized in that: described box body is provided with protective circuit in (1), and this protective circuit is included between two inlet wire circuits (2,3) of box body (1) and the rectifier diode (D that connects
1, D
2), with these two rectifier diode (D
1, D
2) resistance (R that connects
5), piezo-resistance (VR
1), bidirectional triode thyristor (V
S), triode (V
T), triode (V
T) base resistance (R
4), voltage stabilizing didoe (D
3), be used for bidirectional triode thyristor (V
S) give triode (V during conducting
T) base stage the filter circuit of burning voltage is provided, and by four diode (D
5, D
6, D
7, D
8) polar protective circuit that constitutes.
2, telephone set according to claim 1, facsimile machine anti-lightening protector, it is characterized in that: the output of described protective circuit is provided with the second class protection circuit, the piezo-resistance (VR that this second class protection circuit is gone up and connect by the outlet line (4,5) of box body (1)
2) and one and piezo-resistance (VR
2) arc-suppression circuit formation in parallel.
3, telephone set according to claim 1 and 2, facsimile machine anti-lightening protector is characterized in that: be provided with current foldback circuit in the described protective circuit, this current foldback circuit is by the resistance (R that lays respectively on two inlet wire circuits (2,3)
1, R
2) constitute.
4, telephone set according to claim 3, facsimile machine anti-lightening protector is characterized in that: be provided with the high frequency choke circuit in the described protective circuit, this high frequency choke circuit by on two inlet wire circuits (2,3) respectively with resistance (R
1, R
2) series connection inductance (L
1, L
2) constitute.
5, telephone set according to claim 1, facsimile machine anti-lightening protector is characterized in that: described filter circuit is by capacitor (C
1), resistance (R
3), capacitor (C
2) the π type filter circuit that constitutes.
6, telephone set according to claim 2, facsimile machine anti-lightening protector is characterized in that: described arc-suppression circuit is by capacitor (C
3) and two switching diode (D
9, D
10) constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99258320 CN2413422Y (en) | 1999-12-21 | 1999-12-21 | Lightning arrester for telephone set and facsimile printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99258320 CN2413422Y (en) | 1999-12-21 | 1999-12-21 | Lightning arrester for telephone set and facsimile printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2413422Y true CN2413422Y (en) | 2001-01-03 |
Family
ID=34040962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99258320 Expired - Fee Related CN2413422Y (en) | 1999-12-21 | 1999-12-21 | Lightning arrester for telephone set and facsimile printer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2413422Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103069788A (en) * | 2010-08-26 | 2013-04-24 | 佳能株式会社 | Facsimile communication apparatus and control method thereof |
| CN103686016A (en) * | 2013-11-28 | 2014-03-26 | 成都市宏山科技有限公司 | Television with three-level lightning protection function |
| CN103683254A (en) * | 2013-11-28 | 2014-03-26 | 成都市宏山科技有限公司 | Lightning protection circuit with high reliability |
-
1999
- 1999-12-21 CN CN 99258320 patent/CN2413422Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103069788A (en) * | 2010-08-26 | 2013-04-24 | 佳能株式会社 | Facsimile communication apparatus and control method thereof |
| CN103069788B (en) * | 2010-08-26 | 2015-09-02 | 佳能株式会社 | Facsimile communication equipment and control method thereof |
| CN103686016A (en) * | 2013-11-28 | 2014-03-26 | 成都市宏山科技有限公司 | Television with three-level lightning protection function |
| CN103683254A (en) * | 2013-11-28 | 2014-03-26 | 成都市宏山科技有限公司 | Lightning protection circuit with high reliability |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |