CN2115625U

CN2115625U - Telephone set detecting protector

Info

Publication number: CN2115625U
Application number: CN 92210040
Authority: CN
Inventors: 刘福仁; 欧艳鹏; 崔树春
Original assignee: LONGDA INDUSTRY Co DALIAN
Current assignee: LONGDA INDUSTRY Co DALIAN
Priority date: 1992-01-08
Filing date: 1992-01-08
Publication date: 1992-09-09

Abstract

The utility model relates to a detecting protector of a telephone set, which is a set of electronic circuit structure connected between the telephone set and an external signal line. The utility model comprises a circuit of a high-voltage switch and the circuit of a single-phase rectifier; the circuit of a high-voltage switch and the fuse connected with the circuit of the high-voltage switch in series complete the task to prevent that the strong electricity entering into the telephone line harms the telephone set; the rectifier and the indicating lamp connected with the rectifier complete and the detecting and the showing tasks of the failure mode appearing in the telephone series. The utility model has the advantages of simple structure, convenient installation.

Description

Telephone set detecting protector

The utility model relates to a kind of telephone set and detects protector.

Along with rapid development of economy, present application phone popularity rate both domestic and external improves day by day.And telephone set be extensive use of the problem of bringing; A lot of coiled telephone machines are all arranged because of the cisco unity malfunction that breaks down every day, which kind of fault what do not make appearance when usually another clear is, fixes a breakdown to the end and often will take a long time from searching the source of trouble like this, wastes a lot of manpower and materials.In all multiple faults, the most serious is the forceful electric power phenomenon to occur sealing in the telephone line, and this is entail dangers to telephone set even personal safety usually, and society and user are sustained a loss.

The utility model purpose is: be to solve existing the problems referred to above in the prior art, provide a kind of forceful electric power of not only having protected telephone set not sealed in circuit to damage but also can detect intuitively the detection protective device of kind that telephone set breaks down.

The utility model is achieved in that it is that a cover is connected in the electronic line structure between telephone set and the external signal line, its input and external call holding wire termination join, output and telephone set signal input part join, in parallel a high voltage switch circuit and a circuit that is in series by single-phase rectifier and luminous indicating lamp also are being connected in series one section fuse at input between the high voltage switch circuit of parallel connection between two terminations of its output.

When specifically implementing the utility model such scheme, can adopt one-way SCR to realize to its high voltage switch circuit.

Accompanying drawing is the electrical schematic diagram of the utility model embodiment.

Below in conjunction with drawings and Examples the utility model is done further narration:

In fact, of the present utility model installing and using as the ordinary telephone set terminal box, it is near only to need that box body is fixed on the telephone set symbol, can learn by the state of observing its indicator light which kind of fault telephone set is just sinking among.

As shown in Figure 1, S of the present utility model in this example ₁, S ₂Join as input and telephone signal outside line; One section fuse RD of series connection on the circuit; S ₃, S ₄Join as output and telephone set; At fuse RD and output S ₃, S ₄Between circuit on A, the parallel connection of B point-to-point transmission a switching circuit and an indicator light circuit.In this example, adopt unidirectional controllable silicon S CR as switch, with DW ₁, DW ₂Two voltage stabilizing didoes and resistance R ₁Series arm is as the control utmost point of SCR, one with SCR diode D in the same way ₁One input and the voltage stabilizing branch road that terminates at A point place, the other end and the SCR of circuit joins, and the output of controllable silicon SCR is connected on circuit B point place.This switching circuit is that the forceful electric power that is used to protect telephone set to be sealed in signal line damages: press (as 220V) train of signal fashionable as forceful electric power, this voltage at first is added on the controllable silicon SCR, voltage-stabiliser tube DW ₁, DW ₂The voltage stabilizing value at 80V, The whole control utmost point branch road series connection conducting voltage is 160V, so press signal 〉=160V as long as seal in forceful electric power, controllable silicon SCR gets final product conducting, and A, the voltage drop of B point-to-point transmission are D ₁With SCR conduction voltage drop sum: 1.5V, so just, can in the loop that the SCR of input and conducting branch road is constituted, produce a powerful short circuit current, this electric current fuse RD that will fuse immediately, then just cut off the utility model and telephone set connect, prevented effectively that the forceful electric power signal from entering telephone set.In this example, the indicator light branch road be at A, B point-to-point transmission with a miniature indicator light XD and one by D ₂～D ₅The single-phase bridge rectifier that four diodes constitute is in series, D in parallel on the rectifier output end ₆～D ₉A four diodes series connection voltage stabilizing branch road and a LED that is connected in the same way.Four diodes can be with rectifier output signal V ₁Voltage stabilizing is at 2.8V, so all can make the LED red lamp flass when rectifier output 〉=2.8V; When applied signal voltage is in 45V～100V scope, but indicator light XD green light operate as normal, its operating current is at 0.05A～0.11A, and therefore in above-mentioned change in voltage scope, XD is also luminous differently with light and shade.When the operator will detect telephone set and whether fault arranged, AN:1.LED was luminous for the inching button switch that can close, and shows that fault is at telephone set itself; 2.LED not luminous, show the no signal input, then fault is at telephone office or outbound system; 3.LED all luminous with XD, can detect the signal amplitude height of judging circuit; 4.LED it is luminous, XD is not luminous, shows that applied signal voltage is lower than 45V.

The utility model advantage is:

1. can prevent that the forceful electric power signal from invading and harassing telephone set, guarantee user and telephone set inherently safe.

2. can detect intuitively immediately the various faults that telephone set occurs, be convenient to the user and in time solve.

3. simple in structure, reliable, be convenient to popularize use.

Claims

1, a kind of telephone set detects protector; it is characterized in that: input and external call signal termination join, output and telephone set signal input part join; in parallel a high voltage switch circuit and a circuit that is in series by single-phase rectifier and luminous indicating lamp also are being connected in series a fuse at input between the high voltage switch circuit of parallel connection between two terminations of output.

2, protector according to claim 1; it is characterized in that: high voltage switch circuit is realized by an one-way SCR switching circuit; two 80V voltage stabilizing didoes are together in series as the control utmost point of thyristor; one joins with controllable silicon input and voltage-stabiliser tube branch road forward end with diode one end that thyristor is connected in the same way, and the other end and fuse join.

3, protector according to claim 1 and 2; it is characterized in that: single-phase rectifier is by the XD indicator light that a single phase bridge type rectifier circu is realized, one of its input series connection can be luminous under 45V～100V direct current signal, and its output is in parallel in the same way at the diode series arm of 2.8V and LED light-emitting diode by a voltage stabilizing.