CN2128810Y

CN2128810Y - Protector for telephone subscriber

Info

Publication number: CN2128810Y
Application number: CN92226100U
Authority: CN
Inventors: 余俊民
Original assignee: KEDIAN CO Ltd
Current assignee: KEDIAN CO Ltd
Priority date: 1992-06-29
Filing date: 1992-06-29
Publication date: 1993-03-24
Anticipated expiration: 2002-06-29

Abstract

The utility model relates to a protector for telephone subscribers, comprising a distributing seat, a conducting sheet, a connecting clipping sheet, a pressing sheet, a thermal resistor, an earthling clipping sheet, a lightning arrester, an earth plate and a casing, wherein, the distributing seat is utilized to separate into two pairs of interseptal distributing tables which are locked and fixed on a plurality of threaded holes by screws passing through the conducting sheet, the connecting clipping sheet and the pressing sheet. The thermal resistor and the lightning arrester with a bimetallic strip are utilized to form a protective circuit which limits over voltage and over current and can automatically revert. The overvoltage is bypassed to earth by the earth plate through the center electrode of the lightning arrester, and the over current is limited within a safety range by the thermal resistor. After a rear casing is covered, the utility model having the advantages of exquisite structure, high reliability and better electric surge preventing effect is formed.

Description

Protector for telephone subscriber

The utility model is a kind of improvement of telephone subscriber's protective device structure, is applicable to that the telephone subscriber holds as anti-surge protection device.

The protective device of telephone subscriber end now, structural volume is comparatively huge, and unusual overvoltage is made discharge prevention by the lightning arrester that is parallel in the circuit, and lightning arrester produces high temperature in the discharge back, if overlong time will be burnt lightning arrester.For avoiding lightning arrester to burn, the low-melting-point metals that invest on the lightning arrester that utilize are subjected to its high temperature and melt more, making lightning-arrest pipe interpolar produce short circuit, and then protection lightning arrester and communication equipment are unlikely impaired.Then utilize the blown fuse that is series in the circuit as protection to unusual overcurrent.Because the protection action though protected the safety of equipment, causes communication disruption as soon as effect often makes lightning arrester short circuit or blown fuse, practicality is greatly affected.

Main purpose of the present utility model is to have the protection effectiveness of device except having to practise; after abnormal conditions are eliminated; automatically reply function; the reason fuse does not burn or the tube short circuit of taking shelter from the thunder causes the communication disruption phenomenon; have the utility structure that has device to upgrade than habit, and possess more non-damageable high reliability.

Now as follows in conjunction with graphic detailed description structure of the present utility model:

Fig. 1 is a three-dimensional exploded view of the present utility model;

Fig. 2 is a three-dimensional combination figure of the present utility model;

Fig. 3 is the schematic diagram of lightning arrester bimetal leaf of the present utility model unlatching just often;

Fig. 4 is the schematic diagram of lightning arrester bimetal leaf of the present utility model closure when unusual;

Fig. 5 is a lightning protection line map of the present utility model.

Now referring to shown in Figure 1, structure of the present utility model includes:

Distributing base 1 is provided with two assembly line platforms 11, and distribution platform 11 is divided into several compartments 101,102 and 103,104, utilizes the space of compartment to hold protection circuit; Respectively be provided with a screw 12 on the distribution platform 11, and be provided with nested base 13, nested base 13 is provided with conduit 14,15, and conduit 14 communicates with compartment 103, and conduit 15 runs through whole distributing base 1, is inserted in a rubber waterproof cover 16 on the conduit 14,15; Other is if the groove 17 that earth plate 8 passes through on the distributing base 1; Distributing base 1 another side 18 can place a ground connection intermediate plate 6;

Guide card 2 has two kinds of different types, and wherein guide card 21,22 central authorities are provided with hole 211,221, are extended with weld tabs 212,222 on it, and is provided with the Extendible flake 223 of extension on the guide card 22 in addition, and guide card 2 is positioned on the distribution platform 11;

Connect intermediate plate 3, central authorities are provided with a hole 31, and an end extends an Extendible flake 32, connect intermediate plate 3 and are positioned on the guide card 22 of distribution platform 11;

Compressing tablet 4, central authorities are provided with hole 41, the hole 221 of the hole 41 of compressing tablet 4, the hole 31 that connects intermediate plate 3, guide card 22 is relative with the screw 12 of distribution platform 11, and the hole 211 of the hole 41 of compressing tablet 4, guide card 21 is relative with the screw 12 of distribution platform 11, and the two all is locked in respectively on the screw 12 by means of screw 10 and locatees;

Thermistor 5 is the thermistor (PCT) of two positive temperature coefficients, directly is welded on the weld tabs 212,222 of guide card 21,22, and inserts among the compartment 101,102;

Ground connection intermediate plate 6 is positioned on distribution seat 1 another side 18, and the jaw 61 of intermediate plate 6 upsides is arranged in compartment 104, and downside bending end 62 is inserted on the distribution seat 1 and joins with ground plate 8;

Lightning arrester 7 is a ternary gas lightning arrester (Three Element Gas Arrester), has three electrodes, is inserted in the compartment 104 of the distribution seat 1 that connects intermediate plate Extendible flake 32; Lightning arrester 7 has three electrodes, is spot

welding bimetal leaf

71,72,73, and bimetal leaf 72 is inserted in the jaw 61 of ground connection intermediate plate 6; Its central earth electrode 72 can be strip metal always, and two

electrodes

71 and 73 bend also close with it to it in addition;

Ground plate 8 has two bucker press strips 84,85 and that extend fixedly circular hole 81, one microscler guide groove 82, a reservation earth terminal 83, ground plate bending to extend connecting hole 86; Ground strip 8 directly is inserted in the groove 17 interior fits of distribution seat 1;

Outer cover 9 is a rain cover, has cover cyclization 91, a direction identification lead-in 92 and one and separates sheet 93; When outer cover 9 is inserted in the distribution seat 1, overlap cyclization 91 and connect with nested base 13, a side outlet that separates sheet 93 and distribution seat conduit 15 joins, and to intercept distribution, prevents the accidental short circuit situation;

By the combination of said structure, form a novel structure with restriction overcurrent and superpotential subscriber's protector.

The utility model can utilize thermistor 5 to limit stream to gush electric current, and the high voltage of bursting with lightning arrester 7 restrictions with

bimetal leaf

71,72,73, to ensure communicator safety.

Referring to Fig. 3 and shown in Figure 4, the

bimetal leaf

71,73 of the utility model is complications owing to the back high temperature that is produced of lightning arrester 7 discharges, thereby contact the bimetal leaf 72 of its central grounding electrode, cause short circuit phenomenon, make lightning arrester 7 unlikely continuous discharges produce high temperature; After lightning arrester no longer discharged, and temperature descends gradually, the bimetallic sector-meeting separated once again, if this moment, abnormal pressure was not got rid of yet, was then discharged once again by lightning arrester, continued above-mentioned steps; If abnormal pressure is got rid of, then make circuit conducting again, it is unimpeded to keep communication line.

The utility model utilizes positive temperature coefficient thermistor to make this install not reason to burn and interrupt the running of telecommunication network route, and has dwindled volume greatly, has improved the reliability and the practicality of equipment.

Claims

1, a kind of telephone subscriber's protective device is characterized in that including:

The distribution seat has two assembly line platforms and is arranged in two pairs of compartments of distribution platform, and platform is provided with several screws, cooperate outer cover and nested base, establish two conduits on the seat, a conduit communicates with a compartment, another conduit runs through the distribution seat, and distribution seat downside has one and holds the groove that ground plate is inserted in;

Guide card has two kinds of patterns, and the guide card upper end is equipped with circular hole and extends a weld tabs, and wherein a guide card is extended with Extendible flake;

Connect intermediate plate, central authorities are provided with circular hole, and an end is extended with Extendible flake, be positioned on the guide card, and relative with the circular hole of guide card;

Compressing tablet, central authorities are provided with circular hole, are positioned to connect on intermediate plate and the guide card, borrow screw that compressing tablet, connection intermediate plate, guide card and compressing tablet, guide card are locked on several screws of distribution platform;

Thermistor for having the thermistor of positive temperature coefficient, places the compartment of distribution seat, and with the guide card solid welding;

The ground connection intermediate plate which is provided with jaw, and downside is inserted in the distribution seat and joins with ground plate;

Lightning arrester is the ternary gas lightning arrester that each limit is welded with bimetal leaf, is arranged in the compartment of distribution seat, and the Extendible flake clamping that connects intermediate plate is borrowed in both sides;

Ground plate is provided with two and extends fixedly a circular hole and a microscler guide groove, and is provided with two press strips of an earth terminal and bending, also is provided with one and extends connecting hole, and it directly is inserted in the location by the groove of distribution seat;

Outer cover is a rainproof outer cover with cover cyclization, and there is a direction identification lead-in in the outside, and the inboard has a distribution area partition;

Be combined into telephone subscriber's holding device by said modules.

2, telephone subscriber's protective device as claimed in claim 1; it is characterized in that; the spot welding bimetal leaf of described lightning arrester is its three electrodes; center-point earth is strip metal very always; all the other the two poles of the earth are as benchmark bending and close with it, make it possess when unusual automatic protection closed because of being heated, unlatching just often and automatically reply effect.

3, telephone subscriber's protective device as claimed in claim 1 is characterized in that, described distribution seat is to be divided into several compartments by the distribution platform, utilizes the space of compartment to hold protection circuit in wherein, makes reduction in bulk, and reliability strengthens.