CN2511028Y

CN2511028Y - Security unit of main frame

Info

Publication number: CN2511028Y
Application number: CN 01254962
Authority: CN
Inventors: 李翀; 葛鹏庆; 徐柏利; 韩赛珍
Original assignee: Ningbo Tianyun Telecommunication Equipment Co Ltd
Current assignee: Ningbo Tianyun Telecommunication Equipment Co Ltd
Priority date: 2001-11-28
Filing date: 2001-11-28
Publication date: 2002-09-11
Anticipated expiration: 2011-11-28

Abstract

Provided is a protective unit of the master wiring stand. In specific, the utility model relates to a device which is arranged on the master wiring stand and is used to protect the safety of the telephone exchange. The utility model comprises a pair of input and output contact tablets with fixing blocks, a grounding terminal, a warning signal terminal which is arranged on the base and an indicator fixed on the circuit board. A protective element integrated block CLP is connected on the circuit board and is respectively connected with both terminals of the sample resistance that is connected between the input and the output contact tablets as well as is connected with the grounding terminal and the warning signal terminal. A protective switch is connected at the position of the input contact tablet. A thermal failure switch is connected between the grounding terminal and the warning signal terminal. The thermal failure switch is arranged in the casing and is integrated with the base. The thermal failure switch is connected into being by an insulation sleeve which is provided with a hot-melt block and connected with a copper sleeve outside as well as a spring which is connected with the warning tablet on the circuit board. The hot-melt block closely attaches to the integrated block CLP. Both the protective switch and the thermal failure switch of the protective unit are repairable and can be used repeatedly. The repair is easy and the protection performance of the utility model is perfect. Therefore, the utility model increases the reliability and sensitivity of protection and the use is safer.

Description

The Security Unit of main frame

Technical field

The utility model relates to a kind of post and telecommunications; be installed in the device that is used to protect telephone exchange safety on the main frame; the Security Unit of main frame carries out overvoltage, overcurrent first class of protection with it to telephone exchange user plate, protection attendant's the personal safety and the normal operation of switch.

Background technology

Though the Security Unit of existing main frame is various in style, function is different; but majority still adopts gas, semiconductor discharge tube to make over-voltage protection element, heat coil or semistor PTC and makes overflow protecting element, and overcurrent, overvoltage protection alarm device are arranged.

It is a kind of with the Security Unit of integrated package CLP as the main frame of overcurrent, over-voltage protection element that number of patent application 01253385.8 " Security Unit of main frame " just provides.

Summary of the invention

Technical problem to be solved in the utility model is: a kind of Security Unit of main frame is provided, makes its protective value more perfect, use safety and reliability, satisfy requirements of different users, and highly sensitive, protection speed is fast.

The technical scheme that the utility model technical solution problem is adopted is: the Security Unit of main frame is by a pair of input of band fixed block; the output contact chip; earth terminal; the alarm signal end is installed on the base and indicator light is fixed in the circuit board; also be connected with protection component integrated package CLP on the wiring board; respectively with input; the two ends of the sample resistance that connects between the output contact chip connect and earth terminal; the alarm signal end connects; and be connected with protection switch at input contact chip place; be connected with the thermal failure switch between earth terminal and alarm signal end; install in the enclosure and connect into whole the composition with base; and described thermal failure switch connects copper sheathing outward by the insulating case that has the hot melt piece; and the spring that is connected with alarm sheet on the wiring board connect constitute, described hot melt piece is close to integrated package CLP.

Compared with prior art; advantage of the present utility model is: protection switch in the Security Unit of the main frame of this structure and thermal failure switch all can be repaired; reuse; and the thermal failure switch has adopted the lower hot melt piece of heat fusion joint; the structure of being close to core protection component integrated package CLP, needing only one has big electric current to pass through, and makes integrated package CLP heating; the hot melt piece will melt, and thermal failure switch just action reaches the purpose that normal phase alarm is exported.The thermal failure switch of this kind structure can be supporting with various Security Units dissimilar, the main frame that has core protection component integrated package CLP structure, use, and the protection reliability and the sensitivity that have improved it are used safer.

Description of drawings

Fig. 1. structural representation of the present utility model (cutaway view).

Fig. 2. the vertical view of Fig. 1 (cutaway view).

Fig. 3. the utility model overvoltage, overcurrent protection line map.

Embodiment

Embodiment is further described the utility model below in conjunction with accompanying drawing:

Four jiaos of open slots that the band through hole is arranged of base (2) have protruding button in the middle of the two side, and adjacent has through hole.

Wiring board (9) front top edge, welding is indicator light (10) light-emitting diode fixedly, and lower end welding fixed card is connected on a pair of output contact chip (4) and the alarm signal end (1) on the holder (5), and the upper end is connected and fixed the thermal failure K switch ₃In alarm sheet (6).

Lower end, back side welding fixed card is connected on a pair of input contact chip (19) and the earth terminal (20) on the holder (18), and the upper end welding is integrated package CLP (15) fixedly, and its 1 leading foot is connected with the positive pole of indicator light (10) light-emitting diode.2,5 leading foots connect a pair of output contact chip (4) a ', b ' and sample resistance (11), (17) R ₁, R ₂An end, 3,4 leading foots that bull welds together and two protection switches (12), (16), K ₁, K ₂An end and the in addition end of sample resistance connect, protection switch end in addition is connected with a pair of input contact chip (19) a, b.

Heat portective switch K ₃By the centre ladder hole is arranged, be placed with the insulating case (13) of hot melt piece (14), the copper sheathing (8) of through hole is arranged in the middle of the outer jacket bottom surface, aspect ratio insulating case (13) is short, and be close to spring (7), and spring (7) is close to alarm sheet (6) formation that is weldingly fixed on the wiring board (9).Hot melt piece (14) one end faces on it are close to integrated package CLP (15) and are installed.

The wiring board (9) that assembles is inserted respectively on the relevant position in the base (2) by the output on it, input contact chip (4), (19), earth terminal (20), alarm signal end (1), put shell (3), utilize protruding button and shell (3) on base (2) two side to connect into integral body, the Security Unit of main frame is assembled into.

When circuit generation overcurrent or overvoltage; overcurrent, overvoltage enter from a pair of input contact chip (19); arrive integrated package CLP (15) inside; go up detected overcurrent, overpressure situation according to sample resistance (11), (17), or the door action makes outside line over the ground, ground is to alarm signal end closure; thereby realize discharging over the ground overvoltage, overcurrent; reach the purpose of overvoltage, current protection, while outputting alarm signal, indicator light (10) is bright.

When if long-time high voltage or big electric current take place in circuit; integrated package CLP (15) is except that having above-mentioned action; produce a large amount of heats simultaneously; make hot melt piece (14) fusing of being close to it; effect by spring (7); copper sheathing (8) moves up and contacts with earth connection on the wiring board (9); and alarm sheet (6) by linking to each other; make the bright generation alarm signal of indicator light (10); then heat makes protection switch (12); (16) action; reach the purpose of outside line open circuit, thereby eliminated because the hidden danger that high voltage or big electric current are encroached on personal and equipment has improved the reliability of protection.

Claims

1. the Security Unit of a main frame; by band fixed block (5); (18) a pair of input; output contact chip (19); (4); earth terminal (20); alarm signal end (1) is installed on the base (2); and indicator light (10) is fixed on the wiring board (9); also be connected with protection component integrated package CLP (15) on the wiring board (9); respectively with input; output contact chip (19); (4) sample resistance (11) that connects between; (17) two ends connect and earth terminal (20); alarm signal end (1) connects, and locates to be connected with protection switch (12) at input contact chip (19); (16); be connected with the thermal failure K switch between earth terminal (20) and alarm signal end (1) ₃, be installed in the shell (3) and connect into whole the composition with base (2), it is characterized in that described thermal failure K switch ₃By the insulating case that has hot melt piece (14) (13), connect copper sheathing (8) outward, and the spring (7) that is connected with alarm sheet (6) on the wiring board (9) connect constitute, described hot melt piece (14) is close to integrated package CLP (15).

2. Security Unit according to claim 1 is characterized in that heat portective switch K ₃By the centre ladder hole is arranged, be placed with the insulating case (13) of hot melt piece (14), the copper sheathing (8) of through hole is arranged in the middle of the outer jacket bottom surface, its aspect ratio insulating case (13) is short, and be close to spring (7), and spring (7) is close to alarm sheet (6) formation that is weldingly fixed on the wiring board (9).