CN2528142Y - Safety unit of general distributing frame - Google Patents

Abstract

A security unit of a main distribution frame is a device installed on the main wiring and used for the protection of the safety of telephone exchanges, in which a pair of inner and outer line contact pieces is respectively fixed on both sides of a circuit board with an indicator light. Both sides of the circuit board are also linked with a framework provided with an alarming connecting plate and a protective element integrated block CLP. The integrated block CLP is respectively connected to both ends of a sampling resistor linked between the inner and outer line contact pieces, a grounding pin and an alarming pin. Moreover, the outer line contact piece is linked with a protection switch. A thermal failure switch is connected between the grounding pin and the alarming pin. The grounding and alarming pins are installed inside an overall assembly formed inside a shell after connected to a base. The inside of the framework is provided with a grounding pin and an alarming piece fixed on the circuit board. A spring clung with the grounding piece is disposed, and an action piece clung with a hot-melt block and the spring is disposed, while the thermal failure switch is formed from the coordination of the action piece and the alarming piece. The hot-melt block is clung to the integrated block CLP. Both of the protection switch and the thermal failure switch can be repaired and reused. Therefore, the protection performance of the utility model is better, and the protection reliability and sensitivity of the utility model are enhanced with much safer use.

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, 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 and 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, and highly sensitive, protection speed is fast, for market provides many kinds, satisfies requirements of different users and selection.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: the Security Unit of main frame is by in one pair; the outside line contact chip is separately fixed on the two sides of wiring board of tape light; also be connected with the framework and the protection component integrated package CLP of band alarm brace on the two sides of wiring board; integrated package CLP is respectively with interior; the two ends of the sample resistance that connects between the outside line contact chip connect and grounding leg; the alarm pin connects; and be connected with protection switch at outside line contact chip place; grounding leg; be connected with the thermal failure switch between the alarm pin; grounding leg; being installed in the integral body that constitutes in the housing after alarming pin and base being connected forms; and described thermal failure switch is by fixing ground strip in the circuit board is installed in the described framework; the alarm sheet; being close to ground strip puts into spring and is close to the hot melt piece and spring is put into action movie; and action movie cooperate with the alarm sheet 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 can alarm output for a long time.The thermal failure switch of this kind structure is installed in and makes its more compact structure in the framework and volume is little; it is more reliable to work; can be supporting with various Security Units dissimilar, the main frame that has core protection component integrated package CLP structure, use; improved its protection reliability and sensitivity, used safer.

Description of drawings

Fig. 1. structural representation of the present utility model;

Fig. 2. the vertical view of Fig. 1;

Fig. 3. the upward view of Fig. 1;

Fig. 4. the utility model overvoltage, overcurrent protection line map.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

On framework (4) one sidewalls opening is arranged, there are dividing plate, groove (21) and sash in the centre, the two side and on sash in the strip of caulking groove (20) is arranged.

One surperficial top edge of wiring board (5); welding is indicator light (6) light-emitting diode fixedly; the fixing alarm of lower edge welding pin (22), grounding leg (13); a middle end is welded with the two ends of interior lines contact chip (12); end welds fixedly integrated package CLP (9) in addition; its 1 leading foot is connected (alarm signal end) with the positive pole of indicator light (6) light-emitting diode; 2,5 leading foots connect the end that a pair of interior lines contact chips (12) a ', b ' reach a pair of sample resistance (7), (11), 3,4 leading foots that bull welds together and two protection switches (8), (10) 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 outside line contact chip (2) a, b.

Wiring board (5) in addition surperficial lower end welding is outside line contact chip (2) fixedly, the upper end is connected with framework (4), in the caulking groove (20) of framework (4), insert ground strip (15), alarm sheet (19), alarm brace (14) and it is weldingly fixed on the wiring board (5), alarm brace (14) one ends are connected with alarm pin (22), and an end is connected with indicator light (6).

Heat portective switch K ₃By in the middle sash of framework (4), be close to ground strip (15) and put into spring (16), an end of tight embedding hot melt piece (18) in its groove (21), and

Shape action movie (17) inserts in the caulking groove (20) and cooperates with alarm sheet (19), and is close to holding in addition and constituting of hot melt piece (18), spring (16), and hot melt piece (18) lower surface is close to integrated package CLP (9) installation.

The wiring board (5) that assembles is inserted base (1) respectively by the grounding leg on it (13), alarm pin (22) to be gone up in the corresponding jack, put shell (3) and utilize two protruding buttons and shell (3) on the base (1) 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 outside line contact chip (2); arrive integrated package CLP (9) inside; go up detected overcurrent, overpressure situation according to sample resistance (7), (11); or door action make outside line over the ground, to alarm pin closure, thereby realize discharging overvoltage, overcurrent over the ground, reach the purpose of overvoltage, overcurrent protection; while outputting alarm signal, indicator light (6) is bright.

When if long-time high voltage or big electric current take place in circuit, integrated package CLP (9) is except that having above-mentioned action, produce a large amount of heats simultaneously, make hot melt piece (18) fusing of being close to it, by the effect of spring (16), pushing action sheet (17) forward, it is contacted with alarm sheet (19) on the wiring board (5), and, make connected indicator light (6) bright by alarm sheet (19), send alarm signal.Then, make protection switch (8), (10) action, reach the purpose of outside line open circuit, thereby eliminated the hidden danger that the person and equipment are subjected to high voltage or big electric current infringement, improved the reliability of protecting by a large amount of heats that produce.

Claims (3)

1. the Security Unit of a main frame; in one pair; outside line contact chip (12); (2) be separately fixed on the two sides of wiring board (5) of tape light (6); also be connected with the framework (4) and the protection component integrated package CLP (9) of band alarm brace (14) on the two sides of wiring board (5); integrated package CLP (9) is respectively with interior; outside line contact chip (12); (2) sample resistance (7) that connects between; (11) two ends connect and grounding leg (13); alarm pin (22) connects; and locate to be connected with protection switch (8) at outside line contact chip (2); (10), grounding leg (13); be connected with the thermal failure K switch between alarm pin (22) ₃, grounding leg (13), alarm pin (22) and be installed in housing (3) after base (1) is connected in the integral body composition of formation, it is characterized in that the thermal failure K switch ₃By ground strip (15), the alarm sheet (19) that is fixed on the wiring board (5) is installed in the described framework (4), being close to ground strip (15) puts into spring (16) and is close to hot melt piece (18) and spring (16) is put into action movie (17), and action movie (17) with the alarm sheet (19) cooperate constitute, described hot melt piece (18) is close to integrated package CLP (9).

2. Security Unit according to claim 1 is characterized in that on framework (4) one sidewalls opening being arranged, and there are dividing plate, groove (21) and sash in the centre, the two side and on sash in the strip of caulking groove (20) is arranged.

3. Security Unit according to claim 1 is characterized in that heat portective switch K ₃By in the middle sash of framework (4), be close to ground strip (15) and put into spring (16), an end of tight embedding hot melt piece (18) in its groove (21), and Shape action movie (17) inserts in the caulking groove (20) and cooperates with alarm sheet (19), and is close to holding in addition and constituting of hot melt piece (18), spring (16), and hot melt piece (18) lower surface is close to integrated package CLP (9) installation.