JPS5893428A - Safety device for communication - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is installed at the interface between an external cable and an in-office unit in an electronic exchange, etc., to protect in-office equipment from abnormal voltages and abnormal currents caused by lightning strikes or power line cross-contact. Regarding overconfidence security device.

Conventionally, this type of over-reliability safety device has fixed the base IC twill terminal to the track-side input terminal and the equipment-side output terminal, and connected the ground terminal to the track-side input terminal on the side of the track-side input terminal. In addition to incorporating an overvoltage protection means equipped with a spring means, the overcurrent protection means is equipped with a second spring means between the input terminal on the line m side and the output terminal on the equipment side, and at the @ of the output terminal on the equipment side. It had a built-in protection means, and the protection means and its spring means were arranged in a straight line on both the left and right sides of the I-Using, and were arranged substantially coaxially.゛Therefore, the overvoltage protection means, the overcurrent protection female means, and their spring means are disposed coaxially on both the left and right sides of the housing, resulting in a disadvantage that the area occupied by the communication security device increases. It was crowded. In addition, in this type of communication security device,
If the overcurrent protection means is activated by an abnormal current fILK,
Normally, only a metal path is provided between the output terminal on the IAM side and the ground terminal, and the output terminal is not released, so abnormal current will continue to flow in the subscriber circuit of the exchange O. There were drawbacks such as deterioration of the circuit package and the risk of burnout.

In view of the above-mentioned drawbacks, the present invention provides an overvoltage protection means which disposes a grounding terminal in the center part away from the pace, clamps the grounding terminal, and suppresses the grounding terminal toward the grounding terminal side by a first spring means. And 1IIIIIIl stuck to the pace
Pressed by a second spring means provided on the side of the m1ss output terminal between the input terminal and the device side output terminal, and connected to the m1ss side output terminal via a circuit opening spring member. By arranging and storing overcurrent protection means in a straight line in a housing, the area occupied can be reduced, and the communication security device does not cause deterioration or burnout of a subscriber circuit package due to abnormal current. The purpose is to provide.

The present invention will be described below based on embodiments shown in the drawings.

FIG. 1 is a front sectional view of an embodiment of the present invention, FIG. 2 is a side sectional view, and FIG. 3 is an internal connection diagram. In these drawings,
Reference numeral 1 is a paste made of an insulating material, and 2 is an insulating housing that is placed over the paste 1 and forms the outside of the device together with the paste 1. 3 is the ground terminal, which is located in the center apart from the paste 1 and has an approximately T-shaped conductor plate □ punched out of a metal material, one end of which is fixed to the paste, and the other end of which is fixed to the I/Using 2. It is integrally formed with the bottle 3'.

6 and 7 are line side input terminals (hereinafter referred to as input terminals).
A pair of conductor plates punched from a metal material are fixed at symmetrical positions separated by an appropriate distance around the ground terminal 3, and a bottle is connected to the pair of conductor plates and has one end fixed to the paste 1. It is formed from. 11 and 12 are SSt
The lower side output terminal is called the output terminal. ), of pace 1 and housing 2, I1. It is formed from a pair of conductor plates which are fixed to Ii and are punched out of a good metal material, and a bottle which is connected to these conductor plates and whose one end is fixed to the paste l.

4 and 4' are a pair of 4-voltage protection means, which are usually made of a ceramic tube (not shown) that forms a shear gap in an overvoltage state, and a gas tube with K metal electrodes (not shown) facing each other and filled with argon gas or the like. This is the arrester. The overvoltage protection means 4, 4' are provided between the input terminal 6.7 and the ground terminal 3 so as to sandwich the ground terminal 3, and are connected to the first spring means 5, 5', respectively.
It is compressed and supported by the ground terminal 311. 8.8
' is a pair of overcurrent protection means, which are connected in the event of an overcurrent condition and are used to prevent the Joule heat generated by the resistance wire (not shown) of the heating coil bobbin to open the gap between the input terminal 6゜7 and the output terminal 11.12. a hot wire ring for melting a fusible alloy (not shown);
A hot wire ring assembly is formed by bases 9 m and 8 m' made of conductors and lead wires @b and $b'. This overcurrent protection means 8.8' is connected to the input terminal 6.8'.
7 and output terminal 11.12 and input terminal 6
．． 7 and subjected to the pressure of second spring means 10, 10', respectively, pushing towards the bases 8a, 8m.
' are provided in electrical contact with the output terminals 1.1 and 12, respectively, via substantially U-shaped spring members 9.9' for circuit opening.

13 is an alarm terminal that is made by integrally fixing a conductor plate formed by punching the upper and lower parts of a metal material and bending them into a shape, and a bottle to which the pace IK is fixed, and is left open during normal times. It is arranged in contact with the ground terminal 3 to form an alarm circuit in the event of an overcurrent condition.

The respective terminals 3.6, 7.11.12.13 and the respective retaining means 4,4' and 8,8' are housed in the housing 2 in a linear arrangement.

The operation of the communication security device of the present invention configured as described above will be explained with reference to FIGS.

When an abnormal voltage is generated on the line between the line side input terminal 6゜7 and the ground terminal 3 due to a dielectric surge, the overvoltage protection means 4.4' consisting of a gas tube arrester discharges an arc and grounds the abnormal voltage. Discharge to earth via terminal 3.

On the other hand, when an abnormal current occurs, this abnormal current is transmitted between the line side input terminal 6.7 and the hot wire ring assembly (thermal coil, base s a
e s b', lead wires 8b, sb') flow through the overcurrent protection means 8, 8', the U-shaped spring member 9.9', and the ms side specific output terminal 1112, and the overcurrent protection means 8, 8' Due to the Joule heat of the resistance wire, the fusible alloy melts and is pushed up by the second spring means 10°10', and the base 81 #
8 a' and U-shaped terminal 6.7 and device side output terminal 11.12
*S* output terminals 11 and 12 are opened to prevent abnormal current from flowing to the *S* output terminals 11 and 12.

In this example, a gas tube arrester is used as an overvoltage protection means, and a hot wire shaft assembly is used as an overcurrent protection means, but it goes without saying that they can be replaced with those of other similar machines.

As described above, according to the present invention, the overvoltage protection means having a discharge function, the overcurrent protection means having a circuit opening function, the spring means, and each terminal are arranged in a straight line in the housing, so that the entire device is The occupied area can be reduced. Also,
Since the overcurrent protection means has a circuit opening function with the equipment side input terminal, it has an excellent effect of preventing deterioration or burnout of the subscriber circuit package (electronic parts, etc.) of the exchange.

[Brief explanation of the drawing]

O@ Screen Screen Figure 3 shows an internal connection diagram of the present invention. l...Base 2...Housing 3...Grounding terminal 4.4'...Overvoltage protection means 5.5'...!
[1 Spring means 6.7--Line side input terminal 8.8
'... Overcurrent protection means 9.9'... Spring member
10.1σ...second spring means 11.12...s
is output output terminal Applicant: NEC Corporation Figure 1 Figure 2 11 3Iσ First゛ 1 9' 9

Claims (1)

[Claims] Of the track side input terminal, equipment side output terminal, and ground terminal fixed to the pace, an overvoltage protection means is connected to the input terminal on the one circuit side and the key ground terminal, and the -one side input terminal and the equipment side A communication safety device in which an overcurrent protection means is connected between output terminals, the grounding terminal disposed in a central part separated from the base, and the W! an overvoltage protection means that clamps the ground terminal and is suppressed on the # distribution ground terminal side by the first spring means; and the above-mentioned The above-mentioned s
A communication security device characterized in that an overcurrent protection means connected to an SI side output terminal is arranged and housed in a straight line in a housing.