RU1828563C - Protective plug for distribution block of telecommunication installation - Google Patents

Abstract

The invention relates to electrical engineering. The goal is to simplify design and installation. The protective plug is equipped with fork spring contacts, the lateral ends of the plug of which are made by free cutting of their flat material, and they can spring deflect more in the plane of the material. They spring with their spring ends into the slot-shaped recesses of the housing of the protective plug. The surge arresters are provided with radially extending connecting pins that can be inserted between the lateral ends of the fork spring contacts. The distribution block is characterized by its simplicity and compact design. 7 c.p. f-ly, 5 ill.

Description

The invention relates to a protective plug for a junction box of a telecommunication installation, in particular a telephone installation, wherein the elongated protective plug comprises transversely mounted surge protection devices with each other.

The aim of the invention is to simplify the manufacture and assembly of contact elements.

In FIG. 1 is a cross-sectional view of a protective plug for a distribution block with surge protection arrears; in FIG. 2 is a longitudinal section through the protective plug of FIG. 1

along the line II - II fig.Z; in FIG. The 3-horizontal projection of the protective plug of FIG. 2; in FIG. 4 and 5 are a side view and another horizontal view of a protective plug with a cover.

According to FIG. t, 2 and 3, the protective plug 1 comprises a housing 2, a strip earthing switch 3 and contact elements 4. The housing 2 comprises chambers 5 for accommodating three-pole surge protection devices 6. Arrester 6 is equipped with connecting pins 7 that extend from them in a radial direction, which can contact with the contact elements 4 and the strip ground electrode 3. The contact elements end in

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The side extended from the chambers 5 by plugs 8 which can be inserted into the contacts of a distribution block not shown in the drawing. These counter contacts are connected, for example, with subscriber lines. Therefore, there is an electrical connection between the subscriber lines and the surge protectors 6.

The surge protection arrester 6 is arranged in series one after another across the longitudinal direction of the protective plug 1. Both end connecting pins 7 of the cylindrical surge protection arrears are in contact with the contact elements 4, the middle connecting pin 7 is connected to the strip grounding 3, thanks whereby overload currents occurring in the subscriber lines are diverted to the ground.

In the area of the connecting pins 7, the contact elements 4 and the strip ground electrode 3 are made in the form of fork spring contacts 9. The lateral ends of the fork spring contacts 9 are formed by free cutting of the flat material of the contact elements 4 and can deviate in the plane of the material. They spring with their spring ends into the slit-like recesses 10 of the dividing wall 11 of the housing 2. The recesses 10 are made as through longitudinal slots, the width of which slightly exceeds the diameter of the connecting pins 7. Due to this, the connecting pins when passing through the centering holes in the dividing wall 11 pass side between the ends of the spring contacts 9,

The strip ground electrode 3 is inserted with its base and held between the fork ledges 12 of the housing 2. The contact elements 4 and the strip ground electrode 3 extend with their material plane, mainly in the longitudinal direction of the protective plug 1, whereby the latter can have a corresponding narrow shape.

The end connecting pins 7 are axially attached to the dischargers b of overvoltage protection and bent in an arcuate manner in the radial direction. The partition wall 11 between the overvoltage protection discharges 6 and the spring contacts 9 is provided with centering holes 13 for the connecting pins 7. The outer walls 14 of the discharger 6 chambers 5 are provided with rectangular grooves 15 extending in the insertion direction. These grooves

open towards the chambers 5 for discharging, bending the insertion side and the direction toward the spring contacts 9. The connecting pins 7, with their arcuate section, enter the grooves 15 and are held here in the required position. Thus, upon insertion, the ends of the connecting pins 7 are precisely directed to the centering holes 13 and,

0 therefore, to the spring contacts 9. Thanks to this, it is possible to manually insert the surge protectors without auxiliary means into the protective plug 1 easily.

5 According to FIG. 4 and 5, the chambers 5 for the dischargers 6 are closed by a cover 16. It is made of springs flexible and in the open position, convex side facing the protective plug t. The lid is fitted on

0 one end made by injection molded axis 17, mounted in the housing of the protective plug 1 and mounted with the possibility of rotation. On the other end of the flat thin cover, there is provided a snap 5, which in the closed position of the cover engages with the inner side of the corresponding end wall 19 of the protective plug 1. When closing the cover 16, due to negative prestressing, the latter fits snugly against the upper side of the protective plug 1. why the chambers 5 for dischargers 6 are reliably protected from touching live parts.

Claims (3)

5 Claims 1. A protective plug for a junction box of a telecommunication installation, in particular a telephone installation, wherein the elongated protective plug contains several transverse protection arrears arranged in the transverse position adjacent to each other with the same direction extending from them, having wire shape 5 connecting pins inserted between the two ends of the fork spring contact of the protective plug, while the spring contacts of the protective plug are connected to the plug tabs, 0 in contact with the counter contacts of the distribution block, and in this case, the housing between the surge protection dischargers and the spring contacts is equipped with a separation barrier through which connecting pins can be inserted, characterized in that, in order to simplify the design and installation, the spring contacts made in the form of fork contacts, the side ends of the plug of which are made free cutting from a flat material with the possibility of bending in the plane of the material, and the free ends of the ends of the plug dressed in slit-like recesses of the dividing wall, the width of which slightly exceeds the thickness of the connecting pins. 2. The plug according to claim 1, characterized in that the plane of the material of the spring contacts extends in the longitudinal direction of the protective plug and the recesses are made in the form of through longitudinal grooves. 3. The plug according to Claim 1 or 2, in that the surge protection arrears are made three-pole and that the spring contacts for the middle connecting pins of the surge protection arrester are connected as one integral with a longitudinal strip earthing switch located in the insertion direction, and are in the plane of the material of the latter. A. The plug according to claim 1, characterized in that the surge arresters are installed along the protective plug perpendicular to the working side in at least one chamber of the housing of the protective plug, and the connecting pins are axially mounted to the ends of the surge protectors and from this position along the arc in the radial direction in the lateral outer walls the chambers are made extending in the direction of entry, open towards the surge protection grooves into the grooves into which the connecting pins enter at least partially and which face in the direction of the spring contacts. 5. The plug according to claim 4, characterized in that the discharge chambers are closed by means of a flexible-elastic cap and the cover on both end faces is made fastened to the protective plug and in the fixed position is adjacent to the protective plug with its middle part between both ends under the action of 5 prestressing. 6. The plug according to claim 5, characterized in that the cap immediately before applying it to the protective plug has an 8 longitudinal direction convex in the direction of the protective plug. 7. The plug according to claim 5, characterized in that the lid at least at one end is engaged with the possibility of fixing on the inside of the protective wall. 8. The plug according to claim 7. characterized in that the lid on the other end is mounted on the protective plug with the possibility of rotation. Priority on points: 06/28/89 for paragraphs. 1-4; 07/28/89 for PP. 5-8. /4 ryo. 1 // fig 2 AT 6 7- uchghachl 5 s 1 V tshshshshshshsht phage 4 & /  fs / g. 5 l rt t and, ts chuple ABOUT  about thirteen 1 8 T