NO873577L - COMPONENT ASSEMBLY FOR SECURING ELECTRIC CABLES IN TELECOMMUNICATIONS. - Google Patents

Description

The invention relates to a component assembly for securing electrical lines in distributors in telecommunications, especially telephone networks.

Such a flat assembly is known from DE-PS 3212013. According to this, the assembly is equipped as a single component with current fuses in a row one after the other and can be connected to a socket in a layer component in a distributor in a telephone exchange. External wires leading to subscribers and internal wires leading to stations in the nn r e tnmqs,

is connected to the layer components' blade terminals which are connected to the sockets. The small tubular fuses extend transversely to the row direction of the fuses. These are attached at the poles at their ends between highly curved legs of contact parts which extend from the poles on either side of a carrier part of the component and to the sockets. The spring legs are bent by the contact parts about a bending edge lying in the longitudinal direction of the fuse. It can be seen in the drawing that the contact parts in the flat state in the area of the spring legs have a width that is greater than the distance between the fuses. In a punch strip1, the distance between the contact parts1 is thus significantly greater than for the assembly. The plate consumption is correspondingly large and the pre-bent contact parts must be connected as individual parts to the carrier part, e.g. by spraying.

The purpose of the invention is to enable a material- and time-saving placement of the contact parts.

This purpose is achieved by the invention according to claim 1. The width of the contact 1 is now no greater than it is in the clamping area. The dividing width between the fuses is dimensioned according to the thickness of the fuses at the poles, the width of the spring legs,

as well as the minimum distance between the contact parts. As the fuses at the poles themselves are relatively thin, the 1inq distance can be reduced, so that a smaller total width of the layer component together with the assembly is obtained. The contact parts each extend at the same distance in a plane so that they can be used together on a strip connected over a connecting link

in the honor section. Then the connecting links are e.g. cut by punching and the contact parts galvanically separated. The power fuse rings can e.g. be made as flat, small circuit boards or elements shaped like small tubes whose poles are made flat by pressing.

The contact parts for the fuses are designed flat in the area. Their shape is achieved with a simple punch outline which is produced in one step. Such contact parts hold better measurements than bent parts, which also require a higher production effort.

Advantageous further developments of the invention are shown in claims 2-10.

In the further development according to claim 2, extremely simple contact parts are obtained. The carrier part is designed as a simple, double-sided coated circuit board which can be produced cheaply. The contact parts can be inserted into through-contacted solder eyes

in the circuit board and can e.g. connected to these by flow sintering.

In the further development according to claim 3, the contact parts are simultaneously designed as connecting parts to the layer component's sockets. The foot piece on the fork-shaped contact part can be placed in the flat area, so that the fuse can be inserted with a small distance to the carrier part. Thereby, it is possible to reduce the height of the finished assembly.

The further development according to claim 4 assumes that for each wire in a subscriber's line a current circuit is placed. This is provided at both ends with contact surfaces that are held in gaf felf worm spring contacts on the assembly. With such individually used fuses, due to deviations in the electrical properties, disruptions to the wiring symmetry of a double branch can occur.

When joining two fuses in a component, it is possible to adapt the resistance value of both fuses to a high degree. By blowing through one fuse, it is ensured that the other fuse is also replaced and that a new pair of fuses, which have already been matched to each other from the factory, can be inserted.

The further development according to claim 5 makes it possible to sort the individual fuses according to their resistance and in each case put two identical fuses into the box.

The further development according to claim 6 enables the manufacture of both fuses in one step under the same conditions. In this way, agreement between the resistance values can also be achieved to a high degree here. In addition, there are cost advantages in manufacturing and assembly.

In the further development in accordance with claim 7, both current flows are refined in one working session under equal conditions, so that the symmetry of the flow in one is not weakened.

The securing wires according to claim 8 can be obtained from two immediately following parts of a long wire. These two parts are mainly of the same nature, which has a beneficial effect on the symmetry of the joint in one. The fuse wires are also suitable for smoothing steep transients due to their ductility.

The further development according to claim 9 makes it possible to arrange two separate connections on each of the two ends of the foot piece.

In the further development according to requirement 10, it is possible

also to use assemblies without current in the coils, without the conductor paths being broken.

The further development according to claim 11 is based on a component assembly according to DE-PS 25 08 845. According to this, the component is an injection-moulded support part provided with built-in contact pieces that extend along a longitudinal edge of the support part is provided with contact surfaces for the layer component's sockets . Towards the other end, the contact pieces are provided with contact zones in the plane of the carrier part for the solder pieces that lie against the surge arresters. The surge arresters stand with their central axes vertical to the support part. On the rear side of the assembly facing away from the contact surfaces, there is a grounding multiple bent from a plate with a U-shaped cross-section and with spring fingers against which the poles of the surge arrester 1 facing away from the support part rest.

The contact pieces show a U-shaped raised portion that projects near the free ends of the springs. This part is located between the surge arrester and the contact surfaces. The distance between the raised parts and the spring finger is less than the thickness of the forged pieces. In the event of a prolonged, persistent overload, these melt, so that the contact piece is short-circuited to earth.

A similar U-shaped bend requires a plane corresponding to the leg position. In addition, the leg's two sides must be given a sufficient installation length for the bending tool. The height of the bend can only be carried out with a small degree of accuracy, as with such multiple bends a considerable rebound must be expected, which varies depending on the material thickness

and the material properties. As a result, the distance to the spring fingers of the ground-mold plug changes, so that the exact fit cannot be achieved with complete safety.

In the further development in accordance with claim 11, the component group's manufacturability and functional reliability are improved. The raised part in the form of a single ear has only one bend which can be produced with a simple tool. An1 eggsf 1 aten

to the spring fingers is the free punched end side of the contact ear.

In the flat state, the position of this end face can be determined with high accuracy. By subsequent bending around the only bending edge, the distance between the end side of the contact ear and the foot of the contact piece can also be kept exactly. The strip-shaped contact ears can be embedded to a large extent in the carrier part by spraying, so that their position is reliably stabilized. The contactor can be bent up very close to the surge arrester, which provides a significant space saving.

In the further development according to claim 12, the length and width of the unbent contact piece can be kept small. The contactor can be arranged on the side of the surge arrester that faces away from the rear. The grounding mu111ppe1 points its grounding fingers in this direction, so that it can be designed as a U-shaped plate part that surrounds the rear of the assembly.

In the further development according to claim 13, a space-saving form of the contact pieces is obtained. Thereby, it is also possible to supply the assembly with the current rings. According to DE-PS 32 12 013, the bending axes for the contact parts lie parallel to the longitudinal direction of the contact pieces, so that these in the unbent state have a greater width. According to the invention, the contact part for no current and the contact ear can lie close to each other, which provides a particularly space-saving device.

In the following, the invention will be explained in more detail in connection with execution examples shown in the drawing. Fig. 1 shows a section through part of an electrical component assembly with currents. Fig. 2 shows an elevation of part of the assembly according to fig. 1. Fig. 3 shows the assembly according to fig. 1 view from above. Fig. 4 shows a section through another assembly with a power fuse. Fig. 5 shows in perspective a box for placing two current fuses. Fig. 6 shows in perspective the box according to fig. 5 with current in the rings immediately before insertion into the spring contacts of an electrical component assembly. Fig. 7 shows a double current fuse with etched current flows as well as a pair of other spring contacts in the electrical assembly.

Fig. 8 shows a double current fuse according to fig. 7

with loop-shaped securing wires.

Fig. 9 shows a double current fuse according to fig. 8

with rectilinearly arranged fuse wires and a pair of open spring contacts.

Fig. 10 shows a simple circuit breaker corresponding to fig. 9.

Fig. 11 shows a side view through an assembly with current fuses and surge arresters. Fig. 12 shows the assembly according to fig. 11 seen from above. Fig. 13 shows an elevation of a contact part of the assembly according to fig. 12.

According to fig. 1 and 2, an assembly 1 consists of a double-sided printed circuit board 2 with contact parts 3 and current circuits 4.

The circuit board 2 has along a longitudinal edge and perpendicular to this running contact surfaces 5, which are contacted with sockets 6 in a layer component in a distributor in a telephone exchange. The sockets 6 are each arranged to an outer contact spring 7 and an inner contact spring 8 on a layer component in a distributor in a telephone exchange. The external contact springs 7 are connected to the outgoing subscriber lines and the internal contact springs 8 to the internal lines going to the exchange. The outer and inner contact springs 7 and 8 are connected to each other in pairs over the contact surfaces 5, the current paths 9, the contact parts 3 and the current rings 4.

The current conductors 4 are designed as elongated, flat, small fuse plates which with their longitudinal edges stand vertically on the circuit board 2. They also extend mainly like the conductor paths 9 vertically on the longitudinal edge of the component assembly 1 and are arranged parallel in a row to this.

The current circuits 4 are designed as printed circuit boards, at the ends of which the poles 10 are designed as flat contact zones which are connected to each other over a finely ground, thin fuse path 11. The contact parts 3 are inserted into through-contacted solder eyes connected to the current runs 9 by a soldering pin 12 and soldered in these. They are designed as flat small plates on which a central longitudinal slot with an opening to its free end is punched out. On both sides of this longitudinal slot, spring legs 13 are thereby formed which spring clamp the current in the rings 4. Thereby they are in contact with the poles of the current in the rings 4.

1 according to fig. 4, other contact parts 14 in the same contact areas of the current rings 4 are designed in the same way as the contact parts 3 according to fig. 2. The printed circuit board 2 has, however, been replaced with a carrier part 15 made of injection molding in which the contact parts 14 are built-in. At one end, these form the contact surfaces 5 for the sockets 6 of the external and internal contact springs 7 and 8. At their other end, the spring legs 13. From the contact surfaces 5, the contact parts 14 are led flat from the carrier part 15 to under the poles 10

on the power rings 4 and bent at right angles to these. The spring legs 13 are attached immediately above the carrier part 15, so that the current fuse 4 has a small distance to the carrier part 15.

According to fig. 5, a single current fuse 21 consists of a plate-shaped foot part 22, contact surfaces 23 on both ends of the foot part 22 and a thin, etched current flow 24, which connects the two contact surfaces 23 to each other. The two current rings 21 with equal electrical properties are each pushed in the direction of the arrow into the receiving openings 25 of a box 26 and clamped in this. The box 26 is shorter than the power rings 21, so that the contact surfaces 23 in the inserted state can protrude to both sides.

According to fig. 6, the two current fuses 21 fixed in the box 26 with two ends can be pushed in between the fork 1 shaped spring contacts 17 on an electrical component assembly 28. The spring contacts 27 are connected to electrical current flows in the assembly 28. The current flows lead to socket points not shown, to which the contact springs in the distributor connected to the branches of the subscriber lines can be connected.

According to fig. 7, the two current fuses in a double current fuse 29 are joined on a common foot piece. The double current fuse 29 has at both ends and on both sides a total of four contact surfaces 23. Two and two of the contact surfaces 23

are connected to each other at one end via a through-contacted solder eye 32 and a thin, etched, loop-shaped arranged current flow 24. The two current flows 24 are arranged next to each other on the same side of the foot piece 30. No current flows 29

with its contact surfaces 23 can be inserted between galvanically separated legs 32 on other spring contacts 33. When the fuse 29 is removed, the legs 32 lie immediately against each other with their contact points, so that the electrical connection is maintained even when the fuse is removed.

According to fig. 8, another double current fuse 34 is provided with fuse wires 35 instead of the current flow 24 (fig. 3). The fuse wires are arranged in a loop form on a contact surface 23 on one side of the foot piece 30 and led by a bore 36 to another contact surface 23 placed at the same end. The fuse wires 35 are soldered to solder eyes at both ends

37 which is connected to the contact surfaces 23.

According to fig. 9, the fuse wires 35 are arranged in a straight line between the two ends on one side of the foot piece 30. The solder eyes 37 are arranged on the same side for both fuse wires 15. Even so, one of the pairs of solder eyes 37 is connected through to the other side and there connected to the opposite contact surfaces 23. As the two contact surfaces 23 are each assigned to different wiring paths at one end, the associated spring contacts 33 are also open in an unpaired state.

According to fig. 10 is another single circuit breaker 38 similar to that in fig. 5 provided with a fuse wire 35 instead of the etched current flow. This fuse can also be inserted into a box 26 (fig. 5). The box protects the actual fuse and prevents the arc from coming out or persisting for a longer time when the fuse strip burns out, as the plastic evaporates and extinguishes it.

According to fig. 11 and 12, an assembly 41 consists of an injection-moulded support part 42, contact piece r 43, current circuit breakers 44, over voltage suppressors 45, welding pieces 46 and an earthing manifold 47.

The contact piece 43 is provided along a longitudinal edge of the carrier part 42 with contact surfaces 48 for the sockets 49 of the contact springs 50 in a layer component, which is arranged in a layer distributor in a telephone exchange. The contact pieces 43 are built into the carrier part by spraying and extend mainly vertically in the row direction in the plane of the carrier part 42.

Short contact piece 43 is fork-shaped with its vertically bent free end and grips around a pole of the current fuse 44. The longer of the overlapping contact pieces 43 extends from the contact surfaces 48 and to the back of the carrier part 42, where it forms a contact zone for the fuse piece 46. On this is attached the voltage arrester 45

which with its other pole rests against a spring finger 51 in the U-shaped .jo rd ing smu 11 ippe 1 47. Next to the voltage arrester 45, a contact ear 52 punched out of the longer contact part 43 is bent up, which with its free end protrudes close to the feather edge 51 and is mainly surrounded by the carrier part 42. The bending edge lies in the longitudinal direction of the assembly 41. The contact ear 52 points before bending in the direction of the contact surface 48. From the longer contact piece 43 it is in the immediate vicinity of the contact ear 52 bent in the same way as with the contact ear 52 out a further ear in the form of a contact part 53 for the other pole of the current indicator 44. Thus the current indicator 44 provides the electrical connection between the two contact pieces 43 and thus between the two contact springs 50.

According to fig. 13, the contact part 53 for current ikr no 44 is designed as a flat fork, the material plane of which extends in the longitudinal direction of the component assembly. The small, plate-shaped current fuse 44 is clamped and contacted between two side legs of the contact part 53.

Claims (13)

1. Component assembly (1) for securing electrical cables in distributors in telecommunications, especially telephone exchanges, whereby the flat component assembly (1) with power fuses (4) arranged one behind the other as a longitudinal element can be connected to a socket (6) on a layer component in a distributor, the external wires going to the subscribers and the internal wires going to the central devices are connected to the sockets (6) connected to ten connection elements of the layer component and the elongated fuses (4) extend across the row direction of the fuses and are attached at their ends between spring legs (13) on the contact parts (3, 14), which are attached to a support part (2, 15) of the component assembly, characterized in that the current circuit (4) is made as an elongated, flat and with its longitudinal edge perpendicular to the carrier part standing small si kr mgsp 1ate, whose poles (10) are arranged in the area at its end sides, that the contact parts (3, 14) in the area of the flow rings (4) are made as flat plate parts standing vertically on the support part (2, 15) which have a middle, towards the free end, open, punched clamping slot, which separates the two spring legs (13), and that the planes for the contact parts (3, 14) extend in the row direction for the power rings (4). 2. Component assembly according to claim 1, characterized in that the contact parts (3) are designed as flat components which, with the help of a soldering iron (12), are inserted into a bore in the carrier part designed as a circuit board (2). 3. Component assembly according to claim 1, characterized by the fact that the contact part (14) is flatly built into the support part produced from injection molding and in the area of the current conductor poles (10) bent out from the support part (15) about one across these horizontal bending edge. 4. Component assembly according to claim 1, 2 or 3, characterized in that the two branches in each subscriber line are provided with a current fuse as a longitudinal element, whose contact surfaces are in contact with counter contact surfaces on the assembly, and that the two currents are ingers (21, 29, 38) in a subscriber line are mechanically joined together in a component and connected together. 5. Component assembly according to claim 4, characterized in that the two current circuits (21, 38) are inserted into a common box (26) and connected with the counter contacts. 6. Device according to claim 4, characterized in that the two current fuses in a common component are designed as a double current fuse (29) with a common plate-shaped foot part (30) and two separate fuse tracks (24, 35). 7. Component assembly according to claim 6, characterized in that the foot portion (30) has etched current channels (24) as safety paths and which connect the contact surfaces (23), and that the two current channels (24) are arranged on the same side of the foot portion ( 30 ) . 8. Component assembly according to claim 6, characterized in that the contact surfaces (23) of the current IC are connected with a fuse wire which has a wire-shaped core wound in so 1 as ion wire. 9. Component assembly according to one of the preceding claims, characterized in that the counter contact floats are designed as fork-shaped spring contacts (33) in the assembly and whose legs (32) are galvanically separated and arranged on both sides of the foot part (30), and that at least one of the safety rails by a bore (31, 36) is passed through the foot part (30). 10. Component assembly according to claim 7 or 8, characterized in that the two connected contact surfaces (23) each at the same end are arranged on both sides of the foot part (30), that the connecting line is led through a bore (31, 34 ) in the foot part (32), and that the two separate legs (32) of the fork-shaped spring contact (33) touch each other when the fuse is removed. 11. Component assembly according to one of the preceding claims, characterized in that the contact pieces (43) along a longitudinal edge of the support part (42) are provided with contact surfaces (48) for the sockets (49) of the layer component, that they are provided at their other end with contact zones lying in the plane of the support part (42) for surge arresters (45) standing with their center axes vertical to the support part and solder pieces (46) lying between them, that on the back side of the assembly facing the contact surfaces (8) there is an earthing multiple (7 ) which with spring fingers (51) rest against the poles facing away from the carrier part (42) above the voltage arrester (45), that the contact pieces (43) have a bent up part that projects close to the spring fingers (51) and that the bent up part is designed as a punched contact ear (12) which with its free end projects to the spring finger (11) and is mainly surrounded by the carrier part (2). 12. Component assembly according to claim 11, characterized in that the narrow contact ear (52) is punched out from a contact piece (43) along its longitudinal edge and that its free end before bending up points in the direction of the contact surfaces (48). 13. Component assembly according to claim 12, characterized in that the assembly (41) is provided with current fuses (44) as a longitudinal element, that one pole of the current fuses (44) is in contact with the contact piece (43) which is provided with the contact zone by means of a contact part (53) which, in the same way as the contact ear (52), is punched out of the contact piece (43) and bent up in an axis lying across the contact piece, that the contact ear (52) and the contact part (43) are punched out immediately one after the other and in the same direction from the contact piece (43), and that the contact part (53) is designed as a flat, fork-shaped plate part, which grips around the small, plate-shaped current coils (44).