The invention relates to a terminal head for telecommunication and data engineering.
In existing copper telecommunication networks, the access network is constructed as radial network in most cases. In this network configuration, the main cables are brought out of the switching office and distributed to the various cable distributors of the corresponding subscriber regions. The main cable is distributed to the various cable distributors via cable sleeves. From the cable sleeves, the distributed main cables then go to the cable distributors where they are connected to terminal heads and are run as distribution cables in the respective streets of the subscribers. The connection to the terminal distribution box of the subscriber is then made in most cases by means of a sleeve in the distribution cable. Due to this fanning out of the network towards the subscriber, the connection of the main cables at the subscriber or line side at the main distributor is the only location in the access network where all connections (lines) run together in space and can be centrally tested. The number of terminal heads in a cable distributor is dependent on the type of construction of the cable distributor, but a typical value is about 12 terminal heads per cable distributor.
A terminal head consists, for example, of a mounting or receiving shell for 10 terminal strips which, in turn can in each case connect 10 pairs. Thus, 100 pairs can be connected by means of one terminal head. The receiving shell is then preferably hooked into the cable distributor rack with preassembled clamping nuts, and the clamping nuts then snap in behind the rack rails. The receiving shell is then clamped by tightening fitting screws and a ground connection is made.
The rack rails can be dimensioned in length in such a manner that a number of terminal heads can snap in (for example three), or can be designed for only one terminal head.
From DE 10 2004 017 605 A1, a connector for circuit boards is known comprising a number of contact elements, the contact elements in each case having two connecting sides, one connecting side being constructed as insulation displacement contact for connecting wires and the other connecting side being constructed as forked contact for contacting terminal areas on the circuit board.
The invention is based on the technical problem of creating a terminal head which has a higher terminal density.
The solution of the technical problem is obtained through the subject matter having the features of claim 1. Further advantageous embodiments of the invention are obtained from the subclaims.
For this purpose, the terminal head for telecommunication and data engineering comprises a housing in which terminal strips are arranged for interconnecting a predetermined number of pairs, the housing being constructed with attachment means by means of which the housing can be attached to carriers, the terminal strips being constructed as circuit board connectors, characterized in that in the housing, a number of circuit boards are arranged which are accessible from the front and the rear of the housing, characterized in that the circuit board connectors are plugged onto the circuit board from the front of the housing and are plugged onto the circuit boards from the rear of the housing, characterized in that conductor runs are arranged on the circuit boards via which in each case one contact of a circuit board connector of the front is connected to a contact of a circuit board connector of the rear via the in each case common circuit board. This makes it possible to considerably increase the terminal density since the distributed main cable is connected at the rear of the housing, whereas the entire front is available for connecting the jumper wires, characterized in that the number of terminals can be doubled per row, that is to say 20 pairs, for example, can now be connected per row instead of previously 10 pairs. This makes it possible to halve the constructional height, an increase in width being uncritical as long as the terminal head fits between the existing carriers since a terminal head with 100 pairs now only needs five rows instead of previously ten rows. The carriers are preferably of metal. The circuit board connector preferably comprises a number of contact elements, the contact elements in each case having two terminal sides, characterized in that one terminal side is constructed as insulation displacement contact for connecting wires and the other terminal side is constructed as forked contact for contacting terminal areas on the circuit board, reference being made expressly to DE 10 2004 017 605 A1 with respect to the actual construction.
In a preferred embodiment, the housing has a detachable rear wall. Before the rear wall is mounted, the circuit boards can then be pushed into the housing where they are guided and supported. After the rear wall has been attached, they are then arranged captively in the housing. By detaching the rear wall, defective circuit boards can then be exchanged or the terminal head can be equipped with other circuit boards which, for example, have overvoltage protection elements or filter circuits such as splitters.
In a further preferred embodiment, a lug for attaching a cable is arranged at the rear wall which also preferably has a leg which is arranged centrally over the entire height at the rear wall and is used for attaching wire groups.
In a further preferred embodiment, the housing is constructed to be stepped, the housing being wider at the rear than at the front.
In a further preferred embodiment, the housing is of metal or metalized. Apart from great stability, a metal housing has good EMC and can also be used for a ground connection. In principle, the housing can also consist of plastic, however.
In a further preferred embodiment, onto each circuit board, two circuit board connectors are plugged from the front and two circuit board connectors are plugged from the rear, the distance between the circuit board connectors of the rear being greater. In this arrangement, there is preferably an unambiguous correlation between a circuit board connector of the front to a circuit board connector of the rear so that the conductor runs on the circuit board are run without cross-overs from the front to the rear of the circuit board or a deliberate antiphase crosstalk is created by crossing conductor runs in order to reduce the crosstalk between the adjacent pairs or capacitive asymmetries caused by the circuit board connectors due to capacitive couplings between the layers of a multi-layer board are compensated for. With regard to the individual circuit board connectors, it must be noted that constructional forms are conceivable where only a single circuit board connector for, for example, 20 pairs is arranged at the front whereas two circuit board connectors with 10 pairs each are arranged at the rear. Other embodiments are also conceivable. Furthermore, a constructional form is also to be protected expressly where each row has exactly one circuit board connector at the front and one circuit board connector at the rear.
In a further preferred embodiment, guides for the jumper wires are arranged in each case at the front conductor walls or the front part pieces of the side parts.
In a further preferred embodiment, the circuit board connectors of the rear and/or of the front are constructed with interfaces for an arrester magazine. The interface can be constructed, for example, as break contact or as forked contact. The arrester magazines are preferably inserted from the rear so that the patching is not impeded.
In a further preferred embodiment, on the top part and/or the bottom part of the housing, pivotable levers are arranged by means of which the terminal head can be attached to carriers. As result, the clamping nuts can be omitted so that the full width of the housing is available for the circuit board connectors.
In a further preferred embodiment, two pivotable levers are arranged in each case on the top part and the bottom part of the housing which results in greater and more uniform attachment.
In a further preferred embodiment, the levers have an excentric bend at which a hook-shaped element is arranged.
In a further preferred embodiment, the housing is constructed with stopping means for the levers.
In the text which follows, the invention will be explained in greater detail with reference to a preferred exemplary embodiment. The figures show in:
To equip the housing 10, five circuits boards 70 are inserted into the housing 10 from the rear, the circuit boards 70 in each case being guided between two roundings 25 on the left-hand and right-hand side part 14. Following this, the rear wall 15 is screwed on, the punched cutouts 24 forming stops for the rear wall 15 so that it is prevented that the rear wall 15 is pushed inward when the circuit boards are equipped with the circuit board connectors 50, and in each case ten circuit board connectors 50 are inserted on the circuit boards from the front and the rear of the housing 10. In this arrangement, the circuit board connectors 50 of the front are scarcely spaced apart whereas the circuit board connectors 50 of a row of the rear are separated by the leg 37 which why the housing 10 is also wider at the rear than at the front. So that the circuit board connectors 50 can pass the circuit boards 70 with their housing edges, they have cut-ins 74, 77, 78 (see
Each circuit board connector 50 can terminate ten pairs so that 100 pairs can be connected at the front and 100 pairs can be connected at the rear, that is to say a total of 200 pairs. However, the constructional height of the terminal head 1 is only half as high as that of a conventional terminal head. Since the terminal head 1 only covers less than one half of the width of the carrier, a further terminal head 1 can be easily arranged on the left and on the right so that, as a result, the terminal density is doubled. The correlation between the contacts of the circuit board connectors from the front to the rear is such that in each case one circuit board connector 50 of the front is connected to the circuit board connector 50 of the rear which is almost exactly opposite to it (almost because of the offset due to the leg 37), the almost opposite contacts in each case being connected to one another.
1 Terminal head
10 Housing
11 Top part
12 Bottom part
13 Front part
14 Side part
15 Rear wall
16 Metal rails
17 Slots
18 Lugs
19 Levers
20 Openings
21 First part piece
22 Second part piece
23 Third part piece
24 Bent cutout
25 Roundings
26 Lug
27 Opening
28 Lug
29 Openings
30 Rotating bearing
31 Wire guides
32 Finger
33 Bend
34 Plate
35 Slots
36 Lug
37-39 Leg
40 Riveted connections
41 Screw
42 Nuts
43 Hole
44 Protruding part (top part)
45 Protruding part (bottom part)
50 Circuit board connector
51 Side walls
52 Arrester magazine
53 Forked contact
54 Label frame
60 Carrier
61 Opening
62 Bend
63 Hook-shaped element
64 Inside edge
65 Leg
70 Circuit board
71 Front face
72 Contact pad
73 Contact pad
74 Cut-in
75 Contact pad
76 Contact pad
77 Cut-in
78 Cut-in
79 Edge
80 Edge
81 Top
Number | Date | Country | Kind |
---|---|---|---|
10 2007 032 579.9 | Jul 2007 | DE | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
---|---|---|---|---|
PCT/EP2008/005071 | 6/24/2008 | WO | 00 | 1/8/2010 |