DE8711970U1 - Cable termination device for optical fibers - Google Patents

Description

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Cable termination device for optical fibers '&uacgr;

']/&ggr; The innovation relates to a cable termination device &rgr;

for the recording and further processing of §

Optical fiber consisting of a in an I

Cable end frame insertable, approximately rectangular insert, I

the fine space for storing stock lengths of §

Optical fiber and several connectors for |

By connecting two optical fibers each §

(DE-GM 87 07 876) . f

Cable end frames with such cable end devices

are used, for example, at local level in optical networks^ fe

so-called overlay networks. Spatially they are |

( for example, in switching centers. In |

A cable end frame usually has several |

Cable end directions on top of each other or |

arranged next to each other. In the slots of the | cable end devices, for example,

removable brackets called splice cassettes ' are attached, in which welded
Connection points between the ends of two

Optical fiber - hereinafter referred to as "LWL" - _t

together with reserve lengths. In addition to the f

Splice cassettes are also available in the slots I

Connectors are mounted, each with two I

The fiber optic cable equipped with connector pins is plugged in and \

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The space requirement of these known installations is considerable, so that only a small number of cable end devices with a correspondingly limited number of fiber optic cables to be connected through can be accommodated in the cable end parts, the dimensions of which are predetermined.

This also applies to the known device according to the DE-GM 87 07 876 mentioned at the beginning, in which splice cassettes and connectors are arranged particularly conveniently so that the fiber optic cables can be connected very easily. This cable termination device also requires a relatively large amount of space. ■%

/\ The innovation is based on the task of creating a _K

Cable termination device for fiber optic cables whose _.

The space requirement is significantly reduced compared to known arrangements and which allows a particularly simple connection of the optical fibers.

This task is solved in a cable termination device of the type described above according to the innovation by

- that in a rectangular front panel of the plug-in unit, which is on the outside when the plug-in unit is inserted into the cable end frame, a large number of tubes penetrating the front panel are fitted as connectors, to which the optical fibres stored in the plug-in unit in stock lengths are firmly connected and

- that the ends of the tubes pointing outwards are dimensioned in such a way that the ends of connecting optical fibers can be plugged in without separate plug elements with direct contact to the optical fibers connected inside.

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t)xe tubes used as connectors can have a small diameter, since they only need to be slightly larger than the fiber optic cables that can be plugged in directly without plug-in elements. The tubes can therefore be installed very close to one another and one above the other in the front panel, so that compared to known arrangements with the same fiber optic number

or the number of fiber optic cables can be increased with the same dimensions of the front panel. In both cases, more fiber optic cables can be accommodated in the same space as in the known arrangements and

be connected through. The connection is

j particularly simple, since only connecting fiber optic cables from

must be plugged into the tubes on the outside. These connecting fiber optic cables then lead either directly to the

* Terminals located near the cable end frames or

&Idigr; another slot. It can be used to connect the fiber optics of a

" incoming external cable directly to terminal devices or to

further internal cables can be connected. "Shunting" using the connecting fiber optic cable is therefore particularly easy.

/ 'j Advantageous features of the innovation emerge from the

Subclaims emerge.

Ji$ An embodiment of the subject matter of the innovation is shown in the drawings.

Show it:

Fig. 1 and 2 Front views of two different

constructed cable end frames.

Fig. 3 is a side view of a cable end frame according to

Fig.1.

Fig. 4 a view of the front panel of a

Cable termination device after the innovation in enlarged

Depiction.

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Fig. 5 is a plan view of the cable termination device according to Fig. 4.

Fig. 6 a tube that can be used in the cable termination device in a further enlarged view*

In Fig. 1, a section of a cable termination system ■ KEG is schematically indicated, in which cable termination devices

I KEE are arranged in rows one above the other, lift

U Cable end frame KEG according to Fig. 2 are the

I KEE cable termination devices installed next to each other.

j For connecting the optical fiber of a fiber optic cable

f external cable 1, the same is extended to the vicinity of a

|, cable end frame KEG. The fiber optic cable of the external cable

I are exposed by stripping and become one of the

I cable termination equipment KEE. In the external cable 1

i' are, for example, ten optical fibres in a tube

ii , so that ten optical fibers each form a

i' Cable termination device KEE can be routed. The LWL

but can also be used for different

Cable terminal equipment KEE can also be connected to the

* &igr; ) LWL from further internal cables 2 fed in

become.

j _; Each cable terminal equipment KEE consists of a

I Fig. 4 and 5 shown, approximately rectangular insert 3,

; which can be designed as an open box and with

. connectors 4. It has a space

to accommodate stock lengths of the optical fibers 5 to be connected to the connectors 4. For this purpose, at least one circular disk 6 can be arranged in the insert, for example, around which the stock lengths of the optical fibers 5 are loosely wound. The outer diameter of the disk ' corresponds to the smallest bending radius by which the optical fibers

can be bent without risk of breakage. When pulling out

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of an insert 3, for example mounted on telescopic rails, from the cable end frame KEG, the windings of the optical fiber 5 wrap more tightly around the disk 6, reducing their diameter so that they are not damaged. When the insert 3 is pushed back into the cable end frame KEG, the diameter becomes larger again due to the elasticity of the optical fiber.

The connectors 4 are firmly attached to the front panel 7 of the insert 3. They are designed as tubes and are preferably made of glass. The tubes can also be made of metal or plastic. In their middle area, in a preferred embodiment, they have an insert 8 (Fig. 6) which serves to accommodate the cores 9 of two optical fibers, which are to be connected to one another and have been freed from a protective layer. The optical fibers 5 housed in the insert 3 are plugged into the connectors 4 and preferably fixed in place, for example by gluing.

To connect the optical fibers of the external cable 1, connecting optical fibers 10 can be used, which are inserted into the plug connectors 4 from the outside after their ends have been prepared accordingly. The connecting optical fibers 10 can be connected directly to terminal devices 11 on the other side. However, it is also possible to use the connecting optical fibers 10 to establish a connection to the optical fibers of the internal cables 2, which are also connected in slots or cable terminal devices KEE of the cable end frame KEG and lead to terminal devices further away.

Claims (1)

Ill ·· · · ■■ lit · · · · Ii &igr;&igr; > t ta·· it ti t % * ■ ■ .1 Protection claims i.. Cable termination device for receiving and Further connection of optical fibers, consisting of an approximately ( rectangular insert that can be inserted into a cable end frame, which provides a space for Storage of stock lengths of optical fiber and several connectors for Connecting two optical fibers i
identifies, characterized by , that in a rectangular front plate (7) of the j Exnschub (3), which in the cable end frame (KEG) inserted insert (3) is located outside, a plurality of tubes penetrating the front plate (7) are attached as connectors (4), to which the optical fibers (5) stored in the same in stock lengths are firmly connected inside the insert (3) and
- that the sweet-pointing ends of the Tubes are dimensioned such that the ends of connecting optical fibers (10) can be inserted without separate plug-in elements with direct contact to the internally connected optical fibers (5). 2, Cable termination according to claim 1, characterized characterized in that the connectors (4) have an insert (8) in their central area for ^receiving cores (9) of the optical fibers to be connected, which have been freed from a protective layer. 3. Cable terminating device according to claim 1 or 2, characterized in that the plug connectors (4) are designed as glass tubes. 4. Cable termination device according to one of claims 1 to 3, characterized in that at least one circular disk (6) is mounted in the insert (3) for winding up the supply lengths of the optical waveguides (5).