Classifications

• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
  • G02B6/24—Coupling light guides
  • G02B6/36—Mechanical coupling means
  • G02B6/38—Mechanical coupling means having fibre to fibre mating means
  • G02B6/3807—Dismountable connectors, i.e. comprising plugs
  • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
  • G02B6/3855—Details of mounting fibres in ferrules; Assembly methods; Manufacture characterised by the method of anchoring or fixing the fibre within the ferrule
  • G02B6/3857—Crimping, i.e. involving plastic deformation
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
  • G02B6/24—Coupling light guides
  • G02B6/36—Mechanical coupling means
  • G02B6/38—Mechanical coupling means having fibre to fibre mating means
  • G02B6/3807—Dismountable connectors, i.e. comprising plugs
  • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
  • G02B6/3855—Details of mounting fibres in ferrules; Assembly methods; Manufacture characterised by the method of anchoring or fixing the fibre within the ferrule
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
  • G02B6/24—Coupling light guides
  • G02B6/36—Mechanical coupling means
  • G02B6/38—Mechanical coupling means having fibre to fibre mating means
  • G02B6/3807—Dismountable connectors, i.e. comprising plugs
  • G02B6/3887—Anchoring optical cables to connector housings, e.g. strain relief features
  • G02B6/3888—Protection from over-extension or over-compression
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
  • G02B6/24—Coupling light guides
  • G02B6/36—Mechanical coupling means
  • G02B6/38—Mechanical coupling means having fibre to fibre mating means
  • G02B6/3807—Dismountable connectors, i.e. comprising plugs
  • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
  • G02B6/3865—Details of mounting fibres in ferrules; Assembly methods; Manufacture fabricated by using moulding techniques

Definitions

• the present invention relates to a fiber optic cable assembly according to the preamble of claim 1.
• Such an arrangement is known for example from DE 44 10 444.
• Such fiber optic connectors are required to connect fiber optic cables to devices in which light signals are converted, amplified, forwarded or processed.
• LWL plugs are required in large numbers in systems which work with light signals, so that a reduction in the cost of producing such plugs has a major influence on the overall costs of such a system.
• Fiber optic plugs must not take up too much space so that a large number of plugs can be arranged in the smallest space. Furthermore, they must be robustly designed for frequent plug-in and tensile loads and guarantee high pull-out forces. It is when transmitting signals It is important that the losses at the cable end / device interface are kept as small as possible. It is important that the end face of the fiber optic cable is flat and free of damage such as scratches, cracks, etc.
• the plug-cable arrangement should be suitable for automatic assembly and for manual assembly. In addition, the manufacture can be accelerated and made cheaper if injection molds can be used from which the injection molded part can be removed quickly and easily.
• the present invention has for its object to improve a generic fiber optic cable assembly so that it is cheaper and quicker to manufacture and is suitable for both automatic and manual assembly. This task is solved according to the requirements.
• the fiber optic connector cable arrangement uses cables which have an outer and an inner protective sheath.
• the outer protective sheath is separated at the end of the cable.
• Both sleeves are firmly connected to the connector by crimping.
• the projections, which are pressed into the cable sleeves have a flat profile, which, together with a slightly conical opening towards the cable end, enables the plug to be pressed out of its injection mold by a simple translational movement of a press die.
• This also contributes to the fact that the sawtooth profiles are not located on the entire inner wall of the plug, but only on narrow axial sections, four of which are arranged at an angular distance of 90 ° according to a preferred embodiment. Seen radially just above these sawtooth profiles are on the outside of the connector for the engagement of crimping teeth Genbacken specially shaped surfaces that allow a precise crimping of the connector on the fiber optic cable end.
• Figure 1 shows the optical fiber cable used in the arrangement according to the invention in cross section.
• Figure 2 is a longitudinal sectional perspective view of the connector used in the arrangement according to the invention.
• FIG. 3 shows the connector according to FIG. 2 in longitudinal section
• FIG. 4 shows the plug according to FIG. 2 with the optical fiber cable inserted and crimped
• Fig. ⁇ ' is a perspective view of the fiber optic connector cable assembly according to the invention.
• the cable 1 shows a cable 4 used in the optical waveguide / plug / cable arrangement according to the invention. It consists of an outer shell 6 made of a suitable PA plastic from the outside inwards, which is usually colored to identify the cables. This cover 6 envelops an inner protective cover 7, which in turn sits on the polymer fiber 9 provided with a protective cover 8.
• the fiber 9 is a plastic fiber made of a polymer, which is particularly suitable for high data transmission rates with a transmission length of less than 100 m.
• the cable has an outer diameter of 2.3 mm with a core diameter of 980 ⁇ m.
• Fig. 2 shows a longitudinal section through a perspective view of the connector used in the arrangement according to the invention.
• the plug housing 1 has a plug segment 2 and a clamping segment 3 for fastening the fiber optic cable 4.
• the clamping segment 3 is again in turn divided into a plug-in area 3a with a reduced inside diameter and a cable-side segment 3b.
• the inner diameters of the segments 3a and 3b are selected so that the plug can be crimped in the plug segment 3a on the inner cable sheath 7 and crimped on the outer sheath 6 in the cable-side clamping segment 3b.
• both clamping segments 3a, 3b axially extending partial areas 10 with projections are attached to the inner wall of the connector housing. These are separated from one another in the radial direction by smooth wall areas, against which the projections 5 project inwards.
• four regions 10 with projections 5 are each radially spaced from one another by 90 ° in the clamping segments 3a, 3b.
• the partial areas 10 with the crimp profiles 5 on the inside of the tubular connector housing are arranged on the outside of them exactly opposite surfaces 11 for the application of crimping pliers jaws.
• the projections 5 have a flattened sawtooth profile in the partial regions 10, 2 Lr at least the flanks of the projections 5 on the cable end making an angle of less than 45 ° with respect to the longitudinal axis of the plug housing 1.
• the flanks on the end face can be steeper, extending perpendicular to the cable axis.
• the entire clamping area is slightly conically opening towards the cable side.
• the public angle is about 2 °.
• Fig. 3 shows the connector housing 1 in cross section, the flat sawtooth profile in the areas 3a and 3b and their angular spacing are clearly recognizable.
• Fig. 4 shows a longitudinal view, partly cut in the longitudinal direction and each in cross section of the optical fiber connector cable assembly according to the invention.
• the section below right shows that the inner shell 7 and the front end of the fiber 9 end at a short distance from the plug end of the plug segment 2, so that the fiber in front Scratch is protected.
• the outer diameter of the plug housing in the area of the clamping segments 3a and 3b are designed such that the wall thickness is essentially the same in both cases, so that the deformation forces required for crimping are approximately the same.
• FIG. 5 shows the fiber optic connector cable arrangement according to the invention in perspective.
• the description of this exemplary embodiment of the invention serves only for illustration and is not to be understood as restrictive.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Mechanical Coupling Of Light Guides (AREA)
• Details Of Connecting Devices For Male And Female Coupling (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=28684897

Family Applications (1)

Country Status (7)

Families Citing this family (8)

Family Cites Families (8)

• 2002
  • 2002-04-10 DE DE10215735A patent/DE10215735B4/de not_active Expired - Fee Related
• 2003
  • 2003-04-09 US US10/510,909 patent/US20050226589A1/en not_active Abandoned
  • 2003-04-09 AU AU2003226792A patent/AU2003226792A1/en not_active Abandoned
  • 2003-04-09 EP EP03745797A patent/EP1493053A1/de not_active Withdrawn
  • 2003-04-09 CN CN03808139.3A patent/CN1646961A/zh active Pending
  • 2003-04-09 WO PCT/EP2003/003688 patent/WO2003085434A1/de active Application Filing
  • 2003-04-09 JP JP2003582566A patent/JP2005522716A/ja active Pending

Non-Patent Citations (1)

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