JPS5921367Y2 - Optical fiber connector terminal structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical connector terminal structure used to connect optical fibers to each other or to connect optical fibers to an optical device.

The connection between optical fibers is different from the connection between conventional electric cables, and the quality of the connection is determined by the butting position accuracy (axis deviation accuracy, tilt accuracy), etc. of the fibers that are connected to each other.

In order to maintain this matching position accuracy, the position accuracy of the optical fiber of the terminal, the precision of the alignment mechanism for aligning the terminals, and strong fastening and fixing are required.

In addition, considering ease of handling, it is necessary that the terminal and the terminal receiver be provided with a simple attachment/detachment mechanism.

This simple attachment/detachment mechanism includes a structure that uses a male thread and a female thread to fit together, a structure that uses a protrusion and a step to fit, a structure that uses a hole and a pin to fit, and a structure that uses a direct plug-in fit. There are many different structures depending on the

In this way, in conventional terminal structures, there are many types of fastening and fixing mechanisms for optical connectors, so when connecting different types of fastening and fixing mechanisms for optical connectors, it is necessary to prepare a receiving part that can be fitted each time. It's extremely inconvenient.

The purpose of this invention is to adopt a simple configuration in which a coupling nut with a thread formed on the outer periphery is placed on the outside of a cylindrical terminal member in which an optical fiber is fixed on the central axis, thereby making it possible to easily form various terminals. The purpose of the present invention is to provide a terminal structure of an optical connector with rich characteristics.

Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a sectional view showing a conventional terminal structure.

In the figure, an optical fiber 1 is inserted into the inner hole of a terminal cylindrical member 2 having an inner hole slightly larger than its outer diameter, and after being fixed, its end surface is polished smooth, and the optical fiber 1 is
The outer periphery of the end cylindrical member 2 is cut around the core, so that the center of the core of the optical fiber 1 and the center of the outer periphery of the end cylindrical member 2 are aligned.

The structure shown in FIG. 1 includes a terminal cylindrical member 2 with an optical fiber 1 fixed at the center and a flange-shaped collar provided at the rear, and an inner diameter larger than the outer diameter of the terminal cylindrical member 2 and smaller than the flange-shaped collar. Moreover, a stopper 4 having a cylindrical shape and capable of storing the elastic body 5 between the elastic body 5 that can act in the axial direction of the optical fiber 1 and the collar of the terminal cylindrical member 2 and having a thread formed on its outer periphery. and a guide member 3 formed with a thread that can be fitted with the thread of this stopper 4 and having a flange-like collar on its outer periphery.

Further, around the guide member 3, a knob 6 having a screw formed thereon that can be fastened and fixed to the end part as a means for fastening and fixing the end part to the part (not shown) is arranged as shown by the dotted line. There is.

Here, a screw fitting structure is shown as the fastening and fixing means, but as described above, there are various known fastening means such as a structure using a fitting between a protrusion and a step, a plug-in structure, etc.

As is clear from FIG. 1, in order to change this fastening structure to the above-mentioned plug-in structure etc., it is done by releasing the screw fitting between the guide member 3 and the stopper 4.
At this time, due to the release of the screw fitting, the elastic body 5 is stretched and a tensile force is applied to the optical fiber 1, which may cause damage to the optical fiber 1.

In the structure of the terminal of the present invention, the precision-machined guide member 3 as described above is removed, and the coupling nut 7 with a thread formed on the outer periphery is placed outside the terminal cylindrical member 2, so that various fastening and fixing means can be easily used. It is possible to form a terminal compatible with

FIG. 2 shows a sectional view of an embodiment of the terminal structure of the present invention.

In this embodiment, the optical fiber 1 is fixed on the central axis, and the terminal cylindrical member 2 has a flange-like collar near the rear, and the inner diameter is larger than the outer diameter of the terminal cylindrical member 2 and operates in the axial direction of the optical fiber 1. a coupling nut 7 having a screw 9 formed at the tip of its outer periphery and having a part of the inner diameter near the rear part larger than the outer diameter of the terminal member and another part larger than the outer diameter of the elastic body; It is composed of a retaining ring 8 having an outer diameter larger than the inner diameter of the elastic body 5, and a fastening and fixing mechanism 24 having a screw that fits into the coupling nut 7.

FIGS. 3 and 4 each show an example of an exterior body that fits with the screw 9 of the coupling nut 7, that is, a fastening and fixing mechanism 24.

In the structure shown in FIG. 3, a collar 14 having a screw 10 that fits into the coupling nut 7 and a knob 11 having a screw 13 formed at the tip and having an inner diameter larger than the outer diameter of the collar 14 are fixed by a clip 12. has been done.

In FIG. 4, the housing 15 has a screw 10 on its inner wall that engages with the coupling nut 7, and a knob 11 of the fastening and fixing mechanism shown in FIG. It has a screw 16 that fits with the screw 13 of.

Further, the housing 15 houses an alignment sleeve 17 (filed in Utility Model Application No. 53-122553) therein, and has a stopper 18 to prevent the alignment sleeve 17 from being pulled out.

As described above, a coupling nut with a thread formed on the outer periphery is placed outside the terminal cylindrical member to which the optical fiber is fixed, and is replaced with an exterior body having various connection and fixing means with threads that can fit with the threads of the nut. By doing so, it is possible to obtain an optical connector having various fastening and fixing means.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the structure of a conventional terminal, Fig. 2 is a sectional view showing an embodiment of the present invention, and Fig. 3 is an example of an exterior part formed with a screw to be fitted with the terminal of the present invention. and the fourth
The figure is a diagram showing a terminal part of the present invention, which is formed with a screw to be fitted with the terminal and has an alignment mechanism built therein. In FIGS. 1 to 4, 1...optical fiber,
2... End cylindrical member, 3... Guide member, 4... Stopper, 5... Elastic body, 6
...Knob, 7...Coupling nut, 8...Retaining ring, 9...Screw, 10
...Screw that can be fitted with 9, 11...Knob, 12...Clip, 13...Screw that can be fitted with terminal part, 14...Color,
15...Alignment sleeve exterior body, 16...
・Screw that can be fitted with 13, 17... Alignment sleeve, 18... Stopper.

Claims (3)

[Scope of utility model registration request] (1) A terminal cylindrical member in which the optical fiber is positioned with high precision on the central axis, a retaining ring provided on the outer periphery of the terminal cylindrical member, and a screw formed on the outer periphery of the terminal cylindrical member. a basic plug formed of a coupling nut with a fixed ring, an elastic body installed between the retaining ring and the coupling nut and pressing the terminal cylindrical member in the axial direction, and a thread of the coupling nut of the basic plug. 1. An optical fiber connector terminal structure comprising: and a fastening and fixing means having a screw that fits into the terminal structure. (2) In the optical fiber connector terminal structure, the fastening and fixing means includes a collar having a screw formed on the inner surface that engages with a coupling nut screw of the basic plug, and a collar attached to the collar and having one end attached to another optical fiber connector. The optical fiber according to claim 1, characterized in that the optical fiber comprises a knob having a locking mechanism with a terminal, and a clip that locks the collar and the knob so that they rotate with each other. Connector terminal structure. (3) In the optical fiber connector terminal structure, the fastening and fixing means has an alignment sleeve for aligning and holding the terminal cylindrical member, and an inner hole containing the alignment sleeve, and is connected to the screw of the coupling nut of the basic plug. 2. The optical fiber connector terminal structure according to claim 1, further comprising an alignment sleeve outer body having a screw to be fitted on the same axis as the inner hole.