JPS60170808A - Simple optical connector - Google Patents

Abstract

PURPOSE:To obtain an inexpensive optical connector which is assembled easily and treated in a short time by employing caulking structure for the connection between and holding of a ferrule and the core of an optical fiber cord and the holding and fixation of the ferrule and optical fiber cord. CONSTITUTION:The fiber cord 3 having a terminal worked to specific size previously is inserted into the ferrule 1 and its core 5 is fixed by being caulked at 1-2 points of the part A of a core crimping part. Thus, the fiber core 5 and fiber element wire 6 are fixed in the ferrule 1 by the caulking work. Similarly, the ferrule 1 and a pipe 2, and the fiber cord 3 and pipe 2 are fixed by caulking at parts B and C. A tension member 4, on the other hand, is fixed to the ferrule 1 with the caulked part of the part B. Further, the fiber element wire 6 and ferrule 1 are fixed with a rapid cure adhesive at the part D atop the ferrule 1. Thus, the inexpensive optical connector is assembled easily and treated in a short time.

Description

Detailed Description of the Invention The present invention relates to the structure of an optical coil lid used for optical connection between optical fibers or between optical fibers and other optical devices, and is a simple optical connector that is inexpensive and easy to assemble. It provides:

In general, when assembling an optical connector and a fiber cord, various adhesives are used to fix the fiber and the ferrule, which are their constituent parts. On the other hand, as the development and practical application of optical transmission systems progresses, there is a demand for optical connectors that are inexpensive and can be assembled in a short time.

Therefore, studies are being conducted to simplify the structure of the connector and shorten the adhesive curing time during assembly. Furthermore, in assembling the optical connector and the fiber cord, it is necessary to securely fix the ferrule and the fiber cord strand, and the ferrule and the fiber cord outer sheath.

In the conventional ferrule and fiber-to-fiber CD fixing method using an adhesive, the fiber cord wire is coated with a silicone resin that prevents adhesion, so it is necessary to remove this silicone resin before bonding. On the other hand, during bonding work, the trap requires a long curing time because the adhesive sticks, and it has the disadvantage that it cannot be used even if it is necessary to perform processing in a short time during on-site construction. Furthermore, there is a drawback that problems are likely to occur due to a decrease in adhesive strength due to variations in work in the bonding work. Furthermore, peeling off the silicone resin and using silkworm cloth for the adhesive required considerable skill and were labor-intensive operations.

SUMMARY OF THE INVENTION An object of the present invention is to provide an inexpensive optical connector that eliminates the above-mentioned drawbacks and can be easily assembled and processed in a short time.

The gist of the present invention is to use a caulking structure to connect and hold the ferrule and the core wire of the optical fiber cord, and to hold and fix the ferrule and the outer skin of the optical fiber cord, and the optical fiber cord is attached to the tip. It has a small-diameter hole into which a strand of fiber can be inserted and fixed, and the other end has a core crimping part into which the core wire of an optical fiber cord can be inserted and which can be crimped. It is composed of a ferrule having a reinforcing member caulking portion having a diameter, and a pipe having one end caulked to the optical fiber cord and the other end fitted to the reinforcing member caulking portion of the ferrule, The reinforcing member exposed from the ferrule is caulked and fixed to the crimp portion of the reinforcing portion of the ferrule using the pipe.

According to the structure according to the present invention, by using a caulking tool to caulk the parts between each component by an appropriate amount, it is possible to securely hold and fix the parts, and the process can be done in a short time. Also, by using tools, assembly can be easily done without requiring any skill.

Embodiments of the present invention will be described below with reference to the drawings.

The drawing is a longitudinal sectional view of a simple connector according to an embodiment of the present invention. The optical fiber cord 3 has a core wire 5 in its center, a tension member (reinforcing member) 4 is arranged around the core, and the outside thereof is covered with an outer sheath. A fiber wire 6 passes through the center of the core wire. A small diameter hole is formed in the ferrule 1 into which the strand 6 of the optical fiber cord can be inserted, and a core crimping part is formed at one end 111j into which the core wire 5 can be inserted and fixed by caulking. A caulking portion for holding and caulking the tension member is provided on the outer side. As will be described later, a pipe 2 is similarly fixed to the outer periphery of the connecting portion between the ferrule L and the cord 3 by caulking.

In such a (11η configuration), first, a fiber cord 3 whose end is pre-processed to a predetermined size is inserted into the ferrule 1, and the core wire 5 is crimped at 1 to 2 locations in the A section of the core wire crimping part. This caulking fixes the ferrule 1, the fiber core 15, and the fiber strand 6. Similarly, part B.

At part 0, the ferrule 1 and the pipe 2, and the fiber cord 3 and the pipe 2 are each caulked and fixed. On the other hand, the tension member 41d-B is fixed to the ferrule 1 through the pipe 2V'C at the caulked portion. Furthermore, at the edge of the ferrule 1, the fiber wire 6 and the ferrule 1 are fixed with a quick-drying adhesive.

According to the present invention, compared to conventional fixed structure products using adhesives, processing of silicone resin in terminal processing can be simplified, waiting time for adhesive curing can be shortened to a large IJ, and the structure The number of parts can be reduced and the number of parts can be reduced, and low-cost optical connectors can be supplied in a row.

[Brief explanation of drawings]

The drawing is a schematic cross-sectional view of one embodiment of a simple optical connector according to the present invention. ■... Ferrule, 2... Pipe, 3... Optical fiber cord, 4... Tension member, 5... Core wire, 6... Plain wire. Agent Patent Attorney Rikichi Somekawa

Claims (1)

[Claims] The tip has a small diameter large enough to allow insertion and fixation of the strands of the optical fiber cord, and the other end has a core wire crimping part into which the core wire of the optical fiber cord can be inserted and can be crimped. It is composed of a ferrule equipped with a reinforcing member caulked portion having an outer diameter larger than the outer diameter, and a pipe whose one end is caulked to the Hikari 7 Eye Paccord and the other end is fitted to the reinforcing member caulked portion of the ferrule, A simple optical connector characterized in that a reinforcing member exposed from an end of an optical fiber cord is crimped and fixed to a reinforcing member crimped portion of the ferrule by the pipe.