JPS58118614A - Manufacture of multicored optical connector and its core - Google Patents

Abstract

PURPOSE:To obtain a connector of a simple structure which can accurately and easily connect plural optical fibers with each other, by providing plural fine holes which can pass optical fiber strands and core cable passing holes connected to the fine holes, and forming a core having a groove for positioning. CONSTITUTION:The cover at the end part of a multicored optical cable is removed, and a fiber strand 1a is exposed. A cable core 1 is inserted into the cable core passing hole 7 of a core 2 made of plastics, and a part of the strand 1a is projected from the front end face 14 of the core 2 through a fine hole 6, and then, the core 2 is fixed with an adhesive. Then, the front end face 14 of the core 2 is polished and the end face of the strand 1a is finished to a highly pricise plane. A pair of such cores 2 are inserted into a receptacle 3 from its both sides by fitting a projection for positioning 10 to a positioning groove 8 and the front end faces 14 of the cores 2 are butted to each other. In this way, strands 1a of the multi-cored optical cable can be connected accurately and easily in one lot.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-core optical connector that connects a plurality of original fibers together, and a method for manufacturing the core thereof. Conventionally, as a method of fixing the connecting end of the original fiber when connecting it with a connector, there has been a conventional
There is a method for manufacturing an original fiber connector terminal disclosed in Publication No. 5. As shown in FIG.
Insert the melted tree shield 1 into the gold plate 101 in this state.
04 It is a method to manufacture original fiber connector terminals by pouring and rectifying it. By butting the terminals obtained by this method against each other, the ta between the original fibers is made. However, this method In this method, insertion into the Ichinoseki between Hikari 7 Eyepa 1030 spheres 102 is technically far apart and requires a long time, so it lacks mass productivity and also requires a heater for melting gold WIOI and Tachibana Wt baths. However, as a single-core connector for connecting a pair of original fibers, it is not suitable for on-site work, and it takes time to harden the fibers. There are some as disclosed in As shown in FIG.
Hikari 7 Eyepa 103 element is placed in the core 1070i1 marked small hole 106, which is provided without eccentricity of 06! Insert 105,
The cores 107 are inserted into the sleeve 1G& to connect the optical fibers 103111j±. This connector has the advantages of being easy to assemble on-site and allowing for highly reliable connections, so it is thought that it could be used as a multi-core optical connector (Part 31).

As shown in φ) and ψ), cores 109 are attached to the ends of each fiber of the multi-core optical cable to be connected, and these cores 109 are inserted into the holder 112 by means of the wires 110 and pipes 111. hold the plug 11
3tll consists of this plug 113k receptacle 11
It has been proposed that the fibers be inserted into the sleeve 115 of No. 4 from both sides and coupled to the original fibers.
However, this connector has a large number of parts.
There are disadvantages in that the structure is complicated and the case is large. As mentioned above, the conventional connector for connecting multi-core optical cables has various disadvantages.

The present invention was made in view of these central circumstances.
It is an object of the present invention to provide a multi-core optical connector which can easily connect a plurality of original fibers together with good n-degrees and has a simple structure.

In order to achieve the above object 'ft, the JM principle of the present invention is to connect a plurality of microscopic fibers passing through the original fiber cable m' and a core wire magician connected to them by drilling one hole from the tip of the ysvc to the outside. A pair of cores having a positioning S parallel to the axial direction on the 1411 plane, and a cylindrical core having a positioning protrusion on the inner surface that fits into a positioning groove for positioning the scissors. A multi-core optical connector consisting of a receptacle in which positioning #I of each core is fitted into a protrusion for alignment and accommodates both cores against each other, and a holder for fixing and holding each core assembly to the receptacle; Cavity OJ & surface side P party fiber A bottle with a medium thick diameter from the bulk edge The entire chamber consisting of a rod with a rod is filled with molten plastic, and as it hardens, it becomes the original fiber material! It consists in a method of molding a core that is connected to a small hole to be inserted and a core wire insertion through which a core wire is passed. 'cF,
The button manufacturing method will be explained in Masaaki 17A based on the embodiment shown in the drawings. Figures 114-) and 1) show the longitudinal and transverse directions of the connector according to one embodiment. It is used to connect optical fiber cables together.Multiple original fiber cores at the terminals of multi-core optical cables to be connected! A pair of cores (plugs) 2 that collectively hold the cores 11, a receptacle 3 that accommodates these cores 2 coaxially butt against each other, and a holder 4 that holds each core 2t in the receptacle 3. It consists of.

As shown in FIG.
Part molecule of ll a: In addition to providing a plurality of micro figures 6 to pass through,
Core layer insertion that passes through the original fiber core ialom: JK person 7T-
At least one alignment tie 8t is connected to each microman 6 and extends parallel to the axial direction of the main body 60 to the rear end, while at least one positioning tie 8t is provided on the outside of the main body 5 in the axial direction from the leading edge of the main body 5. The receptacle 3 is provided in parallel with the outside diameter of the core 20 and the outer diameter of the core 20 and the outer diameter of the main body 5. It has a cylindrical shape having a t-shape, and on its inner peripheral surface there are provided alignment protrusions 10 parallel to the axial direction to fit with the alignment #18 of the core 2, and on the outer periphery of both ends. Each is provided with a male thread 11 for screwing the holder 4. The holder 4 has a cylindrical shape, and the inside of the tip
Ii blood is formed with a female threaded part 12 that is screwed together with the male thread sll of the receptacle 3, and has an annular part #i that comes into contact with the locking part 9 of the core 20 at the rear end in the inner circumferential direction. A bell I'll be provided. These receptacles 3
The holder 4 is also molded from plastic.

K connects the multi-fiber cables using this multi-fiber optical connector.As a semi-ceramic process, the cable jacket at the end of the connecting tab of the multi-fiber optical cable is stripped off and the original fiber cores are connected.
11'T - Strip the core 1 by itself, and then peel off the coating at the tip of the core 1 to a predetermined length longer than the length of the small hole 6 of the core 2 to expose the original fiber core 111a. Insert each original fiber core m11k into each core insertion hole 7 of the core 2, pass through the mail part tube part sVt at the tip, and bring it out from the tip -14 of the hazy cough core 2. In this state, each fiber core 1 is fixed to the core 2 by adhesive or the like injected into the core insertion hole 7. After this, the tip of the core 2 is 11&n
14Fi polishing, and the end face #i of Jl[1a is made into a highly accurate plane.

After attaching the cores 2t to the ends of the multi-core optical cables to be connected as described above, insert these cores 2 into the receptacle 3 from both sides, aligning them with the alignment protrusions 10. , Tips IN[i14 are butted against each other・The alignment #8 and the alignment protrusion 1
By fitting with G, the cores 2 are aligned with each other and one rotation is prevented, so that the elements 11 of both multi-core optical cables are
i11 A are butted against each other exactly on the same axis. c o After that, from the rear side of each core 2, screw the female threaded part 12t of the holder 4 into the male thread ill at the end of the socket holder 3, and screw the S part of the holder 4. 131i Fix the 1 core 2 to the receptacle 3 by making it come into contact with the locking part 9 of the core 2. When the holder 4 #l is attached to the end of the multi-core optical cable with the core 2t, Pass it through the multi-core optical cable 0 JII5 Figure 1) shows the core used in the connector used for connecting the flat multi-core optical cable.
None, 7 are arranged in parallel in the 6-position insertion connected to the microman), and similarly to the core 2 mentioned earlier, it is locked on the outer peripheral surface i! 91. Although this core does not rotate, it is necessary to ensure that the front and back cannot be heard, so a positioning groove 8' is provided for this purpose.

The receptacle that accommodates this core has a cylindrical shape with a hole having the same cross-sectional shape as the core we sell, and a positioning protrusion that fits with the positioning II #8' is provided on the inner surface of the receptacle. Note that the outer shape of the receptacle may be flat, but if a screw connection is used as a means for connecting with the holder, it is better to have a cylindrical shape.

Figure 6-), ←) and Figure 7 ←), ←), den) show the entire transport (core lid) for making the core 2 shown in Figure 5. This total transport 15 A cylindrical gear 18 is formed at the bottom 17 from 16 and 17 (for convenience, one is called the upper plate and the other the lower area), and the bottom surface 19 is formed from the original fiber element 111a. A plurality of medium and large diameter bottles 20 are protruded in a predetermined arrangement, and a stepped cylindrical cavity 21 is formed on the top 1i16, and its bottom surface (top 1
1) At 22, there is a bar 23 which has a larger inside and diameter than the party 7 Aiba core 1il11, and whose tip abuts the tip sK of the bottle 20.
・It is provided in the same arrangement as the bin 20. ・The stepped portion 21m of the cavity 21 in the upper M16 is the same as the core 2.
This is the part where the locking part 9 is formed, and the lower part 57 is provided with a protuberance s24 for forming positioning #18.

A molten resin is injected into this gold plate 15 through an injection port (not shown), and when the resin hardens, a core 2 with minute holes 6 and core insertion holes 7 is molded. A connector is constructed by combining it with the dragon handle 3 and the holder 4.

Next, a core was molded using a cylindrical cap with six bottles and rods set up inside a cylindrical capi, which was actually produced and used to demonstrate nine connectors and their connection characteristics. Bottle value is 127 pm, bottle length #il
Transfer molding was carried out using glass fiber phenolic resin with a molding material of 90. The molding was performed with an accuracy of 4.50020.002. The core diameter is 50 pwh in the micro hole in the core and the hole in the core.

A graded dust quartz fiber with an outer diameter of 125 μm was passed through and fixed with adhesive, and the end was polished to assemble a plug. on the other hand,
The receptor, like the core, can be made of 11-layer phenol transformer 771It type.

The inner diameter of this dragon butakuru was 44O4: 0.002m. In addition, the holder was manufactured using a 4-meter injection molded polycarbonate resin. The cores, receptors, and holders obtained as described above were used to connect the JT connectors to each other, and the connection characteristics of the LED (light emitting diode, wavelength 0.85
Using a 30mm connector (μ), it is constant. Measurement results 'f: Table IK Table 1 As can be seen from this table, the average loss was Q, 74B. In addition, the variation in WI loss after 100 connections and disconnections was an ant-sized 0.24 clB. For example, multi-core cables having a plurality of fibers can be connected in the same valley and with high accuracy. Since the core and receptacle are provided with alignment threads and protrusions, their fitting ensures reliable alignment and rotation prevention. In addition, since it is small and easy to assemble, connection work can be done on-site.Furthermore, according to the manufacturing method for the core of the multi-fiber optical connector, the core used for this connector can be easily assembled. It can be mass-produced at a low price and can be mass-produced at a low price.
Figure 2 is a # diagram of a conventional single-core connector, Figure 3 ←).

←), 0 is the conventional multi-core connector; cross-sectional view of the connector, 11+ view of the receptacle and plug -1M4tlJ (Ik) is a cross-sectional view of J11f@, which is a part of the present invention, and Iris 4 Seki can) is the same figure (c)
) Middle 01-1 arrow section - 1, Figure 5 i), φ) A perspective view of the embodiment of the core, IIIaOk), ←) are perspective views of the upper and lower plates of the entire transport for molding the core. Fig. @7) is a cross section of the mold *#A, $17 Fig. ←), ←) is 1-1 in Fig. 1)
A cross-sectional view of the arrow and a cross-sectional view of the 1st layer are shown in the figure.In the middle, lrj original fiber core edge, 1 key is the original fiber edge, 2 is the core, 3 is the receptacle, 4 is the FA plug, 8 is alignment Ditch, 10t! Positioning protrusion, 15ti metal lug, 16 is a shed, 17 is a lower board, 18 is a cavity, 20#i bin, 23 is a bar.

patent applicant Japan Telephone Public Corporation Representative person W-Buried Earth Nine Stones Department (1 other person) Figure 1 105 105 Figure 3 Figure 4 Figure 5 6/7

Claims (1)

[Scope of claims]
It has a pair of cores that are oriented and parallel to the axial direction on the outer surface, and a positioning protrusion that fits in the positioning thread in the inner direction of the cocoon-like T-less illumination. It shall consist of a receptacle for fitting the positioning guide of each core into the positioning protrusion and accommodating both cores against each other, and a holder for holding each core with respect to this receptacle. (2) A pin t* with a diameter slightly larger than that of the optical 7-eyeper device is installed in the cavity so that the tip surface touches the tip of the 64-type bottle and the original fiber. LL7-Fill a metal mold with a diameter slightly larger than LL7 with @ melting plastic, and after it hardens, multiple microscopic people inserted into the original fiber element 1li7 and the original fiber core AT- are passed through. Method for manufacturing a core for a multi-core optical connector using core layer insertion yct and core T-bottom molding and t-W imitation 0