JPS5945414A - Optical fiber plug and its production - Google Patents

Abstract

PURPOSE:To obtain an optical fiber plug having high performance at a low cost by forming concentrically and integrally a ceramic pipe in the end of a plastic pipe. CONSTITUTION:A ceramic pipe 11 is concentrically disposed in one end of a plastic pipe 9. the small hole 10 of the pipe 11 is made to have the inside diameter slightly larger than the outside diameter of the strand of an optical fiber. The through-hole 12 of the pipe 9 is formed to the diameter slightly larger than the outside diameter of the core of the optical fiber. The outside end face of the pipe 11 is made flush with the end face of the pipe 9. The pipe 11 is beforehand worked with the small hole 10 to a specified size. The outside circumferential size of the pipe 9 on the pipe 11 side is thus made to a prescribed size and the center thereof and the center of the hole 10 are aligned. The optical fiber plug having high performance is obtd. at a low cost by the above-mentioned method.

Description

[Detailed Description of the Invention] Tonoiroma Q, 11 column low-t',)'r: Used for Noyama Haku,)Y, Used to core change the fiber to the 'jM exit J function. Annoying 9Y1 firebombing and its 8t
``This is the first step in the notification method.

<Prior art 7> In general, the optical fiber = I connection i+, )' (: The fiber is inserted and fixed i) into the plaque and the plug comrades are combined. , from Akubuta (aligned three 7), which has i-row Noro/Kome no Ki 111 (one is made 7). The conventional pluggister first Nk/: ゛)'-C,
i+7'4)11'(%'+field2 c/,+=
In the HH section, 7 fiber tension lines 30ff: a slightly larger foramen 4 is formed in the inner center of the elbow CI/'1k. The characteristic of this plug is that the information is 111171'I and is made of metal (1゛4!).The mechanical properties of this plug are as follows: 2 outer diameter,
Dimensional accuracy such as the diameter of the small hole 4 and eccentricity of the small hole 4 on the outer periphery of the cylindrical body 2, and the shape of the sheath 1. It is a strict affirmation of llI.

As shown in Fig. 2-1, a conventional plug has a small hole 8 in the center of one end of the metal cylindrical body 6, which has a small hole 8 machined with high precision in a ceramic material for connecting fibers. Lamic? A combination of J゛7 is also being developed.

The two types of conventional plugs such as Tono 1 are manufactured by reconnaissance machining of Takagaku 11 (Takakotsu 11), realizing high performance original connectors.

However, all of them are made using metal as the main material,
9J cutting and grinding culm is a must-see.1. , L sieve 114
We use special processing machines and jigs to perform degree processing,
The drawback is that it requires a lot of time to manufacture.

In recent years, for the purpose of improving high-volume production and lowering costs, it has become increasingly common to manufacture plugs having the shape shown in FIG. 1 entirely using plastics. However, more than 100 μm
The small hole 4 with the dimensions of The relative position 11゛ between the outer periphery of
−r Match ij Jl+λ plastic (
” processing) I hope you can make it happen with the technique. If you can/can't do it -
And l, even... 11° Always complicated, IJJ Rizo TO'?
So, 1? ): lf+': %l2Monoβ, 1'I, it is not possible to supply a costly flag.
rnt2 and "';!7-I-)re2).

<Invention lil, CH・''> In order to eliminate the drawbacks of this invention t, 1, j+, etc., a ceramic tube is integrally molded concentrically inside the plastic shield end 1' Ceramic gold 4 has high eaves field soil characteristics and '711 type] mountain mechanical properties) (: The fiber is fixed and the plastic molding process is used to transmit the Plus Book "t"; Easy to form, quality 1
'if: and low cost i+:, )'(: provides a two-eye bluff fB-j.

<Actual) i'ili example>To" 31 Kawake, 1 Jin's?i', Akini", Lubu 1', Example of fiber plug*, 7T: L-, Plus Book 7
°j9 one 5L1□111 part ceramic t;+11
are arranged concentrically. Ceramic? ? The small hole of A11 + (1#;, 1:) 1mer 1 = f yt to be VJ; the inner diameter is slightly larger than the plain outer diameter of the fiber.

P FJ) of the through hole 12 of the plastic tube 9 (: Slightly larger than the outer diameter of the fiber core 1 (ai! (including the outer tube) 1, of the ceramic tube 11 of the FC through hole 12: 1lI
If f < It, 11 through hole 12 and small hole 10 are continuously 1
)7: Tapered portion 13 to be crushed. Ceramic 11 outside 91+, i 1rll is plastic'? ′
A collar 15 is integrally formed on the outer periphery of the intermediate portion of the plastic rib 9, and a radial air vent hole J6 is connected to the end surface of the collar 15 at the end surface of the collar 15. It is formed so that it reaches 12]1.

Ceramic tube 13. &-J-komekohole1() ji!
, process l, 7 to fixed month method, this process i: 'j#
In addition, the length of the small hole 1 () can be made sufficiently long, and the ceramic Ti' 5 fibers ^-molding 1/f- from iL(+':'t
, can be fixed to . If it is a cow, Jt', j shape will make ceramic '1'', 111 side plastic'?r
9 has a predetermined size, and its center and small hole IO
middle J1] can be matched. Furthermore, it has a simple structure, and is easier to operate than conventional plugs.
There is a significant improvement effect in this respect. In the butt connection of optical fibers, -t&J: 2 I.Q+relative position ir'j of redundant fibers, '4+'I degree becomes type 1 movement. At this time, the mold is opened by turning the outer L'11 concave = J method and the same 11KIj [-small hole 10 as I Jr';l &1 center Q. This 11 is first ←-1,1, ben-”:
Uprl, 7' Forming of sysdec tube 9+Ij.

Kesatsu Lamic Stone 11 Reiita V (Achieved by completing J + J.

j゛, I, -i, -re ζ, ＞+s 3 ps IV Indication 1
2. How to manufacture a fiber plug?
So 4i・+i (ill or 0 ['i' is formed.
□;'l? [Same punch as the conventional optical fiber plaque shown]
1', shape ti: (5 (below) 1 quasi-ferrule and +v1') or tapered, partially discharged and contained in 1+r. Jig】) 1 upper Q/flag body σ) 19 is placed on the edge that will become the middle 713 part JLX stake - Jig 20 that will become the brim part on it, Ig I+, 'i, ', part 11 1, 21 is missing l1lt'/! ,).

t″ (front holes 22, 23, 241rJ, one in the center of the jig 18) formed in the center of the fh tools 19, 20, 21, respectively, -, in Rule 5! and match Φ111.)
i Pa J 什, ] 二 Ja &; I, ” 二 ト.

Ma-j",-'+i (k ferrule 5 ceramic'
Insert a wire 25 into the small hole 8 of R7 that is slightly larger than its inner diameter.
), and fix it so that the end surface of the semi-ferrule 5 protrudes slightly. Finally, using the wire 25 as a guide, insert the ceramic tube 11 into the neck 11 of the ferrule 5.

After conversion, insert the jig 18 by aligning the 1000 end of the IM hole 22 with the opening 51 of the jig 19 on the outer circumferential surface of the ferrule 5.
It's one ton above, and on top of that, Ji-it, 20, Ji A21
Jolt (K small, fix and integrate the enclosure. Jig 19
Is it just the hole 22? '(= 1: base i%I゛ferrule 5
It is said to be slightly larger than the outer circumferential diameter of.

^゛÷After that, the mandrel 26 having a conical tip is inserted into the center of the integrated jig, and the conical tip 61 is inserted into and engaged with the small hole 10 of the ceramic tube 11. Using tools etc., make the holes 22 and 23.

Fix it on the center of 24. After completing the above jig installation, F (through hole 24 and center 11N
, 26, the molding resin joins and enters the gap. After waiting for the assimilation of the fat, the manufacturing process is completed by dividing the jig 21 into two by dividing the jig AI8 to the jigyo 21 into 16 L, and removing the mandrel 26. Furthermore, air is vented to boxwood 15 (L,
16, 1 ν, ′, J/-1° This air vent hole 1
6 il] 5 I:J, formed in the outer river Ip1,
Good again.

Such M, I: 1. e'1, the small hole of the ceramic tube 11】0σl l'l+ (J> and the center of the plastic tube 9 can be made to have a product volume of 18 and 'n1 easily -i
'), the flag that has been set can be set. 9. To the river.
Conventionally, the ferrule 5 and the ferrule 11 are the same. l;, < (-Kei 11: A similar shape to the ceramic key V's mirror or Al (can be used, and at the same time, the jig for 7σl is 4% (i is also 4 (''< Teal y'r-me, general-purpose t', u ka is high.

It's ox 15 j! Place the ceramic tube 11 on the wire 25, ・'+,',+4
The wire 25 that lines this small hole IO is jllj-
Although it is a polished product, commercially available tungsden wire has the advantage of being able to produce at a low cost.

FIG. 5 shows another practical example of the invention.

Suna I) Chi, this i゛l (t:J, it; 31st 1
7'r, )Y: to the fiber plaque)Y;
・Iba-dokoro - Nakari fixed 1. Tai 1! 1, 4 in figure 5 shows ``gamma, treatment'', which is exactly the same as the one in figure 4) Ru. and wire 25
7. Connect the shaft 26 to the optical fiber 27 (?':
, 1 is different. ) “1-Fiber 27 is
Fainorik 1'gong 8''
It's L-.

The specific manufacturing process is V, 1, first fine (approximately 2
Place the ceramic tube 11 on top of the tip 1 of the ferrule 8, and insert the non-niferous fiber prefix 28 into the small hole 8 of the quasi-ferrule 5. Next, place the optical fiber 27 in the soil of the jig 18 by placing the optical fiber 27 in a concave position (1). It is preferable to attach a support to the outside so that it can be fixed in the center. "2) iC+" -? ·Ku. After this,
Resin is injected from the gap between the optical fiber 27 and the tracking hole 24 in the center of the jig 21. 17'; After shaping, separate each jig into 1' Al and place it in the hook by 7)'1. The optical fiber inner paper plug to which the fiber 27 is fixed is completed.

1 = Oh, it makes the actual manufacturing process easier, and +'ri+
In order to improve the performance, the molding jig should be provided with an outlet to remove the air inside it. I) It is desirable to define 11.

The above h (, two plugs made of Katahata soil 17
, 17' are inserted into the adapter (alignment sleeve) 29 from the direction opposite to M and K as shown in 1. In this case, use the adapter 21J, either gold, bow, or plastic, 1 round but fiber optic plug 17 and 7' plastic with a good appearance. There are advantages to doing so.

As described above, the present invention's optical fiber assembly 2j,) v1 fiber is fixed 21! Ceramic 'r? with a small hole in the center ttl+. 1 i and this + lamic tube 11 in a converted form plus book? (9), the optical fiber can be assembled precisely in the center of the plug, and the length of the shaft can be 1', +li'i li
A significant effect can be expected in this respect.

By forming 16 lines on the molding process, it is possible to manufacture optical fiber plugs with high quality and high productivity, which greatly contributes to the cost reduction of optical connectors.

[Brief explanation of the drawing]

Figures 1 and 21! ! 2I shows the 4'M construction of the conventional 7-fi, C plug, Figure A is a cross-sectional view parallel to the qih center, Figure B is a cross-sectional view perpendicular to the axis, and Figure M3 is the light beam according to the present invention. An example of a fiber plug is shown in Fig.
FIG. 6 is an exploded perspective view showing an example of a jig for explaining the method of manufacturing an optical fiber plug according to the invention. 9 nibra boot tube, 10: small hole, 11 knee hiramitsu tube, 12: l'j through hole, 18, 19, 20゜21
=Forming jig, 25: Wire, 26: Shinshin, 27: Optical fiber, 28: Fiber wire, 29: Attarpuku (alignment sleeve). Agent Kusano f O 4 Mouth O 5 Mouthful 6 G

Claims (3)

[Claims] (1) Optical fiber 91. '1 (4tp of ceramic tube and its ceramic chamber are built into one end, and the other is 1% A!) - Memo: This is to lead out the fiber. Yes, the outer periphery of the end of the lamic Ti1 is aligned with the alignment sleeve and 11〈
A plastic plug made of plastic. (2) With the inner diameter at the center) °f, the optical fiber plug has a small hole slightly larger than the diameter of the fiber. After machining a small hole in the center of the ceramic eyebrow σ), insert a thin wire with a diameter slightly smaller than the straight/J\ hole in the center, and make the outer diameter the same as the connector diameter. A stone-like part (O) having the same dimensions is protruded from the first jig, and the part protruding from the f'+iti of the tubular part 1 is a V optical fiber with a thickness of lll-thick.
j (projects from the center, and slightly protrudes from the tip m1li of the tubular part [7 on the line) Y, the fiber strand is y-ki l ((L, /ζ ceramic tube with inner diameter Place the mandrel so that one end of the ceramic tube is in contact with the tip of the above-mentioned tubular part σ) through Ji=i, and placed above the center of the small hole at the other end of the ceramic tube, and then 1 fjt concentrically connected to the center and the mandrel 1
5. A method for manufacturing an optical fiber plug, characterized in that a molding jig is used to perform molding by injecting resin into the gap between the molding jig and the mandrel. (3) A ceramic tube with a small hole whose inner diameter is slightly larger than the diameter of the optical fiber is placed inside one end of the plastic tube, and the strand of the original fiber is inserted into the small hole of the ceramic tube as described in 17. In the manufacturing method of an optical fiber plug, in which the optical fiber is led out from the other end of the plastic tube, the optical fiber plug has a slightly larger hole on the central axis, and the outer diameter of the plug is A tubular part having the same dimensions as the above is projected from the top of the first part I; a ceramic tube is inserted onto the strand at the tip of the optical fiber, and the strand protruded from the ceramic tube is inserted into the tubular part I. The optical fiber is inserted into the small hole 2, and the optical fiber is placed on the center 11 of the M-shaped member. : l, te conversion 47)
However, it is also possible to create a gap between the optical fiber and the optical fiber (1').
・Using a molding jig, the tree 11'+r is formed in the gap.
Ruir: Made of fiber plug;'+]j )j 7
Ha.