JPS58107507A - Connector plug of optical fiber - Google Patents

Abstract

PURPOSE:To reduce the cost greatly for a connector plug of optical fiber, by dividing a cap nut into two parts and providing a coupling male screw between an external driving screw and a shell stopper part. CONSTITUTION:A cap nut contains the 1st and the 2nd members 2' and 2'', and a sheel 4 contains a flange 6. The flange 6 rubs a guide hole 7, and the forward shift extent of the ahell 4 is decided by a shell stopper part 8. The members 2' and 2'' are connected to each other by means of a male/female screw 9, and an external driving screw part 10 is provided for the cap nut. The guide hole 7 belongs to the member 2''. While, the screw 9 exists at the outer circumferential part of the intermediate part between the part 8 and the screw 10. Therefore the screw 9 belongs to the member 2''.

Description

[Detailed Description of the Invention] The invention relates to one lug of the original fiber connector, and more specifically to an external fastening member essential for fastening with the outside, among the lug of the original fiber connector, which is easy to structure and assemble. be.

As shown in Fig. 1, the conventional simple optical 7-eye connector 1 lug (hereinafter referred to as the "plug") 1 has an external fastening member 2.
(hereinafter simply referred to as "r cap nut") is composed of one piece.

To assemble this 1 lug 1, first, the original fiber 5 is inserted into the shell 4 into which the ferrule 3 with a fine hole has been driven, and fixed with adhesive, and then the end face of the ferrule 5 is polished. This is required. Moreover, at this time, all the parts that make up the plug 1 must be inserted, so the cord (not shown) must be inserted in the case of gluing 1 and polishing 1.
It was necessary to temporarily fix the parts in the middle of the parts, and great care was required during the work, making it difficult and rare to increase efficiency.

If the compression nut 2 is a single unit, the shell 44C requires a round spring 11 6D that presses it, and a 7 lange 6 that serves as a stopper, but the external fastening screw 10 of the cap nut 2 is Since it is necessary to overcome the 7-lunge 6, there is a disadvantage that the entire connector tends to be large.

Here, a conventional simple plug in which the cap nut 2 is separated into a 1s1 member 2' and a second member 2'' is shown in FIG.
If this is done, it will certainly be smaller to some extent, and the parts that are inserted into the original fiber cord 5 in advance during assembly will be somewhat lighter and smaller.

However, in the first member 2' of the cap nut 2, the second member 2"
(The outer diameter of the plug 1 as a whole is large and heavy, and the plug 1 is inconvenient to handle.)

Furthermore, when trying to reduce the outer diameter as much as possible, non-standard screws are required, which increases costs.

In order to eliminate these drawbacks, the present invention includes two cap nuts, and a male screw for connecting the second member to the outer periphery of the intermediate portion between the external fastening portion of the first m member and the shell stopper portion. Or, the screw for the second member 2'' is arranged on the cylindrical surface that is almost the same as the sliding movement with the shell 7 flange of the W41 member. explain.

Fig. 5 shows an example in which a male thread for connecting the second S material is arranged on the outer periphery of the intermediate part between the external fastening part and the shell stopper part of the first member of the cap nut according to the present invention, and Fig. 1M4 shows the gel flange. Sliding surface and l! ! This is an example in which fiber screws for connecting two members are arranged on almost the same cylindrical surface.

Here, 2 is a nut filter, especially 2' is its first member,
1 is the 2nd member of the 2' member, 6 is the 7th syringe of the shell 4, 7 is the sliding guide hole of the 7th flange 6, and 8 is the modified amount of the forward movement of the shell 4. This is the shell stopper part. Reference numeral 9 denotes a female and male screw for connecting the cap nut 20, the first member 2', and the @2 part member;

First, in FIG. 5, the guide hole 7 on which the seven flange 6 of the shell 4 slides belongs to the second member 2# of the cap nut 2, and -
The male screw 9 connecting the blade set 1 member 2' and the second member 2 is the first
It is present on the outer periphery between the shell stopper portion 8 and the external fastening screw 10 of the member 2'. Therefore, the acid screw 9 is the second member ft
tc It becomes Otsu who does t4.

In addition, in FIG. 4, the sliding guide surface of the 7 flange 6 of the ring 4 belongs to the i11 member 2', and furthermore, the sliding guide surface of the 7 flange 6 of the ring 4 belongs to the i11 member 2', and the acid screw for connecting the second member 2'' on the same cylindrical surface as this guide surface 7 is shown. For one functional reason, an external fastening screw 10 is formed in front of the shell stopper 8, and a second part connecting female screw is formed in the rear thereof.

The characteristics of the embodiment of the first tζ fifth garden will be explained as follows. That is, since the outer periphery of the external fastening screw 10 and the shell stopper portion 8 of the first member 2' is relatively thick, the diameter of the female coupling screw 9 of the second member 2' is the same as that of the second member 2'.
It has a greater degree of freedom than the figure. Therefore, in this case, screws standardized according to the standard can be set with a margin, which is advantageous in terms of cost.

Furthermore, if somewhat irregular screws are used, it becomes possible to design a connector that is even smaller and lighter.

In addition, in the case of FIG. 4, since the screw 9 for connecting the second member I can be set in almost the same plane as the guide cylindrical surface 7 on which the 7 flange 6 of the shell 4 slides, Lug 1 can be obtained, and this feature can be particularly utilized when forming a high-density connector box.

As explained above, the cap nut 2 is divided into two parts, and the external fastening screw 9 of the #2 member 2' is placed on the outer periphery between the external fastening screw 10 of the wX1 member 2' and the shell stopper part. By arranging the f142 member 2, which has the same or slightly larger inner diameter as the shell 7 lange 60 sliding guide cylindrical surface 7, and the connecting screw 9, a small and lightweight 1 lug can be designed. This not only improves handling during assembly and operability during attachment/detachment, but also reduces the possibility of failures due to drops or impacts, and requires high mechanical precision. This is an extremely important characteristic for an IPA connector.

Furthermore, the present invention has many features, such as not having to set irregular screw diameters, which is advantageous in maintenance, management, and inspection of manufacturing tools, and is expected to significantly reduce costs. It's something.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional plug, and Fig. 2 is a sectional view of a slightly improved conventional simple plug, showing five stripes. FIG. 4 is a sectional view of the main parts of a simple plug according to an embodiment of the present invention. 1...Plug (original fiber connector plug 2) 2...
Cap nut (external fastening member) 2'... Cap nut first member 2# ++l1 Cap nut second member 5... Ferrule 4... Shell 5
...Optical fiber 6...Giel flange 7...
Shell 7 Lange sliding guide surface 8...Shell stopper part? ... Cap nut first member eM2 member coupling screw 10.
...Female screw for external fastening 11...Spring or more Applicant Daini Seikodai Co., Ltd.","

Claims (2)

[Claims] (1) In the original fiber connector 1 lug consisting of two external fastening members, the external fastening member w41 member has a male screw disposed on the outer periphery between the external fastening screw or the bayonet part and the shell stopper part, and the The external fastening member l (an optical fiber connector glove is characterized in that it has an external fastening member consisting of two members) having a pair of external fastening screws, a shell guiding portion, and a shell suppressing portion. (2) In the case of the 7 eye pa connector 2 which consists of two external fastening members, there is an external fastening removal screw or external fastening bayonet in front of the shell stopper part, and an external fastening member 92 in the rear. an external fastening member first member having an acid screw and a shell guide portion for coupling;
an acid screw for coupling the second external fastening member;
A nine-fiber connector 1 lug characterized by having an external fastening member consisting of a pair of male screws and an external fastening member η that connects a shell pressing portion M.