JPS6269213A - Optical connector - Google Patents

Abstract

PURPOSE:To improve operability by inserting the guide pins of an adapter molding part into the guide pin insertion holes of optical connector plug molding parts and thus coupling the contact surfaces of the facing optical connector plug molding parts at the hole part of the adapter. CONSTITUTION:When optical connector plugs are coupled mutually, the guide pins 7 of the adapter molding part 6 are inserted into the guide pin holes of the plug molding parts 3 and then the contact surfaces of the plug molding parts 3 contact each other in the contact guide hole 8. For the purpose, l<2l, where lc, is the projection length of the contact surfaces 5 and la is the length of the contact guide holes 8 of the adapter molding part 6. Further, the plug molding part 3a and adapter molding part 6 are so designed that the pitch of the guide pin holes 4 is equal to the pitch of the guide pins 7 of the adapter molding part 6.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an optical connector that realizes positioning and coupling using guide pins, and in particular provides a multi-core optical connector that is excellent in η-removal properties.

(Prior Art) FIG. 3 shows a plan view of a conventional optical connector that realizes positioning and connection using guide pins, and FIG. 4 shows a contact surface view thereof.

In the drawings, (1) is a multi-core optical fiber, and (2) is a multi-core optical fiber, which are positioned and fixed in a resin-molded plug molding part 3). (2) is the insertion hole for the two guide pins ■ that position both plug molded parts (, 3), and the contact surface into which the guide pin hole (4) and the optical fiber ■ are inserted. They form the same plane.

When connecting optical connectors, attach one plug molding part (
3) Insert the two guide pins ■ into the hole for the ID pin (■) respectively, and insert the guide pin hole (4) of the other plug molded part (3) into the ID pin ■ to achieve the connection. .

Although the housing of the optical connector is omitted in the figure, the optical connector housing that presses and fixes the optical connector after coupling is formed of a spring, a press ring, an outer cylinder, and the like.

(Problems to be Solved) The above-mentioned coupling of optical connectors has the following problems.

Since two independent guide pins are used, each guide pin must be inserted into the guide pin hole of the plug molding part one by one before being connected, which is time-consuming.

■When connecting, it is necessary to prepare a separate guide pin, but guide pins are usually small in diameter, about 0.5 to 1.0.1φ, and length is less than 1 G, so it is difficult to use such small guide pins. Handling optical connectors at the site where they are actually used is likely to result in loss and difficulty in terms of workability.

■When inserting the guide pin into the guide pin hole of the plug molded body, because the guide pin is held with fingers 11, the fingers may hit the contact surface of the plug molded body and damage the polished end face of the optical fiber. There is a risk of getting dust on the surface, so careful work is required, resulting in difficult work.

■When attaching and detaching an optical connector, it is not fixed which side of the plug molded body the guide pin remains on.

Therefore, when switching the other optical connectors 7, it is necessary to attach and detach the guide pins each time, resulting in poor work efficiency.

■When using one of the plug molded bodies fixed to the equipment side, if the guide pin remains on the plug molded body on the equipment side, it is difficult to remove the guide pin, making it difficult to connect the optical connector stably. It's difficult.

(Means for Solving the Problems) The present invention solves the above-mentioned problems and provides an optical connector with excellent connection/detachability. An optical connector plug molded body having an end face with a protruding contact surface into which a fiber is inserted, and an adapter molded part in which a guide pin is positioned and fixed to the resin molded part and receives the contact surface of the optical connector plug molded body. This is because the contact surfaces of the opposing optical connector plug molding parts are connected at the hole part of the adapter by inserting the guide pin hole of the optical connector plug molding part into the guide pin of the adapter molding part. .

(Embodiment) Fig. 1 is a plan view of an embodiment of the optical connector of the present invention, Fig. 2 (A) is a connecting surface view of a plug molding part, and the same figure (dotted line shows a connecting surface view of an adapter molding part).

The optical connector of the present invention consists of a plug molding part (J) and an adapter molding part (611). It is equipped with a guide pin hole (2) for coupling, and its end surface is similar to the guide pin hole (2) shown above.
), a contact surface (2) with an optical fiber (2) protrudes by a length Qc.

The adapter molding part (2) has two guide pins (2) inserted therein and is provided with a contact guide hole (2) for receiving the contact surface of the plug molded body (3).

When connecting, insert the guide pin hole (4) of the plug molded part (■) into the guide pin of the adapter molded part (e) so that the contact surfaces (■) of the plug molded part (3) are mutually connected in the contact guide hole (■). configured to make contact.

Therefore, the protruding length J2c) of the contact surface (2) has a relationship with the length Q4) of the contact guide hole (2) of the adapter molded part 0 as fla<212c. Also, as a matter of course, the pitch of the guide pin holes (2) of the plug molding part (3) is designed to be equal to the pitch of the guide pins (2) of the adapter molding 111 ((6)).

In this way, in the optical connector of the present invention, whereas conventionally the guide pins on both sides were inserted into and removed from the plug molding part, they are integrated into the adapter molding part so that they can be handled. A contact guide hole is provided in the part, and the contact surface of the plug molding part is configured to make a contact connection in the hole.

(Experimental Example) A multi-fiber optical connector of the present invention using a five-fiber optical fiber ribbon was prototyped and evaluated.

The 5-core optical fiber tape has a core diameter of 50 μm and an outer diameter of 12
5 μm optical fibers are arranged at a pitch of 0.3 ms.

Adapter molding part is width 7.4 @ 11% length 3 mm, height 6
1. A contact guide hole of approximately 2 mm x 2 mm is provided in the center, and the guide pins are 0.7 mm thick with a 46 mm pitch and protrude approximately 3 holes on each side. .

Therefore, the total length of the adapter molded portion including the guide pin is approximately 91111 mm.

On the other hand, the plug molding part has a width of tws, a length of 14mm, a height of 6mm, and the holes for the guide pins of 0.7mφ are at a pitch of 4.7
The optical fiber is glued and fixed within the plug molding at the same 0.3 l pitch as the 5-fiber tape, and the protruding length of the contact surface is 1.81 l. Established.

When such a plug molded part and an adapter molded part are combined using a matching agent and the plug molded parts on both sides are fixed under pressure by nozzing, the average bonding loss is 0.1 at n=50.
It was good, with a maximum of 8 dB and a maximum of 0.45 dB. 100
The connection 11 loss variation in the rotation test is ±0. It is within IdB, and the result of the 1000-time standoff test is also ±0.2d.
It was confirmed that the variation was within B, and there was no problem in practical use. Furthermore, even in a one-cycle test at -30°C M+70°C, the loss variation was as good as 0.2 dB or less. In the experiment, the hole for the guide pin was set to a depth of about 4 mm, but there is no problem even if this part is made into a through hole.

(Effects of the Invention) The above-described optical connector of the present invention provides the following effects.

■Workability is significantly improved because you only have to operate one adapter molding part instead of handling small independent guide pins as in the past.

■Since there is no need to directly hold the guide pin surgically, problems such as damaging or staining the contact surface are drastically reduced.
The binding properties become stable.

■There is no problem of the guide pin remaining in one of the plug molding parts as in the past, and the workability of attaching and detaching is improved.

[Brief explanation of drawings]

Figure 1 is a plan view of an embodiment of the optical connector of the present invention, Figure 2 (a) is a connecting surface view of the plug molding part in Figure 1, and figure (b)
shows a combined surface view of the adapter molding part. FIG. 3 is a plan view of an example of a conventional optical connector, and FIG. 4 is a coupling surface view of FIG. 3. 1... Optical fiber tape core wire, 2... Optical fiber,
3... Plug molding part, 4... Hole for guide pin, 5...
...Contact surface, 6...Adapter molding part, 7...
Guide pin, 8...Contact guide hole.

Claims (1)

[Claims] (1) In an optical connector that realizes positioning and coupling using guide pins, an optical connector plug molded body is provided with an end surface in which a contact surface into which an optical fiber is inserted protrudes from a surface having a guide pin hole. , an adapter molding part having a guide pin positioned and fixed in the resin molding part, and having a contact guide hole for receiving the contact surface of the optical connector plug molding, and the guide pin hole of the optical connector plug molding part is connected to the adapter molding part. An optical connector characterized in that the contact surfaces of opposing optical connector plug molded parts are connected through a contact guide hole of an adapter by being inserted into a guide pin of the adapter.