JPS6312324Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Technical field of the invention When testing a large number of optical fibers, a ferrule is attached to the tip of the optical fiber, and the ferrule is connected to a tester to test the performance of the optical fiber.

This invention is used in such cases and allows a ferrule with an optical fiber to be easily attached to and detached from the tester.

(b) Prior Art and Problems When testing the performance of an optical fiber, conventionally the optical fiber is attached to and detached from a tester by the following means.

First, a ferrule is attached to the tip of the optical fiber to be tested, and this ferrule is assembled into the plug of the optical connector.

This plug is then coupled to the receptacle of an optical connector connected to the photodetector.

However, in order to test a large number of optical fibers using such conventional means, there is a problem in that it takes time and effort to connect and disconnect the optical fibers to and from the tester.

(c) Purpose of the invention The purpose of this invention is to enable efficient testing of a large number of optical fibers by providing a ferrule attachment/detachment mechanism that allows easy attachment/detachment of ferrules with optical fibers.

(d) Example of the invention First, Fig. 1 shows a diagram of the components of an example of the invention.

10 in Figure 1 is a block, 20 is a ring, 30
40 is a locking member, 40 is a ferrule, and 50 is an optical fiber.

The block 10 has a male screw part 11 and a relief part 12, and has a hole 13 in the center. The outer diameter of the relief portion 12 is made smaller than the outer diameter of the male threaded portion 11.

The ring 20 has a flange 21 and a step 22. A flange 21 and a stepped portion 2 are provided on the side surface of the ring 20.
A notch 23 is provided across 2, and a hole 24 is provided in the center.
is open.

The ring 20 is made of an elastic material such as linsei copper, so that the notch 23 can be narrowed or expanded.

The lock member 30 includes a lever 31 and a housing portion 32.
There is. The lever 31 has a notch 33 and an end 34, and is formed into a semicircular shape as a whole, with a small circle cut out in the center. And the lever 31 is the locking member 30
It is rotatably held by a fulcrum 35 provided at.

The ferrule 40 has a stepped portion 41 for attaching the optical fiber 50 to the ferrule 40.

Next, the relationship between the lever 31 and the lock member 30 is shown in FIG.

The lever 31A in FIG. 2 is shown rotated outward about the fulcrum 35, and the lever 31A in FIG.
B is a diagram of the state rotated inward.

The lever 31B is adapted to be accommodated in the accommodating portion 32 of the locking member 30 shown in FIG. Also,
The end 34 of the lever 31B is adapted to partially cover a hole 36 drilled in the center of the locking member 30.

Next, a partial sectional view of the end 37 side of the locking member 30 is shown in FIG.

In FIG. 3, 38 is a groove, and 39 is a female thread.

The flange 21 of the ring 20 is inserted into the groove 38, and the female screw portion 39 is screwed to the male screw portion 11 of the block 10.

Next, FIG. 4 shows an assembled sectional view of FIG. 1.

FIG. 4 shows a state in which the stepped portion 41 of the ferrule 40 is held by the end surface 14 of the block 10 and the lever 31.

A photodetector (not shown) is placed on the left side of the block 10 in FIG. 4, and detects the optical signal passing through the optical fiber 50.

To assemble as shown in Figure 4, proceed as follows.

First, the notch 23 of the ring 20 is placed on the side surface of the relief part 12 of the block 10, and the ring 20 is attached to the relief part 12 while pushing so that the notch 23 widens.

Next, the lock member 30 is rotated so that the male threaded portion 11 of the block 10 and the female threaded portion 39 of the lock member 30 are screwed together. As a result, the end 37 of the locking member 30 hits the ring 20 attached to the relief part 12, but since the end 37 is tapered, the rotation of the locking member 30 compresses the ring 20. The flange 21 of the ring 20 now enters the groove 38.

When the flange 21 enters the groove 38, the elasticity of the ring 20 prevents the flange 21 from coming out of the groove 38.
Even if the locking member 30 is rotated in the opposite direction, the locking member 30 cannot be removed from the block 10.

Next, open the lever 31 outward, and
0 from hole 36 toward hole 13.

After inserting the ferrule 40, the lever 31 is inserted into the housing part 32 and closed, and the locking member 3 is closed.
Rotate so that 0 approaches block 10. As a result, the stepped portion 41 of the ferrule 40 is fixed between the end surface 14 of the block 10 and the lever 31.

To remove the ferrule 40, remove the locking member 30.
rotate away from the block 10 and open the lever 31 to the outside. As a result, the fixed step portion 41 is released, so that the ferrule 40 can be taken out.

Even if the ferrule 40 is removed, the lock member 3
0 will not come off the block 10 due to the ring 20.

Therefore, according to the mechanism shown in FIG.
The ferrule 40 can be attached and detached simply by opening and closing the ferrule 1 and rotating the lock member 30.

(e) Effects of the invention According to this invention, the ferrule can be attached and detached simply by opening and closing the lever and rotating the locking member, so that a large number of optical fibers with ferrules can be efficiently tested.

[Brief explanation of the drawing]

Figure 1 is a component diagram of an embodiment according to this invention.
2 is a diagram showing the relationship between the lever 31 and the locking member 30, FIG. 3 is a partial sectional view of the end 37 side of the locking member 30, and FIG. 4 is an assembled sectional view of FIG. 1. 10...Block, 11...Male thread part, 12...
...Relief part, 13... Hole, 14... End face, 20...
Ring, 21...Flange, 22...Step, 23
...notch, 24 ... hole, 30 ... lock member,
31...Lever, 32...Accommodation part, 33...Notch part, 34...End part, 35...Fully point, 36...Hole,
37... End, 38... Groove, 39... Female threaded part,
40...Ferrule, 41...Step, 50...Optical fiber.

Claims (1)

[Claims for Utility Model Registration] A male threaded portion and a relief portion are provided in the block, a first hole is formed, a flange and a first stepped portion are provided in the ring, and a side surface of the flange and a first stepped portion are formed. A side surface is cut out, the ring is attached to the relief part, a second hole is drilled in the lock member, a groove for receiving the flange is provided in the second hole, and a female thread part is screwed to the male thread part. in the second hole,
The lever is rotatably held by the lock member, a housing portion for accommodating the lever is provided in the lock member, a male screw portion of the block and a female screw portion of the lock member are screwed together, and the lever is held in the housing portion. With the second stepped ferrule removed from the
The lever is inserted into the first hole through the hole, the lever is accommodated in the housing part, and the lock member is rotated while holding the second step part with the lever, so that the second step part is connected to the block and the lock member. A ferrule attachment/detachment mechanism that is held by a lever.