JPS5932982Y2 - Optical fiber connector - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an optical fiber connector.

In automobile wiring, wiring methods that use optical fiber wires for connection lines to each control section have recently been used to prevent malfunctions caused by noise and to reduce weight.
At the stage of practical application, the technology for connecting optical fiber lines to each other or to light receiving and light emitting elements will be developed from the viewpoint of how to reduce light transmission loss and obtain uniform light receiving performance. It is considered a problem.

As a recent technique for connecting optical fiber wires, for example, the one shown in Japanese Utility Model Application Laid-open No. 140452/1983 is known, but in this case, a connection adapter having an axial groove is inserted into the support hole of the connection adapter. The optical fiber wire to be connected is inserted, and then the connection adapter is fitted into the fitting chamber of the connector body and fixed. The holding effect is insufficient.

The present invention was made with attention to the above points,
The connecting end of the optical fiber wire is reliably fixed in a predetermined position based on the fitting of the connecting adapter to the connector body and the tightening operation of the tightening nut.

An embodiment of the present invention will be described below with reference to the drawings.

In the drawings, A is a connector body, and B is a connection adapter made of flexible synthetic resin that is fitted on the left and right sides of the connector body.

Inside the connector body A, left and right fitting chambers 1, 1 are formed symmetrically with an intermediate connection point 2 interposed therebetween.

That is, the left and right fitting chambers 1, 1 are connected to the connection point 2 in the axial direction.
It has a circular wall surface 3°3 that tapers toward the center.

Ring storage chambers 5, 5 are provided outside the left and right fitting chambers 1, 1 and extend through step portions 4, 4.

Male screw portions 6, 6 are formed on both sides of the outer periphery of the connector body A.

A support hole 7 for an optical fiber C is formed in the interior of the connection adapter B, penetrating in the axial direction, and a dividing groove 8 is formed over the entire length in the axial direction.

The outer peripheral part of the connection adapter B is formed into a circular shape, and has a truncated conical fitting part 9 at the front and a small diameter part 11 at the rear via a tapered step part 10.

D is a pressure cylinder, and a small cylinder part 14 is connected to a large cylinder part 12 and a tapered stepped part 13 so as to fit the connection adapter B.
It has a pressurizing collar 15 on the outer periphery.

The large cylindrical portion 12 is configured to be able to enter the housing chamber 5 of the connector body A.

Reference numeral E designates a ring for fixing the optical fiber wire C made of brass or the like, and has annular sharp end portions 16, 16 which are curved into a crescent shape in cross section and directed toward the inner circumference.

F is a tightening nut that is screwed onto the connector main body A, and has a female threaded portion 17 and a pressurized inner flange 18.

In the above configuration, when connecting the optical fiber wire C9C, first tighten the optical fiber wire C2 to the tightening nuts l-F and F.
Pass C through, pressurize cylinder body, and connect adapter B to inside D.
, B, and connect the connecting adapter B, the tip fitting part 9 of B,
After assembling the fixing rings E and E from 9, the optical fiber wire C9C is inserted into the support hole 7.

At this time, the split groove 8 facilitates insertion of the optical fiber line C.

The optical fiber wire C is positioned using a jig so that its end surface coincides with the tip of the fitting part 9, and the tip is polished.
Temporarily fix the ends of 1 with adhesive.

Next, insert the connection adapters B, B combined in this way into the fitting chambers 1, 1 from the left and right sides of the connector body A, and tighten them by screwing the tightening nuts F, F into the connector body. The optical fiber wire C9 faces each other via the pressure cylinder D.
C is brought into pressure contact, and at this time, D is pressurized and deformed between the fixing rings E, E between the pressurized cylinder body and the stepped portions 4, 4 of the connector body A, and the sharp ends 16, 16 are connected. adapter B
, B, and thereby the optical fiber wire C9C
Press and secure.

FIG. 9 shows another embodiment of the present invention, in which the connector body A' is formed with a fitting chamber 1 to a male screw part 6 only on one side, and on the other side via a connection point 2'. A fitting chamber 19 for the light emitting element G is formed, and the connection adapter B to the optical fiber wire C having the same configuration as above are connected to the connector body A.
′ and is compressed and fixed by the fixing ring E through the pressurizing cylinder body with the tightening nut F, the connection point 2′
The light emitting element is brought into contact with the tip of the light emitting element at this point, and this state is maintained.

20 is a mounting flange.

Since the present invention is constructed as described above, based on the fitting of the connection adapter to the connector main body and the tightening operation of the tightening nut, the annular sharp ends on both sides of the fixing ring are directed in the inner circumferential direction. The connecting end of the optical fiber wire can be reliably fixed in a predetermined position by being inserted into the connecting adapter.

[Brief explanation of drawings]

FIG. 1 is an axial sectional view of the optical fiber connector according to the present invention, FIG. 2 is an axial sectional view of the connector body,
Fig. 3 is a side view of the same as above, Fig. 4 is an axial sectional view of the connection adapter, Fig. 5 is a side view of the same as above, Fig. 6 is an axial sectional view of the pressurizing cylinder, and Fig. 7 8 is a sectional view of the fixing ring, and FIG. 9 is an axial sectional view of another embodiment. A: Connector body, B: Connection adapter, C: Optical fiber wire, D:
・Pressure cylinder, E...Fixing ring, F...
...Tightening nut.

Claims (1)

[Scope of utility model registration request] A connector body having a fitting chamber inside and a threaded part on the outer periphery, a synthetic resin connection adapter for the fitting chamber, a pressurizing cylinder for the connection adapter, and a cylinder facing inward on both sides. A fixing ring having an annular sharp end portion, which is cut out from a tightening nut for the connector main body, and an optical fiber wire to be connected is placed in a support hole of a connecting adapter so that its tip is at least aligned with the tip of the connecting adapter. When the connecting adapter is fitted to the connector body and the tightening nut is tightened, the sharp ends on both sides of the fixing ring dig into the connecting adapter and tighten the optical fiber wire. An optical fiber connector characterized by fixing.