JPH0410604B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a connector for an optical fiber transmission line, and particularly to an optical connector that deflects an optical path at right angles.

(2) Purpose of the invention In the field of optical communications using optical fibers as optical transmission lines, it is essential to connect and disconnect optical fibers.

Recently, there have been remarkable developments in various optical connectors for such parts, but most of them are linear optical connectors. On the other hand, optical communication devices are also required to be mounted in high density due to the miniaturization of various parts and elements, and the optical transmission lines used therein are also required to be arranged in a small space. In such cases, the optical fiber connection to the circuit device using the conventional optical connector described above has a limit in miniaturizing the device because it requires a space for the optical fiber connector to protrude orthogonally and a bending allowance for the optical fiber.

In view of these points, the present invention provides an electrical connector,
It is an object of the present invention to provide an optical connector that can minimize the space required for right-angle deflection of a line in an optical fiber transmission line as well as in a coaxial line connector.

As for such optical connectors, there have been few disclosures of known specific configurations, and the present invention is intended to demonstrate its practical feasibility.

(3) Structure of the Invention The above object is the gist of the structure of the present invention. This is achieved by forming an angular surface by the two surfaces, and attaching an optical path deflection assembly to the angular surface to connect the optical path between the optical fiber and the optical fiber connector coupling part. It is possible to provide a simple optical connector with high precision and excellent manufacturability.

(4) Embodiments of the Invention The optical connector of the present invention will be specifically described below with reference to embodiments based on the gist of the invention and with reference to the drawings.

The drawing shows an assembled sectional view of an embodiment of the optical connector of the present invention.

In the figure, a connector main body 1 is a block having an approximately L shape, and through holes 2 and 3 are bored in the same plane and intersecting at right angles. The holes 2 have the same diameter and pass through, and the other hole 3 has a large diameter portion 4 and a step 5 formed therein.

On the outside of the hole 2 side, there is a C made of spring material in the circumferential groove 6.
The C-shaped ring 7 is fitted into the inner circumferential groove 10 of the bag-shaped nut 9 having the screw 8, and the C-shaped ring 7 expands and returns to fit therein, thereby preventing the nut 9 from moving in the axial direction so as to be rotatable.

At the outer end on the hole 3 side, a screw 12 is provided following a tapered taper 11, and the taper 11
A plurality of axial slots 13 are provided in the part,
A tightening nut 14 is fitted on the outside of the tapered portion 11 to move the tapered portion 11 in the axial direction and tighten the tapered portion 11 toward the center.

The coating of the optical fiber cord 15 is peeled off for a predetermined length at the tip end, and the optical fiber core wire 16 is exposed.
The core wire 16 is inserted into the center hole 18 of the optical fiber support sleeve 17, which has been finished with accurate dimensions, and the distal end surface is optically finished. The outer periphery of the support sleeve 17 fits accurately into the hole 3, but the large diameter portion 4 fits into the optical fiber cord holding sleeve 19 against the stepped portion 20, and the adhesive injected into the grooves 21 on the inner and outer circumferences. It is fixed by the agent 22.

The retaining sleeve 19 further includes an optical fiber cord 1.
5, and the cord 1 is inserted into the inner hole.
The reinforcing material 23 of No. 5 is folded back and fixed together with an adhesive material 24 injected together.

In other words, the support sleeve 17 and the holding sleeve 19 are press-fitted and adhesively fixed in advance, and the ends of the optical fiber cord 15 are peeled off and finished with insertion and adhesive. Return the tapered tapered rubber bushing 25 that was previously inserted onto the cover and insert the groove 26 in the end of the retaining sleeve 19.
This protects the fitting cord 15 from sudden bending. The taper 27 in the support sleeve 17 facilitates the insertion of the core wire 16 and ensures the amount of adhesive 24.

The holding sleeve 19 thus assembled is inserted into the holes 3 and 4 of the main body, and the nut 14 is tightened to reduce the tapered portion 11 and fix the holding sleeve 19.

At the portions where the holes 2 and 3 intersect at right angles, angular surfaces 28 and 29 are formed that are perpendicular to the axes (optical axes) of the respective holes. An optical path deflection assembly 30 is mounted on this corner surface of the main body 1.
mounted on. The support 31 of the assembly 30 is a cubic block with holes 32 and 33 drilled in alignment with the optical axis, and oriented in the direction of the holes 32 and 33 at a point perpendicular to the optical axis.
A 45 degree inclined surface 34 is recessed. This hole 3
2 and 33 are spherical lenses (or cylindrical lenses)
35 and 36 are fitted and fixed with adhesive or the like. Further, a reflecting mirror 37 is attached to the inclined surface 34. Therefore, the reflective surface is located at a point perpendicular to the optical axis. This assembly 30 is assembled externally and has corner surfaces 28, 2.
9 with screws 38. Also,
A cover 39 is attached to and covers the outer surfaces of the corner surfaces 28 and 29.

As described above, the optical signal transmitted to the optical fiber cord 15 is transmitted through the optical fiber core wire 16, is emitted from the end, becomes a parallel beam of light by the lens 36, is deflected by 90 degrees by the reflecting mirror 37, and is reflected by the lens 36. 3
5, the central optical fiber 41 of the optical fiber connector 40 is inserted and fixed into the hole 2.
The incident transmission is from the end face of the Of course optical fiber 41
16 can also be transmitted.

In the present invention, the relationship between the coupling nut and the optical fiber connector 40 described above may be reversed, and one-touch coupling can be achieved by using a bayonet type coupling. This part can also be coupled to a light element, for example a light-emitting unit, a light-receiving unit.

In addition, it is also possible to use a concave mirror, a light guide, etc. as the deflection light stage, and it is also possible to provide it on the lens body 1 side, and the optical fiber attachment part is not limited to the configuration of the embodiment.

(5) Effects of the Invention As described above, the optical connector of the present invention has an optical fiber attachment part and an optical fiber connector coupling part in the connector body, and a part where the optical axes of the optical fiber attachment part and the optical fiber connector intersect. By providing an angular surface formed by a surface orthogonal to the optical axis of the optical fiber connector, and providing an optical path deflection assembly that connects the optical path of the optical fiber and the optical fiber connector to this angular surface, it is extremely simple and easy to manufacture. The practical effect of being able to obtain high precision and connect optical circuits in a limited space is remarkable.

[Brief explanation of drawings]

The drawing shows an assembled side cross-section of an embodiment of the invention. In the figure, 1 is the main body, 2 and 3 are through holes, 9 is a bag nut, 15 is an optical fiber cord, 16 and 41 are optical fibers, 28 and 29 are corner surfaces, 30 is an optical path deflection assembly, and 34 is an inclined surface, 35, 36 are lenses, 37
is a reflecting mirror, and 40 is an optical fiber connector.

Claims (1)

[Claims] 1 In the connector body 1, at the part where the optical axes of the optical fiber 16 attachment part and the optical fiber connector coupling part intersect in the same plane, there are corner surfaces 28, 29 formed by two surfaces perpendicular to the respective optical axes. form,
an optical path deflection assembly 30 connecting the optical path of the optical fiber 16 and the optical fiber connector coupling portion to the corner surface;
An optical connector characterized by having a.