JPH0774847B2 - Optical connector - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an optical connector, and relates to a small-sized and low cost push-on type optical connector.

[Background of the Invention]

As for conventional optical connectors, for example, as is well known from "Optical Fiber Communication" published by Telecommunications Technology News Co., Ltd., the fastening of the optical connector is mainly the screw fastening in which a screw is provided on the plug side and the adapter side. Although some examples of the bayonet system are seen in the direction of simple fastening, it was difficult to cope with the downsizing, the economicalization, and the future high-density wiring of the telephone exchanges, computers, and the like.

[Object of the Invention]

An object of the present invention is to provide a small-sized optical connector which has a simple structure and can be easily attached and detached, is low in cost, and has low connection loss.

[Outline of Invention]

In order to achieve the above object, the optical connector of the present invention is provided with a thin hole for inserting a fiber at the center of a cylindrical ferrule, protects the fiber from the ferrule, and at the time of mating the optical connector with an adapter, a ferrule. The spring that secures the pressure when the optical connector and the adapter are fitted together with the integrated part that is press-fitted into the substantially cylindrical hood having the convex portion that prevents the rotation of the adapter, and the housing of the adapter when the optical connector and the adapter are fitted together. The holder that is attached to the outer circumference and has the spring property by the slit provided on the outer circumference of the cylinder, and the spring It is characterized by a small push-on type optical connector with a small number of parts and a split ring to prevent this.

Example of Invention

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a half sectional view of an embodiment of the optical connector of the present invention, and FIG. 2 is a front view thereof. The ferrule 1 having a small hole for inserting the optical fiber 7 in the center and the hood 2 for press-fitting and holding the ferrule 1 are integrated parts, and one convex portion for preventing rotation is provided on the tip fitting side of the hood 2. A spring 3 which has a 2a and which secures a constant pressure on the circumference of the hood 2 in order to obtain a stable connection when they are fitted to each other via an adapter or a receptacle (hereinafter referred to as an adapter) shown in FIG.
Then, a substantially cylindrical holder 4 for locking after fitting with the adapter is inserted from the rear end of FIG. 1, and fixed to the hood 2 with a C ring 6. As shown in FIG. 5, the fitting surface side of the holder 4 is provided with a plurality of slits 4a having an appropriate length on the inner and outer surface sides of the cylinder so as to generate springiness, and then the adapter and the lock are fitted at the time of fitting. It has a convex portion 4b that further reduces the elasticity of the slit 4a due to repeated attachment / detachment. A split ring 5 is attached for the purpose of prevention.

FIG. 3 is a sectional view of an embodiment of an adapter that fits with the embodiment of FIG. It is composed of a housing 8, a precision split sleeve 9, and a bush 10 which holds the split sleeve 9 by press-fitting the split sleeve 9 into the housing 8. On both sides of the housing 8, a concave portion 8a for slidingly fitting and locking with a convex portion 4b of the optical connector of FIG. 1 and both end surface portions are fitted with a convex portion 2a for preventing rotation of FIG. Recess
8b and. FIG. 4 is a front view of FIG. 5 and 6 show an embodiment of a component diagram of the holder 4, and FIG. 7 shows an embodiment of the split ring 5.

〔The invention's effect〕

According to the present invention, conventionally, there was a difficulty in operability with screw fastening or bayonet fastening, but it can be operated with one hand with one hand, and the number of parts is small and miniaturization is easy,
Since it can be mounted at high density on the rack of communication equipment, computers, etc., it has a great economic effect. Moreover, since the spring having a constant pressure is provided, high reliability can be maintained.

[Brief description of drawings]

FIG. 1 is a half sectional view showing an embodiment of an optical connector of the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a sectional view showing an embodiment of an adapter, and FIG. 5 is a front view of the holder of FIG. 1, and FIG. 7 is a perspective view of an embodiment of the split ring of FIG. 1: Ferrule 2: Hood 2a: Anti-rotation convex part 3: Spring 4: Holder 4a: Slit 4b: Lock convex part 5: Split ring 6: C ring 7: Optical fiber 8: Housing 8a: Mating lock concave part 8b: Recess 9: Precision split sleeve 10: Bush

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiro Kodama 216 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Stock company Hitachi Totsuka Plant (72) Inventor Hiroo Izawa 216 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Ceremony company Hitachi Totsuka Plant (72) Inventor Kyoichi Iwasa 3-9-11 Midoricho, Musashino City, Tokyo Inside Nippon Telegraph and Telephone Corporation Electronic Engineering Laboratory (72) Inventor Nobuo Suzuki 1-2356 Takeshi, Yokosuka, Kanagawa Prefecture Address, Nippon Telegraph and Telephone Corporation, Second Communication Network Research Laboratories (72) Inventor Akio Gogawa 5-33-1 Shiba, Minato-ku, Tokyo Inside NEC Corporation (72) Inventor Takayuki Masuko Nakahara-ku, Kawasaki-shi, Kanagawa 1015 Kamiodanaka, Fujitsu Limited (56) References JP-A-60-179708 (JP, A) JP-A-57-74715 (JP, A) JP 59-36211 (JP, A) Actual opening 58-166606 (JP, U) Actual opening 59-134117 (JP, U) Actual opening 60-92209 (JP, U)

Claims (1)

[Claims] 1. An integrated part in which a small hole for inserting an optical fiber is provided at the center of a ferrule, and the ferrule is press-fitted into a substantially cylindrical hood having a convex portion for preventing rotation of the ferrule when the optical connector and an adapter are fitted together. A spring that secures a constant pressure during the fitting, and a holder that is spring-like by a slit provided in the outer peripheral part that is attached to the integral component side so as to be mounted on the outer peripheral part of the housing of the adapter when the fitting is performed. And an split ring attached to the outside of the holder to reinforce the springiness of the holder.