JPH01134314A - Optical connector - Google Patents

Abstract

PURPOSE:To obtain the connector which is reliable over a long period while precluding its corrosion due to moisture and water by providing a receptacle cover and a plug cover outside the optical connector and coupling the both together by screws through rubber O rings. CONSTITUTION:The receptacle covers 21 are fitted by screws to the case 11 of optical transmission equipment outside the receptacle 12 of a conventional optical connector. Further, the plug covers 22 and 23 are provided outside the plug 14. Then the plug cover 22 is coupled with the receptacle cover 21 by screws across the rubber O rings 24 and 25, and the plug cover 23 is fixed to the sheath of an optical cable 19. Consequently, even if an outdoor type optical transmitter and receiver is exposed to rain and wind, neither moisture nor water enters the equipment, so its corrosion is precluded and the equipment which is reliable over a long period is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is used in the field of optical communications using optical fibers.

Conventional technology Conventional optical transmission equipment is rarely used outdoors.
There was no optical connector suitable for outdoor use. FIG. 2 shows a conventional optical connector and an example of its attachment. There is a gap between the ferrule portions 6 of the receptacle 2 and the plug 4, so they are not in perfect contact with each other. Furthermore, the connection between the plug 4 and the fiber cord 8 is also not airtight. Therefore, when using the device outdoors, measures such as installing a large external case including the main body of the device to prevent rainwater etc. from directly hitting the optical connector have been taken.

Problems to be Solved by the Invention However, even in this case, although direct intrusion of rainwater could be prevented, intrusion of moisture etc. could not be prevented. There is also a problem in that rainwater hits the optical connector directly, and moisture and water enter the main body of the device through the gap between the ferrule and the receptacle, corroding the internal circuitry.

The present invention provides a waterproof optical connector in view of the above-mentioned prior art.

Means for Solving the Problems The present invention provides a receptacle cover and a plug cover on the outside of a conventional optical connector, and furthermore, in order to maintain the confidentiality of the receptacle cover and the plug cover, rubber material 0. It has a device that fits the ring.

Function: A receptacle cover is provided on the outside of the receptacle of a conventional non-waterproof optical connector, and a plug cover is provided on the outside of the plug, and the two are connected airtightly. Therefore, even if the device is installed outdoors, there is no intrusion of wind and rain.

In addition, the plug cover on the outside of the plug has the risk of cutting the fiber if external force is applied to the connection between the conventional plug and optical cord, but this plug cover and optical cord secure the external optical fiber cable even stronger. This serves to protect the fiber from pressure applied to the connection between the plug and the fiber optic cable.

Embodiment FIG. 1 shows an optical connector according to an embodiment of the present invention. 1
1 is the case of the optical transmission equipment, 12 is the receptacle part of the optical connector, 13 is the plug part of the optical connector inside the equipment, 14 is the plug part of the optical connector outside the equipment, and 15 is 7 of the plug 13.
16 is a ferrule portion of the plug 14; 17 is an optical fiber coupling between the plug 13 and the light emitting element or the light receiving element; 18 is an optical cord for external connection connected to the plug 14; 19 is a cover for the optical cord 18; optical cable coating,
For example, 2o is a laser diode, 21 is a receptacle cover, 22 is a part of a first plug cover constituting the plug cover, 23 is a part of a second plug cover, 24 is a rubber O-ring of the receptacle part, and 25 is a plug cover. This is a rubber O-ring.

When connecting an optical connector, first plug 1 inside the device.
3 is connected to the receptacle 12. This part is not exposed to outside air, so there is no need to consider waterproofing. Plug 14 is then connected to receptacle 12. Finally, connect the plug cover 22 to the receptacle cover.

The plug cover and part of the receptacle cover are kept airtight by an O-ring 24. Further, an O-ring 26 maintains airtightness between the plug cover 22 and the plug cover 23 inside the plug cover. In addition, case 11 and receptacle cover 21
There are no moving parts between the parts, so they are fixed in place with waterproof resin. Furthermore, since there is no moving part between the plug cover 22 and the optical cable 190, which is fixed, it is secured with waterproof tape.

By doing so, the receptacle 2 and the plug 4 are completely isolated from the outside, and moisture can be prevented from entering the device.

Effects of the Invention According to the present invention, even when an outdoor type optical transmitter/receiver is exposed to wind and rain, moisture does not enter the device, corrosion is prevented, and the device becomes highly reliable over a long period of time. It also prevents the pressure of thick, heavy optical cables from directly applying to the optical fiber cord, and protects the connection between the cable and the plug.

[Brief explanation of the drawing]

FIG. 1 is a schematic exploded configuration diagram of an optical connector according to an embodiment of the present invention, and FIG. 2 is a schematic exploded configuration diagram of a conventional optical connector. 12... Receptacle, 13... Plug (1), 14... Plug (2), 15...
... Ferrule (1), 16... Ferrule (2), 18... Optical cord, 19...
Optical cable, 21...Receptacle cover, 2
2...Plug cover (1), 23...
Plug cover (2), 24...Rubber 0 ring (1), 25...Rubber 0 ring? ). Name of agent: Patent attorney Toshio Nakao and 1 other person
2ffi

Claims (3)

[Claims] (1) A receptacle cover is provided on the outside of the receptacle of the optical connector attached to the waterproof case, a plug cover is provided on the outside of the first plug portion connected to the external connection optical cord, and the receptacle cover is The plug cover is tightly fixed to the waterproof case, and the plug cover is tightly fixed to the outer sheath of the connecting optical cable. After the receptacle part and the plug part of the inner optical connector are combined, the receptacle cover and the plug cover are screwed together. An optical connector that is characterized by its ability to be tightly coupled. (2) Claim 1, characterized in that a rubber O-ring is provided between the plug cover and the receptacle cover.
Optical connector described in section. (3) The optical connector according to claim 1, wherein a rubber O-ring is provided between the first plug cover and the second plug cover that constitute the plug cover.