| 摘要 |
PURPOSE:To prevent an ambient humidity from invading the inside of a case by a simple constitution, by stuffing an adhesive agent into a fitting part between the case and a cover, and also performing a coating to a fitting part between the case and an optical member inserted into the inside, and closing it up tightly. CONSTITUTION:An upper opening part 10' of a case 10 is provided on an external projecting position of a fiber core wire 4, and an upper projecting part 10'' is formed. A lower projecting part 11'' is formed in an inside position of the projecting part 10'' of a lower opening part 11' of a cover 11. Subsequently, an adhesitve agent 12 formed by an epoxy resin mixed with a powder made of aluminum, etc. is stuffed between the projecting part 10'' and 11''. As for a holder 13, the core wire 4 is penetrated in the inside peripheral surface, a groove 13'' is formed so as to have a gap in the tip of each projecting part 10'', 11'', on the outside peripheral surface, and the part between this groove 13'' and the tip of two projecting parts 10'', 11'' is coated with rubber 14. Accordingly, the case 10 and the cover 11 are sealed up tightly by the adhesive agent 12, and the penetrating part of the core wire 4 of the case 10 and the cover 11 is closed up tightly by the rubber 14. Therefore, an optical circuit in the case and the cover is cut off from the outside, and a bad influence caused by humidity from the periphery of the optical circuit can be prevented. |
