| 摘要 |
PURPOSE:To eliminate a danger of electric shock at the time of attaching or detaching an optical fiber, to improve the operability of attaching or detaching, and to reduce the contamination of a back board printed board by prohibiting the attachment or detachment of the optical fiber as long as the connection of a power line to a power source terminal base is not disconnected. CONSTITUTION:A power line is connected to a power source terminal base 3 in a state that the end of a connecting plate member 25A is inserted to a slit 31, the sliding motion of connecting fittings 25 is stopped by the line, the member 25A is engaged with the slit 31, and the opening/closing of a back door 20 is prevented. When the line is removed and a power source circuit in a housing is interrupted, the member 25A can be disconnected, the door 20 is opened, and an optical fiber can be detached or attached. Thus, a danger of an electric shock is eliminated at the time of attaching or detaching the optical fiber. Since the door 20 can be completely opened, the operability of detaching or attaching is improved, and since substantially all the face of the opening of the back face of the housing 1 is blocked by the door 20, it can prevent dusts or the like from invading and reduce the contamination of a back board printed substrate 10. |
