| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of being unable to reduce the spacing between printed boards, because the extremities of clamp means for mounting a housing tray on the printed board are protrude extensively from the underside of the printed board and interfere with the adjacent printed board. SOLUTION: A subscriber relay station apparatus has a printed board 3 which contains electronic components, is provided with a housing tray 5 for housing the excessive length of an optical fiber cable 4 and is detachably placed in a case 1. Plural clamp means 12 are protruded from the bottom of the housing tray 5, in such a way that their elastically deformable hinges are located on the side of the top of the printed board 3 and are inserted into mounting holes 3a, formed in the printed board 3 with their extremities engaged on the underside of the printed board 3. In this way, the extremities of the clamp means 12 will not protrude extensively form the underside of the printed board 3. |
