| 摘要 |
PROBLEM TO BE SOLVED: To reduce the cost and assembling trouble by coping with the case of selectively using two kinds of sub-printed circuit boards different in shape and size of a board part, and shape and loading method of a memory to be loaded using a common case including a support structure suitable for each sub-printed circuit board so that it is not necessary to provide two kinds of special cases for every sub-printed circuit board.SOLUTION: A printed circuit board unit includes: a main printed circuit board 101; sub-printed circuit boards 110, 120 having a removable connector attached and detached to and from a fixed side connector 105 and loaded with a memory; a case base 80 on which the bottom of each sub-printed circuit board is seated; and a case lid 70. The case base 80 is provided with a first support projection 83 for preventing a first sub-printed circuit board from shifting in the lateral direction and a second support projection for preventing it from shifting in the longitudinal direction. The second support projection 85 regulates the first sub-printed circuit board from moving in the longitudinal direction and also regulates a second sub-printed circuit board from moving in the lateral direction. |
