PROBLEM TO BE SOLVED: To provide a housing mechanism having superior maintenance property of various types of boards mounted with various types of incorporated electronic components and capable of reducing the restriction of assembling procedures of the various types of boards and the housing mechanism of an ultrasonic observation apparatus.SOLUTION: This housing structure is characterized in that a plurality of circuit boards are detachably fixed to be layered in parallel to a housing and having at least one circuit board detachably fixed along a different direction from the superposed direction.COPYRIGHT: (C)2009,JPO&INPIT【課題】 内蔵される各種電子部品が実装された各種基板のメンテナンス性に優れ、且つこれら各種基板の組み立て手順の制約を低減させることのできる筺体機構、及び超音波観測装置の筺体機構の実現。【解決手段】 本発明の筐体構造は、複数の回路基板が筐体に対して、着脱自在に平行に積層固定され、上記積層方向とは異なる方向に沿って着脱自在に固定される少なくとも1つの回路基板を備えたことを特徴とする。【選択図】 図5
