PROBLEM TO BE SOLVED: To provide an X-ray tube device with a compact size and large capacity, capable of displacing a focusing point in the tube container.SOLUTION: The device includes a support structure 16 having a support by an X-ray tube support 12 inside the tube container 14 at a colliding position of electrons on a target 6 surface in an anode direction 2, and having a support in a range up to an end part of an outer surrounding apparatus 3 of an opposite direction to a connection position of the anode 2 and the outer surrounding apparatus 3 based on the above position, and to be offset by displacement of the anode 2 due to heat at the time of X-ray generation by expansion of the outer surrounding apparatus 3.COPYRIGHT: (C)2008,JPO&INPIT【課題】 焦点移動を管容器内で対策可能とし、小型大容量のX線管装置を提供する。【解決手段】 管容器14内部のX線管支持具12による支持を、陽極2方向でターゲット6表面の電子が衝突する位置、及び、その位置を基準とし陽極2と外囲器3の接続位置に対して反対方向の外囲器3端部までの範囲で支持し、前記外囲器3の膨張によりX線発生時の熱による陽極2の移動で相殺する支持構造16を有する。【選択図】 図2
