PROBLEM TO BE SOLVED: To provide a magnetic field generating device that can endlessly rotate an extracorporeal permanent magnet in the same direction and has sufficient durability, and can suppress noise breakout in a radio signal transmitted from a capsule endoscope.SOLUTION: A magnetic field generating device 23 includes: a base part 230 a first shaft part 231 perpendicular to the base part and rotatable around the Z-axis a second shaft part 232 perpendicular to the base part and movable along the Z-axis an extracorporeal permanent magnet 23a a holding unit 233 for rotatably holding the extracorporeal permanent magnet around the Yc shaft, and rotating in conjunction with the first shaft part and changing the direction of the extracorporeal permanent magnet by transmitting the rotation of the first shaft part to the extracorporeal permanent magnet and a tilt mechanism 234 with one end connected to the extracorporeal permanent magnet, and moving along the Z-axis with the second shaft part and tilting the extracorporeal permanent magnet by rotating the extracorporeal permanent magnet around the Yc shaft, the tilt mechanism having a support pillar 252 for releasing the rotational movement of the holding unit to the second shaft part.SELECTED DRAWING: Figure 5COPYRIGHT: (C)2016,JPO&INPIT【課題】体外永久磁石を同一方向に無限に回転させることができ、十分な耐久性を有し、且つ、カプセル型内視鏡から送信される無線信号におけるノイズ発生を抑制することができる磁界発生装置を提供する。【解決手段】磁界発生装置23は、ベース部230と、該ベース部と直交し、Z軸回りに回転可能な第1軸部231と、ベース部と直交し、Z軸に沿って移動可能な第2軸部232と、体外永久磁石23aと、該体外永久磁石をYc軸回りに回転可能に保持すると共に第1軸部と連動して回転し、第1軸部の回転を体外永久磁石に伝達することにより体外永久磁石の向きを変化させる保持部233と、一端部が体外永久磁石に連結され、第2軸部と共にZ軸に沿って移動して体外永久磁石をYc軸回りに回転させることにより体外永久磁石を傾斜させる傾斜機構であって、第2軸部に対して保持部の回転運動を逃がす支持柱252を有する傾斜機構234とを備える。【選択図】図5
