Abstract: A high-frequency coil device can maintain a distance between coils at any mounting position in an RF coil including a movable coil unit and can achieve a uniform sensitivity distribution and high sensitivity. A first coil unit configured to move along a substantially circular trajectory and a second coil unit fixed within the substantially circular trajectory are provided, the first coil unit and the second coil unit are disposed at substantially point-symmetric positions, and magnetic coupling between conductor loops provided in both the coil units is maintained substantially constant in a movable range of the first coil unit.

Abstract: A coin dispensing machine includes: a bucket for storing a plurality of coins, a rotation disk being placed on the bottom of the bucket and formed with a plurality of openings for accepting the coins, a drive unit for dispensing the coins accepted in the openings sequentially by rotating the rotation disk, and an overload preventing device for preventing excessive load from being imposed on the drive unit.