Magnetic body and drug delivery control device using magnetic body

A drug delivery control device comprising:

• a magnetic body, the magnetic body including:
• a neodymium magnet having a length, center, and longitudinal axis along the length and the center of the magnet;
• and
• a cover part attached to an edge of the magnet, wherein:
• the cover part comprises a material with high magnetic permeability that includes a permalloy,
• a ratio of a length to a radius of the cover part is 10:1 to 7:3, and
• a side surface of the cover part in a lengthwise direction is tapered toward a peak of the cover part centered on or about the longitudinal axis, the peak having a rounded shape, which extends from a starting point along the longitudinal axis of the cover part to an upper-most point along the longitudinal axis of the cover part,
• the cover part has a bottom surface that is adjacent the edge of the neodymium magnet, and
• a radius of the cover part at the starting point is between 1 mm and 30 mm, a height from the bottom surface of the cover part to the starting point is between 5 mm and 15 mm, and a height of the peak from the starting point to the upper-most point is approximately the same as the radius of the cover part at the starting point;
• a head including a support mechanism supporting the magnet of the magnetic body;
• and
• an XY direction slide drive mechanism and a Z direction slide drive mechanism connected to the support mechanism of the head that causes the head to operate along a projected region formed by an affected area with respect to a surface of a tissue,
• wherein the drug delivery control device applies a magnetic field from the magnetic body to the affected area where a magnetic drug is administered.