Magnetic core housing and noise reduction device

A magnetic core housing made of a resin material, capable of housing a cylindrical magnetic core having a cavity extending in a direction of a central axis of the magnetic core, the magnetic core housing comprising:

• a first housing capable of housing a first core, the first core being one of two pieces of the magnetic core divided from each other on a plane along the central axis;
• a second housing capable of housing a second core, the second core being the other of the two pieces of the magnetic core divided from each other on the plane along the central axis;
• a hinge configured to connect the first and second housings with each other so that the first and second housings can be opened and closed with respect to each other;
• and
• a first metal spring disposed in the first housing and configured to apply a force toward the central axis to the first core when the first core is housed in the first housing, wherein
• the first metal spring includes a planar part and a pair of spring parts inclined from two ends of the planar part toward the central axis, the two ends of the planar part being two ends in the direction in which the central axis extends, and reinforcing parts for preventing the planar part from being bent due to the force transmitted from the pair of spring parts when the first core is housed in the first housing, the planar part having a rectangular shape,
• the reinforcing parts extending from two different ends of the planar part than the two ends from which the pair of spring parts extends, the reinforcing parts folded to form an L-shape in cross section,
• openings are formed at positions corresponding to the respective reinforcing parts of the first housing in a direction orthogonal to the central axis, and
• each of the reinforcing parts is inserted into a respective one of the openings of the first housing, so that each of the reinforcing parts is positioned.