Apparatus accommodating copper foil

An apparatus, comprising:

• a copper foil wound on a core;
• an accommodation body defining an accommodation space configured to accommodate the copper foil;
• a first support portion coupled to the accommodation body;
• a second support portion coupled to the accommodation body and spaced apart from the first support portion;
• a first damper portion disposed on the first support portion on which a first side of the core rests;
• and
• a second damper portion disposed on the second support portion on which a second side of the core rests,
• wherein the first damper portion comprises:
• a first damper body coupled to the first support portion,
• a plurality of first damper protrusions protruding from the first damper body, and
• a plurality of first damper grooves formed in the first damper portion,
• wherein the plurality of first damper grooves is placed at an opposite side of the plurality of first damper protrusions in the first damper body, and
• wherein a part of the first damper portion other than the plurality of first damper grooves is coupled to the first support portion,
• wherein each first damper protrusion of the plurality of first damper protrusions is spaced apart from other first damper protrusions of the plurality of first damper protrusions in a first direction,
• wherein each first damper groove of the plurality of first damper grooves is spaced apart from other first damper grooves of the plurality of first damper grooves in a second direction,
• wherein the first support portion has a curved surface,
• wherein the first damper portion is disposed on the curved surface,
• wherein each first damper protrusion of the plurality of first damper protrusions extends along a thickness direction of the first support portion,
• wherein each first damper groove of the plurality of first damper grooves extends along a direction perpendicular to the thickness direction of the first support portion,
• wherein the thickness direction of the first support portion is parallel to the second direction,
• wherein a spacing of the first plurality of protrusions places a first protrusion of the first plurality of protrusions at a first distance from a second protrusion of the first plurality of protrusions, the second protrusion at a second distance from a third protrusion of the first plurality of protrusions, and the first protrusion at a third distance from the third protrusion,
• wherein the first protrusion is located on the damper body more centrally along the first direction than the second protrusion,
• wherein the second protrusion is located on the damper body more centrally along the first direction than the third protrusion,
• wherein the second protrusion is disposed between the first protrusion and the third protrusion, and no other protrusion of the first plurality of protrusions is disposed between the first protrusion and the third protrusion, and
• wherein the first distance is less than the second distance.