A structure includes: a first component having a band-like shape and an elasticity for bending the first component in a first direction such that both ends of the first component approach each other; and a second component, coupled to the first component in a manner that the second component pivots about a rotational axis that lies along an edge in a longitudinal direction of the first component, and having an elasticity for bending the second component in a second direction opposite to the first direction when the first component and the second component are unfolded about the rotational axis.