Wrapped body

Abstract

This disclosure relates to preventing incorrect installation of the wound body on the support shaft. The wound body comprises a core (100) and a long strip of winding wound around the core (100). The core (100) has the shape of a hollow tube having one end (101) and the other end (111). The core (100) has a plurality of protrusions on one end (101) and the other end (111) respectively, which protrude from the inner circumferential surface (120) of the hollow tube. The number of protrusions on one end (101) is different from the number of protrusions on the other end (111).

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