Hub setting device.

摘要

A hub setting device for a hub (8) onto which a magnetic tape is wound with which the hub (8) can easily be attached to and removed from a rotary shaft (7) with substantially no play between the hub (8) and shaft (7) when engaged. A divided ring (10) is retained in a recess formed in a boss portion (1) of the shaft (7), and the ring (10) is urged radially outwardly by an elastic member such as a pair of elastic tubular members (4). An elastic retention member (5) is fitted around the divided ring (10), received completely within a recess (11) formed around the outer circumferential surface of the ring (10).