| 摘要 |
A daisy wheel print element includes a hub unit which can be fixedly assembled on the shaft of a drive motor and a flat disc element which is assembled with the hub unit in an arrangement which allows the disc element to be inserted on and removed from the hub unit normal to the axis of the shaft of the drive motor. Very little space is required to insert or remove the disc element, which includes opposing guide members that are slidably received on opposite edges of a guide plate of the hub unit and a key or index lug which registers in a notch in the guide plate, as the projecting cylindrical nipple at the center of the disc element nests in the semi-circular cup of the hub unit. Opposing spring prongs bear against the circular periphery of the projecting nipple of the disc element driving it into tight registry with the cup of the hub unit, whereby each disc element assembled with the hub unit will have perfect registry therewith and there will be no relative movement between the hub unit and the disc element when so assembled.
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