Lead cartridge with an openable capping structure.

摘要

A lead cartridge (2) for a mechanical pencil is provided with an openable capping structure (10). The openable capping structure is joined to the open end, namely , the front end, of the lead cartridge (2) so as to engage the lead guide of the mechanical pencil when the lead cartridge is inserted in the mechanical pencil. The openable capping structure (10) opens a lead passage formed therein when engaged with the lead guide and closes the lead passage when separated from the lead guide, to prevent the leads contained in the lead cartridge falling out of the lead cartridge (2).