Toner refill cartridge with extendable plunger

Abstract

A toner refill cartridge includes a main body including an inner space in which toner is received and a toner discharge portion through which the toner is discharged, a piston coupled to the main body to be movable in a first direction along the inner space and configured to push the toner to the outside of the main body through the toner discharge portion, a plunger configured to push the piston in the first direction, the plunger including a plurality of segment members. At least two adjacent segment members are switchable from a retraction state where the at least two adjacent segment members overlap each other in the first direction and an extension state where the at least two adjacent segment members extend in a second direction opposite to the first direction. A first locking portion locks the at least two adjacent segment members in the extension state.

Dependencies are inferred from the claim text.