Developer containing device, image forming apparatus, and image forming system

摘要

A developer containing device is provided with a housing that includes a first housing section and a second housing section and that is configured to contain a developer. A protrusion provided on the first housing section and a recess provided in the second housing section are welded together through vibration welding in a state where the protrusion is fitted into the recess. An outer wall of the recess is thicker than an inner wall of the recess.