Canon Kabushiki Kaisha

Chiharu Kageyama

Hiroyuki Takahashi

Takuya Matsumura

Masaki Kakitani

Rin Ishikawa

A first sound absorbing member is disposed outside a fan connecting duct connected to an image-formation exhaust fan. The first sound absorbing member includes a first-layer perforated plate having a plurality of sound absorbing holes and a second-layer sound absorbing sheet covering the plurality of sound absorbing holes. The first sound absorbing member provides the effect of reducing airflow noise generated by the operation of the image-formation exhaust fan. When part of the airflow noise passes through the sound absorbing holes of the first-layer perforated plate, part of the sound energy is converted to thermal energy, thereby reducing the airflow noise. Part of the sound energy of the sound that has passed through the sound absorbing holes is further converted to thermal energy by the second-layer sound absorbing sheet, thereby further reducing the airflow noise. The first sound absorbing member may be disposed in a small space.

Duct unit and image forming apparatus

An exhaust duct provided on a back surface side of an image forming apparatus, and including a plurality of air ducts through which air inside the apparatus is exhausted toward outside the apparatus, a plurality of filters provided in the plurality of air ducts, respectively, and which removes a fine particle included in the air exhausted through the air ducts, and a filter case that houses the plurality of filters in a manner that the filters are able to be taken out from the filter case are included, and the filter case is provided in a drawable manner to one of side surface sides in a right and left direction or to an upper surface side in an up and down direction of the image forming apparatus, from a front surface side to a back surface side of the image forming apparatus, with respect to the image forming apparatus.

Growing community of inventors

Ryugasaki, Japan

Chiharu Kageyama