US 11,835,887 B2
Developer accommodating device with screw including screw blade as rotator, developing device, process cartridge, and image forming apparatus
Yuuki Tsuchiya, Kanagawa (JP); Yoshihiro Fujiwara, Kanagawa (JP); Tomohiro Kubota, Kanagawa (JP); Shuntaroh Tamaki, Kanagawa (JP); and Ryusuke Mase, Kanagawa (JP)
Assigned to RICOH COMPANY, LTD., Tokyo (JP)
Filed by Yuuki Tsuchiya, Kanagawa (JP); Yoshihiro Fujiwara, Kanagawa (JP); Tomohiro Kubota, Kanagawa (JP); Shuntaroh Tamaki, Kanagawa (JP); and Ryusuke Mase, Kanagawa (JP)
Filed on May 24, 2022, as Appl. No. 17/751,673.
Claims priority of application No. 2021-097116 (JP), filed on Jun. 10, 2021.
Prior Publication US 2022/0397841 A1, Dec. 15, 2022
Int. Cl. G03G 15/08 (2006.01)
CPC G03G 15/0891 (2013.01) [G03G 15/0898 (2013.01); G03G 2215/083 (2013.01); G03G 2221/1648 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A developer accommodating device, comprising:
a rotator including a rotation shaft including a resin material;
a collar including a metal material and configured to rotate together with the rotation shaft; and
a bearing rotatably supporting the rotation shaft via the collar,
the collar including:
a collar main portion having a first outer diameter and configured to be in sliding contact with the bearing; and
a flange portion closer to a center of the rotator in an axial direction of the rotator than the collar main portion, the flange portion having a second outer diameter greater than the first outer diameter of the collar main portion,
wherein the rotator is a screw and further includes a screw blade spirally wound around the rotation shaft, and
wherein the second outer diameter of the flange portion is equal to or greater than an outer diameter of the screw blade.