Patent ID: 11934111
Assignee: KYOCERA DOCUMENT SOLUTIONS INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A developing device, comprising:
a development container that stores a developer that includes a toner;
a stirring-conveying member that is forwardly and reversely rotatable and includes a rotation shaft and a conveying blade integrally formed with the rotation shaft, and that stirs and conveys the developer in the development container;
a toner detection sensor that detects a toner concentration or a toner remaining amount in the development container; and
a scraper that is attached to the stirring-conveying member and that is caused to clean a detection surface of the toner detection sensor by rotation of the stirring-conveying member,
the scraper including a first member that contacts the detection surface of the toner detection sensor during forward rotation of the stirring-conveying member, and a second member that contacts the detection surface of the toner detection sensor during reverse rotation of the stirring-conveying member,
the first member being more wear resistant than the second member, with a coefficient of friction between the second member and the detection surface being higher than a coefficient of friction between the first member and the detection surface,
wherein
the stirring-conveying member includes a scraper holder that is formed so as to divide part of the conveying blade, and that holds the scraper along inclination of the conveying blade; and
the scraper holder includes
a first holding portion that is arranged on one side of the conveying blade divided and that includes a pair of first holding pieces that hold one side-end portion of the scraper therebetween, and
a second holding portion that is arranged on another side of the conveying blade divided and that includes a pair of second holding pieces that hold another side-end portion of the scraper therebetween.