Patent ID: 8861991
Filing Date: 2014-10-14
Classification: G03G

Abstract:
1. A development device comprising: a development housing; a first developer conveyance member disposed in the development housing to transport by rotation developer contained in the development housing; a developer bearer to carry by rotation the developer contained in the development housing to a development range facing a latent image bearer; and a developer amount detector to detect an amount of the developer contained in the development housing, the developer amount detector including, wherein at least one of the second end of the first light guide and the first end of the second light guide is stationary, wherein the second end of the first light guide and the first end of the second light guide are arranged in an axial direction of the first developer conveyance member, forming a light transmission path therebetween, and wherein at least a part of the light transmission path is positioned inside a locus of rotation of the first developer conveyance member.