| 发明名称 | Image forming apparatus | ||
| 摘要 | An image forming apparatus includes a developing unit for accommodating a developer, a rotatable member, rotatable in the developing unit, for stirring the developer, and a pressure-detecting portion for detecting a pressure applied by the rotatable member and for outputting a voltage signal corresponding to the pressure. The pressure-detecting portion is provided on the wall surface perpendicular to the rotational axis direction of the rotatable member in the developing unit. In addition, a discriminating portion discriminates an amount of the developer in the developing unit on the basis of a change in the voltage signal outputted from the pressure-detecting portion. | ||
| 申请公布号 | US9268254(B2) | 申请公布日期 | 2016.02.23 |
| 申请号 | US201213991952 | 申请日期 | 2012.03.02 |
| 申请人 | Canon Kabushiki Kaisha | 发明人 | Monde Masafumi;Tsuchiya Toshikazu;Hanamoto Hidetoshi;Ishida Tsutomu |
| 分类号 | G03G15/08 | 主分类号 | G03G15/08 |
| 代理机构 | Fitzpatrick, Cella, Harper & Scinto | 代理人 | Fitzpatrick, Cella, Harper & Scinto |
| 主权项 | 1. An image forming apparatus comprising: a developing unit for accommodating a developer; a rotatable member, rotatable in said developing unit, for stirring the developer; a pressure-detecting portion for detecting a pressure applied by said rotatable member and for outputting a voltage signal corresponding to the pressure, wherein said pressure-detecting portion is provided on a wall surface perpendicular to the rotational axis direction of said rotatable member in said developing unit; and a discriminating portion for discriminating an amount of the developer in said developing unit on the basis of a change in the voltage signal outputted from said pressure-detecting portion, wherein when the amount of the developer discriminated by said discriminating portion is not more than a predetermined amount, sensitivity of said pressure-detecting portion is switched. | ||
| 地址 | Tokyo JP | ||