Movable Sheet Guide Layout for Cassette Feeding Accuracy
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Solution Overview
Problem
Existing image forming apparatuses face challenges in positioning the movable guide close to the cassette, which affects the efficiency and accuracy of sheet feeding.
Innovation Solution
The movable guide is supported by the apparatus main body and designed to move in a first direction, allowing it to be arranged closely to the cassette during mounting, guiding sheets from both the cassette and manual feeding units to the registration roller pair.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the movable guide is arranged on the apparatus main body at a position close to the cassette, then the sheet feeding efficiency and accuracy are improved, but the assembly tolerance issues and positioning difficulty increase
Solution Approach 1:
The movable guide is designed to be movable in the draw-out direction rather than fixed. When the cassette is drawn out, the movable guide moves together with it, automatically maintaining the optimal guiding position. This dynamic adjustment eliminates the need for precise fixed positioning and accommodates assembly tolerances effectively while ensuring consistent sheet feeding performance.
Solution Approach 2:
The movable guide acts as an intermediary element between the cassette and the sheet feeding path. It is positioned on the apparatus main body but moves with the cassette, serving as a flexible mediator that adapts to positioning variations and ensures smooth sheet transition from the cassette to the feeding mechanism.
2Measurement precision
If the movable guide is arranged closely to the cassette on the apparatus main body, then the sheet guidance accuracy is improved, but the complexity of the guide support structure increases
Solution Approach 1:
The movable guide serves multiple functions: it guides sheets from the cassette, moves with the cassette during draw-out, and automatically adjusts its position to maintain optimal guidance. This multi-functionality is achieved through a simple movable structure rather than a complex fixed positioning system, reducing overall structural complexity while improving guidance accuracy.
3Device complexity
If the movable guide is fixed on the apparatus main body, then the structure is simpler, but the guide cannot be arranged closely to the cassette and sheet feeding performance deteriorates
Solution Approach 1:
The movable guide is designed to be movable in the draw-out direction rather than fixed. When the cassette is drawn out, the movable guide moves together with it, automatically maintaining the optimal guiding position. This dynamic adjustment eliminates the need for precise fixed positioning and accommodates assembly tolerances effectively while ensuring consistent sheet feeding performance.
Data Source
AI summary
A sheet feeding device includes an device main body, a cassette including an accommodating portion configured to accommodate sheets, which is mounted on the device main body to be drawable in a draw-out direction from a housed position, a feeding unit configured to feed a sheet accommodated in the accommodating portion to a downstream side in the draw-out direction, and a movable guide configured to guide the sheet fed by the feeding unit, the movable guide being supported by the device main body to be movable in a first direction, the movable guide being arranged on a downstream side of the accommodating portion in the draw-out direction in a state where the cassette is located at the housed position. In a process of mounting the cassette on the device main body, the movable guide is moved in the first direction by the cassette.