Photosensitive Cartridge Light Guide Orthogonal Design
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Solution Overview
Problem
Existing electrophotographic image forming devices face challenges in compact design due to the need for a light source to be arranged immediately rightward of a light guide, which restricts the reduction of the printer's size in the left-right direction.
Innovation Solution
A photosensitive cartridge with a guide member that includes a first part to receive light, a second part facing the photosensitive drum, and a third part to allow light to pass through, enabling the light to be directed orthogonally and efficiently neutralize residual charge on the drum, thus allowing for a more compact axial design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the light source is arranged immediately rightward of the light guide, then light can effectively enter the light guide through the right endface, but the printer size in the left-right direction cannot be reduced
Solution Approach 1:
The light guide is configured to receive light from the right endface and guide it to the left endface, utilizing the axial direction (front-rear dimension) rather than requiring the light source to be positioned immediately rightward. This dimensional change allows the light source to be arranged in the front-rear direction, enabling compact design in the left-right direction while maintaining effective light guidance.
2Reliability
If light is guided to neutralize residual charge on the photosensitive drum, then image formation quality is improved, but the device complexity increases
Solution Approach 1:
The light guide is divided into multiple sections with distinct functions: the right endface receives light, the body guides light axially, and the left endface emits light onto the photosensitive drum. This segmentation allows each part to perform its specific function efficiently, achieving reliable charge neutralization while keeping the overall structure relatively simple and modular.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for a more compact printer design in the axial direction by efficiently removing residual charge from the photosensitive drum without interfering with the formation of electrostatic latent images, enhancing image formation quality and reducing the printer's size constraints.
Implementation Method 1
light emitted from the light source enters the light guide through the right endface of the light guide and then is guided by the light guide to be irradiated onto the surface of the photosensitive drum
Implementation Method 2
This light removes any residual charge from the surface of the photosensitive drum
Data Source
AI summary
A photosensitive cartridge includes a photosensitive drum, and a guide member. The guide member is configured to guide light emitted from the light source toward a surface of the photosensitive drum to neutralize charge on the surface of the photosensitive drum. The guide member includes a first part, a second part, and a third part. The first part is configured to receive the light. The first part extends in a direction intersecting an axial direction of the photosensitive drum. The second part faces the photosensitive drum and extends in the axial direction. The third part connects the first part and the second part. The third part is configured to allow the light to pass through the first part toward the second part.