Cover Glass Cleaning Mechanism Using Cartridge Attachment Lock
Solution Overview
Problem
In electrophotographic image forming apparatuses, toner and dust accumulation on the cover glass of the optical device can block the light path, leading to reduced image density or lack of image, and existing cleaning methods require manual operation that risks damaging the cover glass.
Innovation Solution
An image forming apparatus with a cleaning member that can be held at a fixed position before cleaning and operates in conjunction with the attachment of a cartridge, featuring a lock member that prevents accidental movement until the cartridge is attached, allowing the cleaning member to move from a start to an end position to clean the cover glass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual cleaning method is used, then cleaning can be performed, but the risk of damaging the cover glass increases and operation becomes complex
Solution Approach 1:
The cleaning member automatically performs cleaning without requiring manual operation. The cleaning member is moved automatically by the attachment/detachment of the unit, eliminating the need for users to manually slide the cleaning member across the cover glass, thus preventing damage while maintaining cleaning effectiveness.
Solution Approach 2:
The manual mechanical sliding operation is replaced by an automatic mechanical system driven by the unit attachment/detachment mechanism. The lock member and urging member work together to convert the mechanical action of unit attachment into automatic movement of the cleaning member, eliminating manual intervention.
2Productivity
If cleaning member is always movable, then cleaning can be performed, but accidental movement may occur causing damage
Solution Approach 1:
The cleaning member transitions between fixed and movable states dynamically. The lock member locks the cleaning member at the start position when the unit is not attached, and unlocks it when the unit is attached, allowing automatic movement only when needed for cleaning.
Solution Approach 2:
The lock member prevents accidental movement by locking the cleaning member at the start position before the unit is attached. This preliminary constraint prevents harmful actions while allowing the cleaning function to operate when the unit is properly attached.
3Extent of automation
If automatic cleaning is implemented, then manual operation is eliminated, but device complexity increases
Solution Approach 1:
The cleaning function is merged with the unit attachment/detachment operation. The same mechanical action that secures the unit also triggers the cleaning member movement, eliminating the need for separate control mechanisms and reducing overall system complexity.
Solution Approach 2:
The lock member serves multiple functions: it locks the cleaning member at the start position, unlocks it during unit attachment, and works with the urging member to control movement. This multi-functionality reduces the need for additional components.
Data Source
AI summary
An image forming apparatus including a cartridge that has a photosensitive drum and can be attached to and detached from a main body of the image forming apparatus, an optical device that has a cover glass through which light emitted toward the photosensitive drum passes, a cleaning member that can move from a cleaning start position to a cleaning end position for cleaning the cover glass, and a lock member that prevents the cleaning member from moving. Before the cartridge is attached, the lock member prevents the cleaning member from moving in the longitudinal direction of the cover glass. During the attachment of the cartridge, the cartridge engages with the lock member and unlocks the cleaning member and enables the cleaning member to move from the cleaning start position.