Developer Housing Recess for Waste Toner Dispersion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrophotographic image forming apparatuses face challenges in preventing toner leakage and ensuring secure attachment and detachment of developer units, as well as efficient waste toner management during the image formation process.
Innovation Solution
A developer unit with a housing comprising a lower frame, upper frame, and waste toner container, featuring a recessed portion to disperse waste toner and a waste toner transporting member that moves back and forth to transfer waste toner from the cleaning unit to the storage area, along with a customer replaceable unit monitor for authentication and encrypted communication, and a blocking member to secure the toner supply window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a waste toner container is added to the developer unit, then waste toner management is improved, but the device complexity increases
Solution Approach 1:
The waste toner container is integrated into the developer unit housing, combining the waste toner storage function with the existing developer unit structure. This merging approach improves waste toner management while minimizing the increase in overall device complexity by utilizing existing structural space rather than adding a completely separate system.
Solution Approach 2:
The housing structure serves multiple functions: it contains the developer components, provides structural support, and incorporates the waste toner container. This multi-functionality allows the same structural elements to serve both original developer unit purposes and waste toner management, reducing the need for additional dedicated components.
2Ease of operation
If a recessed portion is added to disperse waste toner, then waste toner dispersion is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The recessed portion is strategically positioned in the upper frame to specifically address waste toner accumulation in that local area. By concentrating the dispersion function in a specific localized region rather than requiring uniform modifications throughout the entire housing, the design improves waste toner dispersion while limiting the scope of precision manufacturing requirements to only the critical recessed area.
3Reliability
If a blocking member is added to secure the toner supply window, then toner leakage prevention is improved, but the ease of operation decreases
Solution Approach 1:
The blocking member is pre-positioned within the housing structure to automatically secure the toner supply window when the developer unit is assembled. This preliminary positioning ensures that the toner leakage prevention mechanism is already in place before the unit is installed, eliminating the need for additional user actions to activate the security feature while maintaining ease of operation during installation and removal.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A developer of an image-forming apparatus includes a photoconductor (1), a housing (90) comprising a waste toner container (20) in which waste toner removed from the photoconductor (1) is contained, and a recessed portion (40) depressed downwardly in a center portion of an upper wall of the waste toner container (20), the center portion corresponding to a center portion of the photoconductor (1) in a lengthwise direction to move toner away from the center portion.