Developer Cartridge Bridge Portions for Roller Positioning
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Solution Overview
Problem
Conventional developer cartridges lack sufficient strength and precision in positioning the developing roller and supply roller, leading to inconsistent image-forming results due to communication between the groove and through-hole in the left side wall.
Innovation Solution
A developing device design featuring a housing with bridge portions that separate openings for the rotational shafts of the developing and supply rollers, enhancing the structural integrity and precision of their positioning, including adhesive regions for secure fixation and elastic deformability to facilitate assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the groove and through-hole are formed in communication in the left side wall, then the assembly process is simplified, but the strength of the cartridge frame is insufficient
Solution Approach 1:
The left side wall opening is divided into two separate openings: a groove for the developing roller shaft and a through-hole for the supply roller shaft. This segmentation prevents direct communication between the two openings, thereby strengthening the cartridge frame while maintaining ease of assembly through dedicated pathways for each roller shaft.
2Ease of manufacture
If the groove and through-hole are formed in communication in the left side wall, then the manufacturing process is simplified, but the positioning precision of rollers is insufficient
Solution Approach 1:
By segmenting the left side wall into separate groove and through-hole structures, each opening provides dedicated positioning guidance for its respective roller shaft. The groove on the right side wall and the through-hole on the left side wall are positioned to receive and align the developing roller shaft and supply roller shaft respectively, ensuring precise roller positioning without the communication issue that would compromise structural integrity.
3Device complexity
If the groove and through-hole are formed in communication in the left side wall, then the structure is simpler, but the reliability of image-forming results is insufficient
Solution Approach 1:
The structural segmentation into separate groove and through-hole openings enhances the reliability of image-forming results by ensuring proper positioning and alignment of the developing roller and supply roller. This segmentation prevents structural weakness that would compromise the consistency and reliability of the developing process, while the overall structure remains relatively simple.
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
The enhanced structural design improves the strength of the developer cartridge and ensures accurate positioning of the rollers, resulting in consistent and reliable image-forming results while simplifying the assembly process and allowing for efficient maintenance.
Implementation Method 1
the main body covers the second rotational shaft and has an adhering region in which the main body is adhesively fixed to the second rotational shaft
Data Source
AI summary
In a developing device, a developing agent member has a first rotational shaft extending in a first direction. A supply member has a second rotational shaft extending in the first direction. A housing includes a first wall and a second wall. The first wall is formed with first and second openings. The second wall is formed with third and fourth openings. The first bridge portion separates the first opening and the second opening in the first wall. A second bridge portion separates the third opening and the fourth opening in the second wall. When projected in the first direction, the first rotational shaft is disposed in the first opening and the second rotational shaft is disposed in the second opening. When projected in the first direction, the first rotational shaft is disposed in the third opening and the second rotational shaft is disposed in the fourth opening.