Developing Cartridge Detectable Rotary Member Alignment
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Solution Overview
Problem
Conventional developing cartridges in image forming apparatuses face challenges in accurately determining whether a new or used cartridge is mounted, especially when the detectable rotary member's position is not correctly aligned, leading to potential misidentification and operational issues during cartridge assembly and usage.
Innovation Solution
The developing cartridge incorporates a detectable rotary member with separate detectable and contact portions, allowing it to be rotated only when properly aligned, preventing premature rotation and ensuring accurate detection of the cartridge's status after assembly, thereby enhancing convenience and wear resistance while maintaining position accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the detectable rotary member is rotated during assembly checks to verify cartridge operation, then operational functionality can be tested, but the position accuracy of the detectable portion deteriorates leading to misidentification of cartridge status
Solution Approach 1:
The rotary member is segmented into two distinct functional portions: a contact portion that engages with the driving force output member during operation testing, and a detectable portion that maintains a fixed reference position for status detection. This segmentation allows the contact portion to rotate during assembly checks while the detectable portion remains stationary relative to the housing, preventing position accuracy deterioration and ensuring reliable cartridge status identification.
2Ease of operation
If the detectable rotary member is rotated during assembly checks, then operational functionality can be tested, but the reliability of cartridge status determination deteriorates due to position misalignment
Solution Approach 1:
The rotary member is divided into a contact portion for operational testing and a detectable portion for status determination. During assembly checks, the contact portion rotates to verify functionality while the detectable portion maintains its reference position, ensuring that operational testing does not compromise the reliability of status determination.
Solution Approach 2:
The contact portion acts as an intermediary that absorbs the rotational movement during assembly checks, protecting the detectable portion from position changes. This intermediary structure allows operational verification without affecting the reference position needed for reliable status determination.
3Device complexity
If the detectable rotary member structure is simplified to reduce complexity, then manufacturing cost decreases, but the ability to prevent premature rotation deteriorates
Solution Approach 1:
The rotary member is segmented into contact and detectable portions with distinct functions. The contact portion specifically engages with the driving force output member, creating a controlled engagement mechanism that prevents premature rotation while maintaining relatively simple overall structure. This segmentation provides built-in protection against premature rotation without requiring additional complex components.
Data Source
Figure 1
Figure 2A
Figure 2B~2C
AI summary
A developing cartridge (7) is provided. The developing cartridge includes a housing (13) which accommodates developer therein, a receiving member (45) which receives a driving force output member provided in an image forming apparatus, a developing roller (18) which rotates by the driving force received by the receiving member, and a detectable rotary member (50) including a detectable portion (72), which is a detection target to be detected by a detection member provided in the image forming apparatus, and a contact portion (73) which is provided away from the detectable portion. The detectable rotary member rotates from a retreat position to an initial position where the detectable rotary member is rotated by the driving force received by the receiving member, by the contact portion contacting an interference member (91) fixed in the image forming apparatus in a process of mounting the developing cartridge into the image forming apparatus.