Developing Cartridge Conductive Switching for Quiet Detection
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Solution Overview
Problem
Existing developing cartridges in imaging devices require complex transmission mechanisms, leading to increased size and mechanical noise during detection, hindering miniaturization and user experience.
Innovation Solution
A developing cartridge design featuring a conductive assembly with an elastically deformable electrical connection portion and a voltage control member that switches between connected and disconnected states, simplifying the structure and reducing mechanical noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a first drive force receiving member and detectable device with transmission mechanisms are used, then the developing cartridge can be detected for information such as new product status, size, and capacity, but the structure becomes complex and the cartridge size increases
Solution Approach 1:
The patent extracts the complex transmission mechanisms from the detection system and replaces them with a simplified direct detection approach. The detectable device directly detects the rotation of the first drive force receiving member without requiring intermediate transmission components, thereby reducing structural complexity while maintaining detection functionality.
Solution Approach 2:
The first drive force receiving member serves multiple functions: it is both the object to be detected (indicating cartridge installation and rotation status) and the driving component for the developing roller. This multi-functionality eliminates the need for separate detection mechanisms, reducing overall structure complexity.
2Measurement precision
If transmission mechanisms are used to connect the first drive force receiving member and detectable device, then detection functionality is achieved, but mechanical collision noise is generated during detection
Solution Approach 1:
The patent replaces the mechanical transmission system with a direct magnetic coupling detection system. The detectable device uses magnetic fields to detect the rotation of the first drive force receiving member without physical contact, thereby eliminating mechanical collision noise while maintaining detection capability.
3Measurement precision
If numerous transmission mechanisms are used in the detectable device, then detection of developing cartridge information is enabled, but miniaturization of the cartridge is impeded
Solution Approach 1:
The patent merges the detection function directly into the first drive force receiving member structure. The detectable device is integrated with the drive force receiving member, eliminating the need for separate transmission mechanisms and reducing the overall cartridge volume, thereby enabling miniaturization.
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
Facilitates miniaturization of the developing cartridge and improves user experience by reducing mechanical noise and complexity in the detection process.
Implementation Method 1
the first electrical connection portion is elastically deformable, the imaging device further comprises an openable door, the door has a groundable first inner wall, and the first electrical connection portion is configured to electrically contact the first inner wall
Data Source
AI summary
A developing cartridge is detachably installable in a main assembly of an imaging device, the imaging device includes a detection device and a grounding terminal. The developing cartridge includes a developing frame, a developing roller, a first drive force receiving member, a first end cover, a conductive assembly, and a first voltage control member. The conductive assembly is capable of electrically connecting the detection device and the grounding terminal. The first voltage control member is configured to move between a first position and a second position in response to an external force, wherein when the first voltage control member is in the first position, the detection device and the grounding terminal are electrically connected, and when the first voltage control member is in the second position, the detection device and the grounding terminal are not electrically connected.