Developing Cartridge Electric Contact Surface Wear Reduction
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Solution Overview
Problem
The electric contact surface of developing cartridges can be scraped during attachment to image forming apparatuses or drawer units due to protruding parts, leading to frictional wear and potential connectivity issues.
Innovation Solution
A developing cartridge design featuring a holder movable along the electric contact surface and a pressure member that adjusts its position, with a coil spring providing an urging force to maintain contact while reducing friction, allowing the cartridge to be inserted and removed with minimized wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the developing cartridge is attached to the image forming apparatus or drawer unit, then the electric contact surface contacts the electrical connector for data transmission, but the electric contact surface is scraped against protruding parts causing frictional wear
Solution Approach 1:
The holder is designed to be movable in the first direction, allowing the electric contact surface to dynamically adjust its position. This movement enables the contact surface to follow the contour of protruding parts during attachment, reducing scraping and frictional wear while maintaining reliable electrical contact
Solution Approach 2:
The holder acts as an intermediary between the fixed casing and the electric contact surface. By allowing the holder to move independently, it mediates the interaction between the contact surface and protruding parts, absorbing mechanical stress and preventing direct scraping of the contact surface against sharp edges
2Ease of operation
If the holder is fixed relative to the casing, then the structure is simple, but the electric contact surface cannot avoid protruding parts during attachment
Solution Approach 1:
The holder is designed to be movable in the first direction through a simple spring mechanism. This dynamic capability allows the contact surface to automatically adjust during attachment without requiring complex control systems, improving ease of operation while adding only minimal structural complexity
Solution Approach 2:
The holder automatically adjusts its position through spring-driven movement during attachment and detachment operations. The system serves itself by using the natural insertion and removal motions to drive the holder's adjustment, eliminating the need for external actuators or complex control mechanisms
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
This design effectively reduces frictional wear on the electric contact surface, ensuring stable and consistent connectivity during attachment and detachment, thereby extending the cartridge's lifespan and maintaining reliable operation.
Implementation Method 1
a coil spring providing an urging force to maintain contact
Data Source
AI summary
A developing cartridge includes: a developing roller; a casing for accommodating therein developing agent; a storage medium including an electric contact surface; a holder movable along with the electric contact surface in a first direction crossing the electric contact surface, the holder being movable between a first position and a second position relative to the casing in the first direction; and a pressure member for pressing the holder while being moved in a second direction crossing the first direction when the holder is moved between the first position and the second position. A distance in the first direction between the electric contact surface and the pressure member when the holder is positioned at the first position is greater than a distance in the first direction between the electric contact surface and the pressure member when the holder is positioned at the second position.