Drum Cartridge With Movable Electrical Contact Surface To Reduce Rubbing
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Solution Overview
Problem
The electrical contact surface of an IC chip on a drum cartridge experiences rubbing due to pressure during contact with the image-forming apparatus, leading to potential damage.
Innovation Solution
A drum cartridge design incorporating a resilient member, such as a coil spring, positioned between the electrical contact surface and the drum frame, which compresses to reduce the distance between them, minimizing pressure and preventing rubbing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrical contact surface is made to contact with the electrical contact to enable data communication, then the reliability of data transmission is improved, but rubbing occurs on the electrical contact surface due to pressure, leading to wear and potential damage
Solution Approach 1:
The holder is made movable relative to the drum frame, allowing the electrical contact surface to dynamically adjust its position. The resilient member enables the holder to move toward and away from the drum frame, creating a dynamic contact system that reduces static pressure and rubbing on the electrical contact surface while maintaining reliable electrical connection
Solution Approach 2:
The resilient member acts as an intermediary between the holder and the drum frame. It transmits force while providing cushioning, allowing the electrical contact surface to maintain contact with the electrical contact without direct rigid pressure, thereby reducing rubbing and wear while ensuring reliable data transmission
2Object-affected harmful factors
If a resilient member is introduced to reduce pressure on the electrical contact surface, then rubbing and wear are prevented, but the device complexity increases
Solution Approach 1:
The resilient member is implemented as a coil spring, a flexible mechanical component that provides the necessary cushioning and force transmission. This flexible element reduces rubbing on the electrical contact surface while adding minimal structural complexity to the drum cartridge assembly
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 resilient member effectively reduces pressure and prevents rubbing, ensuring reliable electrical contact while extending the lifespan of the IC chip and reducing wear.
Implementation Method 1
The resilient member is configured to expand and compress in a second direction crossing the electrical contact surface between a first state and a second state
Data Source
AI summary
A drum cartridge includes: a drum frame to which a developing cartridge is attachable; a photosensitive drum rotatable about an axis extending in a first direction; a memory having an electrical contact surface; and a resilient member positioned between the electrical contact surface and the drum frame. The resilient member is configured to expand and compress in a second direction crossing the electrical contact surface between a first state and a second state, the resilient member having a shorter length in the second state than in the first state. A distance between the drum frame and the electrical contact surface in the second direction when the resilient member is in the second state is smaller than a distance between the drum frame and the electrical contact surface in the second direction when the resilient member is in the first state.