Segmented Printed Substrates for Liquid Ejection Cartridge Electrical Contacts
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Solution Overview
Problem
The high unit cost of inkjet recording apparatus cartridges is due to the large size of printed substrates required for the electrical contact section, which is formed on a single substrate, increasing the overall cost of the cartridge.
Innovation Solution
A liquid ejection cartridge design featuring two separate printed substrates arranged on the same surface, with one substrate handling driving signals and the other handling ink tank information signals, reducing the size and cost of each substrate and improving electrical reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single large printed substrate is used for the electrical contact section, then all electrical connections can be integrated, but the unit cost increases due to the large substrate size
Solution Approach 1:
The electrical contact section is divided into multiple separate printed substrates instead of using a single large substrate. Each substrate handles specific electrical connections (e.g., one substrate for ground connections, another for signal connections), reducing the area and cost of each individual substrate while maintaining overall electrical reliability through distributed contact points across multiple substrates.
2Device complexity
If a single large printed substrate is used, then structural simplicity is maintained, but the substrate size and cost increase
Solution Approach 1:
The single large substrate is segmented into multiple smaller substrates that are arranged in a distributed pattern. This segmentation reduces the area of each individual substrate while the overall arrangement maintains the necessary electrical connection structure. The multiple substrates can be positioned at different locations to optimize electrical performance without requiring one large continuous substrate.
3Ease of manufacture
If multiple printed substrates are used, then substrate cost is reduced, but electrical connection reliability may be compromised
Solution Approach 1:
Multiple separate printed substrates are combined in a distributed arrangement where each substrate contributes to the overall electrical connection system. The substrates work together as an integrated electrical contact section, with each substrate handling specific connections. This merging of multiple smaller substrates achieves the cost benefits of smaller individual substrates while maintaining the reliability of comprehensive electrical coverage through their combined effect.
Data Source
AI summary
A liquid ejection cartridge having a liquid ejection section for ejecting liquid includes an electrical contact section to be electrically connected to a terminal section of an apparatus main body, the electrical contact section being formed by a plurality of printed substrates arranged on a same surface.