Ink Cartridge Circuit Board Layout to Prevent Contact Ink Scatter
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Solution Overview
Problem
Ink cartridges with circuit boards positioned obliquely below the ink leading out part risk ink scatter during insertion or removal, potentially causing conduction failures due to ink adherence on the circuit board contacts.
Innovation Solution
The circuit board is positioned further away from the supply port than the bottom surface of the liquid container, using a circuit board holder to maintain this separation and reduce ink adherence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the circuit board is positioned obliquely below the ink leading out part, then the space utilization is improved, but the reliability of electric contact is worsened due to ink scatter during insertion or removal
Solution Approach 1:
The circuit board is extracted from the conventional position below the ink leading out part and relocated to the bottom surface of the liquid container. This spatial extraction eliminates the circuit board from the ink scatter zone, preventing ink from adhering to the circuit board contacts during insertion or removal operations.
Solution Approach 2:
The circuit board position is changed from a vertical arrangement (below the ink leading out part) to a horizontal arrangement (at the bottom surface). This dimensional repositioning moves the circuit board to a different spatial plane that is inherently protected from ink scatter, which occurs in the vertical direction near the supply port.
2Device complexity
If the circuit board is positioned closer to the supply port, then the device complexity is reduced, but the harmful effect of ink adherence increases
Solution Approach 1:
The bottom surface of the liquid container serves as an intermediary protective layer between the supply port and the circuit board. By positioning the circuit board at the bottom surface, the container structure itself acts as a barrier that prevents ink scattered from the supply port from reaching the circuit board contacts.
Data Source
AI summary
There is provided a liquid storing cartridge including: a casing which has a bottom surface and which is configured to store a liquid, the casing having a supply port configured to supply the liquid from the casing to an outside of the casing; a circuit board having an electric contact; and a circuit board holder which is provided on the casing and which is configured to hold the circuit board. The circuit board is provided at a position being more apart from the bottom surface of the casing than the supply port is.