Print Cartridge Mechanical Keys for Wrongful Insertion
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Solution Overview
Problem
Improper insertion of print cartridges into inkjet printing systems can lead to harmful interactions, causing operational issues and potential damage.
Innovation Solution
The implementation of a print cartridge identification system with mechanical combination keys, including a family key and a fluid key, which provide corresponding positive and negative physical features on the cartridge and carriage to ensure proper alignment and prevent wrongful insertion by allowing only correctly identified cartridges to establish electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a print cartridge identification system with mechanical combination keys is implemented, then reliability is improved by preventing wrongful insertion, but device complexity increases due to additional mechanical features
Solution Approach 1:
The patent applies asymmetry by providing different mechanical key features (protrusions and recesses) on the carriage versus complementary features on the print cartridge. The carriage has a first mechanical key with specific protrusions and a second mechanical key with specific recesses, while the print cartridge has corresponding recesses and protrusions respectively. This asymmetric design ensures that only cartridges with matching features can be properly inserted, preventing wrongful insertion while maintaining system reliability.
2Object-affected harmful factors
If mechanical combination keys are used for identification, then harmful factors are reduced by preventing improper cartridge-function associations, but manufacturing complexity increases
Solution Approach 1:
The patent segments the identification system into two separate mechanical keys: a first mechanical key on the carriage with protrusions, and a second mechanical key on the carriage with recesses. The print cartridge correspondingly has recesses for the first key and protrusions for the second key. This segmentation allows each key feature to be manufactured independently and precisely, reducing the overall manufacturing complexity while still providing robust protection against improper insertion.
Data Source
AI summary
A print cartridge identification system includes a housing, a family key provided on one side of the housing to identify an associated printer of the print cartridge, a fluid key provided on the one side of the housing to identify a property of fluid in the print cartridge, and a location datum provided on the one side of the housing to position the print cartridge in the associated printer.