Printing Cartridge Keying Structure for Correct Mounting Recognition
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Solution Overview
Problem
Existing technologies do not allow operators to immediately recognize if a cartridge is correctly positioned during mounting, leading to potential operational issues.
Innovation Solution
A cartridge design featuring a key member that engages with specific engagement portions on the case, allowing immediate recognition of correct positioning through engagement or misalignment with recesses, and preventing unintended removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a transparent window is used in the apparatus to allow visual recognition of cartridge position, then the operator can recognize correct positioning, but the recognition is delayed until after mounting and does not prevent incorrect installation
Solution Approach 1:
The key member is designed with a contact surface that makes contact with the engagement portion during the insertion process itself, before the cartridge is fully mounted. This preliminary contact provides immediate tactile feedback about correct positioning, eliminating the need to wait until after mounting to discover positioning errors.
Solution Approach 2:
The contact surface on the key member acts as an intermediary between the cartridge and the engagement portion, providing direct tactile feedback during insertion. This intermediary mechanism translates positional accuracy into immediate tactile sensation, allowing the operator to detect correct or incorrect positioning in real-time during the mounting process.
2Ease of operation
If no engagement mechanism is provided, then the cartridge can be easily removed, but unintended removal or dislodgment may occur
Solution Approach 1:
The engagement mechanism is segmented into distinct components: the key member on the cartridge and the corresponding engagement portion with a recess in the case. This segmentation allows the cartridge to be easily inserted and removed by the operator while simultaneously providing a reliable mechanical interlock that prevents unintended dislodgment during normal operation.
3Device complexity
If the key member is positioned without precise association with printing agent type, then the cartridge structure is simpler, but correct engagement with the case cannot be ensured
Solution Approach 1:
The key member serves multiple functions: it provides the tactile contact surface for position recognition, acts as a mechanical key for engagement with the corresponding recess in the case, and its position associates with the type of printing agent stored in the chamber. This multi-functionality reduces the need for separate positioning structures while ensuring manufacturing precision.
Data Source
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AI summary
A cartridge configured to be inserted in a first direction into a case having a plurality of engagement portions is provided. The cartridge has a body and a key member. The body has a chamber for storing a printing agent. The key member is located on the body at a position associated with a type of the printing agent stored in the chamber and is configured to engage with a corresponding one of the plurality of engagement portions of the case. The key member has a surface facing a second direction opposite to the first direction. The surface is configured to contact the corresponding one of the plurality of engagement portions.