Printing Fluid Cartridge Light Attenuating Portion
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Solution Overview
Problem
Existing printing fluid cartridges lack efficient mechanisms for detecting ink levels and communicating with printers, leading to potential misalignment and incomplete printing due to inadequate light attenuation and electrical interface designs.
Innovation Solution
A printing fluid cartridge with a light attenuating portion and an electrical interface, featuring a pivotable member, guide portions, and a sub-frame that allows for precise ink level detection and communication through optical sensors and electrical contacts, ensuring accurate ink monitoring and fluid supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a light attenuating portion is added to detect ink levels, then ink level detection capability is improved, but device complexity increases
Solution Approach 1:
The patent combines the light attenuating portion with existing cartridge components such as the ink chamber walls or separate walls that are already part of the cartridge structure. This merging approach allows ink level detection functionality to be added without significantly increasing overall device complexity, as the light attenuating structures are integrated into components that must exist anyway for ink containment.
Solution Approach 2:
The light attenuating portion is divided into multiple segments or sections corresponding to different ink level thresholds. These segmented structures can be positioned at different heights within the ink chamber, allowing the optical sensor to detect ink levels at multiple predetermined thresholds by detecting which segment blocks the light path, thereby improving measurement precision through staged detection.
2Loss of information
If an electrical interface is positioned on the cartridge, then communication capability with printer is improved, but misalignment risk increases
Solution Approach 1:
The electrical interface is positioned on the upper surface of the cartridge rather than on the side facing the printer. This dimensional relocation allows the interface to engage with corresponding contacts in the printer at a different spatial location, reducing misalignment risks by providing a more stable and accessible engagement point that is less sensitive to insertion variations.
Solution Approach 2:
The cartridge structure includes guide portions and positioning features that pre-align the electrical interface with the printer's contact points before full insertion occurs. This preliminary alignment action ensures that the electrical contacts are properly positioned and engaged early in the mounting process, preventing misalignment and ensuring reliable communication from the start.
3Manufacturing precision
If guide portions are added to prevent misalignment, then mounting precision is improved, but device complexity increases
Solution Approach 1:
The guide portions serve multiple functions: they guide the cartridge into proper alignment during insertion, prevent misalignment of the electrical interface, and may also serve as structural support elements or defining features for the mounting cavity. This multi-functionality allows alignment precision to be improved without proportionally increasing device complexity, as the same structural elements perform multiple roles.
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
Enhances ink level detection accuracy and communication with printers, preventing misalignment and ensuring complete printing processes by effectively attenuating light and establishing reliable electrical connections.
Implementation Method 1
a light attenuating portion protruding from the upper side of the front side and configured to attenuate light traveling in a left-right direction
Data Source
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AI summary
A printing fluid cartridge includes a front side, a rear side, an upper side, a lower side, a tubular fluid supply portion positioned at the lower side of the front side, a pivotable member configured to pivot about a pivot point and comprising an end portion. The pivot point is positioned at the upper side and the end portion is positioned at the rear side. The printing fluid cartridge also includes a light attenuating portion protruding from the upper side of the front side and configured to attenuate light, and an electrical interface positioned between the pivotable member and the light attenuating portion. An upper end of the light attenuating portion is positioned below the electrical interface.