Liquid Ejection Head Segmentation for Variable Tank Capacity

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Solution Overview

Problem

Existing liquid ejection apparatuses face challenges in accommodating liquid tanks of varying capacities without modifying the entire apparatus, particularly when using multiple types of liquids, as this requires changes to the liquid feed pipe and other components, which is economically disadvantageous.

Innovation Solution

A liquid ejection head design that separates the liquid ejection section and the liquid tank loading section, using a fixation means to securely attach them, allowing for the use of liquid tanks of different capacities and sizes, with a lock member and resilient member for easy loading and unloading, and electrical wiring substrates for efficient signal transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If the entire liquid ejection head configuration is modified to accommodate larger capacity liquid tanks, then the liquid tank capacity can be increased, but the manufacturing cost increases and existing components become obsolete

Engineering Contradiction:
Improveliquid tank capacityVSAvoidmanufacturing cost
Core Design Contradiction:
Quantity of substanceVSEase of manufacture

Solution Approach 1:

The liquid ejection head is divided into two independent sections: a liquid ejection section (including element substrate and electrical wiring substrate) and a liquid tank loading section (including containing space and lock member). This segmentation allows the liquid tank loading section to be modified for different tank capacities while the liquid ejection section remains unchanged, reducing manufacturing costs.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The liquid ejection section is designed as a universal component that can be paired with different liquid tank loading section configurations. The standardized liquid ejection section can accommodate various tank capacities through interchangeable loading sections, making the system multi-functional and cost-effective.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Duration of action of moving object

If the liquid tank capacity is increased, then the liquid supply duration is extended, but the liquid tank loading section configuration must be modified

Engineering Contradiction:
Improveliquid supply durationVSAvoidloading section configuration
Core Design Contradiction:
Duration of action of moving objectVSDevice complexity

Solution Approach 1:

By separating the liquid tank loading section from the liquid ejection section, the patent allows independent optimization of each module. The containing space dimensions can be adjusted for different tank capacities without affecting the complex liquid ejection section, thereby extending liquid supply duration while maintaining manageable device complexity.

Inventive Principle:
Principle #1Segmentation

3Adaptability or versatility

If different types of liquid tanks are used in a liquid ejection apparatus, then the versatility of the apparatus is improved, but the liquid feed pipe and other components must be modified

Engineering Contradiction:
Improveapparatus versatilityVSAvoidcomponent configuration
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The liquid ejection section serves as a universal interface that can work with different liquid tank loading section configurations. This universality allows the apparatus to handle different types of liquid tanks without modifying the liquid ejection section components, thereby improving versatility while controlling device complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS9446592B2Liquid ejection cartridge and liquid ejection apparatus
Publication Date: 2016.09.20 CANON KK
  • US9446592B2 patent drawing
  • US9446592B2 patent drawing
  • US9446592B2 patent drawing

AI summary

A liquid ejection head includes a liquid ejection section including an element substrate having ejection ports for ejecting liquid and an electrical wiring substrate connected to a contact of the liquid ejection apparatus to transmit signals to the element substrate, a liquid tank loading section including a containing space for containing a liquid tank storing liquid to be supplied to the element substrate and a lock member having an engaging part for engaging with a holding part of the liquid tank and a fixation means for rigidly securing the liquid election section and the liquid tank loading section in position.