Pivotable Fluid Container Case for Ejection Device

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Solution Overview

Problem

Existing fluid ejection devices face challenges in accommodating larger capacity fluid containers, leading to space constraints and potential damage during installation due to inadequate design considerations.

Innovation Solution

A fluid ejection device design featuring a pivotably attached container case that opens rotatably about a rotation shaft, incorporating a delivery tube and needle for fluid delivery, allowing for efficient accommodation and secure positioning of larger fluid packs while preventing accidental damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If larger capacity fluid containers are used, then the fluid storage capacity is improved, but the space within the unit between fluid containers and other structures becomes insufficient

Engineering Contradiction:
Improvefluid storage capacityVSAvoidspace within unit
Core Design Contradiction:
Quantity of substanceVSArea of stationary object

Solution Approach 1:

The container case is designed to pivot about a rotation shaft, transitioning from a fixed planar arrangement to a three-dimensional rotational configuration. This allows the fluid container to be positioned in a different spatial plane during installation, enabling larger container sizes while maintaining adequate space relationships with other unit structures through vertical and rotational positioning rather than only horizontal arrangement.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Quantity of substance

If larger capacity fluid containers are installed, then the fluid storage capacity is improved, but damage to other structures inside the unit due to operator error occurs

Engineering Contradiction:
Improvefluid storage capacityVSAvoiddamage to internal structures
Core Design Contradiction:
Quantity of substanceVSObject-affected harmful factors

Solution Approach 1:

The container case is designed with a predetermined rotational path and positioning mechanism that guides the installation process. The rotation shaft and associated structures are pre-configured to receive the fluid container in a specific orientation, preventing operator error and potential damage to internal structures during installation by establishing a controlled, pre-planned insertion trajectory.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The container case acts as an intermediary component between the fluid container and the internal structures of the unit. It provides a dedicated rotational interface that mediates the interaction, allowing the fluid container to be positioned safely without direct contact or interference with other internal structures, thereby preventing damage even during operator error.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Device complexity

If a fixed container design is used, then the structure is simple, but positioning flexibility of fluid packs is limited

Engineering Contradiction:
Improvecontainer structureVSAvoidpositioning flexibility
Core Design Contradiction:
Device complexityVSAdaptability or versatility

Solution Approach 1:

The container case transitions from a fixed design to a dynamic, pivotable structure that can rotate about a rotation shaft. This dynamic capability provides positioning flexibility, allowing the fluid container to be adjusted to different orientations and positions during installation and operation, while the overall structure remains relatively simple through the use of a single rotational degree of freedom.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS8864290B2Installing fluid container in fluid ejection device
Publication Date: 2014.10.21 SEIKO EPSON CORP
  • US8864290B2 patent drawing
  • US8864290B2 patent drawing
  • US8864290B2 patent drawing

AI summary

A fluid ejection device includes a fluid ejection unit that ejects a fluid onto an ejection target; a main chassis case that includes a platen disposed in a area for ejecting the fluid by the fluid ejection unit; a container case for containing a pack, the pack containing a fluid for ejection, wherein the container case is pivotably attached to the main chassis case and openable by rotation about a rotation shaft; and a delivery tube that delivers the fluid from the pack to the fluid ejection unit.