Cartridge Case Assembly with Guided Shaft and Elastic Restoring Force
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Solution Overview
Problem
The assembly of ink tank cartridge cases is complex due to the need to arrange pressure roller holders into ratchet guides, leading to difficulties in the assembly process.
Innovation Solution
The cartridge case design features separate first and second cases with protruding portions and a shaft portion guided by these protrusions, allowing for easier assembly by sliding the cases relative to each other, with an elastic member providing restoring force to take up the liquid storage bag without tilting or bending, and a shaft recessed portion to secure the elastic member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure roller holders are arranged in both end portions of the pressure roller and inserted into ratchet guides formed in hole portions on the inside of wall portions, then the pressure roller can be guided while moving, but the assembly operation of the cartridge case becomes complex
Solution Approach 1:
The invention merges the guiding function and support function into a single integrated structure. The support walls extend from the bottom wall to form both the support surface and the guiding side surfaces, eliminating the need for separate ratchet guides and pressure roller holders. This integration simplifies the assembly process while maintaining the guiding accuracy of the pressure roller.
Solution Approach 2:
The invention extracts the guiding function from the complex ratchet guide mechanism and integrates it into the support walls themselves. The side surfaces of the support walls directly guide the pressure roller, removing the need for separate guiding components and simplifying the overall structure.
2Productivity
If the shaft portion moves to take up the bag with restoring force of the elastic member, then the bag can be pressurized for liquid discharge, but the shaft portion may tilt or bend during movement
Solution Approach 1:
The invention applies local quality by providing guiding side surfaces on the support walls at specific locations where the pressure roller moves. These side surfaces are positioned to constrain the pressure roller laterally during its movement, preventing tilting and bending while allowing the restoring force to effectively pressurize the bag for liquid discharge.
Solution Approach 2:
The support walls act as an intermediary structure that transmits the restoring force from the elastic member to the pressure roller while simultaneously providing lateral guidance. The guiding side surfaces of the support walls mediate between the force application and the movement, ensuring the shaft portion remains aligned during operation.
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
This design simplifies the assembly process by guiding the components into place and preventing tilting or bending of the shaft portion, ensuring smooth operation and reliable liquid storage bag uptake.
Implementation Method 1
an elastic member configured to generate a restoring force in a first direction by extending in a second direction opposite to the first direction
Data Source
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AI summary
A first case is provided with one of a pair of facing surfaces and a second case is provided with another of the pair of facing surfaces. The first case and the second case extend in a first direction. A shaft portion takes up an end portion on a second direction side of an elastic member. The elastic member generates a restoring force in the first direction. The shaft portion extends in a third direction. The third direction is parallel to the facing surfaces and orthogonal to the first direction. A first protruding portion is a protruding portion provided on an end portion on the third direction side of the first case. A second protruding portion is a protruding portion provided on an end portion on the third direction side of the second case. The first protruding portion and the second protruding portion are formed across the first direction. Protruding end portions protrude in the third direction from each of a pair of end portions in the third direction of the shaft portion to a position between the first protruding portion and the second protruding portion.