Liquid Ejecting Head Sealing Member Segmentation
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Solution Overview
Problem
The existing liquid ejecting units face a decrease in sealing performance due to deformation of sealing members when mounting liquid ejecting heads to the cover, which affects the seal between the liquid ejecting heads and the cover, leading to potential disturbances in air flow and ink leakage.
Innovation Solution
A liquid ejecting head with a sealing member that includes a first seal portion to seal the liquid ejecting head and a fixing member, and a second seal portion to seal the fixing member and the cover, ensuring stable sealing performance by minimizing the impact of deformation on either seal portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the liquid ejecting head is mounted to the cover to ensure proper positioning, then the positioning accuracy is improved, but the sealing performance deteriorates due to deformation of the sealing member
Solution Approach 1:
The sealing member is divided into multiple independent seal portions (first seal portion and second seal portion) that can function independently. The first seal portion seals between the liquid ejecting head and the fixing member, while the second seal portion seals between the fixing member and the cover, allowing each portion to be optimized for its specific sealing location without being compromised by positioning operations.
Solution Approach 2:
A fixing member is introduced as an intermediary component between the liquid ejecting head and the cover. This fixing member includes positioning protrusions that ensure accurate positioning while also providing sealing surfaces for the sealing member, thereby separating the positioning function from the sealing function to avoid interference between them.
2Reliability
If the sealing member is deformed during mounting to ensure seal between liquid ejecting head and cover, then the sealing performance is improved, but the air flow stability deteriorates
Solution Approach 1:
The sealing member is segmented into multiple independent seal portions that perform sealing functions at different locations without interfering with each other. The first seal portion handles the seal between the liquid ejecting head and fixing member, while the second seal portion handles the seal between the fixing member and cover, allowing controlled deformation at each segment without causing air flow disturbances.
3Device complexity
If a single seal portion is used to seal both the liquid ejecting head and the cover, then the device complexity is reduced, but the sealing reliability decreases due to deformation interference
Solution Approach 1:
The sealing member is divided into multiple independent seal portions (first seal portion and second seal portion) that can function independently. Each seal portion is optimized for its specific sealing location, with the first seal portion sealing between the liquid ejecting head and the fixing member, and the second seal portion sealing between the fixing member and the cover, thereby improving overall sealing reliability.
Solution Approach 2:
A fixing member is introduced as an intermediary component that provides both positioning and sealing functions. This fixing member includes positioning protrusions for accurate alignment and provides sealing surfaces for the sealing member, thereby separating the positioning function from the sealing function to avoid interference between them.
Data Source
AI summary
A liquid ejecting head with a sealing member includes: a liquid ejecting head including a liquid ejecting surface configured to eject ink; a fixing member configured to be attachable to and detachable from the liquid ejecting head; and a sealing member configured to seal the liquid ejecting head and the fixing member. When the liquid ejecting head to which the fixing member is joined is mounted on a cover, the sealing member seals the liquid ejecting head and the cover.