Liquid Ejecting Head Positioning Abutting Unit
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Solution Overview
Problem
Existing liquid ejecting apparatuses face challenges in achieving high positioning accuracy for the cap main body, leading to potential errors and increased size due to integrated dimensional tolerances and position shifts between components.
Innovation Solution
A liquid ejecting apparatus with a positioning abutting unit on the cap main body that includes a side wall and a sealing member, allowing for precise contact and forming a sealed space, thereby reducing errors and allowing miniaturization by eliminating the need for surplus contact regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing member is positioned by direct contact with the liquid ejecting head, then the sealing function is achieved, but dimensional tolerances and position shifts of multiple components are integrated, causing positioning errors
Solution Approach 1:
The patent introduces a positioning abutting unit as an intermediary component between the sealing member and the liquid ejecting head. This positioning abutting unit has a positioning surface that contacts the sealing member, while the sealing member contacts the liquid ejecting head. By using this intermediary positioning abutting unit, the patent separates the sealing function from the positioning function, preventing the integration of dimensional tolerances and position shifts from multiple components, thus improving positioning accuracy while maintaining reliable sealing.
2Reliability
If a large blank space portion is provided for the sealing member to contact, then sealing reliability is improved even when shifted, but the liquid ejecting head becomes large
Solution Approach 1:
The positioning abutting unit serves as an intermediary that provides a dedicated positioning surface for the sealing member. This allows the sealing member to be precisely positioned without requiring a large blank space portion for tolerance compensation. The positioning abutting unit absorbs the positioning function, enabling the sealing member to contact the liquid ejecting head with minimal clearance, thus reducing the overall size of the liquid ejecting head while maintaining sealing reliability.
3Ease of manufacture
If multiple components are interposed between the sealing member and positioning reference, then assembly flexibility is improved, but dimensional tolerances and position shifts are integrated, causing errors
Solution Approach 1:
The positioning abutting unit is designed as a dedicated intermediary component that provides a positioning surface for the sealing member. By concentrating the positioning function in this single positioning abutting unit rather than distributing it across multiple components, the patent prevents the integration of dimensional tolerances and position shifts from multiple components. This maintains assembly flexibility while ensuring high positioning accuracy, as the positioning abutting unit serves as a stable reference point for the sealing member.
Data Source
AI summary
A liquid ejecting apparatus includes a liquid ejecting head and that includes nozzle openings through which liquid is ejected. A positioning abutting unit is arranged on an outer side of a region in which a plurality of the nozzle openings are formed. A cap main body is arranged so as to relatively move with respect to the liquid ejecting head. The cap main body has a side wall. A sealing member is accommodated inside the cap main body, comes into contact with the positioning abutting unit in a state of surrounding the region due to the relative movement of the liquid ejecting head and the cap main body, and forms a sealed space inside of the cap main body.