Liquid Ejection Head Positioning Adjustment Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid ejection heads face challenges in maintaining accurate positioning due to adhesive displacement and deformation, especially in large or complex printheads, leading to potential positional shifts during mounting and operation.
Innovation Solution
The liquid ejection head incorporates adjustment screws and securing screws to precisely position and secure the positioning member, eliminating the need for adhesives and ensuring stable alignment without thermal deformation, thus maintaining high-accuracy positioning and preventing displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If adhesive is used to secure positioning member to printhead, then positioning can be achieved, but positional displacement occurs due to adhesive contraction during curing or heating
Solution Approach 1:
The patent removes the adhesive from the positioning and securing process entirely. Instead of using adhesive to secure the positioning member to the printhead, the invention uses a mechanical positioning structure with positioning protrusions and grooves that enable accurate positioning without adhesive, thereby eliminating the problem of adhesive contraction causing positional displacement.
Solution Approach 2:
The patent introduces a positioning member with specific positioning protrusions and grooves as an intermediary mechanical structure between the printhead and the mounting surface. This mechanical intermediary enables both positioning and securing functions without relying on adhesive, resolving the contradiction between achieving positioning and maintaining positioning stability.
2Manufacturing precision
If adhesive is used to secure positioning member, then initial positioning can be achieved, but external forces cause deformation, peel-off, and positional displacement
Solution Approach 1:
The patent extracts the adhesive from the system and replaces it with a mechanical fastening mechanism using positioning protrusions, grooves, and securing members. This mechanical connection provides both positioning accuracy and resistance to external forces, simultaneously achieving both positioning precision and bond strength.
Solution Approach 2:
The patent employs rounded positioning protrusions and corresponding grooves that facilitate precise positioning while distributing mechanical stresses. The curved surfaces allow for self-alignment and reduce stress concentration points, enhancing both positioning accuracy and structural strength against external forces.
3Manufacturing precision
If adhesive is used to secure printhead, then positioning can be achieved, but great force is needed for full-line-type printheads making deformation and peel-off more likely
Solution Approach 1:
The patent divides the securing function into multiple distributed positioning protrusions and grooves along the printhead. This segmentation distributes the securing force across multiple contact points rather than concentrating it in one area, reducing the risk of deformation and peel-off even when great force is applied during mounting of full-line-type printheads.
Solution Approach 2:
The rounded positioning protrusions and grooves distribute mechanical loads more evenly across the contact surfaces. The curved geometry allows for better stress distribution and reduces stress concentration, enabling accurate positioning and secure mounting even when high forces are involved in securing large full-line-type printheads.
Data Source
AI summary
To assemble a positioning member, which is to come into abutment with a liquid ejection apparatus, to a liquid ejection member, the present disclosure has adjustment parts for adjusting positions of the positioning member and the liquid ejection member and securing parts for coupling and securing the positioning member and the liquid ejection member and thereby couples and secures the positioning member and the liquid ejection member. Thus, the positions of ejection ports of the liquid ejection head set in the liquid ejection apparatus and reference positions can be positioned with high accuracy.