Inkjet Head Frame Positioning to Suppress Bending
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing inkjet recording apparatuses face challenges in suppressing the bending deformation of flat head frames with thickness directions perpendicular to the inkjet head ejection direction, which affects the accuracy and rigidity of inkjet head positioning.
Innovation Solution
The apparatus incorporates a flat plate-shaped head frame with first and second positioning parts, protruding parts, groove parts, and pressing parts to restrict movement and maintain alignment, ensuring the head frame's stability without pressing it in the width direction, thereby preventing bending deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a box-shaped head frame is used to suppress deformation, then the rigidity and positioning accuracy are improved, but the size of the head unit becomes large
Solution Approach 1:
The head frame is divided into a flat plate-shaped main body and separate positioning parts that are attached to it. The positioning parts include pressing parts that apply force to constrain the head frame, while the main body remains flat and compact. This segmentation allows the positioning function to be separated from the main frame structure, achieving accurate positioning without requiring a bulky box-shaped frame.
2Volume of moving object
If a flat head frame is used to reduce size, then the head unit size is reduced, but the head frame becomes less rigid and may deform in an arch shape
Solution Approach 1:
Positioning parts are introduced as intermediary components between the flat head frame and the constraining forces. These positioning parts include pressing parts that apply localized force to specific areas of the head frame, preventing arch deformation without requiring the entire frame to be thick or box-shaped. The positioning parts act as mediators that distribute and manage the mechanical stresses on the flat frame.
3Strength
If pressing parts are added to suppress deformation, then the rigidity is improved, but the device complexity increases
Solution Approach 1:
Instead of making the entire head frame thick or box-shaped to improve rigidity, the invention applies pressing parts only at specific locations where deformation would occur. The flat head frame maintains its thin profile in most areas, with localized reinforcement only where needed for positioning accuracy. This local quality approach improves rigidity where necessary while keeping the overall structure simple and compact.
Data Source
AI summary
A printer (1) includes: a head frame (30); a first positioning part (51) facing to a first area (31) of the head frame (30); a second positioning part (52) facing to a second area (32) of the head frame (30); a first protruding part (41) protruding from the first area (31) toward the first positioning part (51); a second protruding part (42) protruding from the second area (32) toward the second positioning part (52); a first groove part (51V) provided in the first positioning part (51) along the ejection direction; a first pressing part (61) pressing the first protruding part (41) to the first groove part (51V); a second pressing part (62) pressing the second protruding part (42) to the second positioning part (52); and a first regulation part (71L) and a second regulation part (72L) restricting a movement of the head frame (30) in the ejection direction.