Liquid Ejection Head Asymmetric Pressure Chamber Orientation
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Solution Overview
Problem
The existing liquid ejection heads with pressure chambers arranged in a matrix form face challenges in reducing their overall size due to the longitudinal direction of the pressure chambers being aligned in the shorter direction, making it difficult to compact the entire head.
Innovation Solution
The liquid ejection head is designed with pressure chambers that are longer in the second direction, allowing them to be arranged in a matrix form within the same two-dimensional area, thereby reducing the width in the shorter direction of the flow path unit and compacting the entire head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the longitudinal direction of pressure chambers is aligned in the shorter direction of the head, then the area in which the pressure chambers are arranged in the matrix form becomes larger, but the entire size of the head becomes larger and more difficult to reduce
Solution Approach 1:
The pressure chambers are designed with asymmetric dimensional orientation where the longitudinal direction (first direction) is aligned with the longer direction of the flow path unit rather than the shorter direction. This asymmetric arrangement optimizes the spatial utilization, allowing the matrix array of pressure chambers to fit more efficiently within the flow path unit's dimensional constraints, thereby reducing the overall head size while maintaining adequate arrangement area
Solution Approach 2:
The invention changes the dimensional orientation of pressure chamber arrangement by aligning the longitudinal direction of pressure chambers with the longer direction of the flow path unit. This dimensional reorientation transforms the spatial configuration from a conventional alignment, enabling more effective use of the available space in the two-dimensional matrix arrangement and achieving compact head dimensions
Data Source
AI summary
A liquid ejection head including a flow path unit is provided. The flow path unit includes a plurality of liquid ejection ports arranged in a matrix form in a two-dimensional area of a parallelogram, and a plurality of pressure chambers communicating with the plurality of liquid ejection ports, respectively, and each pressure chamber being long in a first direction. The flow path unit is long in a second direction. Each of the pressure chambers has a length in the second direction larger than a length in a direction orthogonal to the second direction. The plurality of pressure chambers are arranged in a matrix form in a substantially same area as the two-dimensional area.