Flexible Board Deformation Suppression for Drive Device Reliability
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Solution Overview
Problem
Existing liquid jet recording apparatuses face challenges in improving the reliability of flexible boards due to deformation issues, particularly at the end portions of drive devices, leading to potential separation and reduced yield during assembly.
Innovation Solution
The flexible board design incorporates a deformation suppression part on a second wiring layer to prevent deformation, ensuring the drive devices are securely mounted and reducing stress concentrations, thereby enhancing the board's reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the flexible board is made flexible to allow bending and assembly, then the ease of manufacture and assembly are improved, but the board deforms during operation leading to reduced reliability
Solution Approach 1:
The flexible board is divided into multiple regions with different rigidity characteristics. A first region is designed with high rigidity to maintain stability during operation, while a second region is designed with flexibility to enable bending and assembly. This segmentation allows the board to simultaneously achieve ease of assembly and operational reliability by assigning different functional properties to different spatial zones.
2Adaptability or versatility
If drive devices are mounted on the flexible board to generate drive signals, then the functionality is improved, but the end portions of drive devices deform and separate leading to reduced yield
Solution Approach 1:
The flexible board implements local quality differentiation by providing a first region with high rigidity specifically positioned to support drive devices, while maintaining flexibility in other regions. This localized rigidity enhancement at the drive device mounting area prevents deformation and separation of drive device end portions during assembly and operation, thereby improving assembly yield without compromising the overall functionality of the flexible board.
Data Source
AI summary
A flexible board and so on capable of easily improving the reliability are provided. The flexible board according to an embodiment of the present disclosure is a flexible board configured to output a drive signal to be applied to a liquid jet head having a plurality of nozzles, including a plurality of wiring layers including a first wiring layer and a second wiring layer opposed to each other along a direction perpendicular to a surface of the board, one or a plurality of drive devices which are arranged in a first region of the first wiring layer, and which are configured to generate the drive signal configured to jet a liquid from the nozzle, and a deformation suppression part which is disposed in a second region of the second wiring layer, and which is configured to suppress a deformation of the flexible board.