Liquid Jet Head Cooling and Pressing Structure for Coupling Reliability
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Solution Overview
Problem
Existing liquid jet recording apparatuses face challenges in improving reliability due to difficulties in effectively cooling and securely fixing drive devices on flexible boards, leading to potential thermal disadvantages and coupling failures.
Innovation Solution
A liquid jet head design that includes a heat radiation member to cool drive devices and a fixation part to securely attach a pressing member to the flexible board, with the fixation part positioned perpendicular to the drive device arrangement, ensuring uniform thermal contact and reducing stress on terminal couplings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drive devices are mounted on a flexible board without a fixation part, then the board flexibility is maintained, but the drive device becomes loose and coupling failures occur
Solution Approach 1:
The pressing member is divided into a pressing portion that contacts the drive device and a fixation portion that attaches to the flexible board. This segmentation allows the fixing function to be separated from the pressing function, enabling reliable coupling while maintaining board flexibility through perpendicular arrangement of the fixation part
Solution Approach 2:
The fixation part is arranged in a direction perpendicular to the drive device arrangement direction, transitioning from a one-dimensional linear arrangement to a two-dimensional spatial arrangement. This dimensional change allows the fixation part to be positioned without interfering with the drive device layout, resolving the contradiction between fixing reliability and structural simplicity
2Temperature
If drive devices are cooled by a heat radiation member, then thermal management is improved, but the mounting structure becomes more complex
Solution Approach 1:
The heat radiation member is integrated with the pressing member, combining the cooling function and the fixing function into a single component. This merging eliminates the need for separate cooling structures, reducing overall structural complexity while maintaining effective thermal management through direct contact with the drive device
Solution Approach 2:
The pressing member serves multiple functions: it applies pressing force to ensure electrical contact, acts as a heat radiation member for thermal management, and includes a fixation portion for secure mounting. This multi-functionality reduces the number of components needed, resolving the contradiction between thermal management capability and structural simplicity
3Ease of manufacture
If the fixation part is positioned along the drive device arrangement direction, then assembly is simplified, but stress concentrates on terminal couplings
Solution Approach 1:
The fixation part is positioned asymmetrically relative to the drive device arrangement, specifically in a direction perpendicular to the arrangement direction. This asymmetric positioning distributes stress away from the terminal couplings while maintaining assembly simplicity through the straightforward perpendicular alignment, resolving the contradiction between assembly ease and coupling reliability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances reliability by promoting efficient cooling and stable operation of drive devices, reducing the risk of coupling failures, and allowing for high-frequency ejection while maintaining design flexibility and cost-effectiveness.
Implementation Method 1
a heat radiation member which is disposed at the first surface side in the drive board, and which is configured to cool the drive device
Data Source
AI summary
A liquid jet head and so on capable of improving the reliability are provided. A liquid jet head according to an embodiment of the present disclosure includes a jet section including a plurality of nozzles configured to jet a liquid, a drive board having a first surface on which a single drive device or a plurality of drive devices for outputting a drive signal for jetting the liquid from the nozzles to the jet section is disposed, a heat radiation member which is disposed at the first surface side in the drive board, and which is configured to cool the drive device, a pressing member which is disposed at a second surface side opposed to the first surface in the drive board, and which is configured to press the drive board against the heat radiation member, and a fixation part configured to fix a part of the pressing member to the drive board. An arrangement area of the drive device extends along a first direction in the first surface, and the fixation part is disposed in a region along a second direction perpendicular to the first direction in the first surface with reference to an arrangement position of the drive device.