Foldable Chassis Heat Transfer Sheet With S-Shaped Flex Cable
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Solution Overview
Problem
Electronic apparatuses with foldable designs face challenges in heat management due to temperature differences between chassis, leading to potential performance degradation and noise issues from deformation of flexible boards and graphite sheets during rotational movement.
Innovation Solution
Incorporating a flat cable with a heat transfer sheet and a substantially S-shaped surplus length absorbing part, where the flat cable and heat transfer sheet adhere to each other, to facilitate heat transportation between chassis without generating abnormal noise, even during shape changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a graphite sheet is stacked on the flexible board for good space efficiency, then heat transportation between chassis is improved, but abnormal sliding or deformation noise is generated when the laminate changes size or shape at the S-shaped folded part
Solution Approach 1:
The patent uses a flexible board with an S-shaped folded part that can change its shape and size to accommodate thermal expansion and contraction during rotational movement, preventing abnormal noise while maintaining heat transportation functionality
Solution Approach 2:
The patent changes the geometric parameters of the flexible board by creating an S-shaped folded part with specific curvature and length, allowing the board to dynamically adjust its dimensions during rotation to absorb dimensional changes without generating noise
2Volume of moving object
If the chassis are made smaller and thinner to improve portability, then compactness is improved, but mounting a cooling system with high cooling capacity becomes difficult
Solution Approach 1:
The flexible board serves multiple functions: it provides electrical connection between chassis, acts as a heat transfer path, and functions as a dimensional buffer during rotation. This multi-functionality eliminates the need for separate cooling components, maintaining cooling capacity in compact chassis
Solution Approach 2:
The patent merges the heat transfer function with the flexible board structure by disposing a graphite sheet on the flexible board, combining electrical connection, heat transfer, and dimensional compensation into a single integrated component
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
This configuration effectively balances heat distribution between chassis, preventing performance degradation and noise issues, while maintaining compactness and efficiency in heat transfer.
Implementation Method 1
a graphite sheet may be disposed between the chassis to transport heat
Implementation Method 2
the flat cable and the heat transfer sheet adhering to each other over an entire length of the surplus length absorbing part
Data Source
AI summary
An electronic apparatus includes a first chassis and a second chassis that are relatively rotatably connected via a hinge, and includes: a flexible board extending across the first chassis and the second chassis; and a graphite sheet disposed on the flexible board, the graphite sheet together with the flexible board extending across the first chassis and the second chassis, the flexible board and the graphite sheet having a substantially S-shaped surplus length absorbing part having two folded parts curved in opposite directions inside the first and second chassis, the flexible board and the graphite sheet adhering to each other by adhesive tape over an entire length of the surplus length absorbing part.