Rollable Heat Dissipation Sheet with Roller Mechanism
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Solution Overview
Problem
In rollable electronic apparatuses, heat dissipation sheets can be interfered with and worn out when housings slide, leading to increased thickness and instability, which compromises heat dissipation efficiency.
Innovation Solution
A heat transfer sheet with a flexible, thermally conductive material is used, coupled to a roller that winds and unwinds to maintain effective heat dissipation without increasing the thickness of the apparatus, utilizing a motor-driven mechanism and elastic members to ensure flatness and tension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a heat dissipation sheet is disposed in the overlapping area between first housing and second housing, then heat dissipation efficiency is improved, but the sheet is interfered with and worn out during sliding movement
Solution Approach 1:
The heat dissipation sheet is configured to be movable relative to the housings during sliding operations. The sheet can dynamically adjust its position to avoid being trapped between the first and second housings, thereby preventing wear and damage while maintaining thermal contact with heat-generating components throughout the sliding range.
2Stability of the object's composition
If spacing is increased between first housing and second housing to avoid sheet interference, then sheet wear is prevented, but apparatus thickness increases and sliding stability decreases
Solution Approach 1:
Rather than increasing static spacing between housings, the patent implements a dynamic configuration where the heat dissipation sheet can move with the sliding housings. This allows the sheet to remain protected from pinching while maintaining minimal spacing between housings, thus avoiding increased apparatus thickness and preserving sliding stability.
3Reliability
If heat dissipation sheet is made rigid to improve thermal conductivity, then heat dissipation efficiency is improved, but flexibility and adaptability to housing movement are reduced
Solution Approach 1:
The heat dissipation sheet is implemented as a flexible thin film or laminate structure that maintains high thermal conductivity while being capable of bending and moving with the sliding housings. This flexible configuration allows the sheet to adapt to changing spatial relationships between components without compromising thermal performance.
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
The solution effectively dissipates heat across a larger area, reducing temperature gradients and preventing performance degradation while maintaining the apparatus's slim design and stability.
Implementation Method 1
a heat transfer sheet including a flexible and thermally conductive material
Data Source
AI summary
An electronic apparatus includes: a first housing; a second housing coupled to the first housing such as to be slidable in a first direction away from the first housing and in a second direction opposite to the first direction; a roller including a rotation shaft oriented perpendicular to the first direction and the second direction, the roller being in at least one from among the second housing and the first housing; and a heat transfer sheet including a flexible and thermally conductive material, wherein one end portion of the heat transfer sheet is coupled to the roller, wherein the roller is configured to wind the heat transfer sheet in a case where the second housing slides in the second direction and unwind the heat transfer sheet in a case where the second housing slides in the first direction.