Bent Arm Pressing Member for Uniform Heat Dissipation
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Solution Overview
Problem
Conventional heat dissipation structures using a linear pressing member for heat receiving blocks on substrates suffer from position-dependent pressure, leading to varying heat dissipation ratios and potential local plastic deformation, which increases stress and position dependency.
Innovation Solution
A pressing member with a band-like pressing portion and two arms connected in a bent shape, forming an X or reverse Z shape, is used to press the heat receiving block against the element, distributing pressure more evenly and reducing the length of the arm, thus minimizing local stress and plastic deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the area of the heat receiving block pressed by the pressing member is enlarged to avoid position dependency of heat dissipation ratio, then the heat dissipation uniformity is improved, but the arm length becomes short causing local stress increase and plastic deformation
Solution Approach 1:
The pressing member is divided into multiple pressing portions (first pressing portion and second pressing portion) that can independently press different areas of the heat receiving block. This segmentation allows each pressing portion to be optimized for its specific function while distributing the mechanical load, thereby maintaining heat dissipation uniformity without requiring excessive arm length that would cause plastic deformation.
Solution Approach 2:
The pressing member transitions from a linear configuration to a planar configuration with multiple pressing portions arranged in different spatial locations. This dimensional change allows the pressing member to cover a larger effective area for heat dissipation while keeping the arm length within acceptable limits to prevent plastic deformation.
2Device complexity
If a linear pressing member is used for simplicity, then the device complexity is reduced, but position dependency of pressure occurs leading to varying heat dissipation ratios
Solution Approach 1:
The pressing member is segmented into multiple pressing portions (first pressing portion and second pressing portion) arranged in different spatial locations. Each pressing portion can independently apply pressure to different areas of the heat receiving block, eliminating the position dependency issue inherent in linear pressing members while maintaining relative structural simplicity.
Solution Approach 2:
Multiple pressing portions are merged into a single integrated pressing member structure that shares common support elements. This combining approach achieves uniform heat dissipation across the heat receiving block while avoiding the complexity of completely separate pressing mechanisms.
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 enhances heat dissipation uniformity, reduces position dependency of pressure, and allows for efficient layout of electronic components by minimizing the surface area occupied by the pressing member, while preventing plastic deformation and maintaining effective heat transfer.
Implementation Method 1
an area of the heat receiving block pressed by the pressing member is less than the entire area of the heat receiving block, there is caused the position dependency of the pressure acting from the heat receiving block on the element
Implementation Method 2
a structure for dissipating heat, which is generated by an element mounted on a substrate, to the environment through a heat receiving block, a heat pipe, a heat dissipating member
Implementation Method 3
heat receiving block, a heat pipe, a heat dissipating member
Implementation Method 4
heat receiving block, a heat pipe, a heat dissipating member
Data Source
AI summary
According to one embodiment, a pressing member includes: a band-like pressing portion placed on a heat receiving block arranged on an element mounted on a substrate, the pressing portion configured to press the heat receiving block against the element; a first arm, one end of the first arm being connected to one longitudinal end of the pressing portion, other end of the first arm being connected to the substrate; and a second arm, one end of the second arm being connected to other longitudinal end of the pressing portion, other end of the second arm being connected to the substrate, wherein the first arm and the second arm are connected to the pressing portion in a bent shape as seen in a planar view from above a surface of the substrate.