PCB Rotation Hook Fastening for Thin Housing Rigidity
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Solution Overview
Problem
The reduction in thickness and weight of electronic device housings leads to decreased rigidity, causing them to easily pop out or be pressed, compromising their structural integrity.
Innovation Solution
Incorporation of a fastening structure within the electronic device comprising a fixing member, rotation hook, and elastic member that generates torque to secure the housing components, preventing popping out and maintaining rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the thickness of the housing is decreased to improve portability, then the weight and thickness are reduced, but the rigidness of the housing decreases causing it to be easily transformed or pop out
Solution Approach 1:
The housing is divided into multiple components (front cover, rear cover, intermediate housing) that are connected through fastening structures. The first and second fastening structures segment the fastening function, with the first providing initial connection and the second providing enhanced rigidness support, allowing the thin housing to maintain structural integrity without increasing overall thickness
Solution Approach 2:
The second fastening structure is arranged inside the intermediate housing, nesting the fastening mechanism within the existing housing structure. This allows the fastening components to be integrated without increasing the external dimensions of the housing, maintaining portability while providing structural support
2Weight of moving object
If lightweight materials are used to decrease housing weight, then portability is improved, but the housing becomes easily transformed with small force
Solution Approach 1:
The fastening structure combines multiple materials with different properties: the elastic member provides flexible resilient force, the rotation hook provides mechanical engagement, and the support member provides rigid structural support. This composite approach allows lightweight housing materials to be used while the fastening structure compensates for the reduced material strength
Solution Approach 2:
The elastic member is pre-loaded to generate resilient force that acts in advance to counteract external forces before they can cause the housing to pop out or transform. This preliminary anti-action prevents the lightweight housing from being easily transformed by applying counter-force through the fastening mechanism
3Strength
If fastening structures are added to maintain housing rigidness, then structural integrity is improved, but the device complexity increases
Solution Approach 1:
The first and second fastening structures are merged in function, where the first fastening structure provides initial connection and the second provides enhanced support. Both structures work together as an integrated system to maintain housing rigidness, distributing the fastening function across two complementary mechanisms rather than one complex structure
Solution Approach 2:
The elastic member automatically generates resilient force to maintain fastening between the housing components without requiring external intervention. The rotation hook automatically engages with the support member to provide mechanical fastening, allowing the structure to self-maintain its integrity without additional control systems
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 fastening structure effectively maintains the structural integrity of thin and lightweight housings without compromising aesthetics or material type, ensuring secure fastening and reducing popping out.
Implementation Method 1
an elastic member having a first end connected to the fixing member and a second end connected to the rotation hook, and wherein the elastic member generates a torque that rotates the rotation hook relative to the fixing member
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
An electronic device is provided. The electronic device includes a first housing, a second housing rotatably connected to the first housing, a printed circuit board (PCB) arranged inside the first housing, a first fastening structure arranged in the PCB, and a second fastening structure arranged inside the rear cover to be fastened to the first fastening structure, wherein the first fastening structure includes a fixing member fixedly connected to the PCB, a rotation hook rotatably connected to the fixing member and configured to fasten to the second fastening structure, and an elastic member having a first end connected to the fixing member and a second end connected to the rotation hook, wherein the elastic member generates a torque that rotates the rotation hook relative to the fixing member in first direction or a second direction based on a fastening state of the second fastening structure to the rotation hook.