PCB Housing Assembly With Resilient Flange PCB Retention
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Solution Overview
Problem
Existing PCB assembly processes face challenges in maintaining manufacturing tolerances and preventing deformation or strain during and after assembly, leading to damaged devices and increased costs.
Innovation Solution
A two-part enclosure design for a PCB housing, featuring a cover and housing main body with corresponding coupling members, including a resilient flange or bridge that clamps the PCB securely between a PCB retainer and receiver, distributing forces evenly to prevent deformation and strain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional PCB assembly processes are used, then manufacturing can proceed with standard methods, but PCB deformation and strain occur during and after assembly
Solution Approach 1:
The housing is divided into two separate parts: a cover and a housing main body. Each part has specific coupling members (retainer/receiver in the cover, contact portions in the housing body) that work together to secure the PCB. This segmentation allows independent optimization of each part's function while maintaining overall assembly integrity and reducing stress concentration on the PCB.
Solution Approach 2:
The coupling members are designed with specific local properties: the resilient flange provides localized elastic deformation capability at the bonding interface, while the retainer and receiver contact portions provide precise localized support points for the PCB. This local quality enhancement ensures that forces are distributed appropriately without causing PCB deformation.
2Ease of manufacture
If a resilient flange is used for bonding the cover to the housing body, then manufacturing flexibility improves, but the risk of full remelting and PCB contamination increases
Solution Approach 1:
The resilient flange acts as an intermediary element between the cover and housing main body during the bonding process. It mediates the bonding forces, allowing the cover to be secured to the housing body while preventing excessive heat and force from reaching the PCB, thus avoiding contamination while maintaining manufacturing flexibility.
3Strength
If the cover and housing body are securely coupled, then housing structural integrity improves, but PCB strain during assembly increases
Solution Approach 1:
The resilient flange is designed to provide beforehand cushioning during the assembly process. As the cover is bonded to the housing body, the flange elastically deforms to absorb excess bonding forces before they can be transmitted to the PCB. This prior cushioning effect protects the PCB from strain while allowing strong structural coupling of the housing.
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 design securely retains the PCB within the housing, reducing deformation and strain while maintaining manufacturing accuracy, and minimizing the risk of contamination and full remelting, allowing for a smaller housing size and reduced assembly complexity.
Implementation Method 1
the outwardly extending resilient flange or bridge is configured for contacting against an uppermost edge surface of the opening and welding thereto under tension
Implementation Method 2
contacting against an uppermost edge surface of the opening and welding thereto under tension
Implementation Method 3
the cover and housing body cooperate to retain the PCB within the housing between opposing forces supplied by the retainer/receiver contact portions
Data Source
Figure 1~4
Figure 5~7
AI summary
A PCB housing, e.g. for a camera module, includes a main body (13) and a cover (16). The cover includes a PCB retainer element (23) configured for contacting against a surface of a PCB (14) within the main body such that, when assembled, the PCB is retained securely in position. An outwardly extending resilient flange (22) of the cover interfaces with an uppermost edge surface (25) of an opening (21) to the main body, such that, when pressed (27) against and welded to the edge surface (25) a force is maintained onto the PCB by the PCB retainer (23).