Electrical Terminal Snap Retention for Solder-Free PCB Assembly
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Solution Overview
Problem
Existing electrical terminals for electronic devices face issues such as complex installation processes like insert molding and soldering, which pose health risks and increase manufacturing time and costs, and are prone to decoupling due to weak bonds with the housing and circuit board.
Innovation Solution
The electrical terminal design features a main body with a shoulder and a pivotable flag snap, allowing for easy installation without insert molding or soldering, and includes a compressible contact that secures within an orifice of the circuit board, along with shoulders and flag snaps to prevent movement, ensuring stable connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If insert molding and soldering are used to attach electrical terminals, then the connection strength is improved, but the manufacturing complexity and health risks increase
Solution Approach 1:
The patent replaces complex chemical bonding processes (insert molding and soldering) with a simple mechanical retention system. The electrical terminal uses a retention rib that fits into a retention groove, creating a mechanical interlock that secures the terminal without requiring molding or soldering operations. This mechanical system eliminates the need for complex manufacturing processes while maintaining connection strength.
2Strength
If insert molding and soldering are used to attach electrical terminals, then the connection strength is improved, but the manufacturing time and costs increase
Solution Approach 1:
The mechanical retention system eliminates time-consuming insert molding and soldering operations. The terminal can be simply inserted and retained through the rib-groove mechanism, dramatically reducing assembly time and enabling faster production cycles without compromising connection strength.
3Reliability
If traditional bonding methods are used, then the electrical terminal is securely attached, but the risk of decoupling due to weak bonds increases
Solution Approach 1:
The retention system is divided into two functional segments: a retention rib on the electrical terminal and a corresponding retention groove in the housing. This segmentation creates a complementary mechanical interlock where the rib fits into the groove, preventing decoupling through a geometric constraint rather than relying on bond stability.
4Strength
If complex installation processes are used, then the connection strength is improved, but the ease of installation deteriorates
Solution Approach 1:
The complex multi-step processes of insert molding and soldering are replaced with a simple mechanical insertion process. The electrical terminal with its retention rib can be directly inserted into the housing with the retention groove, achieving secure attachment through a single straightforward action without requiring specialized equipment or skills.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3
AI summary
An electrical terminal includes a main body that extends along a plane. The electrical terminal includes at least one shoulder extending away from the main body. The electrical terminal includes a flag snap positioned downward from the at least one shoulder. The electrical terminal can be installed within an electronic device. The electronic device includes a housing and a circuit board positioned within the housing.