Press-fit Terminal Circuit Board Deformation via Integrated Housing Support
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Solution Overview
Problem
Conventional electronic device assembly methods require additional processes to prevent circuit board deformation and increase assembly complexity, particularly when press-fitting terminals into through holes, as they often necessitate external forces and additional steps for affixing and removing support members.
Innovation Solution
The electronic device incorporates a circuit board with through holes and lands, where press-fit terminals are connected using elastic deformation, and a support member is positioned between the circuit board and housing to prevent deformation, eliminating the need for external forces and additional assembly steps by integrating the support member between the rear surface and housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a circuit board jig is used to support the printed circuit board during terminal press-fitting, then circuit board deformation is restricted, but additional assembly processes (affixing and removing the jig) are required
Solution Approach 1:
The support member is integrated with the housing structure, merging two previously separate components (support member and housing) into one. This eliminates the need for separate affixing and removal processes while maintaining the circuit board support function during terminal press-fitting.
Solution Approach 2:
The housing structure provides built-in support for the circuit board during assembly through the integrated support member, eliminating the need for external support devices. The housing serves dual purposes: as the main enclosure and as the support structure during assembly.
2Strength
If external force is applied to affix the circuit board jig onto the printed circuit board, then the jig can support the circuit board, but the assembly process becomes more complex
Solution Approach 1:
By integrating the support member with the housing, the patent eliminates the need for separate affixing operations. The support member becomes an inherent part of the housing structure, providing holding force without requiring external fastening processes.
3Stability of the object's composition
If the circuit board jig is affixed to the printed circuit board and housing using adhesive material or screws, then the jig remains fixed, but additional affixation processes are required
Solution Approach 1:
The support member and housing are designed as integrated components, eliminating the need for adhesive materials or screws. The structural integration provides inherent fixation while simplifying the assembly process.
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 effectively restricts circuit board deformation during terminal press-fitting, simplifies the assembly process by omitting external force applications and support member affixation/removal steps, and reduces assembly complexity while preventing potential short circuits due to insulative material usage.
Implementation Method 1
connected to the land by application of a counter force caused by elastic deformation
Data Source
AI summary
A circuit board has a through hole extending from a front surface to a rear surface. A press-fit terminal is press-fitted from the front surface into the through hole and is connected to a land, which is formed on a wall surface of the through hole. A support member supports the rear surface of the circuit board when the press-fit terminal is press-fitted into the through hole. A housing has a bottom portion and an opening, which is on the opposite side of the bottom portion. The circuit board is affixed to the housing to cover both the opening and the support member. The support member is held and interposed between the rear surface and an inner surface of the bottom portion.