Press-fit Contact Deformable Portion Positioning
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Solution Overview
Problem
Press-fit contacts inserted into circuit board passageways deeper than the conductive wiring layer cause signal reflection, leading to disturbed high-speed signal transmission, and existing solutions either increase manufacturing costs through insert-molding or reduce positioning tolerance by shortening the contact length.
Innovation Solution
A contact with a press-fit portion and a deformable portion, where the deformable portion is plastically deformable and located opposite the press-fitting direction, allowing for accurate positioning by absorbing size errors and load variations, thus maintaining high accuracy even with short press-fit lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the press-fit contact is shortened to reduce signal reflection, then signal transmission quality is improved, but positioning tolerance decreases making accurate location difficult
Solution Approach 1:
The contact is divided into two functional segments: a press-fit portion for precise positioning in the passageway and a deformable portion for absorbing manufacturing errors. This segmentation allows the press-fit portion to be short (reducing signal reflection) while the deformable portion compensates for positioning tolerance issues.
Solution Approach 2:
The deformable portion is designed with specific material properties and geometric parameters that allow it to plastically deform and absorb size errors and load variations. By changing the parameters of this portion, the system maintains accurate positioning of the press-fit portion even when the overall contact length is reduced.
2Manufacturing precision
If insert-molding is used to create the press-fit contact to the correct length, then positioning accuracy is improved, but manufacturing costs increase
Solution Approach 1:
The contact structure is segmented into a press-fit portion and a deformable portion, where only the press-fit portion requires high precision manufacturing. The deformable portion can be manufactured with standard tolerances and will naturally deform to achieve proper positioning, eliminating the need for costly insert-molding processes.
Solution Approach 2:
The deformable portion acts as a sacrificial element that absorbs manufacturing errors through plastic deformation. This allows the use of simpler, cheaper manufacturing methods for this portion while maintaining overall positioning accuracy, reducing reliance on expensive insert-molding techniques.
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
Enables accurate positioning of the press-fit portion with reduced manufacturing costs and improved high-speed signal transmission by absorbing size and load errors through plastic deformation of the deformable portion, maintaining signal quality.
Implementation Method 1
The deformable portion is plastically deformable
Data Source
AI summary
A contact is disclosed. The contact has a press-fit portion and a deformable portion. The press-fit portion is press-fit into a passageway of a circuit board. The deformable portion is disposed adjacent the press-fit portion in a direction opposite a press-fitting direction and has a shape adjacent the press-fit portion larger than the passageway. The deformable portion is plastically deformable.