Circuit Board Connector Housing That Blocks Test Finger Entry
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Solution Overview
Problem
Existing circuit board electrical connectors face challenges in preventing electrical shock during testing due to the contact of test fingers with terminals, as the mating portion is movable and gaps allow the test finger to push into the elastic portions of the terminals.
Innovation Solution
The circuit board electrical connector features a design with fixed-side and moving-side side walls that include prevention portions to prevent the test finger from entering the gaps, and the elastic portions are positioned away from the contact with the mating surfaces, and the elastic portions are positioned away from the potential contact points, ensuring the test finger does not engage with the terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mating portion is made movable to allow relative movement between fixed and moving housings, then the connector can accommodate misalignment and maintain contact reliability, but gaps are formed that allow test fingers to push into elastic portions during testing, causing electrical shock
Solution Approach 1:
The housing is divided into fixed and moving portions, with the mating portion separated into a distinct movable component. This segmentation allows the mating portion to move independently to accommodate misalignment while maintaining contact reliability, and the fixed housing can provide stable mounting and testing surfaces.
Solution Approach 2:
An intermediary structure is introduced where the mating portion acts as a mediator between the fixed housing and the connector contacts. This intermediary can move to absorb misalignment while the fixed housing provides a stable reference frame for testing, preventing test fingers from reaching the elastic portions.
2Object-affected harmful factors
If the fixed-side side walls extend further toward the mating side, then the prevention portions can block test fingers from entering gaps, but the overall connector size increases
Solution Approach 1:
The fixed-side side walls are extended locally only at the mating side where prevention portions are needed, rather than extending the entire housing structure. This localized extension provides the necessary test finger blocking function while minimizing the overall volume increase of the connector.
Solution Approach 2:
The prevention portions utilize the width direction dimension by extending fixed-side side walls outward, creating a three-dimensional blocking structure. This allows effective test finger prevention without significantly increasing the length or height of the connector, thus controlling overall size.
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 design effectively prevents electrical shock by ensuring the test finger does not contact the terminals, while maintaining a compact assembly size and preventing the test finger from contacting the terminals, thus enhancing safety and reliability.
Implementation Method 1
each of the elastic portions is configured to be elastically displaceable in such a manner as to allow relative movement of the moving housing
Data Source
AI summary
Provided is a circuit board electrical connector including: terminals; a fixed housing; and a moving housing, the moving housing includes: a pair of moving-side side walls; a receiving portion capable of receiving a counterpart connector, and a pair of restricted portions, the fixed housing includes a pair of fixed-side side walls located outward of the pair of moving-side side walls, end portions of the pair of fixed-side side walls extend further toward a mating side than end portions of the pair of moving-side side walls, each of the terminals includes a connecting portion, a contact portion, and an elastic portion, the contact portions are placed in such a manner as to face the receiving portion on opposing surface sides of the pair of moving-side side walls, and each of the elastic portions is provided to either of the pair of restricted portions on a side opposite to the mating side.