Inspection Jig Pitch Conversion Unit Contact Stability
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Solution Overview
Problem
Conventional inspection jigs with multiple contact points increase electrical resistance due to the number of contact points in the current path, leading to higher contact resistance values.
Innovation Solution
The inspection jig incorporates a pitch conversion unit that reduces the number of contact points by converting the pitch between adjacent contact terminals, utilizing a tubular body with helical spring portions and a protruding portion to establish a stable, three-point contact with the inspection target, thereby reducing electrical resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple contact points are used in the current path, then contact stability is improved, but electrical resistance increases
Solution Approach 1:
The patent merges the functions of multiple contact points into a single contact point by integrating the pitch conversion unit directly into the contact terminal structure. The tubular body with helical spring portions and protruding portion creates a unified three-point contact mechanism that eliminates intermediate contact points, thereby reducing electrical resistance while maintaining contact stability through the integrated design.
Solution Approach 2:
The pitch conversion unit is nested within the contact terminal structure, with the tubular body containing helical spring portions and the protruding portion extending from the tubular body. This nested configuration allows the pitch conversion function to be embedded within the contact structure itself, reducing the number of separate contact points and minimizing electrical resistance in the current path.
2Object-affected harmful factors
If pitch conversion unit is added to reduce contact points, then electrical resistance decreases, but device complexity increases
Solution Approach 1:
The patent combines the pitch conversion function with the contact terminal structure into a single integrated component. The tubular body with helical spring portions and protruding portion performs both pitch conversion and contact functions simultaneously, eliminating the need for separate pitch conversion units and reducing overall device complexity while maintaining low electrical resistance.
Solution Approach 2:
The contact terminal structure is designed to perform multiple functions: the tubular body provides structural support and electrical conduction, the helical spring portions provide biasing force and pitch conversion, and the protruding portion establishes the three-point contact. This multi-functional design reduces the need for separate components, thereby reducing device complexity while achieving low electrical resistance.
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 decreases the number of contact points, resulting in lower electrical resistance values and improved contact stability during inspections.
Implementation Method 1
The tubular body includes a spring portion that has a helical shape along a peripheral surface of the tubular body
Data Source
AI summary
An inspection jig includes contact terminals and a pitch conversion unit electrically connected to the contact terminals and configured to convert a first pitch between adjacent two of the contact terminals into a second pitch different from the first pitch. The contact terminals each include a tubular body that extends in an axial direction of the contact terminal and is electrically conductive, and a conductor that is electrically conductive and has a stick shape. The tubular body includes a spring portion that has a helical shape along a peripheral surface of the tubular body. The conductor includes an uninserted portion that protrudes from the tubular body toward a first side in the axial direction, and an inserted portion that is disposed in the tubular body and is fixed to a first axial end portion of the tubular body. The pitch conversion unit includes a board portion and a protruding portion.