Inspection Jig Dual-Spring Probe Contact Stability
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Solution Overview
Problem
Existing inspection jigs experience unstable contact pressure when probing both electrodes and inspection objects, leading to inconsistent contact stability.
Innovation Solution
The inspection jig incorporates a dual-spring mechanism with an outer tubular body and an inner tubular body, where the outer spring biases the rear end portion for stable contact with the electrode, and the inner spring biases the tip portion for stable contact with the inspection object, using a central conductor to enhance contact area and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single spring part is used to bias both the electrode and inspection object, then the structure is simple, but contact stability becomes unstable due to variations in contact pressure
Solution Approach 1:
The single spring part is divided into two separate spring parts: a first spring part that biases the electrode and a second spring part that biases the inspection object. This segmentation allows independent optimization of contact pressure for each contact point, eliminating the instability caused by variations in contact pressure while maintaining reasonable structural complexity.
2Reliability
If a single spring part is used to bias both the electrode and inspection object, then the structure is simple, but contact stability becomes unstable due to variations in contact pressure
Solution Approach 1:
The single spring part is divided into two separate spring parts: a first spring part that biases the electrode and a second spring part that biases the inspection object. This segmentation allows independent optimization of contact pressure for each contact point, eliminating the instability caused by variations in contact pressure while maintaining reasonable structural complexity.
3Strength
If a rod-shaped member is fixedly bonded to the cylindrical member, then the structure is rigid, but contact stability deteriorates due to inability to compensate for pressure variations
Solution Approach 1:
The fixed bonding between the rod-shaped member and cylindrical member is replaced with a dynamic spring mechanism. The spring parts allow relative movement and elastic deformation, enabling the structure to dynamically compensate for variations in contact pressure and maintain stable contact, while still providing sufficient structural strength through the spring's elastic properties.
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 reduces variations in contact pressure and improves the stability and accuracy of electrical conduction, ensuring consistent and reliable inspections by maintaining stable contact with both the electrode and the inspection object.
Implementation Method 1
The outer tubular body includes an outer spring part configured to expand and contract along an axis of the outer tubular body and configured to bias the rear end portion
Implementation Method 2
The inner tubular body includes an inner spring part configured to expand and contract along an axis of the inner tubular body
Data Source
AI summary
An inspection jig may include: an electrode; a probe, the probe having a rear end portion and a tip portion to contact a bump; and a support member supporting the probe. The probe may include: an outer tubular body that is electrically conductive; and an inner tubular body that is electrically conductive, the inner tubular body being inserted into the outer tubular body. The outer tubular body may include outer spring parts to bias the rear end portion. The inner tubular body may include inner spring parts. The tip portion may be a first end of the inner tubular body, and protrudes from a first end of the outer tubular body. The support member may hold the outer tubular body such that the rear end portion is brought into contact with the electrode by the biasing force of the outer spring parts.