Split Plunger Contact for Stable Sliding Support
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Solution Overview
Problem
Existing contact technologies face issues with instability and inaccurate sliding due to changes in the inside diameter of coil springs, leading to potential contact failures, especially in high-integration circuit environments where precise operations are required.
Innovation Solution
A contact design featuring two plungers with tip end portions and sliding portions in halved shapes, supported by a compression coil spring that maintains stable sliding and electrical connection between electrodes, ensuring reliable contact characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the supporting bar portions are just supported by the coil spring, then the structure is simple, but the supporting bar portions become loose and unstable due to changes in inside diameter of the coil spring
Solution Approach 1:
The supporting structure is segmented into multiple functional components: the coil spring provides elastic support, while additional guiding structures (such as guide holes or guide grooves) provide precise positional constraints. This segmentation allows each component to specialize in one function, preventing the supporting bar portions from becoming loose while maintaining overall structural simplicity.
Solution Approach 2:
An intermediary guiding structure is introduced between the supporting bar portions and the coil spring. This intermediary component (such as a guide hole or guide groove) acts as a mediator that transmits the supporting force while maintaining precise positioning, thereby preventing looseness without requiring a completely complex support system.
2Duration of action of moving object
If the inside diameter of the coil spring changes due to elasticity, then the spring can function, but the contact pins cannot slide accurately and favorably
Solution Approach 1:
Different parts of the supporting structure have different functional qualities: the coil spring provides elastic compliance with variable inside diameter, while localized guiding structures (guide holes or guide grooves) provide precise positional constraints. This local quality differentiation allows the system to accommodate spring elasticity while maintaining sliding accuracy.
Solution Approach 2:
The solution moves from a one-dimensional spring support to a multi-dimensional constraint system. The coil spring operates in the radial dimension providing elastic support, while guide holes or guide grooves add constraints in the axial and angular dimensions, thereby maintaining sliding accuracy despite spring diameter changes.
3Ease of manufacture
If the contact structure uses just a coil spring for support, then the assembly is easy, but contact failure may occur due to looseness
Solution Approach 1:
The contact structure is segmented into independent functional modules: the coil spring module provides elastic support and easy assembly, while the guiding structure module provides stability and prevents contact failure. This segmentation maintains assembly ease while improving contact reliability through functional specialization.
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
The solution provides stable and accurate sliding support for the plungers, enhancing electrical contact reliability and reducing the likelihood of contact failures, thereby improving the overall performance of the electrical connecting apparatus.
Implementation Method 1
a compression coil spring covering outer circumferences of the first plunger and the second plunger overlapped with each other and supporting the respective plungers relatively slidably
Data Source
AI summary
Respective plungers are slidably supported in a stable manner without fluctuation, and reliable electrical contact is achieved.In a contact of the present invention, a first plunger and a second plunger include tip end portions provided on tip end sides, slidably supported, and contacting two respective members and sliding portions provided on proximal end sides, formed in halved shapes of the respective plungers, slidably overlapped with each other, and inserted in a compression coil spring. Each of the sliding portions is set to have a length to be slidably supported together with the tip end portion of the other plunger.