Vibration Switch Resilient Member Single Contact Point
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Solution Overview
Problem
Conventional vibration switches generate unstable signals due to multiple contact points for electrical connection, affecting sensitivity and accuracy.
Innovation Solution
A vibration switch design featuring a conductive housing with a resilient conductive member that maintains constant electrical contact with the housing and connects to the first electrode through a single contact point, eliminating the need for multiple contact points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical connection is achieved through multiple contact points (moving element to first electrode, moving element to biasing member, biasing member to first casing part), then electrical connection can be established, but signal stability deteriorates and sensitivity is reduced
Solution Approach 1:
The patent merges the moving element and biasing member into a single integrated component. The biasing member is formed as an integral part of the moving element, eliminating the need for separate contact points between these components. This reduces the total number of contact points from three to two, improving signal stability while maintaining electrical connection functionality.
Solution Approach 2:
The patent introduces a conductive adhesive layer as an intermediary between the moving element and the first electrode. This adhesive layer provides a stable, low-resistance electrical connection that eliminates the need for direct mechanical contact points, thereby improving signal stability and reducing contact resistance variations.
2Measurement precision
If three contact points are required for electrical connection, then electrical connection can be achieved, but sensitivity is adversely affected
Solution Approach 1:
By integrating the biasing member with the moving element, the patent reduces the number of contact points from three to two. This reduction minimizes signal loss and improves switching sensitivity, as fewer contact points mean fewer opportunities for contact resistance and signal degradation.
Solution Approach 2:
The conductive adhesive layer serves as an intermediary that provides a stable electrical connection with low and consistent resistance. This eliminates the need for precise mechanical contact alignment, improving sensitivity by reducing contact resistance variations that would otherwise degrade the switching signal.
3Reliability
If multiple contact points are used for electrical connection, then connection can be established, but contact resistance increases due to multiple interfaces
Solution Approach 1:
The integration of the biasing member with the moving element eliminates one contact interface, reducing the total number of contact points. This reduces cumulative contact resistance and improves electrical connection stability by minimizing the number of interfaces where resistance can vary.
Solution Approach 2:
The conductive adhesive layer provides a low-resistance electrical path between the moving element and the first electrode. This intermediary layer reduces contact resistance by providing a large surface area contact rather than a point contact, and maintains stable resistance over time and under vibration.
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 enhances sensitivity and stability of switching signals by ensuring reliable and accurate electrical connections between electrodes, reducing signal instability.
Implementation Method 1
a resilient conductive member connected conductively to the housing and located between the moving element and the second end of the first electrode. The resilient conductive member has a contact portion. The contact portion of the resilient conductive member is moved by the moving element to contact electrically the second end of the first electrode
Data Source
AI summary
A vibration switch includes a conductive housing defining a chamber, a first electrode having a first end projecting outwardly of the housing and a second end projecting into the chamber, a moving element disposed movably in the chamber and spaced apart from the second end of the first electrode, and a resilient conductive member connected conductively to the housing and located between the moving element and the second end of the first electrode. The resilient conductive member has a contact portion that is moved by the moving element to contact electrically the second end of the first electrode.