Rotating Contact Moving Element for Low Voltage Switching
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Solution Overview
Problem
Conventional low voltage switching devices face challenges with complex and costly assembly of moving contacts, inadequate insulation due to metal pins, and maintenance difficulties due to thermal and mechanical stress, leading to inefficient operation and insulation compromise.
Innovation Solution
A moving element for low voltage switching devices featuring a housing unit with an elastic element that interacts with electrical contacts to maintain position and pressure, eliminating the need for longitudinal pins and simplifying assembly, while ensuring stable contact and improved insulation through a pin-shaped portion rotating within a seat and a coupling portion interacting with the elastic element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal pins are used to fasten moving contacts to moving elements, then the assembly is mechanically stable, but the insulation between adjacent poles is compromised
Solution Approach 1:
The patent extracts and removes the metal pins from the assembly, replacing them with a plastic moving element that has integrated contact retention features. This eliminates the source of insulation problems while maintaining mechanical stability through alternative means such as recesses and elastic elements.
Solution Approach 2:
The patent employs composite construction by integrating multiple functions into a single plastic moving element that combines insulation properties with mechanical retention features. The plastic material provides both electrical insulation and structural stability, eliminating the need for separate metal pin components.
2Reliability
If complex joining means are used to connect moving contacts to moving elements, then the connection is secure, but the assembly and maintenance becomes difficult and costly
Solution Approach 1:
The patent merges the functions of contact retention, insulation, and structural support into a single integrated moving element. The plastic element includes built-in recesses and elastic components that securely hold contacts without requiring separate joining means, simplifying both assembly and maintenance.
Solution Approach 2:
The moving element serves multiple functions simultaneously: it provides electrical insulation, mechanically retains the moving contacts through integrated recesses, maintains contact pressure via elastic elements, and enables rotational movement. This multi-functionality eliminates the need for multiple separate components and joining operations.
3Reliability
If moving elements rotate about a fixed axis, then the switching operation is reliable, but the assembly of contacts becomes critical and difficult
Solution Approach 1:
Instead of rotating the entire moving element assembly about a fixed external axis, the patent inverts the approach by having individual contacts rotate within recesses of the moving element while the element itself remains relatively stable. This reverses the rotation mechanism from element-level to contact-level, simplifying assembly.
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 reduces assembly complexity and costs, enhances insulation, and stabilizes electrical contacts, resulting in a more reliable and efficient switching operation with reduced maintenance needs.
Implementation Method 1
each of which houses an elastic element which interacts with the electrical contact to maintain this in a pre-established position with respect to the relative housing unit and to adjust the contact pressure
Data Source
AI summary
The present invention relates to a moving element for a low voltage switching device and to a switching device comprising this moving element. The moving element according to the invention comprises for each pole a housing unit suitable to receive an elastic element which interacts with an electrical contact. This latter comprises a first contact portion susceptible to contact a further electrical contact and a second portion connectable to a conductive element of the switching device. The electrical contact comprises a pin shaped portion positioned rotating in a seat defined on the housing unit so as to configure a mutual rotation axis of the electrical contact with respect to the housing unit.