Relay Insulation Base Recess Layout for Arc Extinguishing
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Solution Overview
Problem
Existing electromagnetic relays face issues with ineffective arc extinguishing due to limited electric arc length, component complexity increasing costs, and poor mechanical strength leading to wear and safety risks.
Innovation Solution
An insulation base with recesses on the bottom wall of the arc extinguishing chamber to increase electric arc length, integrated arc extinguishing magnets, and a unified insulator-movable leaf spring structure to enhance arc extinguishing efficiency and reduce component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the movable contact is positioned close to the bottom wall to increase the length of the movable leaf spring, then the spring length is improved, but the electric arc length is reduced making arc extinguishing ineffective
Solution Approach 1:
The arc extinguishing chamber is segmented by adding recesses on its bottom wall, creating distinct arc pulling regions that extend the arc path without requiring the movable contact to be positioned lower, thus maintaining both spring length and arc extinguishing effectiveness
Solution Approach 2:
Instead of extending arc length vertically by moving the contact closer to the bottom wall, the invention uses horizontal recesses on the bottom wall to create an extended arc path in the horizontal dimension, achieving arc length extension without compromising spring length
2Reliability
If separate connection pieces are used to join the movable leaf spring and insulator, then the electrical isolation is improved, but the device complexity and cost increase
Solution Approach 1:
The insulator and movable leaf spring are merged into a single integrated component, with the insulator forming part of the movable leaf spring structure itself, eliminating the need for separate connection pieces while maintaining electrical isolation through the insulating material properties
Solution Approach 2:
The integrated insulator-movable leaf spring component performs multiple functions simultaneously: providing electrical isolation, maintaining mechanical elasticity, and serving as the connection element, thereby reducing component count without compromising functionality
3Ease of manufacture
If the reset leaf spring is fixed to the partition wall made of plastic, then the installation is simplified, but the mechanical strength and wear resistance deteriorate causing safety risks
Solution Approach 1:
The partition wall is constructed using composite materials or metal materials with superior mechanical strength and wear resistance, while maintaining ease of installation through integrated fixing structures, thereby eliminating the weakness of plastic materials
Solution Approach 2:
The fixing mechanism is redesigned to reduce mechanical stress on the partition wall, possibly using elastic fixing structures or distribution mechanisms that prevent concentration of forces, thereby preventing wear and rupture even with simplified installation
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
Enhances arc extinguishing effectiveness, reduces component complexity, and improves mechanical durability, thereby ensuring safer and more efficient relay operation.
Implementation Method 1
When extinguishing the electric arc with magnetic force, the length of the electric arc pulled down between the movable contact and the static contact is limited
Implementation Method 2
an electric arc between a static contact and a movable contact of the relay can be pulled down into the recess to increase a length of the electric arc
Data Source
AI summary
An insulation base adapted to be installed into a bottom opening of a housing of a relay includes a peripheral wall, a bottom wall connected to a bottom of the peripheral wall, and a partition wall. The partition wall is connected to the peripheral wall and the bottom wall. The partition wall divides an internal space defined by the housing and the insulation base into a containment chamber and an arc extinguishing chamber. Two recesses are formed on the inner side of the bottom wall of the arc extinguishing chamber, so that an electric arc between a static contact and a movable contact of the relay can be pulled down into the recess to increase a length of the electric arc.