Electromagnetic Relay Insulating Rib Design
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Solution Overview
Problem
The electromagnetic relay has a short insulation distance between the magnetic pole portion of the stacked iron core and the fixed contact, resulting in low insulating properties.
Innovation Solution
Incorporating an insulating rib on the inward or outward facing surface of the spacer or flange portion of the electromagnetic relay, which intercepts the straight line connecting the magnetic pole and the fixed contact, thereby increasing the insulation distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the magnetic pole portion and fixed contact are positioned close to each other for compact design, then the device size is reduced, but the insulation distance becomes short resulting in low insulating property
Solution Approach 1:
An insulating rib is introduced as an intermediary element between the magnetic pole portion and the fixed contact. This rib projects from either the spacer or flange portion and physically intercepts the straight line connecting these two components, thereby increasing the insulation distance without requiring larger overall device dimensions. The insulating rib acts as a mediator that maintains electrical isolation while allowing compact positioning of the magnetic pole and fixed contact.
2Reliability
If the insulation distance is increased to improve insulating property, then the insulating performance is enhanced, but the device size increases
Solution Approach 1:
Instead of uniformly increasing the distance between the magnetic pole portion and fixed contact throughout the entire device, the insulating rib provides localized insulation enhancement only where needed. The rib projects specifically to intercept the straight line connection between these components, concentrating the insulation function in a localized area rather than requiring overall device enlargement. This allows compact device dimensions while achieving adequate insulation distance at the critical interface.
3Reliability
If additional insulation structures are added to increase insulation distance, then the insulating property is improved, but the device complexity increases
Solution Approach 1:
The insulating rib is merged with existing structural components of the relay, specifically either the spacer or the flange portion. By integrating the insulation function into these existing parts rather than adding separate dedicated insulation components, the design achieves improved insulating property without proportionally increasing device complexity. The insulating rib becomes a multi-functional element that both supports structural integrity and provides electrical isolation.
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 enhances the insulating properties of the electromagnetic relay by increasing the insulation distance between the magnetic pole and the fixed contact, resulting in a relay with improved insulating performance.
Implementation Method 1
an insulating rib is formed in a projecting manner on at least one of an inward facing surface of a spacer integrally formed with the movable iron piece and an outward facing surface of the flange portion such that the insulating rib intercepts a straight line which connects a magnetic pole portion which is one end portion of an iron core which projects from the through hole and the fixed contact or the fixed contact terminal with a shortest distance
Implementation Method 2
an electromagnet block having a spool in which a through hole opening at a flange portion is formed, she electromagnet block being mounted on an upper surface of the base; a movable iron piece configured to be rotatable based on excitation and non-excitation of the electromagnet block
Data Source
AI summary
An electromagnetic relay includes a base, an electromagnet block having a spool with a through hole opening at a flange portion thereof and mounted on an upper surface of the base, a movable iron piece, a movable contact piece rotatable integrally with the movable iron piece, a movable contact fixed to a free end of the movable contact piece, and a fixed contact fixed to a fixed contact terminal and contactable with and separable from the movable contact along with rotation of the movable contact piece. Insulating ribs project from an inward facing surface of a spacer integrally formed with the movable iron piece and an outward facing surface of the flange portion respectively such that the insulating ribs intercept a straight line connecting a magnetic pole portion projecting through the through hole and the fixed contact or the fixed contact terminal with a shortest distance.