Double-armature relay opposing comb movement
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Solution Overview
Problem
Electromagnetic double-armature relays face issues with accidental contact between contact rivets and failure to return to original position due to external factors like vibrations and impacts, which can lead to malfunction and reliability concerns, especially in security applications.
Innovation Solution
The design features opposing translational movements of combs and contact bridges with contact rivets oriented in opposite directions, ensuring a closed circuit only when combs move oppositely, and includes a compact structure with J-shaped yokes and curved armatures to resist external forces, along with spring sheets for automatic return and shielding to prevent interference between contact bridges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two contact rivets are brought together by armature movement to establish electrical contact, then the relay achieves compact design and reduced coil power loss, but the contact rivets may accidentally come into contact or fail to return to original position due to vibrations and impacts
Solution Approach 1:
The spring element is pre-loaded to exert a separating force on the contact rivets, creating a preliminary counter-action that prevents accidental contact. This pre-loaded spring force ensures that contact rivets remain separated unless deliberately brought together by armature movement, and guarantees their return to the separated position after actuation, even under vibrations and impacts.
Solution Approach 2:
The spring element acts as a cushioning mechanism that absorbs and compensates for external disturbances such as vibrations and impacts. By incorporating this elastic element beforehand, the system is prepared to maintain reliable contact separation and return functionality despite external harmful factors.
2Volume of moving object
If contact rivets are positioned close together for compact design, then space is reduced, but the risk of accidental contact and welding increases
Solution Approach 1:
The spring element continuously exerts a separating force on the contact rivets, creating a preliminary counter-action that prevents accidental contact. This ensures that even when contact rivets are positioned close together for compact design, they remain reliably separated unless deliberately actuated, and automatically return to separation after contact.
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 relay's resistance to vibrations and impacts, ensuring reliable operation and a compact design while preventing accidental contact and maintaining functionality under external forces, thus improving reliability and compactness.
Implementation Method 1
electromagnetic double-armature relay, in which, by energizing the coil, both armatures pivot
Implementation Method 2
spring sheets for automatic return
Data Source
AI summary
An electromagnetic double-armature relay with an excitation coil comprises a first yoke and a second yoke, which are arranged on the excitation coil. The first leg of the first yoke serves as a support for a first armature and the first leg of the second yoke serves as a support for a second armature. The double-armature relay has a first comb which cooperates with the first armature, and a second comb cooperates with the second armature. In addition, the double-armature relay has at least two contact bridges, each of which is detachably arranged with a first end in the first comb and the second end in the second comb and comprises two contact rivets oriented in opposite directions, and fixed contacts which are arranged opposite the contact rivets of the contact bridge. The arrangement of the two yokes and armatures are such that the two combs perform opposing translational movements.