Electromagnetic Relay Structure for Magnet Vibration Isolation
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Solution Overview
Problem
Conventional electromagnetic relays experience vibration transmission from the magnet to the fixed terminal, which can adversely affect their operation.
Innovation Solution
The electromagnetic relay design separates the contact case holding the fixed terminal from the magnet holding member, using a distinct magnet holding member to isolate the magnet's vibration, with the magnet being sandwiched by walls to prevent movement and reduce vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the magnet is held by a common member with the fixed terminal, then the structure is simpler, but the vibration of the magnet is transmitted to the fixed terminal
Solution Approach 1:
The holding member is divided into two separate members: a contact case holding the fixed terminal and a magnet holding member holding the magnet. This segmentation isolates the magnet's vibration from the fixed terminal, preventing vibration transmission while maintaining structural simplicity through modular design.
Solution Approach 2:
The magnet holding member is extracted as a separate component from the contact case. By taking out the magnet holding function from the common member, the vibration path is broken, allowing the magnet to be isolated from the fixed terminal while keeping the overall structure relatively simple.
2Reliability
If the magnet holding member is a separate member from the contact case, then vibration transmission is reduced, but the number of parts increases
Solution Approach 1:
The magnet holding member is merged with the outer case as an integral structure. This combining approach reduces the number of separate parts while maintaining the vibration isolation benefit, as the magnet holding function is integrated into the existing outer case structure rather than being a completely separate component.
Solution Approach 2:
The outer case serves multiple functions: it provides structural enclosure and simultaneously acts as the magnet holding member. This multi-functionality reduces the total number of parts needed, as the outer case fulfills both protective and magnetic component support roles.
3Reliability
If the first wall is disposed between the first fixed terminal and the magnet, then vibration transmission is blocked, but the space arrangement becomes more complex
Solution Approach 1:
The first wall is extended from the outer case in a direction perpendicular to the main body, creating a spatial separation between the magnet and fixed terminal. This dimensional approach blocks vibration transmission paths while maintaining a relatively compact overall arrangement by utilizing vertical or lateral space efficiently.
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 design effectively reduces the transmission of magnet vibration to the fixed terminal, minimizing malfunctions and maintaining arc breaking performance.
Implementation Method 1
The magnet is disposed apart from the contact case and is configured to generate a magnetic field inside the contact case
Data Source
AI summary
An electromagnetic relay includes a contact case, a first fixed terminal, a movable contact piece, a magnet and a magnet holding member. The first fixed terminal is held by the contact case. The first fixed terminal includes a first fixed contact. The movable contact piece includes a first movable contact disposed to face the first fixed contact. The magnet is disposed apart from the contact case for generating a magnetic field inside the contact case. The magnet holding member is a separate member from the contact case and holds the magnet.