Electromagnetic Relay Magnet Holder for Impact Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electromagnetic relays face issues where the magnet, attached to a yoke and not fixed to a contact case or cover, can move upon impact, affecting the relay's operation.
Innovation Solution
The magnet is held by a magnet holding member made of resin with a flexible portion that deforms to provide elastic force, minimizing movement relative to the contact case.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the magnet is attached to the yoke without being fixed to the contact case, then the device complexity is reduced, but the magnet may move upon impact affecting relay operation
Solution Approach 1:
The magnet holding member is pre-installed on the contact case with its flexible portion already in a deformed state, creating preliminary elastic force that holds the magnet in position before any impact occurs. This preliminary action ensures the magnet is secured without requiring complex additional fixing structures.
Solution Approach 2:
The magnet holding member acts as an intermediary element between the contact case and the magnet. It transfers the holding function from the yoke to the contact case through its flexible portion, which uses elastic deformation to secure the magnet without direct rigid connection, thus maintaining reliability while simplifying the overall structure.
2Reliability
If the magnet is fixed with a sealing member, then the magnet stability is improved, but the manufacturing cost increases
Solution Approach 1:
The magnet holding member is designed as a simple, inexpensive resin component that can be easily manufactured and replaced if needed. Its flexible portion provides sufficient holding capability through elastic deformation without requiring expensive sealing materials or complex assembly processes, thus maintaining magnet stability while keeping manufacturing costs low.
Solution Approach 2:
The flexible portion of the magnet holding member utilizes changes in its physical parameters (elastic deformation) to achieve magnet retention. By changing the shape and rigidity parameters of the resin holding member, it can securely hold the magnet through elastic force without requiring additional sealing members or complex fixing mechanisms, thereby reducing manufacturing cost while maintaining stability.
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 reduces magnet movement during impacts, maintaining relay operation without increasing manufacturing costs, and simplifies the design by reducing parts.
Implementation Method 1
The magnet holding member includes a flexible portion. The magnet holding member is configured to hold the magnet as the flexible portion deforms.
Data Source
AI summary
An electromagnetic relay includes a first fixed terminal, a movable contact piece, a contact case, a magnet, and a magnet holding member. 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 contact case includes a first fixed contact and a movable contact piece. The magnet generates a magnetic field inside the contact case. The magnet holding member is comprised of resin. The magnet holding portion includes a flexible portion. The magnet holding member holds the magnet as the flexible portion deforms.