Electromagnetic Relay Contact Assembly for Higher Positional Accuracy
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Solution Overview
Problem
The existing electromagnetic relay designs face issues with positional accuracy of the movable contact piece due to dimensional and assembly errors in the two-member configuration of the movable member, affecting the reliability and precision of the relay's operation.
Innovation Solution
The electromagnetic relay is redesigned with a single-member movable member that includes a press portion and a support portion, allowing for improved positional accuracy by integrating these components and ensuring the movable contact piece and contact spring are inserted from the opposite side of the electromagnet block, with additional features like a return spring and base contact to enhance stability and prevent slipping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the movable member is composed of two members, then the ease of assembly of the movable contact piece and contact spring is improved, but the positional accuracy of the movable contact piece deteriorates due to dimensional errors and assembly errors
Solution Approach 1:
The patent merges the first member and second member into a single integrated movable member. This single member includes both the press portion (corresponding to the first member) and the support portion (corresponding to the second member), eliminating the need for separate assembly of two members and thereby resolving the contradiction between ease of assembly and positional accuracy.
2Ease of manufacture
If the movable contact piece and contact spring are inserted from the side opposite the electromagnet block, then the ease of assembly is improved, but the stability and prevention of slipping may be compromised
Solution Approach 1:
The patent introduces a second direction perpendicular to the insertion direction (first direction) to prevent slipping. The support portion extends in this second direction to constrain the movable contact piece, thereby maintaining stability while allowing insertion from the opposite side of the electromagnet block.
3Ease of manufacture
If the press portion and support portion are constituted by separate members, then the ease of assembly is improved, but the positional accuracy of the movable contact piece deteriorates
Solution Approach 1:
The patent integrates the press portion and support portion into a single movable member. The press portion is configured to be pressed by the movable iron piece, while the support portion supports the movable contact piece in the moving direction. This integration eliminates assembly errors between separate members and improves positional accuracy.
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 positional accuracy and ease of assembly, reduces tilting and wear, and improves the overall reliability of the movable contact piece's movement, leading to improved performance and reduced assembly complexities.
Implementation Method 1
an electromagnet block (4) that moves the movable member (9) in the moving direction
Implementation Method 2
A contact spring (10) is disposed in the movable member (9) and biases the movable contact piece (8) in the first direction
Data Source
AI summary
An electromagnetic relay includes a first fixed terminal, a second fixed terminal, a movable contact piece, a movable member, a contact spring, and an electromagnet block. The movable member is configured to move in a moving direction including a first direction and a second direction. The contact spring biases the movable contact piece in the first direction. The electromagnet block includes a movable iron piece and moves the movable member in the moving direction. The movable contact piece and the contact spring are disposed in the movable member by insertion from a side opposite to a side where the electromagnet block is located. The movable member includes a first member constituted by a single member. The first member includes a press portion to be pressed by the movable iron piece in accordance with rotation of the movable iron piece, and a support portion configured to support the movable contact piece.