Movable Contact Assembly Structure for Vibration-Stable Contactors
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Solution Overview
Problem
Existing electromagnetic contactors face issues with reduced contact reliability, susceptibility to arbitrary vibration, decreased rigidity, and complex assembly processes due to the movable contact's structure, which can lead to unintentional movement and structural integrity concerns.
Innovation Solution
A movable contact assembly with a support member surrounding the movable contact in multiple directions, coupled to a movable shaft, and a movable spring for elastic support, along with a housing design that includes a fixed contact and movable core to enhance stability and assembly convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the movable contact is made movable to enable opening and closing operation, then the operational flexibility is improved, but the contact reliability deteriorates due to unintentional movement
Solution Approach 1:
The movable contact is divided into a contact body and a contact arm, with the contact arm being movable and the contact body being relatively fixed during contact. This segmentation allows the contact arm to provide operational flexibility while the contact body ensures stable and reliable electrical contact.
Solution Approach 2:
The contact arm is preliminarily positioned and guided by the contact support member before making contact. This preliminary positioning ensures that the contact arm approaches the contact body in the correct orientation and position, preventing unintentional movement and ensuring reliable contact.
2Stability of the object's composition
If a sliding guide with complex structure is used to regulate rotational displacement, then the rotational control is improved, but the support reliability lowers
Solution Approach 1:
The rotational control function is extracted from a complex sliding guide structure and implemented through the geometric configuration of the contact support member and contact arm. The contact support member's opening shape and the contact arm's extension direction work together to regulate rotational displacement without requiring additional complex guiding components.
Solution Approach 2:
Instead of using a complex guide structure to prevent rotation, the design allows controlled rotation through the natural geometry of the support member and contact arm arrangement. The rotational displacement is regulated by the spatial relationship between components rather than by restrictive guiding mechanisms.
3Ease of manufacture
If the movable contact hole is formed in the shaft, then the movable contact installation is facilitated, but the shaft rigidity decreases
Solution Approach 1:
The movable contact is extracted from the shaft structure and mounted on the contact support member instead. This separates the contact function from the shaft, allowing the shaft to maintain its rigidity while the contact support member provides the necessary mounting functionality for easy contact installation and adjustment.
Solution Approach 2:
The contact support member acts as an intermediary between the shaft and the movable contact. It is coupled to the shaft and provides a dedicated mounting structure for the contact, eliminating the need to form holes in the shaft while maintaining both installation convenience and shaft rigidity.
4Reliability
If the contact support member surrounds the movable contact in multiple directions, then the contact reliability is improved, but the device complexity increases
Solution Approach 1:
The contact support member is designed with a universal structure that performs multiple functions: it supports the movable contact, regulates its positional displacement, guides its movement, and provides structural stability. This multi-functionality achieves reliable contact support without requiring multiple separate components, thus avoiding increased device complexity.
Solution Approach 2:
The contact support member features an opening-shaped structure that flexibly surrounds the movable contact in multiple directions. This open-frame design provides multi-directional support and stability while maintaining structural simplicity and avoiding excessive complexity compared to fully enclosed structures.
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
The solution improves contact reliability, suppresses arbitrary vibration, maintains structural rigidity, and simplifies assembly without requiring excessive structural changes, enhancing the overall performance and efficiency of the electromagnetic contactor.
Implementation Method 1
a movable spring arranged to elastically support the movable contact
Implementation Method 2
An electromagnetic contactor is a device which causes a contact between contacts by using a magnetic attractive force, which is generated by a current applied to an electromagnet
Data Source
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AI summary
Disclosed are a movable contact assembly and an electromagnetic contactor comprising same. The movable contact assembly according to an aspect of the present invention comprises: a movable contact provided so as to be movable in the direction toward a fixed contact and direction opposite to the fixed contact; a movable shaft which is coupled with a movable core so as allow moving together therewith, and which is coupled with the movable contact; and a movable contact support member coupled with the movable shaft and formed to at least partially surround the movable contact, wherein the movable contact is formed to have a length in one direction and a width in the other direction, and the movable contact support member may surround the movable contact along the other direction.