Parallel Electromagnetic Relay with Vertical Contact Springs
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Solution Overview
Problem
Conventional electromagnetic relays for forward reverse control require a large base size and have differences in spring constants due to varying lengths of moving contact springs, leading to increased mounting space and complex coil resistance designs.
Innovation Solution
The electromagnetic relay design features a housing with first and second electromagnet units oriented parallel to each other, with moving contact springs overlaid vertically and component parts like yokes integrated for electrical connection, allowing for independent excitation and contact switching without dedicated wiring, thus reducing base size and spring constant differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two electromagnetic relays are used for forward reverse control, then reliable control functionality is achieved, but mounting space increases and integration complexity increases
Solution Approach 1:
The patent combines two electromagnetic relays into a single integrated relay unit with a common base, housing, and shared structural components. The first and second electromagnetic units are mounted on the same base with their coil terminals electrically connected to terminal plates, allowing both relays to occupy a single mounting location rather than requiring separate installations.
Solution Approach 2:
The integrated relay unit performs multiple functions within a single device: it provides both forward control (through the first electromagnetic unit) and reverse control (through the second electromagnetic unit), while also providing a common mounting structure, shared housing, and unified terminal connection system that would otherwise require separate components.
2Ease of operation
If moving contact springs of different lengths are used for independent contact switching, then independent control is achieved, but spring constant differences increase and design complexity increases
Solution Approach 1:
The patent employs asymmetric spring constant values for the first and second moving contact springs, with the first spring having a different spring constant than the second spring. This asymmetric design allows each spring to be optimized for its specific contact switching requirements while maintaining independent control capability.
Solution Approach 2:
Each moving contact spring is designed with locally optimized properties - the first moving contact spring has a spring constant tailored to the first electromagnetic unit's characteristics and contact requirements, while the second moving contact spring has a different spring constant optimized for the second electromagnetic unit's specific needs, allowing independent control without compromising overall system performance.
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 achieves a smaller mounting area and identical spring constants for moving contact springs, simplifying the design and reducing production costs while maintaining reliable forward reverse control functionality.
Implementation Method 1
When a control voltage is applied to a coil terminal 2d of the first electromagnetic relay 2, a coil 2f of the first electromagnetic relay 2 is excited to change the position of the contact 2e
Data Source
AI summary
It is intended to provide an electromagnetic relay which resolves problems of large base size and difference in spring constant. In a facing gap defined between a pair of electromagnet units disposed on a base in parallel to each other and with shaft lines being oriented to an identical direction, a pair of moving contact springs overlaid along a vertical direction on the base and an A-fixed terminal unit and a B-fixed terminal unit provided with a plurality of contacts to which contacts of the moving contact springs selectively contact depending on excitation/non-excitation states of the electromagnetic units are housed. At least one of component parts of the respective electromagnetic units are included in electromagnetic connection passages between the moving contact springs and C-terminals.