Electromagnetic Relay Conductive Plate Current Conveyance
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Solution Overview
Problem
Conventional electromagnetic relays face challenges in efficiently conveying current and heat from enlarged contacts to the movable spring or conductive plate, leading to reduced current-carrying capacity due to protrusion issues.
Innovation Solution
The design incorporates a conductive plate positioned between the movable spring and the contacts, with the conductive plate's leg parts inserted into through-holes of both the spring and the plate, ensuring the contact surface is in contact with the plate without protruding from its edge, allowing efficient current and heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the contact size is increased to improve current-carrying capacity, then the current-carrying capacity is improved, but the contact protrudes from the movable spring or conductive plate causing inefficient current and heat conveyance
Solution Approach 1:
The patent introduces a conductive plate as an intermediate layer between the movable spring and the contact. This adds a dimensional layer to the structure, allowing the contact to be larger for higher current capacity while the conductive plate ensures efficient current and heat conveyance to the movable spring, resolving the protrusion issue.
Solution Approach 2:
The conductive plate serves as an intermediary component between the contact and the movable spring. It mediates the transmission of current and heat from the enlarged contact to the movable spring, ensuring efficient conveyance even when the contact size is increased, thus solving the protrusion problem.
2Reliability
If the contact size is increased to improve current-carrying capacity, then the current-carrying capacity is improved, but the size of the movable spring or conductive plate must be increased
Solution Approach 1:
The patent segments the current and heat transmission function into two separate components: the movable spring provides mechanical movement and basic conduction, while the conductive plate handles the bulk of current and heat transmission from the enlarged contact. This segmentation allows the movable spring to remain compact while the contact can be larger for higher current capacity.
Solution Approach 2:
By inserting the conductive plate as an intermediate layer, the patent creates a multi-layer structure that allows the contact to be larger without proportionally increasing the size of the movable spring. The conductive plate absorbs the additional current-carrying requirement, enabling the movable spring to maintain a compact size.
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 current-carrying capacity of the relay by effectively conveying current and heat from the contacts to the conductive plate, improving performance without increasing the size of the movable spring or conductive plate.
Implementation Method 1
the conductive plate is disposed between the head part and the movable spring... effectively conveying current and heat from the contacts to the conductive plate
Implementation Method 2
effectively conveying current and heat from the contacts to the conductive plate, improving performance
Data Source
AI summary
An electromagnetic relay including: a fixed terminal that includes a fixed contact; a movable spring that includes a movable piece on which a first through-hole is formed; a conductive plate that includes a second through-hole; a movable contact that includes a head part that is in contact with and is separated from the fixed contact, and a leg part that is inserted into the first through-hole and the second through-hole; wherein the conductive plate is disposed between the head part and the movable spring, in a radial direction of the first through-hole and the second through-hole, the head part does not protrude from an outer edge of the conductive plate but protrudes from the outer edge of the movable piece.