Electromagnetic Relay Card Guide Rail Dust Reduction
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Solution Overview
Problem
Conventional electromagnetic relays face issues with dust generation due to scratches and rubbing of the card when it is held to the movable contact part and slides, leading to potential contact failures.
Innovation Solution
The electromagnetic relay design includes a base with a rail portion to guide the card, a stopper portion to prevent disengagement, and a card with slide portions that reciprocate along the rail, minimizing contact with the movable contact portion and reducing dust generation by ensuring smooth sliding and secure fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the card is held to the movable contact part and movable iron armature using guide shafts and fixation projections, then the card is securely fixed, but the card surface is scratched causing dust generation
Solution Approach 1:
A guide groove is introduced as an intermediary structure between the guide shaft and the card. The guide shaft fits into the guide groove rather than directly contacting the card surface, allowing the card to be securely guided while preventing scratch-induced dust generation on the card surface.
2Ease of operation
If the card slides to move the movable contact, then the contact switching function is achieved, but rubbing causes dust generation
Solution Approach 1:
The guide groove acts as a mediator that facilitates the sliding motion of the card along the guide shaft. This intermediary structure enables smooth movement for contact switching while preventing direct frictional contact between the card surface and guide shaft that would cause rubbing-induced dust.
3Stability of the object's composition
If the card is tightly held to ensure smooth sliding, then sliding stability is improved, but friction increases causing more dust
Solution Approach 1:
The guide groove provides a stable interface for the guide shaft while maintaining controlled friction. The groove structure ensures the card remains stable during sliding motion without requiring excessive holding force, thereby reducing friction-induced dust generation while maintaining sliding 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 design effectively prevents dust generation from scratches and rubbing, enhancing the reliability and longevity of the electromagnetic relay by ensuring smooth operation and secure card fixation.
Implementation Method 1
an electromagnet block switched between an excitation state and a non-excitation state, and an armature configured to reciprocate when the electromagnet block is switched
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An electromagnetic relay (1) includes a base (200), an electromagnet block (30) fixed to the base (200), an armature (40) which reciprocates when the electromagnet block (30) is switched between an excitation state and a non-excitation state, and a card (50) which slides in association with the movement of the armature (40). The base (200) includes a rail portion (290) which guides the card (50) upon sliding, and the card (50) includes a slide portion (511) which slides along the rail portion (290). The rail portion (290) includes a stopper portion (291) which prevents disengagement of the slide portion (511) from the rail portion (290).