Electric Connection Box Guide Wall Protrusion Vibration
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Solution Overview
Problem
Conventional electric connection boxes experience wear and bending of relay and trunk terminals due to vibration, leading to reduced contact pressure and reliability, especially when heavy electric components move within the box.
Innovation Solution
The electric connection box incorporates guide walls with upper and lower protrusions that extend towards the electric component, providing three-point mounting and flexibility to prevent movement, ensuring stable retention and maintaining contact pressure between terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If guide walls are made rigid for easy molding, then manufacturing is easier, but relay movement is not prevented
Solution Approach 1:
The guide walls are designed with flexibility to bend outwardly, transforming from a static rigid structure to a dynamic structure that can adapt during relay attachment while still preventing harmful movement. The guide walls remain flexible enough to allow controlled deformation but provide sufficient constraint to prevent relay terminals from moving excessively.
2Ease of manufacture
If guide walls are tapered for easy molding, then manufacturing is easier, but relay swings inside the guide walls causing accelerated wear
Solution Approach 1:
The guide walls have non-uniform protrusions at different locations - upper protrusions extend further toward the relay than lower protrusions. This creates different constraint characteristics at different heights, preventing relay swinging motion while still allowing the guide walls to be tapered for easy molding. The localized variation in protrusion extent provides precise control over relay positioning.
3Ease of operation
If locking frames are flexible for easy attachment, then ease of operation is improved, but relay movement during vibration is not prevented
Solution Approach 1:
The guide walls are divided into multiple protrusions (upper and lower) that work together to constrain relay movement. The upper protrusions prevent backward and forward movement, while lower protrusions prevent side-to-side movement. This segmented approach to constraint provides comprehensive protection against vibration-induced movement while maintaining flexible attachment.
Data Source
AI summary
An electric connection box having a main body, a guide wall disposed on the main body for retaining an electric component in a final connected state, and a protrusion disposed on an inner face of the guide wall for preventing movement of the electric component. The guide wall has flexibility and the protrusion contacts with the electric component, with the guide wall being bent outwardly when the electric competent is positioned in the final connected state. The electric connection box further includes a second cover having a locking member; wherein the locking member extends vertically and passes trough an aperture formed in the main body for engaging and locking the electric component.