Electric Junction Box Mounting With Orthogonal Pressing Projection
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Solution Overview
Problem
Existing electric junction boxes face challenges in easily mounting electric components with reduced costs while ensuring reliable retention and improved vibration resistance, as they often require high insertion forces and have complex, costly structures due to elastically deformable arm portions that compromise locking and pressing forces.
Innovation Solution
The electric junction box features a mounting portion with a holding wall that includes a locking hole and a pressing projection positioned orthogonally to the movement path, allowing for easy component insertion with reduced force and stable retention, along with holding projections on the front side to enhance stability and vibration resistance, simplifying the structure and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If elastically deformable arm portions are used for locking and pressing projections, then the structure can accommodate component variations, but the insertion force becomes excessively high and the structure becomes complex and costly
Solution Approach 1:
The patent changes the physical state of the locking and pressing projections from elastically deformable to rigid, eliminating the need for high insertion forces while maintaining adaptability through precise geometric design of the mounting portion
Solution Approach 2:
The patent separates the locking function and pressing function into distinct structural elements (locking hole/locking projection and pressing projection respectively), allowing each to be optimized independently without requiring elastic deformation
2Adaptability or versatility
If elastically deformable arm portions are used for locking and pressing projections, then the structure can accommodate component variations, but the structure becomes complex and costly
Solution Approach 1:
The patent changes the physical state of the locking and pressing projections from elastically deformable to rigid, eliminating the need for high insertion forces while maintaining adaptability through precise geometric design of the mounting portion
Solution Approach 2:
The patent extracts the elastic deformation function from the locking and pressing projections, removing the complex arm portion structure and replacing it with simple rigid geometric features that achieve the same functional goals
3Device complexity
If the pressing projection is positioned on the movement path of the locking projection, then the structure is simplified, but the locking reliability deteriorates due to interference
Solution Approach 1:
The patent positions the pressing projection in a location that is spatially separated from the locking projection's movement path, using three-dimensional space arrangement to eliminate interference while maintaining structural simplicity
Solution Approach 2:
The patent provides different functional qualities at different locations: the locking hole is positioned to receive the locking projection for secure engagement, while the pressing projection is positioned at a deviated location to apply pressing force without interfering with the locking action
Data Source
AI summary
An electric junction box includes a mounting portion into which an electric component is fitted and mounted. The mounting portion includes a holding wall, a locking hole and a pressing projection. The holding wall surrounds a peripheral surface of the electric component. The locking hole is formed in the holding wall and is locked to a locking projection provided on the peripheral surface of the electric component. The pressing projection protrudes from the holding wall to press and hold the peripheral surface of the electric component. The pressing projection is disposed at a position deviated from a movement path of the locking projection of the electric component to be fitted into the mounting portion.