Flexible Guide Wall Linking Part for Electrical Connection Box
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Solution Overview
Problem
Existing electrical connection boxes suffer from deteriorated rattling elimination functions during high oscillation levels, leading to potential wear-out of contact portions between relay terminals and connection box terminals.
Innovation Solution
The electrical connection box features a guide wall formed across the entire circumference of the storage space with a pressing projection at the narrow linking part and press-fit ribs on the guide wall's base end, ensuring the guide wall displaces uniformly and maintains the rattling elimination function, and the pressing force prevents rattling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If guide walls are separated at predetermined intervals to allow elastic deformation, then the connection box can absorb oscillation, but the rattling elimination function deteriorates under high oscillation levels
Solution Approach 1:
The guide wall is segmented into multiple sections along its length, with linking parts connecting adjacent sections. This segmentation allows each section to deform independently under oscillation while maintaining overall structural integrity, resolving the contradiction between needing elastic deformation for oscillation absorption and maintaining rigidity for rattling elimination.
Solution Approach 2:
The guide wall transitions from a static rigid structure to a dynamic flexible structure through the linking parts. The flexibility of the linking parts allows the guide wall to adapt its rigidity based on oscillation intensity - remaining rigid under normal conditions to prevent rattling, and becoming flexible under high oscillation to absorb energy, thus maintaining reliable terminal contact.
2Reliability
If the guide wall is made rigid to prevent deformation, then terminal contact stability is maintained, but the connection box cannot absorb oscillation energy
Solution Approach 1:
The guide wall is divided into multiple rigid sections connected by flexible linking parts. Each section maintains rigidity to ensure stable terminal contact, while the linking parts provide the necessary flexibility for oscillation absorption, resolving the contradiction between rigidity for contact stability and flexibility for energy absorption.
Solution Approach 2:
The linking parts function as flexible elements within the guide wall structure, allowing controlled deformation to absorb oscillation energy while the overall guide wall structure maintains sufficient rigidity to prevent terminal contact instability, thus resolving the contradiction between rigidity and flexibility requirements.
3Reliability
If pressing force is applied uniformly across the relay, then contact stability is improved, but the relay cannot accommodate thermal expansion and contraction
Solution Approach 1:
The pressing mechanism transitions from a static fixed-position structure to a dynamic adjustable structure. The pressing position can move along the guide wall within the storage space, allowing the pressing force to be maintained stably while accommodating relay dimensional changes due to thermal expansion and contraction, thus resolving the contradiction between contact stability and thermal adaptability.
Solution Approach 2:
The pressing mechanism allows changes in the pressing position parameter along the guide wall. This parameter change enables the system to maintain optimal pressing force for contact stability while adapting to thermal expansion and contraction of the relay, resolving the contradiction between stable contact and thermal adaptability.
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 rattling and maintains the rattling elimination function even under high oscillation, ensuring no wear-out of contact portions between the relay and connection box terminals.
Implementation Method 1
a narrow linking part 30B which links both wall surfaces to each other is formed in each wall surface in a direction in which the guide wall 30W stands... the linking part 30B is bent slightly outward
Implementation Method 2
a pressing projection 30K which presses the relay 20 is formed on an inside of the linking part 30B
Data Source
AI summary
An electrical connection box (10), including: a relay (20) which has a locking projection (20K); and a connection box main body (30) which has a pressing projection (30K) that is engaged with the locking projection (20K), and which is formed with a storage space (30P) that stores the relay (20), in which a guide wall (30W) which is provided to stand on a boundary of the storage space is formed across the entire circumference of the boundary of the storage space in the connection box main body, and in which the pressing projection (30K) is formed at a narrow linking part (30B) of the guide wall in a direction in which the guide wall is provided to stand.