Substrate Holding Structure with Plastically Deformed Protrusions
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Solution Overview
Problem
Conventional substrate holding structures fail to effectively reduce rattling of substrates within electronic component modules and electrical connection boxes, as existing methods do not adequately secure the substrates against vibrations and movements.
Innovation Solution
A substrate holding structure that includes a casing with protrusions on its side walls that are plastically deformed upon contact with the substrate, providing a secure fit and preventing relative displacement between the substrate and the casing, thereby reducing rattling. This structure features engagement holes and holding units that connect the substrate to the casing, ensuring it is securely accommodated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional side edge sandwiching method is used, then substrate can be fixed in case, but rattling occurs in parts not covered by the sandwiching structure
Solution Approach 1:
The invention transitions from one-dimensional edge sandwiching to three-dimensional multi-point contact by adding protrusions on both side surfaces and bottom surface of the case, creating comprehensive spatial constraints that eliminate rattling in all directions
Solution Approach 2:
The fixation function is divided into multiple independent protrusion elements distributed at different locations (side surfaces and bottom surface), where each protrusion provides localized constraint, collectively achieving complete substrate stabilization
2Reliability
If protrusions are provided on both opposed side wall surfaces, then substrate rattling is reduced, but device complexity increases
Solution Approach 1:
Multiple protrusions on each side wall surface are merged into a single integrated casing structure, and the protrusions on both side walls work together as a unified fixation system, reducing the need for separate components while achieving comprehensive substrate constraint
3Reliability
If protrusions are disposed in deep part on side wall surfaces, then substrate holding effectiveness is improved, but manufacturing precision requirements increase
Solution Approach 1:
The protrusions are pre-positioned in deep parts of the side wall surfaces during casing manufacturing, establishing predetermined contact points with the substrate before assembly, which guides the substrate into correct position and enhances holding effectiveness while maintaining manageable manufacturing tolerances
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
The described solution effectively suppresses rattling of the substrate within the casing, protecting electronic components from vibrations and ensuring stable operation by using plastically deformed protrusions to securely hold the substrate in place, thus enhancing the reliability of the electronic component module and electrical connection box.
Implementation Method 1
protrusions that protrude from side wall surfaces that are wall surfaces of the casing along an insertion direction of the substrate and opposed to side surfaces of the substrate, and that are plastically deformed due to contact with the substrate to be inserted into the accommodating unit
Data Source
AI summary
A substrate holding structure includes holding units and protrusions. The holding units are provided to a casing that includes an accommodating unit accommodating therein an inserted substrate, and hold an end part of the substrate accommodated in the accommodating unit on the insertion direction-entrance side of the substrate. The protrusions protrude from side wall surfaces that are wall surfaces of the casing along the insertion direction of the substrate, the wall surfaces being opposed to the side surfaces of the substrate, and are plastically deformed due to contact with the substrate to be inserted into the accommodating unit.