Electronic Component Housing Unit Grounding Terminal Torque Absorption
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Solution Overview
Problem
Electronic component housing units in vehicles are prone to deformation due to excessive screw tightening torque, which can lead to erratic device operation and structural instability.
Innovation Solution
An electronic component housing unit design that incorporates a grounding terminal with a fitting portion connected to the case, which absorbs rotation torque and reduces stress on the housing unit, preventing deformation and increasing rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the resin fitting portion is integrally formed with a cover that engages the case to prevent rotation during screw tightening, then the housing unit can be securely mounted, but excessive driving force causes deformation of the resin fitting portion
Solution Approach 1:
The invention divides the previously integral resin fitting portion and cover into separate components. The fitting portion is now a distinct element that can be independently designed and attached, allowing it to be replaced or reinforced without redesigning the entire housing structure. This segmentation enables the use of more robust materials or designs for the fitting portion specifically.
Solution Approach 2:
The invention introduces a metal reinforcement element as an intermediary between the resin fitting portion and the case. This metal component acts as a mediator that absorbs and distributes the mechanical stress from screw tightening, preventing the resin portion from deforming while still allowing secure mounting.
2Ease of manufacture
If the resin fitting portion is used both for temporary fixing and for preventing rotation during screw tightening, then mounting can be completed, but the cumulative stress causes deformation of the weak resin portion
Solution Approach 1:
The invention separates the temporary fixing function and the rotation prevention function into different components. The resin fitting portion handles temporary fixing, while a separate metal reinforcement element handles rotation prevention during screw tightening. This functional segmentation allows each component to be optimized for its specific purpose without compromising structural integrity.
Solution Approach 2:
The invention applies partial action by using the resin fitting portion only for its appropriate function (temporary fixing) rather than overloading it with rotation prevention. The metal reinforcement element provides the additional support needed for rotation prevention without requiring the resin portion to exceed its structural capabilities.
3Ease of manufacture
If the fitting portion is connected to the case through the cover, then the housing unit can be assembled, but the load-bearing surface area is increased unnecessarily
Solution Approach 1:
The invention extracts the rotation prevention function from the cover structure and places it in a separate metal reinforcement element attached to the fitting portion. This allows the cover to be simplified and the load-bearing surface area to be reduced, as the reinforcement element provides the necessary structural support without requiring additional cover complexity.
Data Source
AI summary
To perform the temporary mounting of an electronic component housing unit, a clamp is inserted into a clamp hole formed in the load bearing face of a vehicle body. Then, a screw through hole in a grounding terminal is aligned with a screw hole formed in the load bearing face, and a screw is inserted therein and tightened to secure the earth portion of the grounding terminal to the load bearing face. At this time, rotational torque generated by tightening the screw is absorbed by the clamp that is directly fixed to the grounding terminal. Since the clamp is fixed directly to the grounding terminal, turning of the electronic component housing unit bearing the grounding terminal can be prevented, without stress being transmitted to a case and to other constituents.