Mounting Structure With Elastic Plate Locks for Breakage-Free Detachment
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Solution Overview
Problem
Existing mounting structures with split claw portions for attaching and detaching inside handles on vehicle lock releasing levers face difficulties in easy detachment and are prone to breakage due to stress concentration at the root of the claw portions, leading to low flexibility and potential breakage.
Innovation Solution
A mounting structure featuring a shaft with a head portion and locking portion, combined with flat plate-shaped extension portions on the mounted member, allowing for easy attachment and detachment by elastic deformation and external force application, dispersing stress along the root of the flat plate-shaped extension portions to prevent breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If arc-shaped claw portions are used for engagement, then the mounting member can be securely attached to the mounted member, but the claw portions are prone to breakage due to stress concentration at the root when detached
Solution Approach 1:
The claw portion is divided into multiple segments (first claw portion and second claw portion) that can independently deform and return to their original positions. This segmentation allows each segment to handle stress separately, preventing stress concentration at a single root location and reducing breakage risk while maintaining secure engagement.
Solution Approach 2:
The claw portion is designed with dynamic flexibility, allowing it to elastically deform during engagement and detachment operations. The claw portion can bend outward when engaging with the step portion and return to its original position when detached, enabling repeated attachment/detachment cycles without permanent deformation or breakage.
2Strength
If columnar claw portions are used for engagement, then the mounting member can be securely attached, but the claw portions are difficult to detach even after multiple attachment/detachment operations
Solution Approach 1:
The claw portion transitions from a rigid columnar shape to a flexible configuration that can dynamically adapt during operation. The claw portion can elastically deform outward to engage with the step portion and can be easily pushed back to detach, maintaining strong engagement during normal operation while enabling easy detachment when needed.
Solution Approach 2:
The physical state of the claw portion changes during operation - it transitions from a relaxed state to a deformed engaged state and back again. This parameter change in flexibility and deformation capability allows the claw portion to provide strong engagement force when attached while remaining easily detachable through simple pushing motion.
3Reliability
If flat plate-shaped extension portions with linear roots are used, then stress is dispersed and breakage is prevented, but the structure becomes more complex compared to simple arc-shaped claws
Solution Approach 1:
The extension portion is segmented into a flat plate shape with a distinct linear root region separated from the engagement portion. This segmentation creates a clear stress distribution path where the linear root acts as a stress-dispersing foundation, preventing stress concentration while maintaining relatively simple overall structure.
Solution Approach 2:
Different regions of the extension portion have different local properties - the root portion has a linear configuration optimized for stress dispersion and structural support, while the engagement portion has a flat plate shape optimized for elastic deformation and engagement. This local quality differentiation achieves both stress dispersion and simple structure.
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
Enables easy and repeated attachment and detachment of mounting members without breakage, reducing the risk of stress concentration and damage to the mounting components.
Implementation Method 1
the flat plate-shaped extension portions elastically deform and the head portion is accommodated between the flat plate-shaped extension portions
Data Source
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AI summary
A mounting structure includes: a mounting member including a fitting portion and a mounting member-main body; and a mounted member including a mounted member-main body, and a fitted portion. The fitting portion includes a shaft portion protruding and extending from the mounting member-main body, a head portion provided on a side of a leading-end of the shaft portion, and a locking portion provided between the shaft portion and the head portion. The fitted portion includes three or more flat plate-shaped extension portions protruding and extending from the mounted member-main body, and locked portions on sides of leading-ends of the plate-shaped extension portions. The flat plate-shaped extension portions are respectively disposed at positions where the flat plate-shaped extension portions surround and form an inner space in which the head portion is accommodated. The mounting member is fitted into the mounted member by engagement between the locking portion and the locked portion by inserting the head portion between the flat plate-shaped extension portions to cause the flat plate-shaped extension portions to elastically deform and the head portion to be accommodated between the flat plate-shaped extension portions. Fitting between the mounting member and the mounted member is released by releasing the engagement between the locking portion and the locked portion by application of an external force so as to separate the mounting member from the mounted member. Use of the mounting structure makes it possible to easily attach/detach the mounting member, which is mounted on the mounted member, without breakage even when attaching/detaching the mounting member.