Double-Walled Container Elastic Deformation Fitting
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Solution Overview
Problem
Existing double-walled containers have complex structures or require specialized shapes for the outer container, making it difficult to easily detach and replace the inner container without compromising the outer container's shape or functionality.
Innovation Solution
A double-walled container design featuring a rigid outer container with a circular inner perimeter and an inner container with a non-circular outer perimeter, allowing for elastic deformation of the inner container to fit snugly within the outer container, and vice versa, enabling easy attachment and detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the inner container includes a rotating pressing portion and the outer container includes a locked portion and a protruding portion, then the inner container can be easily pulled out from the outer container, but the structure becomes complicated
Solution Approach 1:
The invention extracts the complex locking mechanism from the inner container and relocates it to the outer container. The outer container includes a locked portion and a protruding portion that engage with the inner container, allowing easy removal without requiring complex structures in the inner container itself.
Solution Approach 2:
Instead of making the inner container complex with rotating pressing portions and locked portions, the invention inverts the approach by making the outer container the active element with the locking mechanism, simplifying the inner container structure while achieving the same functional result.
2Ease of manufacture
If the outer container is made of an elastically deformable material and the inner container is made of a hard material with high rigidity, then the inner container can be fitted into the outer container, but the outer container requires a tapered shape and a fitting mechanism at the opening edge flange
Solution Approach 1:
The invention uses asymmetric cross-sectional shapes where the inner container has a non-circular cross-section that fits into the corresponding outer container shape. This asymmetry provides natural alignment and fitting without requiring tapered shapes or additional fitting mechanisms at the opening edge flange.
Solution Approach 2:
The invention changes the geometric parameters of the container cross-sections from circular to non-circular shapes. This parameter change enables the inner container to fit into the outer container through shape complementarity rather than relying on elastic deformation of a tapered structure.
3Reliability
If the inner container is pushed downward from the top and fits into the inner perimeter surface of the outer container by gradually expanding the diameter, then the inner container can be firmly fitted, but the inner container may pop out if left unattended necessitating a fitting mechanism
Solution Approach 1:
The non-circular cross-sectional shapes create an asymmetric fit between the inner and outer containers. This asymmetric geometry provides inherent stability that prevents the inner container from popping out, eliminating the need for additional fitting mechanisms while maintaining firm attachment.
Solution Approach 2:
The shape-complementary design allows the containers to self-align and self-lock through their geometric forms. The asymmetric cross-sections naturally prevent disengagement without requiring external fitting mechanisms, making the system self-sufficient for maintaining the fitted state.
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 allows for a simple configuration that enables easy attachment and detachment of the inner and outer containers, facilitating the reuse of the outer container by allowing for the replacement of the inner container when it is empty.
Implementation Method 1
an inner container that is a bottomed, cylindrical container, and whose cylindrical body has a horizontal cross-sectional shape with an outer perimeter surface thereof being a non-circular shape, a radius of a circle circumscribed around the non-circular shape being greater than a radius of the inner perimeter surface of the outer container, and the inner container being elastically deformed so as to have portions thereof snugly fit in the inner perimeter surface of the outer container
Data Source
AI summary
A double-walled container comprises an outer container that is a bottomed, cylindrical container made of a material with high rigidity, and whose cylindrical body has a horizontal cross-sectional shape with an inner perimeter surface thereof being circular; and an inner container that is a bottomed, cylindrical container, and whose cylindrical body has a horizontal cross-sectional shape with an outer perimeter surface thereof being a non-circular shape, a radius of a circle circumscribed around the non-circular shape being greater than a radius of the inner perimeter surface of the outer container, and the inner container being elastically deformed so as to have portions thereof snugly fit in the inner perimeter surface of the outer container when placed inside the outer container such that respective cylindrical axes are parallel to each other.