Double Container Rotation Suppression via Rib Interlock

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Solution Overview

Problem

Conventional cup-shaped double containers with a heat-insulating design face issues where the inner and outer containers can be easily separated due to relative rotation, especially when the opening or bottom surface has a non-circular shape, leading to unintended separation.

Innovation Solution

A cup-shaped double container design featuring a non-circular cross-section for both the inner and outer containers, with ribs on the inner container and rotation regulating units on the outer container, which interfere to prevent relative rotation and separation, ensuring the containers remain attached without welding.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If side-projecting portions are provided to suppress rotation by friction force, then relative rotation is suppressed, but the inner container can still rotate easily when a human hand applies force

Engineering Contradiction:

Improverotation suppressionVSAvoidrotation suppression reliability

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The patent replaces the friction-based mechanical suppression system with a geometric interlocking system. The side-projecting portions on the inner container are designed to fit into corresponding recesses on the outer container, creating a mechanical interlock that prevents rotation without relying on friction. This geometric constraint ensures rotation suppression is reliable and cannot be overcome by applied forces.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Stability of the object's composition

If side-projecting portions are provided at predetermined intervals, then rotation is suppressed within a range, but rotation is still possible between the intervals

Engineering Contradiction:

Improverotation suppressionVSAvoidrotation suppression precision

Core Design Contradiction:

Stability of the object's compositionVSManufacturing precision

Solution Approach 1:

The patent divides the circumferential surface into multiple segments by providing multiple side-projecting portions at predetermined intervals. Each side-projecting portion acts as an independent rotation suppression element, and their collective arrangement provides continuous rotation suppression around the entire circumference. This segmentation approach ensures that rotation is suppressed at all positions, not just at specific points.

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If the opening or bottom surface member has a non-circular shape, then product differentiation and designability are improved, but relative rotation generates separating force causing easy separation

Engineering Contradiction:

ImprovedesignabilityVSAvoidattachment stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The patent employs asymmetric non-circular shapes for both the inner and outer container openings. The inner container has an opening with a specific asymmetric profile, and the outer container has a corresponding asymmetric profile. This asymmetric geometry creates a unique fit that prevents relative rotation and separation, while still allowing for product differentiation and design flexibility. The asymmetric shapes interlock to provide stable attachment.

Inventive Principle:

Principle #4Asymmetry

4Strength

If welding is used to attach containers, then attachment strength is improved, but production process complexity increases

Engineering Contradiction:

Improveattachment strengthVSAvoidproduction process simplicity

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The patent replaces the welding process with a mechanical interlocking system. The side-projecting portions on the inner container are designed to fit into corresponding recesses on the outer container, creating a mechanical attachment that eliminates the need for welding. This mechanical system provides sufficient attachment strength while significantly simplifying the production process, as no welding equipment or welding operations are required.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 design effectively prevents the inner and outer containers from separating easily by regulating relative rotation, enhancing the stability and attachment of the containers, even when the shape is non-circular, thus maintaining the heat-insulating effect.

Implementation Method 1

a rotation regulating unit disposed on an inner peripheral surface of a cylindrical side surface member of the outer container and capable of regulating relative rotation of the inner container and the outer container by interfering with the rib

Methodology Applied

Scientific EffectMechanical interference: Mechanical Force

Implementation Method 2

having a space provided between the inner container and the outer container

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Data Source

PatentUS10549901B2Double container

Publication Date: 2020.02.04 APLIS CORP

AI summary

Provided is a double container in which an inner container and an outer container are difficult to be separated in a case where the inner container is attached to the outer container. It is a cup-shaped double container, having an inner container and an outer container in which a part of a cross section are non-circular, having a space provided between the inner container and the outer container, and having an open upper end portion, the container including: on an outer peripheral surface of a cylindrical side surface member of the inner container, a rib extending in a vertical direction and disposed in plural numbers at predetermined intervals; and a rotation regulating unit disposed on an inner peripheral surface of a cylindrical side surface member of the outer container and capable of regulating relative rotation of the inner container and the outer container by interfering with the rib.