Bottle With Offset Circumferential Grooves To Prevent Buckling
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Solution Overview
Problem
Conventional bottles with circumferential grooves face a reduction in buckling strength due to the formation of these grooves.
Innovation Solution
A bottle design featuring circumferential grooves that extend continuously around the body portion, with adjacent grooves having offset phases and tip positions, forming wave patterns to increase radial rigidity and prevent compression deformation, and incorporating a movable wall portion to absorb internal pressure variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If circumferential grooves are formed to increase radial rigidity, then rigidity in the bottle radial direction is improved, but buckling strength decreases
Solution Approach 1:
The patent applies asymmetry by offsetting the phases of adjacent circumferential grooves in the vertical direction. Instead of having grooves at the same phase (which would create uniform weak points), the grooves are positioned at different phases, distributing stress more evenly around the circumference and preventing localized buckling while maintaining radial rigidity.
Solution Approach 2:
The patent implements preliminary action by pre-forming the circumferential grooves with offset phases during the molding process. This preliminary structural arrangement is built into the bottle before it undergoes compression or buckling, so that the stress-distributing geometry is already in place to prevent buckling strength reduction.
2Strength
If circumferential grooves are formed to increase radial rigidity, then rigidity in the bottle radial direction is improved, but compression deformation increases
Solution Approach 1:
The offset phase arrangement of adjacent grooves creates an asymmetric distribution that prevents uniform compression deformation. When compression force is applied, the asymmetric groove positioning ensures that stress is distributed across different circumferential locations, preventing localized deformation and maintaining overall structural stability.
3Strength
If grooves are positioned to maximize radial rigidity, then rigidity is improved, but stress concentration occurs
Solution Approach 1:
By offsetting adjacent grooves in phase, the patent eliminates the creation of multiple stress concentration points that would occur with in-phase grooves. The asymmetric arrangement ensures that when compression forces apply, stress is distributed across the structure rather than concentrating at aligned groove positions, thereby reducing harmful stress concentration effects.
Data Source
AI summary
The present invention is a bottle that is formed from a synthetic resin material in a cylindrical shape having a bottom at one end, including: a plurality of circumferential grooves that extend continuously around the entire circumference of a body portion and are formed at a distance from each other in a vertical direction. The circumferential grooves extend cyclically in a circumferential direction while undulating in the vertical direction when viewed from the side of the body portion as to form wave patterns, and the respective phases of circumferential grooves that are mutually adjacent to each other in the vertical direction are offset from each other.