Bottle Bottom Wall Structure for Depressurization Absorption
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Solution Overview
Problem
Conventional bottles exhibit a feeling of incongruity when viewed from the outside, especially when filled with contents, and have limited performance in absorbing depressurization.
Innovation Solution
The bottle features a rising peripheral wall portion with vertically depressed ribs that allow the movable wall portion to revolve, increasing the volume and improving depressurization absorption by facilitating the movement of the wall portions during filling and pressure changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional bottle structure with a movable wall portion is used, then the bottle can absorb depressurization, but a part with a different appearance partially occurs at the lower end portion when the bottle is filled with contents
Solution Approach 1:
The rising peripheral wall portion is divided into multiple vertical rib sections that can independently deform. This segmentation allows the wall to absorb depressurization through localized rib deformation rather than requiring a separate movable wall portion, thereby maintaining appearance uniformity while achieving depressurization absorption.
Solution Approach 2:
The solution transitions from a radial movable wall mechanism to a vertical rib deformation mechanism. The vertical ribs deform in the vertical dimension to absorb pressure changes, eliminating the need for radial wall movement that causes appearance inconsistencies at the lower end portion.
2Strength
If the upper end portion of the rising peripheral wall portion is constrained, then the structural integrity is maintained, but the capacity to absorb depressurization is reduced
Solution Approach 1:
The upper end portion of the rising peripheral wall portion is designed with dynamic characteristics, allowing it to move freely in the bottle radial direction. This dynamic design enables the vertical ribs to deform effectively during pressure changes, absorbing depressurization while maintaining structural integrity through the interconnected rib structure.
Solution Approach 2:
The flexibility parameter of the upper end portion is increased by removing constraints, allowing greater radial movement. This parameter change enables the structure to accommodate pressure variations through vertical rib deformation, thereby enhancing depressurization absorption capacity while maintaining overall structural strength.
Data Source
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AI summary
The present invention relates to a bottle (1, 101) which is formed of a synthetic resin material into a cylindrical shape with a bottom. A bottom wall portion (19, 119) of a bottom of the bottle includes: a ground contact portion (18, 118) which is positioned at an outer circumferential edge portion; a rising peripheral wall portion (21, 121) which is connected to the ground contact portion from an inner side of the bottle radial direction and extends upward; a ring-shaped movable wall portion (22, 122) which protrudes from an upper end portion of the rising peripheral wall portion to the inside of the bottle radial direction; and a depressed peripheral wall portion (23, 123) which extends upward from an inner end portion of the movable wall portion in the bottle radial direction. The movable wall portion (22, 122) is rotatably disposed about a connecting part with the rising peripheral wall portion (21, 121) so as to move the depressed peripheral wall portion (23, 123) upward, and a concave and convex portion (30, 130) is formed over an entire circumference of the rising peripheral wall portion (21, 121).