Double Container Vertical Ribs Air Passage
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Solution Overview
Problem
Conventional synthetic resin-made double containers with a double structure face challenges in securing an air passage from the outside air introduction port to the barrel and containing portions, leading to potential issues with volume-reduction deformation and air introduction after content liquid discharge.
Innovation Solution
The double container design incorporates a cylindrical outer layer body and an inner layer body with a cylindrical inner mouth portion, featuring a plurality of vertical ribs on the outer surface of the inner layer body that extend over the inner mouth portion to the containing portion, ensuring reliable air passage from the outside air introduction ports to the barrel and containing portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the outside air introduction port is formed in the outer mouth portion, then air can be introduced between the inner layer body and outer layer body, but an air passage from the outside air introduction port to between the shoulder portion and the containing portion cannot be secured appropriately
Solution Approach 1:
The inner layer body is segmented into multiple regions by providing a plurality of vertical ribs that extend from the inner mouth portion to the containing portion. These ribs divide the space between the inner and outer layer bodies into multiple channels, ensuring that air can reliably pass from the outside air introduction port through the shoulder portion region to between the barrel portion and containing portion, solving the air passage securing problem without requiring complex additional structures.
Solution Approach 2:
The vertical ribs are strategically positioned at specific locations on the inner layer body to create localized air passage channels. By concentrating the air passage function at specific rib positions rather than relying on uniform spacing throughout, the design secures reliable air flow paths while maintaining simple overall structure.
2Reliability
If the containing portion is volume-reduction deformed after content liquid discharge, then contact with outside air is reduced and degradation is suppressed, but the outer layer body cannot be restored to original shape without proper air introduction
Solution Approach 1:
The vertical ribs are pre-configured on the inner layer body to create air passage channels before use. When the outer layer body is squeezed to discharge content liquid, these pre-formed channels allow outside air to be automatically introduced between the inner and outer layer bodies, enabling the outer layer body to restore to its original shape while the containing portion remains volume-reduction deformed. This preliminary structural arrangement ensures both protection and ease of restoration without requiring additional operational steps.
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 effectively secures an air passage, allowing the outer layer body to return to its original shape while the inner layer body undergoes volume-reduction deformation, reducing contact with outside air and minimizing liquid degradation.
Implementation Method 1
a plurality of vertical ribs arranged with spacing in a circumferential direction on an outer surface of the inner layer body, and each extending over the inner mouth portion to the containing portion, wherein at least one of the plurality of vertical ribs faces the outside air introduction port
Implementation Method 2
the outer layer body alone can be restored to the original shape while the containing portion of the inner layer body remains volume-reduction deformed
Data Source
Figure 1
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Figure 4
AI summary
A double container (1) comprises: an outer layer body (10) including an outer mouth portion (11) and a barrel portion (13); an inner layer body (20) including an inner mouth portion (21) and a containing portion (22); an outside air introduction port (14) for introducing outside air; and a plurality of vertical ribs (30) arranged with spacing in a circumferential direction on an inner surface of the outer layer body (10) or an outer surface of the inner layer body (20), and each extending over the outer mouth portion (11) to the shoulder portion (12) or extending over the inner mouth portion (21) to the containing portion (22), wherein at least one of the plurality of vertical ribs (30) faces the outside air introduction port (14).