Hinged Container Cap With 180-Degree Projection
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Solution Overview
Problem
Existing caps with hinged closing elements face difficulties in being easily opened and closed due to limited angular extent of the tab, and are challenging to extract from molds due to undercuts, which can lead to deformation or breakage during removal.
Innovation Solution
A cap design featuring a closing element with a projection extending around the axis by at least 180°, allowing for easier user operation and extraction from molds by distributing the extracting force over a larger arc, and incorporating stiffening ribs for enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a tab with limited angular extent (roughly 90° or less) is provided on the closing element, then the cap structure remains compact, but the user cannot easily displace the closing element between open and closed positions
Solution Approach 1:
The projection extends around the axis by at least 180° in the angular dimension, transforming the tab from a limited angular extent (roughly 90°) to a substantial angular extent (at least 180°). This dimensional change in the angular parameter provides a larger surface area for user interaction, enabling easier displacement of the closing element between open and closed positions while maintaining structural integrity
2Reliability
If inner undercuts are provided in the cap structure, then engaging means can be formed to keep the retaining ring associated with the neck, but the cap becomes difficult to extract from the mold without deformation or breakage
Solution Approach 1:
The projection is provided with a specific local quality - a thrust surface on its outer surface that is specifically designed to interact with the extracting element. This localized feature allows the extracting element to apply extracting force at a predetermined position on the projection, enabling easy extraction from the mold without deforming the cap or causing breakage, while the rest of the cap structure maintains its undercuts for reliable engagement
3Ease of manufacture
If the projection extends around the axis by a large angle (at least 180°), then the thrust surface area increases for easier extraction, but the radial dimension of the cap increases
Solution Approach 1:
The projection is segmented into different functional zones: a thrust surface on the outer surface for interacting with the extracting element, and a region where the radial dimension is reduced. This segmentation allows the thrust surface to extend around the axis by at least 180° for easy extraction, while the radial dimension is minimized in other areas to maintain compact overall cap dimensions suitable for small necks
Data Source
AI summary
A cap for a container comprises:a retaining ring suitable for being associated with a neck of the container;a closing element comprising a lateral wall which extends around an axis and a transversal wall which extends transversally to the axis for defining a closed end of the closing element;a hinge structure which connects the closing element to the retaining ring, so that the closing element is displaceable between an open position and a closed position.The closing element comprises a projection which projects from an outer surface of the lateral wall transversally to said axis, the projection extending around said axis by an angle of at least 180°.