Aerosol Shoulder Cover Positioning via Localized Asymmetry
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Solution Overview
Problem
The challenge lies in attaching a shoulder cover to an aerosol container with two stems, where the container has a circular cross-sectional shape and the mounting cup has a non-circular shape, making proper alignment and positioning difficult due to the mismatch in shapes.
Innovation Solution
The shoulder cover features a configuration with convex and non-convex sections on its inner surface that align with the non-circular upper tier part of the mounting cup, along with an anti-rotation rib and an annular wall that can break off for easy attachment and alignment, ensuring secure locking without increasing the cover's height or production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the shoulder cover has a circular outer shape to match the circular container, then the overall appearance is consistent, but positioning becomes troublesome because the non-circular mounting cup and shoulder cover parts cannot be aligned based on outer shapes
Solution Approach 1:
The shoulder cover incorporates a localized non-circular fitting portion that matches the non-circular mounting cup, while the rest of the cover maintains a circular shape. This allows the cover to align properly with the mounting cup's long and short sides through the fitted portion, while preserving the overall circular appearance when attached to the container.
Solution Approach 2:
The fitting portion of the shoulder cover is designed with asymmetric dimensions (different lengths in different directions) to correspond to the non-circular mounting cup. This asymmetric design enables unique alignment by matching the long sides and short sides of the mounting cup, eliminating positioning ambiguity while the external circular shape remains symmetric for aesthetic purposes.
2Manufacturing precision
If the shoulder cover includes positioning features for the non-circular mounting cup, then positioning accuracy improves, but the device complexity increases
Solution Approach 1:
The positioning function is merged into the shoulder cover's own structure through the fitting portion with non-circular cross-section, rather than requiring separate positioning mechanisms. The fitting portion itself serves both as a structural element of the cover and as the positioning feature, eliminating the need for additional complex positioning devices.
Solution Approach 2:
The fitting portion of the shoulder cover serves multiple functions: it provides structural support as part of the cover, enables precise positioning through its non-circular shape, and facilitates attachment to the mounting cup. This multi-functionality reduces the need for separate components and simplifies the overall structure.
Data Source
AI summary
A shoulder cover for an aerosol container that can be readily positioned and attached to the aerosol container having two stems. The shoulder cover is attached to a mounting cup that includes an upper tier part having two stems protruding from a top wall thereof and having long sides and short sides, and a cylindrical part. The shoulder cover includes an outer circumferential wall, a roof wall, a cylindrical wall extending downward from the roof wall, and locking structure provided to the cylindrical wall and retaining the shoulder cover by engaging with the cylindrical part of the mounting cup, and positioning structure for fitting with the upper tier part to thereby position a mating position of the shoulder cover is formed.