Non-circular Cosmetic Jar Neck with Nested Lid Assembly
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Solution Overview
Problem
Existing solutions for non-cylindrical cosmetic product pots are complex and require changes in the usual closure and opening gestures, making them difficult to use intuitively.
Innovation Solution
A jar design with a non-circular collar featuring a bead edge, incorporating first and second assembly elements on the collar and lid respectively, allowing for easy opening and closing while maintaining a simple rotation-based gesture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a non-cylindrical neck is used in the cosmetic pot, then the aesthetic appearance and product differentiation are improved, but the closing and opening mechanism becomes complex and difficult to operate
Solution Approach 1:
The closure mechanism is segmented into discrete assembly elements: protrusion elements on the neck and recess elements on the lid. These segmented elements can engage with each other to provide locking functionality while maintaining the non-cylindrical shape, thereby simplifying the operation of closing and opening the pot.
Solution Approach 2:
The assembly elements are designed to automatically engage and disengage through simple relative movement between the lid and base. The protrusion and recess elements create self-locking and self-releasing mechanisms that do not require complex operations, allowing the user to easily close and open the pot while maintaining aesthetic shape.
2Ease of operation
If a hinge system or complex mechanism is added to enable closing and opening of non-cylindrical pots, then the functionality is improved, but the device complexity increases
Solution Approach 1:
The closure mechanism merges the aesthetic non-cylindrical shape with the functional closing capability into a unified design. The protrusion and recess assembly elements are integrated directly into the neck and lid structures, eliminating the need for separate hinge systems or complex mechanisms. This combining approach reduces device complexity while maintaining both aesthetic appearance and operational functionality.
3Ease of operation
If the lid is allowed to rotate freely on the non-cylindrical neck, then the ease of opening is improved, but the sealing reliability deteriorates due to excessive rotation or misalignment
Solution Approach 1:
The protrusion and recess assembly elements provide mechanical feedback through engagement and disengagement. When the lid rotates to the correct position, the assembly elements engage to indicate proper alignment and prevent excessive rotation. This feedback mechanism ensures reliable sealing while allowing easy opening through deliberate rotation in the opposite direction.
Solution Approach 2:
The non-cylindrical neck with its asymmetric shape and strategically positioned protrusion elements creates a corresponding asymmetric engagement pattern with the recess elements on the lid. This asymmetric design allows the lid to rotate freely in the opening direction while providing natural stopping points and alignment cues that prevent misalignment during closing, thereby maintaining sealing reliability.
Data Source
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AI summary
Disclosed is a jar for cosmetic product, comprising a base (2) surmounted by a neck (201) and a lid (3), the neck (201) having a non-circular cross-section and comprising a rim (204). The neck comprises at least one first assembly element (205), the lid (3) comprising at least one second assembly element. The lid (3) is configured so that: - when it is in a closed position: - the at least one second assembly element is arranged under the rim (204); and - the at least one second assembly element and the at least one first assembly element (205) are nested together, and - when it is in an open position, the at least one second assembly element (205) is disengaged from the at least one first assembly element and the rim (204). The lid (3) is configured to pass from one position to the other by rotation about the neck (201).