Elastic Interlocking Assembly for Cosmetic Packaging
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Solution Overview
Problem
Existing assembly methods for cosmetic product packaging, such as those using attachment rings and collars, result in a double thickness around the dispensing device, increasing the size of the assembly and complicating industrial production.
Innovation Solution
An open-loop ring that is elastically deformable from an open to a closed position, allowing for a reduced diameter assembly by interlocking with recessed and projecting elements on a tubular part, enabling a more compact and automated assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a closed-loop ring with a collar is used for assembly, then the attachment is secure and permanent, but the assembly size increases due to double thickness
Solution Approach 1:
The ring is segmented into an open-loop configuration with distinct first and second assembly means positioned at different locations. This segmentation allows the ring to engage with the tubular part at multiple points without requiring a complete closed loop, thereby reducing the overall assembly volume while maintaining secure attachment through distributed engagement points.
Solution Approach 2:
The open-loop ring is nested within the tubular part of the external element, with the ring's open configuration allowing it to be inserted and then closed around the tubular part. This nesting arrangement eliminates the need for a separate collar component, reducing the double thickness issue while maintaining the secure attachment function through the elastic interlocking mechanism.
2Volume of moving object
If an open-loop ring is used instead of a closed-loop ring, then the assembly size is reduced, but the manufacturing complexity increases
Solution Approach 1:
The ring's geometric parameters are designed to allow elastic deformation between an open configuration (for insertion) and a closed configuration (for secure attachment). The first and second assembly means are positioned and shaped to engage with complementary elements on the tubular part, enabling automated manipulation. This parameter design allows the ring to be manufactured as a single piece with controlled elasticity, reducing manufacturing complexity despite the open-loop design.
3Reliability
If elastic interlocking with multiple assembly means is used, then the attachment is irreversible and secure, but the device complexity increases
Solution Approach 1:
The single open-loop ring serves multiple functions: it provides structural support, enables secure attachment through elastic interlocking, and reduces assembly size. The first and second assembly means on the ring engage with corresponding elements on the tubular part, creating irreversible attachment without requiring separate collar or fastening components. This multi-functionality within a single component reduces overall device complexity while maintaining secure, permanent attachment.
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
The solution reduces the size of the assembly by eliminating the need for a double thickness around the dispensing device, facilitating easier and more efficient industrial production while ensuring a stable and irreversible interlocking mechanism.
Implementation Method 1
a ring in the form of an open-loop ring, which is elastically deformable between an open position and a closed position
Implementation Method 2
The external element comprising means for assembly with the ring by elastic interlocking
Data Source
AI summary
An assembly device comprises an external element and an open-loop ring. The external element comprises a tubular part extending along an axis. The open-loop ring is elastically deformable between an open position and a closed position. The external element comprises an assembly part assemblable with the ring by elastic interlocking. The assembly part comprises recessed elements and/or projecting elements arranged on an internal wall of the tubular part. The ring comprises first assembly part assemblable with the external element by elastic interlocking when the ring is in the open position, and the second assembly part interlocking with the external element by elastic interlocking when the ring is in the closed position. Such elastic interlocking assembly device allows for the irreversible assembly of the external element with a container neck.