Liquid Container Closure Cap Snap Connection for Hygienic Pre-Assembly
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Solution Overview
Problem
Existing closure caps for liquid containers face challenges in temporarily fixing functional inserts during production and assembly, particularly for medicine bottles, while avoiding adhesive connections that can contaminate contents and ensuring reliable sealing without compromising hygiene.
Innovation Solution
A snap connection using a bulge projection on the closure cap and a resilient latching web on the functional insert, combined with an additional internal thread for securing a sealing washer, allows pre-assembly and secure attachment of the functional insert and sealing washer, ensuring easy detachment upon initial use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive connections are used to fix the sealing washer and functional insert, then reliable fixation is achieved, but contamination of contents and hygiene issues occur
Solution Approach 1:
The patent replaces adhesive connections with a mechanical snap connection system. The sealing washer and functional insert are fixed using a snap connection between an inwardly projecting bulge projection on the closure cap and a latching web on the functional insert, eliminating the need for adhesives and thus preventing contamination of contents.
Solution Approach 2:
The closure cap is divided into separable components: the closure cap body, the sealing washer, and the functional insert. These components can be separately manufactured and then assembled through snap connections, allowing for hygienic production and assembly while maintaining reliable fixation.
2Stability of the object's composition
If the functional insert is permanently fixed in the closure cap, then assembly stability is improved, but ease of detachment for initial use is worsened
Solution Approach 1:
The snap connection system provides dynamic fixation: during normal use, the latching web engages behind the bulge projection to provide stable fixation. During initial unscrewing, the force causes the latching web to disengage from the bulge projection, allowing easy detachment. This dynamic behavior satisfies both stability and ease of detachment requirements.
3Ease of manufacture
If multiple separate parts are used for the closure cap, then manufacturing flexibility and pre-assembly capability are improved, but device complexity increases
Solution Approach 1:
The snap connection system acts as an intermediary mechanism that enables simple assembly of multiple parts. The latching web and bulge projection provide an automatic joining mechanism that requires no additional tools or complex assembly procedures, maintaining ease of manufacture despite using multiple separate components.
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
Enables pre-assembly of closure caps with functional inserts and sealing washers, maintaining hygiene and preventing contamination, while facilitating automated assembly and reliable sealing during initial use.
Implementation Method 1
a latching web which is arranged on the functional insert, is resilient in the radial direction, extends at least in sections around the base section and engages behind the bulge projection in the intermediate assembly position
Data Source
AI summary
A closure cap for liquid containers, in particular for medicine bottles, includes a cover section, a screw collar arranged thereon with an internal thread for screwing onto an external thread of the liquid container, a functional insert, in particular a dropper or dosing insert, which can be detachably fixed in the closure cap by means of a base section for assembly purposes, and a snap connection between the closure cap and the functional insert, which snap connection is formed by an inwardly projecting bulge projection which runs at least in sections around the inner wall of the closure cap and a latching web which is arranged on the functional insert, is resilient in the radial direction, runs at least in sections around the base section and engages behind the bulge projection in an intermediate assembly position.