Bayonet Trigger Dispenser Closure Wear Reduction
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Solution Overview
Problem
Bayonet closing systems in trigger dispensers suffer from wear issues that interfere with the coupling and separation of the container and closing body, leading to structural problems and potential safety concerns.
Innovation Solution
A bayonet closing system with axially and circumferentially varying stopping projections and a snap-fit mechanism, where the weakest portions are designed to deform without interference, allowing for reliable coupling and easy separation, and automatic correction of angular misalignment during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a bayonet closing system is used for coupling the container and closing body, then the ease of manufacture and adaptability are improved, but wear of the coupling parts occurs leading to structural problems
Solution Approach 1:
The closing system is divided into distinct functional elements: a closing body with circumferential stopping projections, a container with axial stopping projections, and a pump body. This segmentation allows each component to have optimized features for its specific function while maintaining overall system reliability and ease of manufacture.
Solution Approach 2:
Different regions of the closing system have different properties: the circumferential stopping projections provide rotational stopping, the axial stopping projections provide axial positioning, and the snap-fit mechanism provides secure coupling. Each local region is designed with specific qualities appropriate to its function, resolving the contradiction between ease of manufacture and reliability.
2Device complexity
If traditional bayonet coupling parts structurally interfere with each other during coupling and separation, then the closing system is simple, but wear and structural problems occur
Solution Approach 1:
The closing body and container feature asymmetric stopping projections positioned at specific locations and orientations. The circumferential projections on the closing body interact with axial projections on the container in a non-symmetric arrangement that prevents structural interference during coupling and separation operations, maintaining simplicity while improving reliability.
Solution Approach 2:
The design incorporates preliminary positioning features that guide the coupling process. The stopping projections are arranged to automatically align and position the components correctly during assembly, preventing misalignment and structural interference before the final coupled position is reached.
3Reliability
If the closing system requires precise alignment during assembly, then the reliability is improved, but the ease of operation deteriorates
Solution Approach 1:
The coupling system operates in multiple dimensions: circumferential rotation for engagement, axial movement for positioning, and radial snap-fit action for securing. By distributing alignment functions across different dimensional movements, the system achieves reliable positioning without requiring precise alignment in a single dimension, thereby improving ease of operation.
Solution Approach 2:
The stopping projections and snap-fit mechanism are designed to automatically self-align and self-position the closing body and container during coupling. The geometry of the projections guides the components into correct alignment without requiring external intervention or precise manual positioning, maintaining reliability while simplifying operation.
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 provides a high-reliability bayonet closure that minimizes wear, facilitates easy container replacement, and ensures safe and soft assembly, preventing accidental separation and misalignment issues.
Implementation Method 1
the tongue (44) is free from interferences with further obstacles to rotation... the tongue... snap-wise with the first axial stopping projection (14), thus arranging in the seating portion (30)
Data Source
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AI summary
A closing system for a container comprises a neck (4) and a closing body (40), for example a trigger dispensing head. The neck comprises an annular neck wall (10). The neck wall comprises two axial stopping projection (14,16), two circumferential stopping projection (20,28) and a a seating portion (30). The closing body (40) comprises at least one flexible tongue (44), axially interfering snap-wise with the axial stopping projection. Moreover, the closing body comprises at least one protrusion (50), more rigid than the tongue and axially spaced from the tongue, that, when the tongue is seated in the seating portion, arranges circumferentially sided to the first circumferential stopping projection.