Trigger Dispenser Off-Axis Duct Assembly
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Solution Overview
Problem
Existing manually operated liquid dispenser devices face challenges in efficient assembly due to asymmetric or off-axis internal components, which complicates production and assembly processes, while also needing to meet increasing requirements for functionality, reliability, and consistent liquid jet dispensing.
Innovation Solution
The dispenser device incorporates an auxiliary body with a primary and secondary liquid aspiration duct, an air aspiration duct, and a piston mechanism, allowing for easy assembly and ensuring a seal between the container and dispenser head, even with off-axis components, through a coaxial and radially distanced duct design that maintains simplicity and prevents liquid leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If asymmetric or off-axis internal components are used in the dispenser device, then functionality and reliability are improved, but assembly complexity increases
Solution Approach 1:
The dispenser device is divided into separate modular components (container, dispenser head, auxiliary body, piston, valves) that can be manufactured independently and then assembled. The auxiliary body is separated as a distinct component with integrated ducts, allowing it to be pre-assembled and sealed before final integration with the container and dispenser head, simplifying the overall assembly process despite asymmetric internal components.
Solution Approach 2:
The auxiliary body acts as an intermediary component between the container and the dispenser head. It includes integrated aspiration ducts and sealing elements that mediate the connection between these components, providing a standardized interface that simplifies assembly while maintaining the functionality of asymmetric internal components.
2Adaptability or versatility
If off-axis duct design is used, then liquid aspiration functionality is improved, but sealing reliability deteriorates
Solution Approach 1:
The auxiliary body incorporates localized sealing elements (sealing lips, O-rings, or other sealing features) at specific critical locations where the off-axis ducts connect to the container and dispenser head. These localized sealing solutions address the sealing challenges of off-axis ducting without requiring the entire duct system to be symmetric or axis-aligned.
Solution Approach 2:
The patent explicitly accepts and designs for asymmetric duct configurations in the auxiliary body. The ducts are positioned radially distanced from the container axis at asymmetric locations to optimize liquid aspiration from the bottom of the container. Sealing mechanisms are designed to accommodate this asymmetry, using flexible sealing elements or asymmetric sealing geometries that maintain reliable seals despite the off-axis positioning.
3Adaptability or versatility
If complex internal components are integrated, then device functionality is improved, but manufacturing cost increases
Solution Approach 1:
Complex internal components are segmented into separate parts (auxiliary body, piston, valves, ducts) that can be manufactured using different processes optimized for each component. The auxiliary body with its integrated ducts can be molded as a single piece, while separate components like pistons and valves can be manufactured independently and assembled later, reducing overall manufacturing complexity and cost.
Solution Approach 2:
The auxiliary body merges multiple functions into a single component: it provides structural support, contains the aspiration ducts, houses the piston, and incorporates sealing elements. This consolidation reduces the number of separate parts that need to be manufactured and assembled, thereby reducing manufacturing cost while maintaining full functionality.
Data Source
AI summary
A trigger dispenser device (1) envisages a secondary liquid aspiration duct (50) in communication with the dispenser duct, and a primary liquid aspiration duct (8) in communication with the container, off-axis with each other. Between these, a joining compartment (64) is provided communicating upstream with the primary liquid aspiration duct (8) and communicating downstream with the secondary liquid aspiration duct (50) to form the fluidic connection between them. In particular, the container (C) is of the type with built-in suction pipe.