Trigger Dispenser Snap-Free Interference Connection
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Solution Overview
Problem
Existing manual trigger dispenser devices face challenges in achieving a fast and reliable connection between the dispenser head and the bottle connector, which affects production efficiency and assembly speed, particularly in high-volume manufacturing.
Innovation Solution
The introduction of a snap-free interference connection or irreversible welding methods between the connector and the frame, allowing for a secure and efficient attachment without requiring precise dimensional tolerances, thereby enhancing assembly speed and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If snap connection through peripheral tabs is used, then assembly is simplified, but connection reliability is insufficient
Solution Approach 1:
The connection system is divided into multiple independent elements: peripheral tabs for alignment and snap connection, and central protrusion/inpression for interference fit. This segmentation allows each element to perform its specific function optimally while working together to achieve both ease of assembly and high reliability.
Solution Approach 2:
Multiple connection mechanisms (peripheral tabs and central protrusion-impression) are merged into a single integrated connection system. This combination leverages the alignment advantage of tabs with the reliability advantage of interference fit, resolving the contradiction between ease of operation and connection reliability.
2Reliability
If precise dimensional tolerances are required, then connection reliability improves, but production time increases
Solution Approach 1:
The design changes the dimensional parameters of the connection elements, specifically making the protrusion slightly larger than the impression to create an interference fit. This parameter change enables reliable connection through the interference mechanism itself, eliminating the need for tight tolerances and reducing production time.
Solution Approach 2:
The protrusion-impression interface acts as an intermediary mechanism that mediates between the two components. The interference fit design of this intermediary allows for tolerance compensation while maintaining connection reliability, thus reducing the need for precise dimensional control.
3Productivity
If connection method is simplified, then assembly speed increases, but connection strength decreases
Solution Approach 1:
The peripheral tabs are designed to automatically align and engage with their corresponding features during the assembly process. This preliminary action of alignment eliminates the need for complex positioning operations, maintaining high assembly speed while the subsequent interference fit provides the necessary connection strength.
Solution Approach 2:
The connection system combines two different connection mechanisms (snap connection through tabs and interference fit through protrusion-impression) into a composite connection structure. This composite approach leverages the speed advantage of snap connection with the strength advantage of interference fit, resolving the contradiction between assembly speed and connection strength.
Data Source
AI summary
A pre-assembled dispenser head (10) for a dispenser device (1) of a liquid includes a frame (14), a connector (60) having a suction tube (62) for the liquid. The connector (60) is connected to the frame (14) by a snap-free connection.