Adjustable Trigger-Lever Dispenser for Variable Viscosity Materials
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Solution Overview
Problem
Conventional dispensers require multiple types to handle materials with different viscosities, leading to high costs and material waste due to differing mechanical advantages for trigger levers.
Innovation Solution
A dispenser with an adjustable mechanism that varies the mechanical advantage of the trigger lever by changing the lever distance, maintaining the actuation member's position relative to the driving rod, allowing adaptation to a wide range of materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple types of dispensers are provided for different materials with different viscosity, then the suitability for various materials is improved, but the cost and material expenditure increase
Solution Approach 1:
The dispenser is designed with a trigger lever that can serve multiple functions by adjusting its mechanical advantage. The trigger lever can be configured with different lever distances to handle materials of different viscosities, making a single dispenser suitable for various applications instead of requiring multiple specialized dispensers.
Solution Approach 2:
The trigger lever's mechanical advantage is made adjustable through varying the lever distance between the rotation axis and the actuation member. This dynamic adjustment allows the dispenser to adapt to different material viscosities by changing the force multiplication ratio, enabling one dispenser to replace multiple fixed-configuration dispensers.
2Adaptability or versatility
If the lever distance of the trigger lever is changed to adapt to different viscosities, then the adaptability to various materials is improved, but the device complexity increases
Solution Approach 1:
The pivot member is movably connected to the trigger lever, allowing the lever distance to be adjusted while maintaining a compact integrated structure. The adjustment mechanism is nested within the existing trigger lever assembly, avoiding the need for separate complex adjustment devices and minimizing overall structural complexity.
3Force
If the position of the actuation member relative to the driving rod changes with lever distance adjustment, then the mechanical advantage is adjusted, but the reliability of force transmission decreases
Solution Approach 1:
The actuation member serves as an intermediary between the trigger lever and the driving rod. By maintaining a fixed position of the actuation member relative to the driving rod while adjusting the lever distance, the force transmission path remains stable and reliable, ensuring consistent actuation of the driving rod regardless of the trigger lever's mechanical advantage setting.
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 reliable dispensing of materials with varying viscosities using a single dispenser, reducing the need for multiple types and minimizing material waste.
Implementation Method 1
The force that is exerted on the driving rod when pushing the trigger lever and thus the force with which the material is urged out of the container depends on the construction of the trigger lever, in particular on its mechanical advantage
Data Source
AI summary
A dispenser for dispensing materials includes a dispenser body, a driving rod movable relative to the dispenser body and into the receptacle, a trigger lever having an actuation member for displacing the driving rod upon rotation of the trigger lever around a rotation axis, and a pivot member that rotatably connects the trigger lever to the dispenser body and defines the rotation axis. The pivot member is movably connected to the trigger lever such that a lever distance between the rotation axis and the actuation member changes upon movement of the pivot member relative to the trigger lever. The dispenser includes an adjustment mechanism for adjusting a mechanical advantage of the trigger lever by changing the lever distance and to adjustably fix the lever distance to at least a minimum distance and a maximum distance.