Retractable Liquid Applicator Single-Handed Operation
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Solution Overview
Problem
Existing liquid applicator devices require two-handed operation to remove the protective cap, which is inconvenient and inefficient.
Innovation Solution
A retractable liquid dispenser device with a sliding mechanism that allows single-handed operation, featuring a retractable valve and actuator to extend and retract the liquid dispenser, enabling easy cap removal and preventing evaporation by closing the valve when not in use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a protective cap is used to cover the applicator tip, then evaporation of the liquid is prevented, but the device requires two-handed operation to remove the cap which reduces convenience
Solution Approach 1:
The protective cap and valve assembly are merged into a single integrated component. The cap serves dual functions: protecting the applicator tip and acting as the valve body that controls liquid flow. This eliminates the need for separate cap and valve components, enabling single-handed operation while maintaining evaporation prevention.
Solution Approach 2:
The cap is designed with multi-functionality: it protects the applicator tip from evaporation, serves as the valve body for controlling liquid flow, and incorporates the actuator mechanism for single-handed operation. This universal design allows one component to perform multiple functions that were previously required separate parts.
2Reliability
If a valve mechanism is added to control liquid flow, then liquid dispensing is improved, but the device complexity increases
Solution Approach 1:
The valve mechanism is merged with the cap assembly. The cap body forms the valve body, the seal engages with the valve seat, and the actuator on the cap operates the valve. This integration reduces the number of separate components and simplifies the overall device structure while maintaining reliable liquid flow control.
Solution Approach 2:
The cap serves as both the protective cover and the valve housing. The same component that protects the applicator also contains and operates the valve mechanism, eliminating the need for a separate valve body and reducing device complexity.
3Ease of operation
If a retractable mechanism is implemented, then single-handed operation is enabled, but the device complexity increases
Solution Approach 1:
The retractable mechanism is merged with the cap assembly. The actuator that enables single-handed operation is integrated into the cap, and the same actuator motion simultaneously performs cap removal and valve operation. This reduces the need for separate retractable mechanism components.
Solution Approach 2:
The actuator on the cap performs multiple functions: it enables the cap to be removed with single-handed pressure, it operates the valve to control liquid flow, and it works in conjunction with the spring mechanism for automatic retraction. This multi-functional actuator reduces overall device complexity.
4Quantity of substance
If the valve is automatically closed when not in use, then liquid retention is improved, but the ease of operation may be reduced
Solution Approach 1:
The spring mechanism is pre-loaded to automatically close the valve when the actuator is released. This preliminary action ensures the valve is closed by default, preventing liquid evaporation and leakage, while the user only needs to press the actuator once to open it for use.
Solution Approach 2:
The valve automatically closes itself through the spring mechanism when not in use, without requiring user intervention. The system serves itself by automatically returning to the closed state, maintaining liquid retention while keeping operation simple.
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 device allows for single-handed operation of liquid applicators, enhancing convenience and reducing evaporation by automatically closing the valve when not in use, thus improving user experience and liquid retention.
Implementation Method 1
A spring located in the closure between a spring retaining step and the valve biases the valve into a closed position
Implementation Method 2
A depression of the applicator tip onto a surface displaces the valve seal from the sealing surface for providing an annular passageway
Data Source
AI summary
A retractable liquid dispenser device comprising an outer body having a retractable mechanism slidably supporting a liquid dispenser. The liquid dispenser has a supply reservoir and a discharge reservoir with a reservoir valve disposed therebetween. A retractable valve is located in proximity to an open first end of the outer body. A first depression of the retractable actuator opens the retractable valve and moves the liquid dispenser into the extended position for enabling a depression of a distal end of the liquid applicator to open the dispensing valve to permit liquid to flow from the supply reservoir into the dispensing reservoir to dispense the applicator liquid from the distal end of the liquid applicator. A second depression of the retractable actuator moves the liquid dispenser into the retracted position and closes the retractable valve to enclose the distal end of the liquid applicator within the outer body.