Pencil-Type Liquid Dispensing Container With Folding Link Mechanism
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Solution Overview
Problem
Existing containers for dispensing volatile liquid contents, such as eyeliner and lip-gloss, face challenges in maintaining stability and reliability due to varying resilience forces of pump tubes, which are affected by temperature changes, leading to inconsistent dispensing and increased manufacturing costs.
Innovation Solution
A container design featuring a folding link mechanism driven by a pressure button, where a piston connected to the folding link compresses a cylinder tube to discharge content, and a spring-driven piston refills the tube, ensuring stable operation through a check valve system, independent of environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a pump tube is used to discharge content by compression and restoration operations, then the structure is simplified and manufacturing costs are reduced, but the resilience force of the pump tube varies with temperature changes causing unstable dispensing
Solution Approach 1:
The patent replaces the pump tube with a piston-cylinder assembly where the piston is driven by a spring mechanism. This changes the operating principle from elastic recovery (temperature-dependent) to mechanical spring-driven motion (temperature-independent), resolving the contradiction between manufacturing simplicity and dispensing stability
Solution Approach 2:
The patent uses a folding link mechanism that copies the simplified structure of the pump tube while achieving more reliable operation. The folding link translates the pressure button's linear motion into piston motion, maintaining structural simplicity while eliminating temperature sensitivity
2Manufacturing precision
If a screw rod and piston screw-coupled mechanism is used to transport content, then preset quantity dispensing is achieved, but the mechanism is complicated requiring more workers and assembly time
Solution Approach 1:
The patent extracts the essential function of preset quantity control from the complex screw rod mechanism and implements it through a simpler spring-driven piston system with a check valve. The check valve ensures unidirectional flow while the spring provides consistent force, achieving precise dosing without the complexity of threaded connections
Solution Approach 2:
The spring mechanism automatically provides the force needed to drive the piston, eliminating the need for complex drive mechanisms. The check valve automatically controls the direction of content flow, reducing the need for complex control systems while maintaining preset quantity dispensing
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 design achieves stable and consistent dispensing of a preset quantity of liquid content across varying temperatures, enhancing reliability and reducing manufacturing complexity and costs, enabling mass production.
Implementation Method 1
the piston moves forward due to a resilience force of a spring
Data Source
AI summary
Disclosed is a pencil-type case for allowing pressing a pressure button to discharge liquid content out to a content brush. The container for dispensing a preset quantity of liquid content accommodated in a main body by pressing a pressure button. The container includes: main body including content case to accommodate content in outer body and having pushing member; pumping member including: folding link driven by pressure button; check valve preventing content from flowing backward when content is introduced into cylinder tube via content-introducing hole formed in cylinder tube, and piston pumping content out to content brush of content brush body; and content brush body including: content-introducing tube in which check valve is installed; cam surface adjusting stroke of folding link; and content brush provided at leading end to discharge content of content-introducing tube.