Vacuum Liquid Container Sealing for Quick Syringe Coupling
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Solution Overview
Problem
Existing liquid containers with vacuum pumping devices are cumbersome to use, as the cylinder requires multiple turns for attachment and detachment, leading to repeated adjustments of the threaded coupling, which complicates the process and can result in contamination due to air penetration and excessive pressure discharge.
Innovation Solution
A liquid container design featuring a syringe unit that can be easily coupled or separated by a half turn, incorporating an elastic cap for sealing and a hydraulic pressure control valve to manage liquid discharge, preventing air contamination and ensuring controlled dispensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cylinder is coupled and separated in a threaded pattern, then the vacuum pumping device can be securely attached to the container, but the user must make multiple turns (at least one full turn) which is cumbersome and time-consuming
Solution Approach 1:
The coupling mechanism is divided into two functional parts: a threaded portion for secure attachment and a cam portion for quick engagement. The threaded coupling member has both threads and a cam surface, allowing the operation to be segmented into positioning (cam) and securing (threaded) phases, reducing the total turns needed from multiple full rotations to a fraction of a turn plus a locking action.
Solution Approach 2:
The coupling system transitions from a static threaded-only mechanism to a dynamic system that combines threaded engagement with cam-based mechanical advantage. The cam surface provides a mechanical advantage that dynamically reduces the effort and rotation needed to achieve secure coupling, transforming the operation from purely rotational to a combination of rotational and leveraged motion.
2Reliability
If an elastic cap with complicated design is used for opening or closing the neck portion, then sealing can be maintained, but the cap is not easily fabricated and its elastic force deteriorates with repeated use
Solution Approach 1:
The sealing function is extracted from the complex elastic cap structure and assigned to a dedicated sealing member made of elastic material. This separate sealing component can be a simple O-ring, gasket, or membrane that is easily manufactured and replaced, while the cap body itself can have a simpler structure focused on its primary function of covering and protecting the container opening.
Solution Approach 2:
The elastic material property is applied locally only where sealing is needed (at the interface between the cap and container neck), rather than requiring the entire cap to have complex elastic features. This localized application of elasticity allows the rest of the cap structure to be simpler and easier to manufacture, while maintaining effective sealing at the critical interface.
3Productivity
If the piston is pressed to discharge content, then the liquid can be dispensed, but the maximum static friction force causes the piston to be strongly pressed, ejecting low viscosity content under too strong pressure
Solution Approach 1:
A valve mechanism is introduced as an intermediary between the piston and the liquid content. The valve controls and regulates the pressure transmission, allowing the piston to move smoothly without encountering maximum static friction. The valve opens gradually or in a controlled manner, mediating the force application to prevent sudden pressure spikes that would eject low viscosity content too forcefully.
Solution Approach 2:
The pressure parameter is changed from a sudden high-value spike to a gradually increasing or controlled value. By modifying how pressure is applied and released through the valve mechanism, the system transforms the discharge process from a high-friction sudden ejection to a controlled pressure build-up and release, preventing excessive pressure that would cause harmful spraying of low viscosity liquids.
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 allows for easy and controlled dispensing of liquids, reduces contamination risk, and simplifies refilling and recycling, while maintaining sealing efficiency and reducing environmental impact.
Implementation Method 1
an elastic cap which is mounted to the cylinder chamber and is closed in advance when the syringe unit is inserted into the cylinder chamber
Implementation Method 2
a vacuum pumping device, which allows the vacuum pumping device to be attached to or detached from the liquid container
Data Source
AI summary
Provided is a liquid container having a vacuum pumping device, which includes: a housing having a lower portion which is opened by means of an opening or closing control to be exposed to the atmosphere and an upper portion having a mounting hole so that a space is formed therein; an inner container having a cylinder chamber provided at an upper portion thereof to allow a liquid to flow in or out and a liquid store area connected to a lower portion of the cylinder chamber to change a volume according to an amount of liquid therein, the cylinder chamber being coupled to the mounting hole of the housing so that the inner housing is detachably mounted in the housing for refilling; a syringe unit coupled to or separated from the cylinder chamber to suck the liquid from the inner container and discharge the sucked liquid outwards; and an elastic cap mounted to the cylinder chamber, the elastic cap being closed in advance when the syringe unit is inserted into the cylinder chamber and opened later when the syringe unit sucks the liquid after the syringe unit is inserted into the cylinder chamber, so that the liquid is discharged while keeping a sealed state. If the liquid container having a vacuum pumping device of the present disclosure is used, the elastic cap may be easily manufactured due to its simple design and may keep its sealing force even though it is used repeatedly. Further, since the movement of a membrane may prevent even a minimum air from flowing into a filling chamber of the liquid store area while the syringe unit is being inserted, it is possible to prevent the solution from being contaminated.