Plug With Radial Compression Ribs for Liquid Containers
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Solution Overview
Problem
Existing liquid container plugs face challenges with needle insertion and liquid leakage due to axial compression of elastic bodies, leading to increased resistance and the 'liquid splash' phenomenon when the needle is inserted or pulled out.
Innovation Solution
A plug design featuring a columnar elastic body with axially extending longitudinal ribs and grooves on the inner wall surface, which reduces axial compression and applies compression stresses orthogonally, facilitating easy needle insertion and preventing liquid splash during withdrawal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the elastic body is compressed axially by press-fitting the crown body, then the sealing pressure is improved, but the resistance to needle insertion increases
Solution Approach 1:
The invention transitions from axial compression to radial compression by providing protrusions on the inner peripheral surface of the crown body that compress the elastic body in the radial direction, thereby reducing axial compression and needle insertion resistance while maintaining sealing pressure
2Reliability
If the elastic body is evenly compressed from all directions, then liquid leakage is prevented, but the liquid splash phenomenon occurs during needle withdrawal
Solution Approach 1:
The invention applies different compression characteristics to different regions of the elastic body by providing multiple protrusions at specific positions, creating localized compression zones that prevent uniform compression and thereby reduce liquid splash during needle withdrawal while maintaining leakage prevention
3Ease of manufacture
If the crown body is press-fitted along the axial direction, then the assembly process is simple, but the elastic body structure becomes complex
Solution Approach 1:
The invention changes the compression direction from axial to radial by designing protrusions on the inner peripheral surface of the crown body, thereby simplifying the elastic body structure while maintaining the press-fitting assembly process
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 smooth needle insertion and prevents liquid splash when the needle is pulled out, ensuring minimal leakage and improved usability for liquid containers.
Implementation Method 1
an elastic body having a slightly smaller outer diameter is inserted into a cylindrical tap, and then a crown part having a protruded pusher pressing the elastic body is brought into contact with the elastic body under pressure, so as to apply a pressure to the elastic body
Data Source
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AI summary
A plug in accordance with one aspect of the present invention is a plug for a container for containing a liquid, the plug comprising a plug body, a lid adapted to engage the plug body, and a columnar elastic body contained in the plug body and pierceable with an extraction needle; the plug body having an elastic body storage part for storing the elastic body, a liquid guide path communicating with the elastic body storage part, a plurality of axially extending longitudinal ribs formed on an inner wall surface facing the elastic body storage part, and axially extending groove parts formed between the plurality of longitudinal ribs, while a circle passing vertexes of the plurality of longitudinal ribs has a diameter smaller than that of the elastic body.