Double Cap Liquid Container with Elastic Stopper
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Solution Overview
Problem
Conventional thermos bottles with double cap structures face issues where the inner cap can separate when tilted, leading to spills and difficulty in discharging liquids, especially with hot drinks, and the cap design restricts 360-degree discharge.
Innovation Solution
A liquid container with a double cap structure featuring an inner cap that includes a stopper and a stopper accommodation groove, allowing the inner cap to remain secure during liquid discharge while enabling separation with external force for washing and refilling, and ensuring 360-degree discharge through an extraction flow path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inner cap is designed to be held by the outer cap during liquid discharge, then the inner cap separation is prevented, but the ease of separation for washing and refilling is reduced
Solution Approach 1:
The stopper is designed with elastic material properties that allow it to change its holding force. During normal discharge, the stopper holds the inner cap securely. When external force is applied (for washing/refilling), the elastic stopper deforms and releases the inner cap, allowing easy separation.
Solution Approach 2:
The stopper mechanism transitions from a static holding structure to a dynamic one that responds to applied force. The elastic stopper can adapt its state between holding and releasing the inner cap based on the operational requirements.
2Device complexity
If the cap is designed to discharge liquid in a determined direction, then the discharge control is simplified, but the versatility of discharge direction is limited
Solution Approach 1:
The extraction flow path is designed to enable liquid discharge in multiple directions (360 degrees) rather than a single fixed direction. This dimensional change in discharge capability allows the container to adapt to different usage scenarios while maintaining simple cap operation.
3Ease of operation
If the inner cap is allowed to move freely when tilted, then the liquid discharge is facilitated, but the inner cap may separate and cause spills
Solution Approach 1:
The stopper's elastic properties allow it to maintain a holding force that prevents inner cap separation during tilting and discharge operations. The stopper adapts its constraint level based on the operational state.
Solution Approach 2:
The stopper mechanism provides a pre-established constraint that cushions against the inner cap separating during tilting. This prior constraint mechanism prevents the harmful effect of cap separation before it can occur.
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 prevents inner cap separation during liquid discharge, allows for 360-degree liquid flow, and facilitates easy separation for maintenance, ensuring safe and efficient use.
Implementation Method 1
the stopper is formed of an elastic material such that the inner cap is separable from the outer cap by a certain external force applied to the inner cap
Data Source
AI summary
A liquid container includes a container body including an inner space formed to accommodate a liquid therein and an opening formed at a top thereof to allow the liquid to flow into the inner space, an outer cap including a liquid port fastened to the opening and connected to the inner space, an inner cap inserted into the liquid port and fastened to the outer cap to open and close the liquid port to selectively connect the inner space to an outside, and a stopper fastened to the inner cap, protruding in an outward-radial direction to be held by a bottom end of the outer cap to limit a movement distance of the inner cap, and formed of an elastic material to allow the inner cap to be separable from the outer cap by a certain external force applied to the inner cap.