Self-Closing Valve Cap for Leak-Free Container Replacement
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Solution Overview
Problem
Existing caps for liquid containers, such as soap dispensers, face challenges with temporary coupling mechanisms that require precise alignment, leading to incorrect assembly and potential leaks when changing containers, as they can be easily misaligned or uncoupled improperly.
Innovation Solution
A cap with an elastic self-closing valve and a coupling edge that securely attaches to a groove, ensuring airtight and user-friendly operation, where the elastic valve automatically opens with external force and closes upon removal, minimizing the risk of leaks and incorrect assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a temporary coupling mechanism is used between the cap and suction tube, then the valve can be opened and closed, but the coupling requires precise alignment and is prone to incorrect assembly or improper uncoupling
Solution Approach 1:
The elastic valve automatically closes itself when the suction tube is removed from the cap, without requiring the user to manually ensure proper coupling or uncoupling. The elastic deformation mechanism self-regulates the valve state based on the presence or absence of the suction tube, eliminating the need for precise user alignment during container replacement.
Solution Approach 2:
The valve utilizes elastic deformation as the key parameter change mechanism. When the suction tube is inserted, it deforms the elastic valve from its closed state to an open state. When removed, the elastic material naturally returns to its original closed shape. This parameter-based control simplifies the coupling mechanism while ensuring reliable valve operation.
2Reliability
If a temporary coupling mechanism is used, then the valve can be actuated, but incorrect coupling may cause the valve to not open fully or leak when removed
Solution Approach 1:
The elastic valve self-regulates its sealing function based on the mechanical presence of the suction tube. The elastic material inherently maintains the closed position and sealing integrity when the tube is removed, without requiring precise user action to ensure proper disengagement. This self-service mechanism eliminates the need for high assembly precision during container replacement.
Solution Approach 2:
The elastic valve is pre-designed with inherent flexibility and tolerance to accommodate variations in coupling precision. The elastic deformation capability provides a buffer that absorbs misalignment or improper coupling attempts, ensuring the valve either opens correctly when intended or maintains sealing when removed, without requiring exact manufacturing or assembly precision.
3Ease of operation
If an elastic self-closing valve is used, then the valve automatically closes when removed, but external force is required to open it
Solution Approach 1:
The suction tube acts as a mechanical actuator that applies localized force to deform the elastic valve during insertion. This force application is concentrated at the point of contact between the tube and valve, efficiently opening the valve without requiring the user to apply excessive force manually. The system converts the insertion motion into the necessary valve opening force.
Solution Approach 2:
The elastic valve automatically performs the closing action without requiring user force or intervention. When the suction tube is removed, the elastic material's inherent elasticity drives the valve back to its closed position, eliminating the need for the user to apply force to close or seal the valve during container replacement.
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 cap provides a robust, user-friendly solution that ensures correct and rapid coupling, prevents leaks, and allows for precise dosing with consistent volume delivery, while being cost-effective and easy to manufacture.
Implementation Method 1
the elastic valve will automatically close itself as the container is being removed from the apparatus. In other words, the valve then automatically returns to the original closed shape
Data Source
Figure 1a
Figure 1b
Figure 2a
AI summary
The invention relates to a cap (100) provided with: a protruding edge (115) that extends radially inward towards the centre line of the cap, wherein the protruding edge comprises an upper surface (117) and a lower surface (119), a raised inside edge (125) that extends upward from the upper surface of the protruding edge (115) and that has an inner surface (127), an outer surface (128) and an upper surface (129), wherein the inner surface of the raised inside edge defines a hole (130), wherein in the hole at least one elastic self-closing valve (150) is attached.