Container Lid Inner Hinge Segmentation Prevents Twisting
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Solution Overview
Problem
Conventional container closures with a single hinge piece connecting the inner lid and discharge tube are prone to twisting when contacted by cleaning cloths or dust, leading to improper closure of the discharge port when the outer lid is pivoted closed.
Innovation Solution
The second hinge means is composed of a central hinge piece connecting the inner lid and discharge tube in the widthwise central part, with opposite side hinge pieces connecting the inner lid and discharge tube outward of the receiving projections, preventing twisting and ensuring proper closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single hinge piece connects the inner lid and discharge tube, then the device complexity is reduced, but the reliability of the closure function deteriorates due to twisting
Solution Approach 1:
The single hinge piece is divided into multiple hinge pieces (first hinge piece, second hinge piece, third hinge piece) arranged in parallel. Each hinge piece independently connects the inner lid to the discharge tube, preventing twisting while maintaining structural simplicity. The segmentation distributes mechanical stress and eliminates the twisting problem that occurs with a single hinge.
2Ease of operation
If the inner lid is contacted by cleaning cloth or dust, then ease of operation is improved, but the reliability deteriorates due to accidental twisting
Solution Approach 1:
Multiple hinge pieces are arranged in parallel to connect the inner lid to the discharge tube. This segmentation prevents twisting even when the inner lid is contacted during cleaning operations, as the distributed hinge structure accommodates minor forces without compromising the closure function.
3Speed
If the outer lid is pivoted closed with twisted inner lid, then the closing speed is improved, but the reliability deteriorates due to excessive force without proper discharge port closure
Solution Approach 1:
The parallel arrangement of multiple hinge pieces prevents the inner lid from twisting during the closing operation. This ensures that when the outer lid is pivoted closed, the inner lid remains properly aligned and the discharge port is reliably closed, eliminating the risk of excessive force being applied without proper sealing.
Data Source
AI summary
[Problems to be Solved] In a container closure (2) of a type which includes a body (4) and an outer lid (6) pivotably connected to the body, and in which a discharge tube (22) is disposed on an upper surface wall (8) of the body; an inner lid (46) is pivotably connected to the discharge tube; when the outer lid is pivotally moved from a closed position for covering the upper surface wall of the body to an open position, the inner lid is pivotally moved from a closed position for closing a discharge port present at the tip of the discharge tube to an open position for opening the discharge port; and when the outer lid is pivotally moved from the open position to the closed position, the inner lid is pivotally moved from the open position to the closed position, the inner lid is prevented from becoming twisted. [Means to Solve the Problems] A second hinge means (44) connecting the inner lid pivotably to the discharge tube is composed of a central hinge piece (44a) connecting the inner lid and the discharge tube in a widthwise central part of the inner lid, and opposite side hinge pieces (44b) connecting the inner lid and the discharge tube on both outer sides in the width direction.