Synthetic Resin Container Lid Segmented Locking
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Solution Overview
Problem
Existing container lids face difficulties in being detached from the mouth-neck portion of a container after consumption, as the locking means often remains locked, making detachment insufficiently easy.
Innovation Solution
A synthetic resin container lid design featuring a groove with varying axial depth and thickness, including axial and circumferential breakable lines, allows for easier detachment by disengaging the locking means from the mouth-neck portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the locking means is formed continuously in the hanging wall to ensure secure locking, then the locking reliability is improved, but the ease of detachment without special tools deteriorates
Solution Approach 1:
The continuous locking means is segmented into multiple arcuate locking portions arranged at intervals in the circumferential direction. This segmentation allows the lid to be detached by breaking individual locking portions sequentially, enabling tool-free removal while maintaining secure locking during use.
Solution Approach 2:
The groove is pre-formed to guide the breaking process of the locking portions. The groove's axial depth varies to control the breaking sequence, with deeper sections positioned to facilitate initial breaking and shallower sections for subsequent breaking, enabling systematic detachment without tools.
2Ease of operation
If the groove axial depth is uniformly great to enable breaking, then the ease of detachment is improved, but the structural strength of the hanging wall deteriorates
Solution Approach 1:
The groove's axial depth varies locally along its circumferential extent. The groove is deeper in regions where breaking is needed and shallower in regions where structural strength must be maintained. This localized variation enables controlled breaking at specific locations while preserving the overall strength of the hanging wall.
3Reliability
If the locking means extends continuously in the circumferential direction to provide comprehensive locking, then the locking reliability is improved, but the ability to detach without special tools deteriorates
Solution Approach 1:
The continuous locking means is divided into multiple discrete arcuate locking portions spaced circumferentially. This segmentation maintains comprehensive locking coverage while creating natural break points that can be sequentially fractured for tool-free detachment.
Solution Approach 2:
The locking system transitions from a static continuous structure to a dynamic segmented structure that can progressively fail. The locking portions can be broken in sequence during detachment, allowing the system to transition from a locked state to an unlocked state without requiring special tools.
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 container lid can be detached efficiently from the mouth-neck portion without the need for special tools, ensuring effective segregated waste collection.
Implementation Method 1
a thin wall is allowed to remain below the arcuate groove. When the container lid is to be detached from the mouth-neck portion of the container after consumption of the contents of the container, the upper lid brought to the opening position is forced downward or upward to break the axial breakable line, whereafter the upper lid is forced toward the upstream side in the clockwise direction (namely, forced counterclockwise) to break the thin wall retained below the arcuate groove.
Implementation Method 2
By moving an upper lid upward, for example, to force the hanging wall upward, therefore, a lower end part of the hanging wall is elastically deformed radially outwardly to disengage the locking means formed in the hanging wall upwardly from the locking jaw formed in the mouth-neck portion of the container.
Data Source
AI summary
A synthetic resin container lid (2) has a shape including a body (4), which is mounted on a mouth-neck portion (56) of a container by locking a locking means (26) to a locked means (58) of the mouth-neck portion (56), and an upper lid (6) coupled to the body (4) via a hinge means (32). The synthetic resin container lid (2) is improved so that the entire container lid (2) is fully and easily detached from the mouth-neck portion of the container.The axial depth of an annular or arcuate groove (46) formed in a hanging wall (10) of the body (4) and extending in a circumferential direction is changed as required. At least in a second break region (B) and a third break region (C), a circumferential breakable line (53) extending continuously in the circumferential direction along an axially lower end part of the groove (46) is formed in the hanging wall (10).