Selectively Openable Container Closure With Key Locking Mechanism
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Solution Overview
Problem
Existing container closures lack effective child-resistant mechanisms that prevent accidental opening by children while allowing easy access for adults.
Innovation Solution
A closure system featuring a key mechanism that moves between locked and unlocked positions, blocking access to the container's contents when locked and allowing rotation for opening when unlocked, utilizing a combination of mechanical and frictional interactions, with a key protrusion and neck blocking tab configuration to prevent rotation until unlocked.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a closure is made easily openable, then ease of operation is improved, but child-resistant protection deteriorates
Solution Approach 1:
The closure system dynamically changes its opening characteristics based on the key position. When the key is in the locked position, the closure resists rotation and cannot be opened by children. When the key is moved to the unlocked position, the closure becomes easily rotatable and simple to open. This dynamic transformation resolves the contradiction by making the closure easy to open when needed (unlocked) while providing child-resistant protection when not in use (locked).
Solution Approach 2:
The key acts as an intermediary mechanism that mediates between the user's intent to open the closure and the child-resistant protection requirement. The key protrusion interacts with the neck blocking tab to control the closure's rotatability. By introducing this intermediary element, the system achieves both child-resistant protection (when key blocks rotation) and ease of operation (when key allows rotation).
2Reliability
If a child-resistant locking mechanism is added, then child-resistant protection is improved, but device complexity increases
Solution Approach 1:
The key mechanism serves multiple functions simultaneously: it acts as a locking element (key protrusion blocking neck blocking tab), an unlocking element (when moved to allow rotation), and a control interface (key grip area for user input). By making the key multi-functional, the design achieves child-resistant protection without adding separate complex locking and unlocking mechanisms, thus resolving the contradiction between reliability and device complexity.
Solution Approach 2:
The invention merges the key mechanism with the closure structure itself. The key is coupled to the closure and works in conjunction with the neck blocking tab that is part of the closure-container assembly. This merging of components achieves child-resistant protection through a unified, integrated mechanism rather than adding separate complex subsystems, thereby improving reliability while minimizing increases in device complexity.
Data Source
AI summary
A closure for a container, and more specifically a closure that is selectively openable and/or lockable providing, for example, one or more child resistant opening features is disclosed.