Squeeze and Lift Child Resistant Safety Cap Mechanism
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Solution Overview
Problem
Existing child-resistant safety caps are ineffective in preventing access by young children due to failure in proper alignment and squeezing mechanisms, as they do not adequately secure the conventional container closure.
Innovation Solution
A squeeze and lift child-resistant safety closure system that includes an inner and outer member with interlocking components, where the members are designed to change shape from circular to oval upon squeezing, allowing relative movement to expose the conventional container closure, featuring protrusions and ledges that align and clear each other upon proper indicia alignment and pressure application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the safety cap uses a conventional closure mechanism, then it is easy to open, but it fails to provide child-resistant protection
Solution Approach 1:
The closure is divided into two separate members: an inner member that provides child-resistant protection and an outer member that provides easy opening. The inner member contains the conventional closure mechanism while the outer member contains the squeeze-release mechanism. This segmentation allows each member to independently provide its specific function without interfering with the other.
Solution Approach 2:
The inner member is nested within the outer member, with the inner member's circular bottom receiving the outer member's circular bottom. The protrusions on one member fit into recesses on the other member, creating a nested configuration where the inner member is contained within the outer member's structure.
2Reliability
If the safety cap uses a complex alignment and squeezing mechanism, then it provides child-resistant protection, but it is difficult to operate properly
Solution Approach 1:
The patent uses visual indicia (such as colored bands, arrows, or symbolic markings) on the outer member to indicate the correct squeezing location and direction. These visual cues guide users on where to apply force and how to operate the mechanism, making the complex squeezing action more intuitive and easier to perform correctly.
3Reliability
If the protrusions are wide to prevent removal, then the safety cap is secure, but it cannot be removed when needed
Solution Approach 1:
The protrusions are designed to be dynamically responsive to applied force. Under normal conditions, the wide protrusions securely engage with the recesses to prevent removal. However, when squeezing force is applied to the outer member, the protrusions are forced inward to clear the ledges, allowing the outer member to be lifted away. This dynamic behavior allows the same structure to provide both security and controlled removal.
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
Effectively denies access to the conventional container closure until the outer member is squeezed, ensuring the child-resistant mechanism is engaged, thereby preventing accidental opening by young children.
Implementation Method 1
squeezing an outer member or inner member to flex it from a circle to an oval to permit removal or separation
Data Source
AI summary
A squeeze and lift child resistant safety closure for attachment to a container having a conventional container closure on its top includes: an inner member for attachment to either the container or its closure, the inner member having an outer member interlocking component, being one of a circular track and a circular rail, the circular track having inside and outside ledges with a track space between the inside and outside ledges, the track space having a predetermined track space width, the circular rail having inside and outside protrusions adapted to ride inside the track space and under the ledges, the protrusions having widths less than the track space width and greater than one half the track space width; and an outer member being an outer closure having a circular bottom that is semi-flexible, and at its circular bottom, having the other of the one of a circular track and a circular rail. When the inner member is attached to a container under its conventional closure and the inner member and the outer member are interconnected, access to the convention closure is denied. However, if a user squeezes the outer member at the squeeze indicia to flex the outer member from circular to oval, the outer member can be removed to expose the conventional container closure for normal opening.