Child-Resistant Cap with Radial Squeeze Actuator
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Solution Overview
Problem
Conventional child-resistant cap assemblies often fail to strike a balance between being intuitive and non-cumbersome for adults while being prohibitively difficult for children, and they are not cost-effectively manufacturable.
Innovation Solution
A child-resistant container design featuring a cap with a cover member, an inner member, and an outer member that includes a squeeze actuator with pads, allowing for selective movement between positions to facilitate or hinder rotational movement, combined with a container body projection that engages the cap to limit or enable twist-off directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional child-resistant cap assemblies are designed to be difficult for children to open, then child deterrence is improved, but adult ease of use deteriorates
Solution Approach 1:
The cap assembly employs dynamic elements including a movable outer member that can shift radially between engaged and disengaged positions, and a flexible wall that can deform under squeezing force. These dynamic features allow the cap to transition between a locked state (resisting child opening) and an unlocked state (allowing adult opening), resolving the contradiction between child deterrence and adult ease of use
Solution Approach 2:
The invention changes the physical state of the cap assembly through parameter changes: the outer member moves between radial positions, the wall transitions between flexible and rigid states, and the engagement between cap and container body changes from engaged to disengaged. These parameter changes enable the cap to provide strong resistance to children while allowing easy operation by adults who can apply the specific squeezing action
2Reliability
If child-resistant cap assemblies are made more complex to improve child deterrence, then child deterrence is improved, but device complexity increases
Solution Approach 1:
The cap assembly is segmented into distinct functional components: a cover member, an inner member, an outer member, and a flexible wall. Each segment performs a specific function ( sealing, structural support, radial movement, flexibility), allowing the complex child-resistant mechanism to be broken down into simpler, more manageable parts that are easier to manufacture and assemble
Solution Approach 2:
The outer member serves multiple functions: it provides structural support, enables radial movement for engagement/disengagement, and works with the flexible wall to create the child-resistant mechanism. This multi-functionality reduces the need for additional separate components, thereby reducing overall device complexity while maintaining effective child deterrence
3Reliability
If conventional child-resistant cap assemblies are designed with enhanced child deterrence features, then child deterrence is improved, but manufacturing cost increases
Solution Approach 1:
The invention employs a flexible wall that can deform under squeezing force to enable the outer member to move radially. This flexible film approach is simpler and more cost-effective to manufacture than rigid mechanical mechanisms with multiple moving parts, while still achieving the required child deterrence functionality
Solution Approach 2:
The cap assembly uses a nested structure where the inner member is positioned within the outer member, and both are contained within the cover member. This nesting arrangement consolidates multiple components into a compact configuration that reduces assembly complexity and manufacturing cost while maintaining the child-resistant mechanism
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 design effectively deters children from opening the container while maintaining ease of use for adults, with features that are also cost-effective to manufacture and adaptable to various packaging types.
Implementation Method 1
The projection includes a receiving aperture that receives at least part of the outer member when the outer member is in the first position and the cap is contemporaneously rotated in the twist-off direction
Implementation Method 2
The first and second pads are configured for manual squeezing along the squeeze axis for selective movement of the outer member from the first position toward the radially displaced position
Implementation Method 3
The neck engages with the inner member to support rotational movement of the cap in a twist-off direction and a twist-on direction about the axis
Data Source
Figure 1A~1B
Figure 2
Figure 3~4
AI summary
A child-resistant container includes a cap with an outer member moveable relative to the axis radially between a first position and a radially displaced position. The container also includes a container body with a neck that engages with an inner member of the cap. The container body has a projection that engages the outer member and limits rotational movement of the cap when the outer member is in the first position and the cap is contemporaneously twisted-off. The outer member bypasses the projection when the outer member is in the radially displaced position and the cap is contemporaneously twisted-off. The projection includes a receiving aperture that receives at least part of the outer member when the outer member is in the first position and the cap is contemporaneously twisted off.