Squeeze-Release Blister Card Package for Child Resistance
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Solution Overview
Problem
Current packaging solutions for pills and tablets lack a balance between child-resistant and senior-friendly dispensing, and there is a need for a cost-effective method to assemble such packages.
Innovation Solution
A package design featuring an elongate outer sleeve with a locking mechanism and a blister card that slides in and out, using visually defined squeeze locations and an internal locking restriction to secure the card, allowing easy access for seniors while preventing access by children.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking mechanism is added to prevent child access, then child resistance is improved, but device complexity increases
Solution Approach 1:
The package is divided into separate functional components: an outer sleeve providing structural protection, an inner blister card holding tablets, and a locking mechanism with movable ledge and catch. This segmentation allows each component to perform its specific function while simplifying the overall design compared to integrated complex mechanisms.
Solution Approach 2:
The locking mechanism operates through self-service principles where the movable ledge automatically engages with the catch when the blister card is inserted, and the spring-loaded reversely-folded flap automatically resets after each locking cycle. The squeeze-release mechanism also self-activates when pressure is applied, eliminating the need for additional actuators or complex control systems.
2Reliability
If a locking mechanism is added to prevent child access, then child resistance is improved, but ease of operation deteriorates
Solution Approach 1:
The package structure incorporates localized flexibility at specific points: the outer sleeve has defined squeeze zones with reduced stiffness, the locking ledge is movable rather than fixed, and the reversely-folded flap is spring-loaded. These local quality variations allow the structure to be rigid enough for child resistance while being easily operable by adults at designated points.
Solution Approach 2:
The locking mechanism utilizes parameter changes in the form of mechanical displacement: the movable ledge shifts position when the sleeve is squeezed, transitioning from an engaged locked state to a disengaged unlocked state. The spring-loaded flap changes its folded state based on the locking cycle, providing automatic reset functionality that simplifies operation.
3Reliability
If the card width closely matches the void width, then child resistance is improved by preventing squeezing, but ease of operation deteriorates as squeezing becomes difficult
Solution Approach 1:
The package design implements local quality by creating specific zones of reduced structural rigidity: the outer sleeve incorporates defined squeeze zones with localized flexibility, while the card width closely matches the void width in non-squeeze areas. This allows the structure to resist unauthorized access while enabling intentional operation at designated points.
Solution Approach 2:
The structural design segments the package into rigid containment areas (where card width matches void width for child resistance) and flexible operation zones (defined squeeze locations with reduced stiffness). This segmentation allows simultaneous achievement of both child resistance and ease of operation at designated points.
Data Source
AI summary
A package for containing tablets or like separate dispensable items is provided having so-called child-resistant and senior-friendly storage and dispensing properties. An elongate outer sleeve houses a separate blister card carrying tablets or like items. The card slides into the sleeve to a storage position in which the card is housed within the outer sleeve and slides in the reverse direction to a dispensing position in which the card at least partially extends from the open end of the sleeve. The sleeve includes an internal locking restriction secured to a wall thereof, and the card includes a tail end having an integral latch. The locking restriction and latch cooperate to form a locking engagement thereby locking the card within the sleeve when the card is in the storage position. The sleeve includes visually defined squeeze locations on opposite side edges thereof that correspond to a location of the internal locking restriction. The locking engagement of the latch to the internal locking mechanism is released when the outer sleeve is squeezed at the visually defined squeeze locations. The construction of the outer sleeve from a paperboard blank, the construction of a blister card having a latch, and a method of assembling the above referenced package are also disclosed.