Child-Resistant Packaging Slider Locking Mechanism
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Solution Overview
Problem
Current child-resistant packaging for pharmaceutical products, particularly blister packs, is inadequate in preventing access by children, as existing mechanisms can be easily bypassed, leading to potential misuse.
Innovation Solution
A packaging design featuring a slider with a locking edge that engages with the outer sleeve's locking edges, requiring a sequence of operations to access the contents, including sliding the slider further into the sleeve and pressing a release button to deflect the locking edge, thereby preventing accidental withdrawal and enhancing child resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple locking mechanism is used to prevent child access, then ease of manufacture is improved, but child resistance deteriorates
Solution Approach 1:
The locking mechanism transitions from a static state to a dynamic sequence of operations. The slider must be moved to a specific position, then the release button pressed, creating a dynamic unlocking sequence that is more resistant to child access while remaining manufacturable using standard packaging techniques
Solution Approach 2:
The locking mechanism is segmented into distinct functional components: the slider with locking edge, the release button with actuating edge, and the engagement features on the container wall. This segmentation allows each component to be manufactured separately using standard processes while assembling into a reliable child-resistant system
2Reliability
If a complex locking mechanism is used to enhance child resistance, then child resistance is improved, but device complexity increases
Solution Approach 1:
The locking and release functions are merged into a integrated slider assembly. The slider body incorporates both the locking edge for engagement and the release button for disengagement, reducing the number of separate components while maintaining child resistance through the required sequence of operations
Solution Approach 2:
The mechanism uses the slider's own movement to facilitate locking and unlocking. When the slider is pulled to access contents, the locking edge naturally engages with the container wall. The release button utilizes the slider's existing structure to provide the disengagement function, eliminating the need for separate locking devices
3Reliability
If a locking mechanism requiring sequence of operations is used, then child resistance is improved, but ease of operation deteriorates
Solution Approach 1:
The slider is pre-positioned in a locked state during manufacturing, and the locking edge is pre-configured to engage with the container wall at a specific location. This preliminary arrangement ensures that the sequence of operations (pull slider, press release button) is intuitive and can be performed correctly by adult users despite the added steps
Data Source
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AI summary
A package includes an outer sleeve (102) and a slider (104) for holding a blister pack slidably mounted within the outer sleeve. The outer sleeve (102) has a locking edge (50) arranged on an interior of a wall thereof. The slider (104) has a locking flap (92) formed at a terminal end of the slider extending in a direction away from the closed end of the outer sleeve for engagement with the wall of the outer sleeve. The flap (92) has a free edge which provides a pair of locking edges (90a, 90b) for engagement with the locking edge (50) of the outer sleeve wall to prevent the slider from being withdrawn from the outer sleeve in a locked position. The outer sleeve (102) has a release button (24) which may be pressed to deflect the slider flap (92) away from the wall of the outer sleeve and enable the free edge of the slider flap (92) to slide past the locking edge (50) to allow the slider to be withdrawn from the outer sleeve. This is possible only when the slider is inserted into the outer sleeve to a position intermediate its locked position and a fully inserted position in which the slider is fully inserted into the outer sleeve.