Carton Board Package With Child-Resistant Locking Mechanism
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Solution Overview
Problem
Existing carton board packages lack a child-resistant locking mechanism that is both difficult for children to open and simple in construction, while also being re-closable multiple times.
Innovation Solution
A carton board package design featuring a locking mechanism with a foldable outer casing and a hinged inner casing flap, utilizing creasing and cutting to create contacting points for a child-resistant opening mechanism that allows multiple re-closures, where the inner casing is connected to the outer casing via these points until first opening, and the flaps are arranged to ensure secure closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a child-resistant locking mechanism is added to a carton board package, then the security against children is improved, but the device complexity increases
Solution Approach 1:
The package is divided into an outer casing and an inner casing that can be separated. The locking mechanism is segmented into a locking part on the outer casing and a flap on the inner casing. This segmentation allows the child-resistant function to be achieved through a simple two-part structure rather than a complex integrated lock, resolving the contradiction between security and simplicity.
Solution Approach 2:
The inner casing is nested within the outer casing in a slideable manner. The flap of the inner casing interacts with the locking part of the outer casing to provide the child-resistant function. This nesting arrangement allows the locking mechanism to be formed by the interaction of simple geometric shapes rather than complex mechanical components, maintaining construction simplicity while achieving child resistance.
2Ease of operation
If a locking mechanism is designed to be re-closable multiple times, then the usability is improved, but the device complexity increases
Solution Approach 1:
The locking mechanism is designed with dynamic elements including a slideable inner casing and a foldable flap with creases. The flap can be folded along crease lines to lock and unlock the package, and the inner casing can slide in and out. These dynamic, simple movements enable multiple re-closures without requiring complex mechanical systems, resolving the contradiction between usability and simplicity.
3Reliability
If the flap is made shorter to allow locking part space, then the child resistance is improved, but the structural integrity may worsen
Solution Approach 1:
The flap is designed with specific geometric parameters including creases at defined positions and a length that is optimized to provide both locking security and structural strength. The creases create rigid folded sections that maintain strength while the overall length is kept shorter than the full face side length to allow space for the locking part. This parameter optimization resolves the contradiction between locking security and structural integrity.
Data Source
Figure 1
Figure 2
AI summary
A package, which comprises an outer casing (2) and an inner casing (3) accommodated slidably within the outer casing. The package is formed of a package blank (1) which comprises parallel first and second side edges (4, 5), defining a length direction of the blank, and parallel first and second face sides (6, 7) perpendicular to the side edges, defining a width direction of the blank. The blank (1) further comprises a flap (8), which has a first end (9) and a second end (10) in the width direction of the blank, a fold area (11), which is foldable between an end of the flap (8) and the side edge of the blank, and a first and a second opening flap (12, 13), said flaps are arranged in a same line with the first and the second end of the flap (8) in the length direction of the blank.