Packaging Container Recessed Opening Assisting Line
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Solution Overview
Problem
Conventional packaging containers with sheet-shaped plastic cover members require troublesome operations to open, such as cutting and separating, which complicates the opening process.
Innovation Solution
A packaging container design featuring a pair of cover members with an opening portion surrounded by a linear opening assisting line portion, where at least one cover member is recessed to facilitate easy tearing, and additional features like recessed portions, holes, or slits can be used to adjust the force required for opening, and a panel can be curved to prevent contents from falling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cover members are welded to seal the packaging container, then the sealing reliability is improved, but the opening operation becomes troublesome requiring cutting and separating
Solution Approach 1:
The patent divides the cover member into two distinct regions: a sealed peripheral portion that remains welded for reliable sealing, and a separable opening portion that can be easily removed. This segmentation allows the container to maintain secure sealing while enabling simple opening operations by pulling the opening portion away from the sealed perimeter.
Solution Approach 2:
The patent extracts the opening function from the sealed structure by creating a separate opening portion that is initially connected through the welded perimeter but can be independently removed. This extraction allows the opening operation to be simplified to just pulling the opening portion away, while the sealed peripheral portion maintains its integrity and sealing reliability.
2Ease of operation
If the opening assisting line portion is made easier to tear, then the opening operation is facilitated, but the structural strength may be reduced
Solution Approach 1:
The patent applies local quality by creating a recessed portion only at the opening assisting line where easy tearing is needed, while the rest of the cover member maintains its full structural strength. The recessed portion locally reduces material thickness or density to facilitate tearing, but this localized modification does not compromise the overall structural integrity of the cover member during normal use and transportation.
3Force
If the recessed portion depth is increased to facilitate tearing, then the opening force required is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies partial action by creating a recessed portion that extends only partially through the thickness of the cover member, rather than completely through. This partial recess is sufficient to reduce the tearing force to an acceptable level while avoiding the manufacturing complexity and precision requirements of a complete through-hole or deep recess, which would be difficult to control consistently during production.
Data Source
AI summary
Provided is a packaging container that simplifies the opening operation. The packaging container includes a front cover member and a back cover member, which are attached to each other to form a housing space for accommodating an article therein. The back cover member is integrally molded from a sheet-shaped plastic. The back cover member includes an opening portion, which is surrounded by an opening assisting line portion formed in a linear form and opened by tearing the opening assisting line portion when the packaging container is opened. The back cover member is formed so that its surface is recessed at the opening assisting line portion.