Paper Product Edge Structure for Hinge Lid Gap Prevention
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Solution Overview
Problem
Hinge lid packages made of paper face issues with deflection and deterioration at the end portions, leading to gaps between the lid and the main body, which complicates the structure and reduces durability.
Innovation Solution
The end portion structure of a paper product involves bending a paper product along a rectilinear bend line and a V-shaped ruled line, where the ruled line changes distance from the bend line, creating a restoration force that resists deflection and deterioration by acting as a tensile force when the paper is bent, and the bend portion is bonded to the end portion to maintain shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lid and main body are fitted to prevent gaps, then the gap problem is solved, but the structure becomes complicated and paper deteriorates at fitted spots
Solution Approach 1:
The invention changes the physical parameters of the paper product by introducing controlled bend lines and ruled lines that create tensile force. This transforms the paper's mechanical properties at specific locations, allowing the end portion to resist deflection without adding complex fitting structures. The parameter change approach modifies the paper's behavior through line configuration rather than structural complexity.
Solution Approach 2:
The invention segments the end portion structure by introducing distinct bend lines and ruled lines as separate functional elements. This segmentation allows each line type to perform its specific function - bend lines for controlled deformation and ruled lines for providing tensile resistance - without requiring the entire structure to be complex. The segmented approach prevents deterioration by localizing stress to specific line regions.
2Duration of action of moving object
If paper products are used repeatedly, then functionality is maintained, but deflection and deterioration occur at end portions
Solution Approach 1:
The invention applies preliminary action by pre-configuring bend lines and ruled lines during manufacturing that create inherent tensile force before use. This preliminary structural arrangement ensures that the end portion is pre-prepared to resist deflection during repeated usage, rather than relying on the paper's natural properties that deteriorate over time. The tensile force is established in advance to counteract future deflection forces.
Solution Approach 2:
The invention implements preliminary anti-action by creating a structure that generates force opposing the expected deflection before the deflection occurs. The ruled lines are positioned and configured to create tensile force that acts against the direction of potential deflection, providing preventive resistance rather than corrective action after deterioration begins.
3Ease of manufacture
If a simple structure is used, then manufacturing is easy, but gaps occur between lid and main body due to paper deflection
Solution Approach 1:
The invention achieves precise gap control by changing the parameters of line configuration rather than increasing manufacturing complexity. The bend lines and ruled lines are defined by specific geometric parameters (position, angle, spacing) that can be precisely controlled during standard manufacturing processes. This parameter-based approach maintains manufacturing simplicity while achieving the precision needed to prevent gaps.
Solution Approach 2:
The invention enables the paper product to self-regulate its structure through the inherent properties of the bend and ruled lines. The lines are configured to automatically generate tensile force that counteracts deflection without requiring external adjustment or complex assembly procedures. This self-service mechanism maintains manufacturing simplicity while ensuring precise gap prevention through the paper's own structural response.
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
This solution effectively restrains deflection and deterioration of paper products, preventing gaps between the lid and the main body, while maintaining a simple structure that resists deterioration and enhances the closure of the package.
Implementation Method 1
a bend portion 4 that connects to the end portion 2, is bent to a side of the end portion 2, and is bonded to the end portion 2
Data Source
Figure 1~1(b-4)
Figure 2
Figure 3A~3C
AI summary
An art of restraining deflection, and deterioration of an end portion of a paper product is provided. The present invention is an end portion structure of a paper product, and includes an end portion of the paper product, a bend portion that connects to the end portion, is bent to a side of the end portion, and is bonded to the end portion, a rectilinear bend line which is provided in a border between the end portion and the bend portion, and in which the bend portion is bent, and a ruled line that is provided in a vicinity of the bend line, and in the end portion or the bend portion, with a distance from the bend line changing, and is the ruled line in which the end portion or the bend portion bends when the bend portion is bent.