Packaging Box Recessed Holding Unit Prevents Core Damage
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Solution Overview
Problem
Existing packaging boxes for roll-shaped materials often damage the cylindrical core due to rubbing between the core and the holding unit, leading to issues like paper shavings contaminating inkjet printers and causing printing defects.
Innovation Solution
A packaging box with a prism-shaped case body and side surface portions formed from a single sheet member, featuring a holding unit with recessed portions that reduce contact with the cylindrical core's end portion, preventing damage and integrating the holding unit with the side surface portions for secure holding without separate components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the holding unit is inserted into the cylindrical core to hold the roll-shaped material, then the roll-shaped material can be securely held within the prism-shaped case body, but rubbing occurs between the end portion of the cylindrical core and the holding unit, causing damage and generating shavings
Solution Approach 1:
The holding unit incorporates a recessed portion at the specific location where it contacts the cylindrical core. This local structural modification creates a non-contact region that prevents rubbing and damage to the core, while maintaining the holding function in other areas through the flange portion that contacts the roll-shaped material.
Solution Approach 2:
The recessed portion acts as an intermediary structural feature between the holding unit and the cylindrical core. By creating this recessed space, the design allows the holding unit to be inserted into the core without direct contact between the end portion of the core and the holding unit, thereby preventing damage while maintaining secure holding.
2Reliability
If the holding unit is designed to insert deeply into the cylindrical core for secure holding, then the roll-shaped material is firmly held, but the end portion of the cylindrical core is more susceptible to rubbing and damage
Solution Approach 1:
The recessed portion is strategically positioned at the location where the holding unit would otherwise contact and damage the cylindrical core. This local structural feature allows deep insertion for secure holding while creating a protected zone that prevents rubbing and material loss from the core.
3Reliability
If the holding unit is formed as a separate component from the side surface portions, then it can be independently optimized for holding function, but the device complexity increases with multiple separate components
Solution Approach 1:
The holding unit is integrally formed with the side surface portions of the packaging box, combining what would otherwise be separate components into a single unified structure. This merging maintains the holding function while reducing device complexity and eliminating the need for separate holding unit components.
Data Source
AI summary
A packaging box for a roll-shaped material wound around a cylindrical core, including a prism-shaped case body, and respective side surface portions at both ends in a longitudinal direction of the prism-shaped case body, the prism-shaped case body and the side surface portions being formed of a single sheet member, that includes a holding unit inserted into the cylindrical core of the roll-shaped material to hold the roll-shaped material within the prism-shaped case body, wherein, when the holding unit is inserted into the cylindrical core of the roll-shaped material, a region facing an end portion of the cylindrical core in a cross direction intersecting the longitudinal direction in which the prism-shaped case body extends, is formed with a recessed portion that is recessed in the cross direction.