Storage container for sanitary tissue paper
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Solution Overview
Problem
Existing storage containers for sanitary tissue paper face challenges in achieving both reliable holding and easy operation of the subsequent sheet, as applying higher resistance to secure holding reduces the protruding amount, making it difficult to take out the subsequent sheet.
Innovation Solution
A storage container design featuring a chamfered outlet portion with specific dimensions and radial cuts, along with a chamfered corner to reduce resistance and enhance holding, while ensuring easy extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If higher resistance is applied to the sanitary tissue paper by the outlet to secure sufficient holding function, then the holding reliability is improved, but the protruding amount from the outlet is reduced making it difficult to take out the subsequent sheet
Solution Approach 1:
The outlet portion is designed with non-uniform cross-sectional area along its length, creating different local properties: a larger opening area at the bottom for easy sheet insertion and extraction, and a smaller opening area at the top for reliable holding. This local variation in geometry allows the outlet to simultaneously provide both holding reliability and ease of operation.
Solution Approach 2:
The outlet portion utilizes the dynamic behavior of the sanitary tissue paper as it passes through. The paper is allowed to pass freely through the larger bottom opening during insertion, then becomes held by the smaller top opening after a certain point, creating a dynamic transition from easy passage to secure holding.
2Reliability
If the outlet is designed to hold the sanitary tissue paper reliably, then the holding function is improved, but the structure becomes more complex
Solution Approach 1:
The holding function and the outlet structure are merged into a single integrated component. The outlet portion itself, with its varying cross-sectional area, performs both the function of guiding the paper and the function of holding it, eliminating the need for separate holding mechanisms and reducing overall structural complexity.
Solution Approach 2:
The outlet portion achieves reliable holding by changing the geometric parameter of its cross-sectional area along its length. This parameter change from a larger bottom opening to a smaller top opening creates the holding effect without requiring additional mechanical components or complex structures.
Data Source
Figure 1
Figure 2
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AI summary
The present invention is a storage container for sanitary tissue paper, which is provided with a container body for storing sanitary tissue paper on the inside, and a lid having an extraction part (3) for extracting the sanitary tissue paper stored in the container body, wherein the extraction part (3) is provided with an extraction hole (33) through which the sanitary tissue paper is inserted and which holds said sanitary tissue paper with the tip thereof protruding from a top surface of the extraction part (3), and a chamfered part (34) in which a corner formed by an under surface (3b) of the extraction part (3) and a hole wall (33a) of the extraction hole (33) has been chamfered, both a reliability of holding the sanitary tissue paper in the extraction hole (33) and an ease of extraction work being achievable.