Drip Bag Hooking Member Design for Wide Opening on Small Cups
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Solution Overview
Problem
Conventional drip bags face difficulty in opening the bag main body sufficiently when hooked onto cups with small opening diameters, making it hard to pour hot water due to bending of arm portions and inadequate pulling force.
Innovation Solution
The design includes hooking members with arm portions having fixed edges inclined relative to the bag's width direction, preventing bending and ensuring the bag main body is pulled open effectively by twisting the arm portions, even with small cup openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the arm portions are pulled up from the bag main body to open the opening portion, then the opening portion opens wider for cups with large opening diameters, but the opening portion opens small for cups with small opening diameters
Solution Approach 1:
The fixed edge of the arm portion is designed to be asymmetric with respect to the bag main body, extending downward vertically from the lower end of the side closer to the side of the bag main body. This asymmetric configuration creates a twisting motion when the arm portion is pulled up, preventing the lower end from bending against the bag main body and enabling effective opening even when hooked onto cups with small opening diameters.
2Force
If the lower ends of the arm portions are positioned to pull the bag main body effectively, then the bag main body opens wider, but the lower ends of the arm portions bend against the bag main body making it difficult to pull
Solution Approach 1:
The fixed edge of the arm portion is configured to extend downward vertically from the lower end of the side closer to the side of the bag main body, creating a curved or angled path rather than a straight horizontal connection. This curved configuration prevents the lower end of the arm portion from bending against the bag main body during the pulling operation, reducing resistance and making it easier to pull the arm portions upward to open the bag.
Data Source
AI summary
A drip bag includes a bag main body formed of a water permeable filter sheet and hooking members made of a thin plate-like material on two opposite outer surfaces. Each hooking member includes upper bonded, central, and a pair of arm portions from the central to toward the upper bonded portion, and a pair of hooking portions. The arm portions are spaced apart from each other with a bag main body width center line between them. Each hooking portion extends downward and is not bonded onto the bag main body. Each arm portion can be pulled up from the bag main body at an upper part, and has a fixed edge fixed onto the bag main body at a lower part. The fixed edge is inclined relative to a bag main body width direction. A bag main body opening portion opens wider even when a cup opening diameter is small.