Umbrella Bag Bundle Side Engagement for Fall Prevention
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Solution Overview
Problem
Umbrellas with longer shafts and wider canopies pose challenges for existing umbrella bag designs, as the belt-like fall prevention mechanism may not reach the ends of the ribs or rim of the canopy, causing the bag to fall, and increasing the bag's size to accommodate these umbrellas can lead to fitting issues with existing bag opening devices.
Innovation Solution
The design features an umbrella bag bundle with a side-surface engagement mechanism, including a hole for suspension and engagement portions located strategically on the extension, allowing for secure engagement with the umbrella's side surface, and a bag opening device with a holding structure and moving mechanism to facilitate opening without interfering with the engagement portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the umbrella bag is made longer to reach the ends of ribs or rim of canopy, then the fall prevention function is improved, but the umbrella bag bundle fails to fit in the accommodation space of existing bag opening devices
Solution Approach 1:
The patent changes the engagement approach from vertical (reaching down to umbrella ends) to lateral (engaging the side surface of the umbrella shaft). The engagement portion protrudes laterally from the bag body to engage with the side surface of the umbrella, achieving reliable fall prevention without increasing the vertical length of the bag.
Solution Approach 2:
The engagement portion acts as an intermediary element between the umbrella bag and the umbrella. Instead of the bag directly reaching the umbrella ends, the engagement portion mediates by engaging the side surface of the umbrella shaft, providing a reliable connection point that doesn't require the bag to be excessively long.
2Device complexity
If the belt for fall prevention is positioned near the opening of the umbrella bag, then the structure is simple, but it cannot reach the ends of ribs or rim of canopy for long umbrellas
Solution Approach 1:
The engagement portion extends laterally from the bag body rather than positioning the belt vertically near the opening. This lateral extension allows the engagement portion to reach the umbrella side surface without requiring the bag structure itself to be longer or more complex.
Solution Approach 2:
The engagement portion is a localized structure that protrudes from a specific position on the bag body. This localized engagement mechanism provides effective fall prevention without requiring the entire bag structure to be redesigned or extended, maintaining simplicity while improving reliability.
Data Source
Figure 1(A)~1(C)
Figure 2(A)~2(B)
Figure 3(A)~3(B)
AI summary
A bag bundle including bundled umbrella bags each capable of accommodating an umbrella in a bag structure, includes a sheet-like first bag portion, a sheet-like second bag portion that is opposed to the first bag portion and constitutes the bag structure; a sheet-like extension that is extended further upward from a top end of the second bag portion; and an engagement portion that is located on the extension and capable of vertical engagement with the umbrella K. This provides an umbrella bag bundle applicable to various umbrellas without increasing the length of the entire umbrella bag bundle.