Bicycle Cargo Pack Structure With Internal Battens and Rear Access
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Solution Overview
Problem
Existing cargo packs for bicycles lack rigidity, leading to weight addition and potential abrasion issues, and trunk bags with top openings are obstructed by the saddle, complicating access.
Innovation Solution
A cargo pack with an outer casing and internal stiffening elements secured by fasteners, mounted to a cargo rack via front and rear structures, providing rigidity and easy access without additional weight or obstruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If internal reinforcements are added to enhance rigidity, then the rigidity of the cargo pack is improved, but the construction complexity increases
Solution Approach 1:
The cargo pack is divided into distinct functional components: the flexible outer casing, separate stiffening elements, and mounting structures. This segmentation allows each component to be optimized independently - the outer casing remains simple and flexible, while the stiffening elements provide targeted rigidity where needed without complicating the overall construction
Solution Approach 2:
Stiffening elements are strategically positioned at specific locations within the cargo pack - particularly at the front and rear mounting structures and along the attachment wall - rather than uniformly throughout. This local reinforcement provides rigidity exactly where structural support is needed for mounting and load-bearing, while keeping other areas flexible and simple
2Ease of operation
If top openings are used for loading, then the loading access is provided, but the saddle obstructs access to the cargo pack
Solution Approach 1:
Instead of opening at the top of the cargo pack, the loading opening is inverted to be located at the rear end. This reversal of the conventional opening location eliminates interference from the bicycle saddle, allowing riders to easily load and access cargo from behind without any obstruction from the saddle or seat structure
3Weight of moving object
If soft packs without inherent rigidity are used, then the weight of the pack is reduced, but additional support structure is required which adds weight
Solution Approach 1:
The stiffening elements are integrated directly into the mounting structures of the cargo pack, merging the structural reinforcement function with the mounting function. This integration eliminates the need for separate, complex support structures while maintaining the lightweight flexible outer casing, thus avoiding additional weight from redundant structural components
Data Source
AI summary
A cargo pack for attachment to a bicycle comprises an outer casing of flexible material which is provided with a reinforcing and mounting structure which includes internal stiffening elements in the form of elongate battens secured adjacent an attachment wall of the outer casing. The battens are each secured to front and rear mounting structures which are disposed on the external surface of the attachment wall and are secured to the stiffening elements by fasteners extending through the material of the attachment wall. The outer casing can be packed and unpacked through a rear portion of the casing, unhindered by the battens.