Backpack Outer Enclosure Design for Balanced Expandable Capacity
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Solution Overview
Problem
Existing backpacks with modular volume capacity solutions imbalance the load distribution, particularly when carrying heavy loads, leading to back or lumbar pain, and do not offer sufficient additional volume expansion.
Innovation Solution
A backpack design featuring a main pocket with a frame and an external envelope that can be separated or attached, allowing for a flexible compartment configuration with a fastening system that transfers load to the frame for improved support and increased capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If additional envelopes are attached to the external face of the outer envelope to increase capacity, then the volume capacity is increased, but the load balance is unbalanced causing back or lumbar pain
Solution Approach 1:
The external envelope is integrated within the main pocket structure rather than attached externally. The fastening system secures the external envelope to the frame from the interior side, creating a nested configuration where the additional capacity is contained within the overall backpack envelope, maintaining balanced load distribution.
Solution Approach 2:
The invention transitions from external attachment (surface-level modification) to internal integration (three-dimensional restructuring). By fastening the external envelope to the frame within the main pocket, the load is distributed through the frame structure and shoulder straps rather than creating external imbalance.
2Volume of stationary object
If external envelopes are attached to increase capacity, then the volume is expanded, but the attachment contributes to unbalancing the load distribution
Solution Approach 1:
The external envelope is positioned and fastened within the main pocket's interior space, nesting the additional capacity within the existing structural framework. This ensures that the expanded volume does not compromise the overall stability and load balance of the backpack.
3Adaptability or versatility
If the external envelope is completely separated from the main pocket, then the modular capacity is reduced, but the load balance is improved
Solution Approach 1:
The fastening system enables dynamic reconfiguration of the backpack capacity. Users can attach the external envelope when additional capacity is needed and detach it when not required, allowing the backpack to adapt between different capacity states while maintaining proper load balance in both configurations.
Solution Approach 2:
The backpack is divided into separable modules: the main pocket and the external envelope. The fastening system connects these modules when needed, providing modular capacity adjustment without compromising load balance, as the envelope integrates with the frame structure rather than attaching externally.
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a backpack (1) comprising at least one strap (3) intended for the backpack (1) to be carried (1) by a user. The backpack (1) comprises: - a main pocket (5) connected to the at least one strap (3) and comprising a frame (7), the main pocket (5) comprising an inner surface internally defining a first compartment; - an outer enclosure (11) forming a part which is separate from the main pocket (5), and comprising an inner surface; - a fastening system (9) configured such that the backpack (1) can assume a separation configuration wherein the outer enclosure (11) is completely separated from the main pocket (5) and a fastening configuration wherein the frame (7) is rigidly attached to all or a portion of an edge of the outer enclosure (11). The inner surface of the outer enclosure (11) and the outer surface of the main pocket (5) internally define therebetween, when the backpack (1) is in the fastening configuration, a second compartment separate from the first compartment.