Backpack Dorsal Carry Assist Sling Weight Distribution
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Solution Overview
Problem
Current solutions for assisting the dorsal carrying of heavy backpacks or satchels are either bulky, impractical, or fail to distribute the weight effectively, leading to spinal imbalances and discomfort, and are often not removable or compactable, making them unsuitable for school environments.
Innovation Solution
A removable dorsal carry assist device comprising a sling that clasps a portion of the bag and the hips, with a retaining mechanism to secure it to the bag, allowing weight distribution from the shoulders to the lumbar and abdominal regions, and an optional stabilizing sling to maintain the bag's inclination, ensuring stability and comfort during movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If rigid frames are used to assist dorsal carrying, then weight relief is provided, but the device becomes bulky and unsightly
Solution Approach 1:
The device is divided into separate components: a lightweight frame structure with horizontal bars and a removable platform. This segmentation allows the frame to provide structural support for weight relief while keeping individual components compact and less bulky than a solid rigid frame would be.
2Volume of moving object
If belts with platforms are used, then the device becomes more compact, but the bag is not held securely during movements
Solution Approach 1:
The platform is designed with a curved, concave surface that conforms to the shape of the backpack. This curvature creates a snug fit that secures the bag during movements while maintaining a compact profile, eliminating the need for bulky retaining structures.
3Ease of operation
If a removable device is used, then the device is easier to store, but the bag may slip off during movements
Solution Approach 1:
The curved platform surface creates friction and geometric interlocking with the backpack shape, providing secure retention during movements. This allows the platform to be removable for storage while maintaining reliability during use without requiring complex fastening mechanisms.
Data Source
AI summary
A device to assist the dorsal carrying of a backpack-type or satchel-type bag by an individual, such as a child or a teenager. The bag includes a pair of shoulder straps. The dorsal carry assist device includes a carrying sling to carry the bag and a retaining sling. The carrying sling clasps a portion of the bag and the hips of the individual, without clasping the bag entirely. The retaining sling removably retains the carry sling to the bag and includes a fastener to open and close the retaining sling. When the retaining sling is closed, the retaining sling forms together with a central portion of the carry sling a loop which is configured to clasp entirely a lower portion of the bag when it is carried according to a carry axis. The dorsal carry assist device preferably includes a stabilizing sling configured to stabilize the bag.