Backpack Triangular Pad System for Forward Head Posture
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Solution Overview
Problem
Conventional backpack designs often lead to forward head posture (FHP) due to the shifting of the center of gravity, causing compression, muscle strain, and potential degenerative disc and joint diseases, especially in children and adolescents whose spines are still developing.
Innovation Solution
The use of a backpack design featuring sternal, sacral, and dorsal pads positioned in a triangular configuration to shift the center of gravity superiorly and proximally, offloading shoulder and neck muscles, and distributing the weight more ergonomically to reduce FHP.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If conventional shoulder strap backpacks are used, then the backpack can carry moderate to heavy weight, but the center of gravity shifts backward causing forward head posture and cervical spine compression
Solution Approach 1:
The patent transitions from conventional 2-strap shoulder support to a 3-point suspension system adding the sternal pad dimension. This creates a triangular load distribution geometry (sternal pad, sacral pad, and dorsal pad) that fundamentally changes how weight is borne, shifting from shoulder muscles to skeletal structures and eliminating the backward center of gravity shift that causes forward head posture
Solution Approach 2:
The patent applies localized padding at specific anatomical contact points (sternal pad at the sternum, sacral pad at the lower back, dorsal pad at the upper back) to distribute weight across bony prominences. This localized weight bearing at strategically positioned points prevents concentration of force on soft tissues and cervical spine, resolving the compression problem while maintaining heavy weight capacity
2Weight of moving object
If the center of gravity is shifted backward in conventional backpacks, then the load can be carried on the back, but this creates a long lever fulcrum causing muscle strain in the neck and shoulders
Solution Approach 1:
By adding the sternal pad contact point in the anterior dimension, the patent creates a triangular support geometry that shortens the lever arm. The weight is now distributed across three points forming a stable triangle, reducing the moment arm distance from the load to the body's center of gravity, thereby decreasing the torque and muscle strain force required to maintain posture
Solution Approach 2:
The patent positions the three pads (sternal, sacral, dorsal) to create a balanced weight distribution that aligns the backpack's center of gravity with the wearer's center of gravity. This equipotential positioning eliminates the need for compensatory muscle forces, as the load is evenly distributed across the skeletal framework rather than creating unbalanced moments that require active muscle correction
3Weight of moving object
If forward head posture develops to compensate for backward weight shift, then the backpack weight can be carried, but this creates compressive pressure on cervical intervertebral discs and potential degenerative disc disease
Solution Approach 1:
The addition of the sternal pad creates a three-dimensional load distribution system that prevents the backward weight shift inherent in 2-strap designs. By anchoring the strap at the sternum (anterior) in addition to the sacrum (posterior) and upper back (dorsal), the system maintains the backpack's center of gravity aligned with the wearer's spine, eliminating the forward head posture compensation that causes cervical disc compression
Solution Approach 2:
The sternal pad acts as an anterior counterweight that balances the posterior and dorsal pad positions. This creates a triangular force distribution where the sternal pad's anterior position counteracts the backward weight shift, keeping the overall center of gravity aligned with the cervical and thoracic spine, thereby preventing excessive compressive stress on cervical intervertebral discs
Data Source
AI summary
A method of reducing forward head posture is disclosed herein. Such a method may include: providing a backpack that includes a sternal pad included on one or more shoulder straps, a sacral pad, and one or more dorsal pads; positioning the sternal pad included on the one or more shoulder straps on a wearer's sternum and upper anterior ribs; positioning the sacral pad on the wearer's thoracolumbar junction, such that the sacral pad spans at least a portion of a bottom of the backpack; and positioning the one or more dorsal pads on the wearer's spine and shoulder, where the sternal pad, the sacral pad, and one of the one or more dorsal pads when positioned on the wearer are arranged in a triangular configuration when viewed from a side perspective of the wearer.