Wearing Device Shoulder Strap With Target Bending Structure
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Solution Overview
Problem
Existing wearing devices, such as exoskeletons, restrict the user's freedom of movement during overhead activities due to high bending stiffness in the shoulder strap, causing discomfort and pressure on the deltoid and trapezius muscles.
Innovation Solution
The shoulder strap of the wearing device incorporates a target bending structure that reduces bending stiffness transversely, allowing it to adapt to the user's shoulder hollow, ensuring minimal pressure and maintaining freedom of movement during arm elevation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the shoulder strap is made with high bending stiffness to provide structural support, then the stability and support capability are improved, but the freedom of movement and comfort during overhead activities deteriorate
Solution Approach 1:
The shoulder strap is designed with non-uniform thickness, featuring a thinner region (second region) compared to the thicker first region. This local variation in geometric properties allows the strap to have different stiffness characteristics in different areas, enabling it to provide structural support where needed while allowing bending and adaptation to the shoulder hollow shape in the thinner region, thus resolving the contradiction between stability and ease of movement
2Stability of the object's composition
If the shoulder strap maintains a rigid shape to ensure positional stability, then the stability is improved, but the adaptability to shoulder muscle movement and shape change deteriorates
Solution Approach 1:
The shoulder strap incorporates a thinner second region that can more easily deform and adapt to the dynamic shape changes of the shoulder muscles during movement, while the thicker first region maintains greater positional stability. This local differentiation in thickness allows the strap to simultaneously exhibit both rigidity and flexibility in appropriate locations
Solution Approach 2:
The shoulder strap is designed to dynamically adapt its shape in response to muscle movements. The thinner second region specifically allows the strap to conform to the shoulder hollow shape that forms during arm elevation, enabling the strap to transition from a relatively stable configuration to one that accommodates physiological movement
3Ease of operation
If the shoulder strap is designed to lie area-contacting on the shoulder to distribute pressure, then the comfort is improved, but the bending stiffness increases causing discomfort during overhead activities
Solution Approach 1:
The shoulder strap features a thinner second region that reduces bending stiffness in the area that needs to flex during overhead activities, while maintaining sufficient contact area for pressure distribution. This local thinning allows the strap to be comfortable during movement without requiring high bending stiffness that would cause discomfort
Data Source
AI summary
A wearing device, which is designed as an exoskeleton and/or includes a tool, for wearing on the human body, including a shoulder strap with a shoulder strap resting section for resting on a shoulder of a user. The shoulder strap resting section has a target bending structure extending in the longitudinal direction of the shoulder strap for reducing the bending stiffness of the shoulder strap resting section in a bending direction transverse to the longitudinal direction of the shoulder strap, so that the shoulder strap resting section, in a state resting on the user's shoulder, can be bent in the bending direction by an elevation movement of the user's arm and a resulting formation of a shoulder hollow of the user, in order to assume a bent shape corresponding to the shoulder hollow and thus rest with its surface area against the user in the shoulder hollow.