Adjustable Tool Harness Strap Assembly for Secure Carrying Height
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Solution Overview
Problem
Existing outdoor power tool harnesses lack adjustability and comfort, leading to potential fatigue due to improper fit and weight distribution, and often require complex or tool-dependent adjustments.
Innovation Solution
A harness with an adjustable strap assembly that allows for easy adjustment of the carrying height of the leg plate, featuring fixed anchoring points for secure fit and infinite adjustability for comfort, using an attachment toggle and an adjustable coupler to secure the leg plate to the back plate and chest buckle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the harness uses a fixed, non-adjustable strap assembly, then the structure is simple and secure, but it cannot accommodate operators of varying sizes and leads to fatigue
Solution Approach 1:
The strap assembly transitions from a fixed structure to a dynamic, adjustable system with multiple components (adjustable coupler, attachment toggle, D-rings) that allow the leg plate position to be modified based on operator size and preference, while maintaining security through locking mechanisms
Solution Approach 2:
The strap assembly is divided into separate functional components: an adjustable coupler for height adjustment, an attachment toggle for securing, and D-rings for connection points. This segmentation allows each component to perform its specific function independently while working together as a cohesive adjustable system
2Ease of operation
If the harness strap assembly allows continuous adjustment, then comfort is improved, but the security of operational settings may be compromised
Solution Approach 1:
The attachment toggle mechanism allows the operator to easily adjust and secure the leg plate position without requiring tools or complex procedures. The toggle can be manually operated to engage with the D-rings, providing self-service adjustment that is both easy to use and secure when engaged
Solution Approach 2:
The attachment toggle acts as an intermediary component between the adjustable coupler and the D-rings. It provides a reliable mechanical connection that transfers the adjusted position to a secure locked state, mediating between the ease of adjustment and the security of the setting
3Strength
If the harness requires tool-dependent adjustments, then the structural integrity is maintained, but the ease of operation and comfort are reduced
Solution Approach 1:
The attachment toggle and D-ring system enables tool-free adjustment and securing of the leg plate position. The toggle can be manually manipulated to engage with the D-rings, providing self-service functionality that maintains structural integrity without requiring external tools
Data Source
AI summary
A harness (100/200) for carrying an outdoor power equipment device may include a back plate (110/210), a leg plate (260/310) to support the device responsive to attachment of the device to the leg plate (260/310), a chest buckle (170/270) operable to alternately enable donning and doffing of the harness (100/200), and an adjustable strap assembly (280/300) operably coupled to the back plate (110/210) and the chest buckle (170/270) to enable a carrying height of the leg plate (260/310) to be adjusted. The adjustable strap assembly (280/300) may include a strap portion (302) operably coupling the leg plate (260/310) to the back plate (110/210) at a selected one of a plurality of fixed anchoring points via an attachment toggle (308) disposed at a distal end of the first strap portion (302).