Adjustable Harness Carrier Assembly for Stable Weight Distribution
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Solution Overview
Problem
Existing harnesses for carrying heavy forestry and garden equipment, such as clearing saws, often compromise comfort and weight distribution when adjusting shoulder straps for users of varying heights, leading to instability and discomfort.
Innovation Solution
An adjustable carrier assembly with a back plate and interface plate that allows for translational movement and secure locking engagement, enabling simpler size adjustments without disassembly, using raised ridges and resilient locking tabs for incremental adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the shoulder straps are adjusted to accommodate very tall or short users, then the harness can be used by users of different heights, but the comfort and weight-distributing performance of the harness is compromised
Solution Approach 1:
The back plate is divided into multiple individual adjustment elements (holes at different positions) that allow incremental adjustment of the shoulder strap attachment points. This segmentation enables the harness to be customized for different user heights while maintaining proper weight distribution geometry for each size configuration.
2Adaptability or versatility
If the shoulder straps are maximally extended for tall users, then the harness can accommodate tall users, but the harness becomes more unstable
Solution Approach 1:
The harness provides dynamic adjustability by allowing users to select different attachment hole positions on the back plate based on their height. This enables the harness geometry to be optimized for each user, maintaining stability even when accommodating tall users by preventing maximal extension and ensuring proper weight distribution.
3Adaptability or versatility
If the waist belt is placed too low on the body for short users, then the harness can accommodate short users, but it is uncomfortable and gives suboptimal weight distribution
Solution Approach 1:
The back plate includes multiple holes positioned at different heights and locations, allowing the shoulder straps to be attached at optimal positions for short users. This prevents the waist belt from needing to be placed too low, maintaining proper ergonomics and weight distribution for users of different heights.
4Adaptability or versatility
If the back plate connection uses a snap-fit type with multiple holes, then the harness can be adjusted between three distinct sizes, but disconnection and reconnection is still quite cumbersome
Solution Approach 1:
The back plate pre-provides multiple holes at predetermined optimal positions for different user sizes. Users simply need to insert the attachment pin into the appropriate hole, eliminating the need for complex disconnection and reconnection procedures while maintaining the ability to adjust between multiple sizes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates individual size adjustments, ensuring a secure and comfortable fit for users of different heights, improving weight distribution and stability during prolonged use.
Implementation Method 1
The interface plate comprises a pair of resilient locking tabs arranged to come into locking engagement with a corresponding pair of locking projections to lock the position of the interface plate with respect to the back plate
Data Source
AI summary
A carrier assembly for a harness for carrying a motor-driven power tool, the carrier assembly including a back plate and an interface plate including connections for shoulder straps. The back plate includes a coupling interface on a front face arranged to be removably connected to a corresponding coupling interface on a rear face of the interface plate. The coupling interface of the back plate is adapted to be connected to and disconnected from the coupling interface of the interface plate in an at least partially translational or linear movement which is substantially parallel to the back plate.