Pivotal Harness Carrier Assembly for Stable Load and Free Movement
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Solution Overview
Problem
Existing harnesses for carrying heavy hand-held motor-driven tools like clearing saws often result in uneven load distribution and limited movement due to rigid connections, causing strain and discomfort, especially for professional operators who need to move freely in dense environments.
Innovation Solution
A carrier assembly with a pivotal connection joint between the back plate and hip belt allows rotation about an axis perpendicular to the back plate, enabling increased freedom of movement and optimal weight distribution through a recess and tongue-shaped member design with a resilient tab and snap-fit connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid connection is used between the back plate and hip belt to maintain stable weight distribution, then weight distribution stability is improved, but operator freedom of movement deteriorates
Solution Approach 1:
The patent applies the dynamics principle by replacing the rigid fixed connection with a pivotal connection joint that allows rotational movement. The back plate can pivot relative to the hip belt around a vertical axis, enabling the harness to adapt dynamically to the operator's movements while maintaining weight distribution. This dynamic connection resolves the contradiction by providing both stability in weight bearing and freedom in movement.
2Adaptability or versatility
If the shoulder straps are adjusted to accommodate very tall operators, then adaptability to different operator sizes is improved, but harness stability deteriorates
Solution Approach 1:
The pivotal connection joint enables the harness to adapt to different operator sizes and positions dynamically. When shoulder straps are extended for tall operators, the back plate can pivot to maintain optimal positioning relative to the hip belt, preserving harness stability while accommodating the extended strap configuration.
3Adaptability or versatility
If the waist belt is placed lower on the body for short operators, then adaptability to different operator sizes is improved, but comfort and weight distribution performance deteriorate
Solution Approach 1:
The pivotal connection joint allows the back plate to rotate and adjust its position relative to the hip belt. This enables the harness to compensate for the lower waist belt placement on short operators, maintaining optimal weight distribution and comfort by dynamically adjusting the back plate angle to align with the operator's anatomy.
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
The solution provides enhanced ergonomic properties by allowing ±15° pivotal movement, ensuring comfortable and stable weight distribution while allowing greater mobility, reducing operator strain and improving usability in varied environments.
Implementation Method 1
a resilient tab extending through the opening and having a boss adapted to form a pivotal connection joint with a hole formed in the back plate
Data Source
AI summary
A carrier assembly for a harness for carrying a handheld motor-driven work tool, the carrier assembly including a back plate having connections for shoulder straps, a hip belt, and a manner for attaching the work tool. The back plate is arranged to be connected to the hip belt by a pivotal connection joint to allow rotation about an axis substantially perpendicular to a plane defined by the back plate.