Adjustable Harness Back Plate for Clearing Saw Weight Distribution
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Solution Overview
Problem
Existing harnesses for clearing saws fail to provide even weight distribution and freedom of motion, especially for users of varying sizes and in dynamic environments like dense bushes or forests, due to rigid back plates that do not adjust to body position changes and accommodate different user heights inadequately.
Innovation Solution
A back plate with two adjustable, rotatable portions connected by a joint, allowing for adjustable length and rotation to accommodate various user sizes and movements, combined with adjustable shoulder, side, and waist straps for improved weight distribution and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid back plate is used to support shoulder straps, then structural stability is improved, but freedom of motion and adaptability to different body positions deteriorate
Solution Approach 1:
The back plate is divided into two separate rigid plate portions (upper and lower) that can be connected in different positions. This segmentation allows the harness to adapt to different body positions and user sizes while each portion maintains structural stability when connected.
Solution Approach 2:
The connection between the upper and lower plate portions is made adjustable rather than fixed. The connection position can be dynamically changed to accommodate different user heights and body positions, transforming a static structure into an adaptable one.
2Adaptability or versatility
If the back plate is made adjustable for different user heights, then adaptability is improved, but weight distribution and comfort deteriorate
Solution Approach 1:
By dividing the back plate into upper and lower portions that can be connected at different positions, the harness can be adjusted for different user heights while maintaining proper weight distribution. Each portion retains its structural integrity to support the load appropriately.
Solution Approach 2:
The adjustable connection allows different parts of the back plate to be positioned optimally for each user's body characteristics. The upper and lower portions can be configured to match the specific anatomy and weight distribution requirements of different users.
3Adaptability or versatility
If shoulder straps are adjusted for tall users, then adaptability is improved, but stability and weight distribution deteriorate
Solution Approach 1:
The adjustable connection between upper and lower plate portions allows the harness to be configured for tall users while maintaining stability. The connection position can be raised to accommodate longer spines, and the rigid plate portions maintain structural stability to prevent harness instability.
4Ease of manufacture
If a single rigid back plate is used, then manufacturing simplicity is improved, but freedom of motion and comfort deteriorate
Solution Approach 1:
Dividing the back plate into two portions that can be connected in different positions adds manufacturing steps but enables freedom of motion. The segmented design allows the harness to move and adapt with the user's body while still being manufactured from standard rigid plate components.
Data Source
Figure 1
Figure 2a
Figure 2b
AI summary
A back plate for a harness (1) for carrying a hand-held motor-driven tool such as a clearing saw, the back plate including connections for shoulder straps (6) and further attachment straps, such as a waist belt (8). The back plate (2) comprises two rigid plate portions (4, 5) connectable to each other by means of a connection (3), said plate portions being adjustable in relation to each other to provide for good comfort for a user wearing the harness. Also provided is a harness including the back plate, and a hand-held motor-driven tool including the harness.