Backpack Shoulder Strap Attachment to Back Part
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Solution Overview
Problem
Backpacks with net elements experience undesirable deformation when loaded, leading to impaired ventilation and discomfort due to the tensile load exerted by shoulder straps, which are typically fastened to the upper edge of the net element.
Innovation Solution
The shoulder straps are designed to cross an intermediate space and be fastened to the back part of the backpack, avoiding tensile load on the net element, and reinforced with plate elements and a frame arrangement to maintain stability and flexibility, ensuring no deformation and improved ventilation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the shoulder straps are fastened to the upper edge of the net element, then the backpack structure is simple, but the net element deforms under tensile load when the backpack is loaded
Solution Approach 1:
The invention extracts the shoulder strap attachment function from the net element and relocates it to the back part. The shoulder straps are now fastened to the back part instead of the net element, separating the load-bearing function from the ventilation function. This resolves the contradiction by maintaining structural simplicity while preventing net element deformation.
Solution Approach 2:
The back part serves as an intermediary structure between the shoulder straps and the net element. By fastening the shoulder straps to the back part, the load is transferred through this intermediary rather than directly to the net element, preventing deformation while maintaining the net element's ventilation function.
2Ease of operation
If the net element is tensioned by the frame arrangement to provide ventilation space, then air can enter the user's back for pleasant ventilation, but deformation of the net element impairs this ventilation function
Solution Approach 1:
The invention separates the ventilation function from the load-bearing function. The net element is dedicated solely to providing ventilation space by being tensioned against the user's back, while the shoulder straps are extracted from this function and attached to the back part instead. This ensures the net element maintains its shape and ventilation effectiveness without suffering from tensile deformation.
3Ease of operation
If the shoulder straps are spaced apart from the convergence area of the net element and back part, then carrying comfort and ventilation are improved, but the attachment point stability may be compromised
Solution Approach 1:
The invention segments the backpack into distinct functional zones: the net element convergence area maintains structural integrity for attachment, while the shoulder straps are positioned in a separate zone that provides comfort and ventilation. This segmentation allows each area to optimize its specific function without compromising the other.
Data Source
AI summary
The invention relates to a backpack (10) having a stowage space (18), which on its side facing the back of a user of the backpack is delimited by a back part (20). The backpack (10) includes a net element (12) and a frame arrangement (22), which for tensioning the net element (12) is designed in such a way that an intermediate space (24) is formed between the back part (20) and the net element (12) when the net element (12) is tensioned. The backpack (10) has two shoulder straps (14, 16) for carrying the backpack (10) on the user's back. The shoulder straps (14, 16) have end areas (42, 44) that cross the intermediate space (24) and are fastened to the back part (20).