Shoulder Strap Chest System With Anti-Slip Hook And Slot
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Solution Overview
Problem
Existing shoulder strap chest systems for packs suffer from slipping ladders that are not available for free attachment and can slip on the shoulder pad straps, causing user inconvenience.
Innovation Solution
A shoulder strap chest system featuring slots on the shoulder pads with hooks that have a curved end, clip lock, and wide ladder passage, allowing for detachable and adjustable attachment of connection straps to prevent sliding, eliminating the need for a middle fastener.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If slipping ladders are used for attachment, then the structure is simple, but the attachment is not secure and can slip on the strap
Solution Approach 1:
The attachment system is segmented into distinct functional components: slots embedded in the shoulder pad straps, hooks with specific geometric features (curved end, clip lock, wide ladder passage), and connection straps. This segmentation allows each component to perform its specific function optimally - slots provide fixed attachment points, hooks provide secure engagement with anti-slip features, and connection straps provide adjustability.
Solution Approach 2:
The hook design incorporates local quality variations with different sections having specific functions: the curved end provides smooth engagement, the clip lock provides secure locking, and the wide ladder passage prevents slipping. The slot width is specifically designed to match the hook dimensions to prevent lateral movement while allowing vertical adjustment.
2Adaptability or versatility
If middle fastener is used for length adjustment, then the adjustment mechanism is provided, but the system becomes more complex and requires additional components
Solution Approach 1:
The hook serves multiple functions: it provides the attachment point, enables length adjustment through its geometric design, and prevents slipping. The wide ladder passage allows the connection strap to be threaded and adjusted to different lengths, eliminating the need for a separate middle fastener component while maintaining full adjustability functionality.
Solution Approach 2:
The adjustment function is extracted from a separate middle fastener component and integrated into the hook design itself. The hook's geometric features (wide ladder passage, curved end) inherently provide the adjustment capability, removing the need for additional adjustment mechanisms and simplifying the overall system.
3Reliability
If slots and hooks with matching width are used, then sliding is prevented, but the attachment point becomes fixed rather than freely movable
Solution Approach 1:
The system provides dynamic adjustability within static constraints. The connection strap can be freely moved vertically along the shoulder pad to select different attachment heights (dynamic), but once attached to a slot, the matching width of the hook and slot prevents lateral slipping (static constraint). This allows users to optimize comfort by choosing different positions while ensuring secure attachment at the selected position.
Data Source
AI summary
A shoulder strap chest system for a pack including at least one shoulder pad, includes: at least one slot on the shoulder pad, at least one hook hooked at the slot detachably, and at least one connection strap, at least one end of which is attached to the hook in a length-adjustable way, wherein the width of the hook matches that of the slot so that the hook is prevented from sliding when the hook is hooked at the slot.