Adjustable Backpack Shoulder Strap Mounting to Prevent Deformation
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Solution Overview
Problem
Conventional backpacks with fixed straps are not suitable for all users due to varying skeletal structures, leading to shoulder fatigue and potential health issues, and existing adjustable straps suffer from displacement and deformation, complicating installation and reducing service life.
Innovation Solution
A multifunctional backpack with adjustable shoulder straps featuring sheet bodies and hook buckles, allowing for easy adjustment to fit different shoulder widths, with a hook buckle connector inserted into an insertion hole to secure the strap, and a bottom plate restricting the sheet bodies in a clamp slot to prevent deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed straps are used in conventional backpacks, then the structure is simple and easy to manufacture, but the backpack is not suitable for all users with different shoulder widths, causing shoulder fatigue and health issues
Solution Approach 1:
The strap connection system is segmented into multiple adjustable positions with holes at different locations on the backpack body, allowing the strap to be configured for different shoulder widths. This segmentation enables adaptability without requiring a completely complex adjustable mechanism.
Solution Approach 2:
The strap connection system transitions from a fixed static structure to a dynamic adjustable structure where the strap can be repositioned at multiple hole locations. This allows the backpack to adapt to different users while maintaining structural simplicity through a straightforward adjustment mechanism.
2Object-affected harmful factors
If force is concentrated on the shoulders in conventional backpacks, then the backpack structure is simple, but the shoulders are prone to fatigue and this affects user physical health
Solution Approach 1:
The force distribution is extended from a single-point shoulder connection to a multi-point distribution system involving the backpack body, waist belt, and multiple strap attachment points. This dimensional expansion of the support structure distributes weight more effectively across the body, reducing shoulder fatigue.
3Strength
If holes and locks are directly connected point-to-point in reinforced backpacks, then the connection is simple, but the contact area between shoulder straps and backpack body is reduced, increasing pressure and causing deformation
Solution Approach 1:
The connection structure uses a clamp slot with specific geometric features (rounded corners, optimized dimensions) to increase the local contact area between the strap and backpack body. This localized quality improvement distributes pressure more evenly and prevents deformation while maintaining connection strength.
4Ease of operation
If locks are opened to connect or remove shoulder straps in reinforced backpacks, then the connection structure is simple, but the installation and removal of shoulder straps are inconvenient and inefficient
Solution Approach 1:
The lock mechanism is extracted and replaced with a simple hole-and-strap insertion system. The strap passes through selected holes and is secured without requiring locks to be opened or closed. This extraction of the locking function simplifies the operation while maintaining adequate connection reliability through the clamp slot design.
Data Source
AI summary
A multifunctional backpack with adjustable shoulder strap is provided, which includes a backpack body and a shoulder strap. A lower of the shoulder strap is connected to the backpack body, and there are two or more sheet bodies extending along a transverse direction of the backpack body on an upper of the backpack body. Two sides of the sheet bodies are connected to the backpack body, and an insertion hole is formed between middles of the sheet bodies and the backpack body. A hook buckle is connected to an upper of the shoulder strap; the hook buckle includes a hook buckle main body and a hook buckle connector. One end of the shoulder strap is connected to the hook buckle main body, and a bottom of the hook buckle main body and a bottom of the hook buckle connector are connected by a bottom plate.