Backpack Strap Height Adjustment Mechanism
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Solution Overview
Problem
Conventional backpacks lack adjustable shoulder strap height, leading to unstable wear and discomfort due to fixed strap positions, causing fatigue and inconvenience, especially during long periods or activities like mountain climbing, as they do not accommodate varying user sizes or load distributions.
Innovation Solution
A strap height adjustment apparatus comprising a locking and non-locking strap adjuster, an adjusting strap, and a shoulder strap, allowing the shoulder strap attachment point to be adjustably positioned between these adjusters, enabling the height of the shoulder strap to be adjusted, thereby optimizing the backpack's position on the user's body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the shoulder strap attachment point is fixed on the backpack, then the backpack structure is simple and easy to manufacture, but the backpack cannot accommodate different user sizes and load distributions, leading to unstable wear and discomfort
Solution Approach 1:
The patent applies the dynamics principle by transforming the fixed strap attachment point into a movable one. The adjusting strap with locking and non-locking adjusters enables the attachment point to dynamically reposition vertically along the backpack body, allowing adaptation to different user sizes and load distributions while maintaining structural integrity
Solution Approach 2:
The patent segments the strap adjustment function into distinct components: a locking strap adjuster for securing the adjusting strap at selected positions, a non-locking strap adjuster for allowing movement, and the adjusting strap itself. This segmentation enables independent control of adjustment and locking functions, resolving the contradiction between adaptability and complexity
2Adaptability or versatility
If the shoulder strap length is made adjustable by connecting lower ends to straps sewn to the lower end of the back surface, then the strap can adapt to different users, but the upper ends must be fixed to the upper end of the back surface, limiting adjustment freedom
Solution Approach 1:
The patent enables dynamic adjustment of the upper strap attachment point by introducing a movable adjusting strap with locking and non-locking adjusters. This allows the attachment point to be repositioned vertically along the backpack body, providing freedom of adjustment while maintaining secure fixation at selected positions
Solution Approach 2:
The adjusting strap acts as an intermediary element between the fixed backpack structure and the movable shoulder strap attachment point. The locking and non-locking adjusters serve as intermediaries that control the relationship between the adjusting strap and the backpack body, enabling easy adjustment while ensuring secure positioning
3Reliability
If the backpack is worn for a long period of time or during mountain climbing, then the backpack provides stability and support, but the fixed strap position causes fatigue and inconvenience due to unstable wear
Solution Approach 1:
The patent resolves this contradiction by enabling dynamic adjustment of the strap attachment point to optimize the backpack's position on the user's body. The locking and non-locking adjusters allow users to reposition the straps to accommodate different body sizes and load distributions, ensuring stable and comfortable wear during extended periods or activities like mountain climbing
Data Source
AI summary
A strap height adjustment apparatus including a backpack, a locking strap adjuster, a non-locking strap adjuster, an adjusting strap, and a shoulder strap. The locking strap adjuster is secured to the backpack at a first attachment point. The non-locking strap adjuster secured to the backpack at a second attachment point. The adjusting strap is configured to be carried by the locking strap adjuster and the non-locking strap adjuster. The shoulder strap is secured to the adjusting strap at a shoulder strap attachment point.