Motorized Backpack Strap Adjustment System
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Solution Overview
Problem
Manual adjustment of backpack straps in VR/AR systems is cumbersome and difficult, leading to discomfort and improper positioning of loads, especially in shared use scenarios where precise ergonomic alignment is required.
Innovation Solution
Integration of a distance sensor, actuator, angle sensor, and angle adjuster in the backpack to automatically adjust the strap length and load angle, ensuring precise positioning and spacing without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual adjustment of backpack straps is used, then the device complexity is reduced, but the ease of operation deteriorates and adjustment time increases
Solution Approach 1:
The patent replaces manual mechanical strap adjustment with an automated motorized tensioning system. Motors are integrated into the backpack structure to automatically adjust strap length and load positioning based on sensor feedback, eliminating the need for manual operation while improving ease of use.
Solution Approach 2:
The backpack system performs self-adjustment through integrated sensors that detect wearer body dimensions and automatically control motors to position straps and load optimally. The system serves itself by autonomously making adjustments without requiring user intervention, thereby improving operational ease.
2Productivity
If manual adjustment of backpack straps is used, then the device complexity is reduced, but the productivity deteriorates due to increased adjustment time
Solution Approach 1:
The system performs preliminary measurement of wearer body dimensions using sensors before adjustment. This preliminary data collection enables the motorized system to pre-calculate optimal strap positions and load placement, allowing for rapid automated adjustment that increases productivity while managing complexity through systematic preprocessing.
Solution Approach 2:
The patent implements a feedback control system where sensors continuously monitor strap tension and load position, and motor controllers adjust the mechanical components based on this feedback to achieve precise ergonomic positioning. This closed-loop control enables fast and accurate adjustments, significantly improving productivity.
3Adaptability or versatility
If fixed backpack design is used, then the manufacturing precision is simplified, but the adaptability deteriorates for different wearers
Solution Approach 1:
The patent transforms the static backpack design into a dynamic system with motorized components that can actively adjust strap length, tension, and load position. This dynamic capability allows the same backpack to adapt to different wearer body types and preferences, significantly improving versatility while maintaining precise positioning through controlled motor actuation.
Solution Approach 2:
The system changes physical parameters such as strap length, tension force, and load angle based on sensor measurements of wearer characteristics. By dynamically adjusting these parameters, the backpack achieves high adaptability to different wearers while maintaining manufacturing precision through controlled parameter modification rather than requiring precision in the base design.
4Ease of operation
If automated adjustment system is integrated, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The patent integrates multiple functions into unified components: sensors serve both measurement and control functions, motors perform both positioning and tensioning tasks, and the control system manages both strap adjustment and load positioning. This multi-functionality reduces the number of separate components needed, thereby improving ease of operation while managing overall system complexity.
Data Source
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AI summary
Example implementations relate to adjustable backpacks. In some examples, a backpack may comprise a spindle coupled to a set of straps and a load, a distance sensor, an actuator coupled to the spindle, an angle sensor, and an angle adjuster coupled to the load. The actuator may actuate in response to a first signal from the distance sensor to adjust a length of the set of straps. The angle adjuster may activate in response to a second signal from the angle sensor.