Child Seat Base Belt Tension Indicator to Prevent Wobbling
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Solution Overview
Problem
Child safety seats and infant carriers experience wobbling or swinging when installed on vehicle seats using the seat belt, causing discomfort to occupants due to sliding between the base and belt, especially during turns, as existing systems lack effective tension indication and locking mechanisms.
Innovation Solution
A base retaining system with a belt tension indicator featuring a lock-off mechanism comprising a biting compartment, covering plate, holding plate, and colored rotor, which indicates belt tightness through color changes (green for secure and red for loose) to prevent wobbling by ensuring proper belt tension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the base is secured to the vehicle seat using the seat belt, then the installation process is simplified and can be reused, but the base still experiences sliding and wobbling during vehicle turns
Solution Approach 1:
The patent employs a belt tension indicator that provides visual feedback (color-coded signal) to the user about whether the belt is properly tensioned. This feedback mechanism allows users to adjust the belt tension until the correct tension is achieved, as indicated by the visual signal, thereby resolving the contradiction between ease of installation and base stability.
Solution Approach 2:
The patent uses color changes in the belt tension indicator to communicate belt tension status to the user. The indicator displays different colors (e.g., red for insufficient tension, green for proper tension) based on the mechanical state of the belt, enabling users to achieve proper tension without complex measurements or judgment.
2Stability of the object's composition
If a lock-off mechanism is added to prevent belt loosening, then base stability is improved, but the device complexity increases
Solution Approach 1:
The patent combines the locking function and the indication function into a single integrated mechanism. The belt tension indicator is mechanically linked to the locking system, so that proper belt tension automatically triggers both the visual indication and the locking action, eliminating the need for separate complex locking and indication systems.
Solution Approach 2:
The lock-off mechanism is designed to automatically engage when the belt is properly tensioned, as detected by the indicator mechanism. The system self-regulates by using the belt tension itself to trigger the locking action, rather than requiring additional actuators or complex control systems.
3Stability of the object's composition
If the belt tension is increased to prevent sliding, then base stability is improved, but it becomes difficult to determine if the correct tension is achieved
Solution Approach 1:
The patent provides real-time visual feedback through the belt tension indicator that clearly communicates to the user whether the belt tension is sufficient. This feedback eliminates the information gap about tension status by translating the mechanical state into an easily interpretable visual signal.
Solution Approach 2:
The patent uses color changes in the indicator to convey belt tension status information. The color-coded system (e.g., red for loose, green for tight) provides intuitive, immediate information about whether the correct tension has been achieved, eliminating the need for users to interpret complex mechanical states.
Data Source
AI summary
An infant safety seat with an adjustable accommodating space includes a multi-layer cushioning insert which is detachably insertable into an infant safety seat for accommodating an infant in different stages of growth with different sizes. The multi-layer cushioning insert comprises a first cushioning part and a second cushioning part both may detachably to overlap each other and connect into the accommodating space to provide the necessary support for keeping an infant in proper postural position. The first cushioning part includes a U-shaped head cushion part, U-shaped body cushion part and U-shaped leg cushion part for restricting the side moving of the infant. Further, for accommodating a smaller infant, the second cushioning part can be detachably overlapped onto the first cushioning part for further reducing the side moving space and upright moving space of the baby in the infant safety seat.