Seat Belt Retractor Sensing Suppression for Noise-Free Locking
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Solution Overview
Problem
Existing safety belt retractors generate disturbing noise during normal vehicle operation due to the frequent collisions of movable parts in vehicle sensing devices, which affects the occupant's driving experience and is costly to manufacture and assemble.
Innovation Solution
A safety belt retractor with an adaptive vehicle sensing suppression device that includes a driven part and a suppression part, where the suppression part is held by an adhesive force on the driven part, allowing it to slide and engage/disengage with a retainer to lock the adaptivity of the vehicle sensing function, ensuring the function remains unchanged with seat back angle adjustments and functions sensitively in emergencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vehicle sensing device with movable parts is provided to detect acceleration and trigger locking, then the safety function is improved, but noise is generated during normal driving due to frequent collisions of movable parts
Solution Approach 1:
The patent extracts the sensing ball from the steel ball seat during normal driving operation. By using a retaining member that can move between a retaining position (holding the sensing ball in place to prevent collisions and noise) and a non-retaining position (allowing the sensing ball to move freely for emergency detection), the harmful noise-generating collisions are eliminated while preserving the sensing function when needed
Solution Approach 2:
The patent implements a dynamic control mechanism where the retaining member can dynamically switch between retaining and non-retaining states. This dynamic adjustment allows the system to adapt to different operating conditions: during normal driving, the sensing ball is retained to prevent noise; during emergency situations, the retaining member moves to allow the sensing ball to trigger the locking function
2Adaptability or versatility
If an adaptive vehicle sensing assembly is provided to maintain sensing direction during seat back adjustment, then the adaptability is improved, but the structure complexity increases
Solution Approach 1:
The patent merges the adaptive sensing assembly with the existing vehicle sensing device structure. The adaptive sensing assembly is integrated into the locking device housing, sharing common components and spatial arrangement. This merging approach provides the adaptive sensing function (maintaining sensing direction during seat back adjustment) while avoiding the need for completely separate additional components, thus reducing overall structural complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively suppresses noise during normal driving, maintains the vehicle sensing function's sensitivity and adaptivity, and simplifies the structure and manufacturing process, reducing costs while ensuring reliable operation in emergency situations.
Implementation Method 1
the suppression part is held by an adhesive force on the driven part
Data Source
AI summary
The present invention relates to a safety belt retractor, including a bracket, a spool, a locking device, a vehicle sensing device with an adaptive vehicle sensing function and a vehicle sensing adaptivity suppression device. The vehicle sensing adaptivity suppression device includes a driven part (8) and a suppression part (7) that can be held on the driven part by an adhesive force. The driven part has a sliding track, and the suppression part has a sliding portion which can slide on the sliding track against the adhesive force. The suppression part has a retainer, and a sensing seat has a counter retainer that cooperates with the retainer. A retaining connection isn't formed when the suppression part is in the first end position, and is formed when the suppression part leaves away from the first end position to a predetermined extent. Here, the mechanism for achieving the vehicle sensing adaptivity suppression function is simple in structure and low in cost, and can effectively suppress the adaptivity of the vehicle sensing function. The present invention further relates to a safety belt assembly comprising such a safety belt assembly.