Fluid damper for adjusting seat belt retention force

By designing a fluid damper, the overlap of the pipes is adjusted by the deflection of the inner cylinder, automatically adapting to passenger mass and collision speed. This solves the problem that the seat belt system cannot adapt to, achieving uniform holding force adjustment and improved safety.

CN115614421BActive Publication Date: 2026-07-24STABILUS GMBH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
STABILUS GMBH
Filing Date
2022-07-11
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing seat belt systems are not effective at accommodating passenger weight and collision speed, which may result in passengers being subjected to inappropriate holding forces during a collision, potentially leading to injury.

Method used

Design a fluid damper including an outer cylinder and an inner cylinder. The inner cylinder is filled with damping fluid. A piston can move in the inner space. The front and rear fluid chambers and the reservoir are connected by pipes. The deflection of the inner cylinder adjusts the overlap of the pipes, automatically adapts to passenger mass and collision speed, and adjusts the holding force.

Benefits of technology

It achieves automatic adjustment of seat belt holding force based on passenger weight and collision speed, ensuring that passengers are subjected to uniform load during a collision, reducing the risk of injury, and has a simple structure and low cost.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a fluid damper for adjusting a seat belt holding force. The fluid damper comprises an outer cylinder and an inner cylinder arranged in the outer cylinder. The inner cylinder encloses an inner space. The fluid damper comprises a piston which is movable in the inner space along a longitudinal axis of the cylinder. The fluid damper comprises a duct. The duct electrically conducts a front fluid chamber for damping fluid arranged along the longitudinal axis in front of the piston to a rear fluid chamber arranged along the longitudinal axis behind the piston and / or to a reservoir for damping fluid. The duct comprises an outer duct portion in a housing wall of the outer cylinder and an inner duct portion in a housing wall of the inner cylinder. The inner cylinder is deflectable from a rest position relative to the outer cylinder by a force acting on the piston along the longitudinal axis, whereby the deflection of the inner cylinder causes an adjustment of an overlap of the outer duct portion and the inner duct portion depending on the magnitude of the force.
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