Reel, end cap, seat belt retractor and seat belt assembly

Abstract

The invention provides a coiling shaft which is applied to a coiling device of a safety belt. The coiling shaft comprises a core shaft which is provided with a through hole along a central axis and is used for winding a braiding belt, and two end covers which are separately and respectively arranged at two ends of the core shaft; the end covers are respectively in a flat cylinder shape; outer teeth which are matched with tooth shapes of inner teeth on the side wall of a frame of the coiling device are uniformly arranged along the periphery of each end cover and the center of the end cover, facing the inner end face of the core shaft, is provided with a central concave hole with inner teeth; the tooth shapes of the inner teeth of the central concave hole are matched with the tooth shapes of outer teeth at one end part of a torsion bar; and inner teeth which are matched with the outer teeth of the middle part of the torsion bar are arranged at the middle section position of a through hole at the central axis of the core shaft. The coiling shaft can contain the torsion bar with a shorter length so that the torsion bar is not easy to bend and deform; and the whole stress condition is simplified and is safer and more stable. The invention further provides the end cover for the coiling shaft, a safety belt coiling device using the coiling shaft and a safety belt assembly using the coiling shaft.

Description

technical field [0001] The invention relates to safety belt technology, in particular to a reel for a safety belt retractor. The invention also relates to an end cap for the reel, a seat belt retractor using the reel and a seat belt assembly. Background technique [0002] Seat belts are important passive safety components used in automobiles. When the vehicle collides, the seat belt can protect the user from or reduce secondary injuries during the collision. [0003] The standard three-point safety belt originally designed for use in car seats only includes a locking mechanism and webbing for securing the user (human body). When the vehicle collides, the locking mechanism is locked, and the webbing is no longer stretched outward, thereby binding the user to the car seat. However, due to the rapid change of speed at the moment of collision, the momentum change time caused by the speed change during collision is very short, so that the force of the webbing acting on the use...

AI Technical Summary

Problems solved by technology

[0011] The present invention provides a retractor reel for seat belts to solve the above-mentioned problems of existing seat belt retractors

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