Drive unit clamping and fixing piece applied to pre-tightening safety device and pre-tightening safety device

Abstract

The invention discloses a drive unit clamping and fixing piece applied to a pre-tightening safety device. The drive unit clamping and fixing piece comprises a retractor frame and a pre-tightening pipe. A through hole is formed in the portion, corresponding to the outlet end of a drive unit, of the wall of the pre-tightening pipe. The drive unit clamping and fixing piece also comprises a clamping and fixing piece body, a chuck arranged on the clamping and fixing piece body and a chuck neck connected with the clamping and fixing piece body and the chuck. The extension size of the clamping and fixing piece body in one spatial dimension is larger than the extension sizes in the other two spatial dimensions. The two ends of the clamping and fixing piece body are provided with structures which are fixedly assembled on the retractor frame. The chuck neck extends outwards from one side of the clamping and fixing piece body. The chuck is arranged at the end, far away from the clamping and fixing piece body, of the chuck neck and is formed by being bent towards one side of the clamping and fixing piece body through the chuck neck. The invention further provides the pre-tightening safety device. By the adoption of the drive unit clamping and fixing piece, the blocking efficiency can be improved, and the utilization rate of the drive unit is higher.

Description

technical field [0001] The present application relates to the technical field of pre-tightening safety belts, and in particular relates to a drive unit fastener for a pre-tightening safety device. The present application also provides a pre-tightening safety device. Background technique [0002] The pre-tensioned seat belt is a commonly used seat belt device, which improves passenger safety by restraining the displacement of the seat belt wearer caused by the rapid acceleration generated during a collision. Such seat belts usually have a seat belt retractor. [0003] The pre-tensioned seat belt retractor has a part called a pre-tensioned tube. When the seat belt device is required to perform a restraint action, the seat belt is wound by force to tighten the seat belt, thereby improving the safety of the occupants. binding. [0004] The pre-tensioning device in the prior art, such as a Chinese patent document with the patent number CN200710096607.4 discloses a pre-tensionin...

AI Technical Summary

Problems solved by technology

[0006] In the technical solution disclosed in the above-mentioned Chinese patent document, the retractor is driven to rotate by the elastic force of the ball, the safety belt is tightened, and the ball located behind the ball stop unit can be stopped from ejecting outward through the ball stop unit; however, the above-mentioned Chinese The pre-tightening device of the patent document, the ball stop unit can only play a blocking role after a certain number of balls are discharged, so that the remaining balls stop being discharged, and the balls before the ball stop unit cannot be blocked;

[0007] Thus, two situations may occur, one is that the ball stop unit has stopped the discharge of the ball row when the binding force exerted by the balls is not enough, and the other is when the balls have applied enough thrust to the reel to pre-load the reel. When the tightening process has been completed, the ball row before the ball stop unit has not been drained, resulting in wasted redundant ball row and can lead to other unstable situations

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