A pre-tensioned safety belt

Abstract

The invention provides a pretensioner seat belt, which comprises a power device, an electronic control unit, a tightening device and a seat belt, wherein the power device comprises a mandrel component; the seat belt is connected with the tightening device; the electronic control unit is connected with a retractor control device; the tightening device also comprises a rapid locking mechanism, and the rapid locking mechanism comprises a locking block, a connecting rod, a crank connecting rod and a long-arm torsion spring; the connecting rod penetrates through the mandrel component to be assembled together with the crank connecting rod; a transmission wheel is assembled with the crank connecting rod in a matched way; the locking block is arranged in a cavity of the mandrel component; the long-arm torsion spring is fixed together with the locking block and assembled with the mandrel component after being assembled with the connecting rod. According to the pretensioner seat belt, injury to a user is effectively prevented from being aggravated during the sliding-out of the locking block, and the working reliability of the automobile seat belt and the safety of a passenger are effectively ensured; in case of collision of an automobile, the locking block can be rapidly ejected to limit a woven belt of the seat belt, and injury to the passenger is prevented from being aggravated by inertia; the pretensioner seat belt has the advantages of rapid locking function, simple structure, safety and reliability.

Description

technical field [0001] The invention belongs to the field of automobile safety devices, and mainly relates to a pre-tightened safety belt. Background technique [0002] Existing automotive pre-tightened force-limiting seat belts in the event of a collision, such as figure 1 As shown, the ignition command is issued by the ECU, and the gas generated by the explosion of the generator 3 pushes the pre-tightening glue stick 8 in the steel pipe 2 to move to achieve pre-tightening. After the pre-tightening is completed, the locking block 10 in the mandrel assembly 5 is required to be locked at the first time. Currently The traditional design is to use the acceleration (acceleration greater than 2.0g) when the seat belt webbing 1 is pulled out to make the inertia pawl contact with the inner teeth of the case (frame 11) to lead out the locking block 10 or because the acceleration (deceleration) of the vehicle body is greater than 0.45 g Topple the pendulum and open the pawl to achie...

AI Technical Summary

Problems solved by technology

[0002] Existing automotive pre-tightened force-limiting seat belts in the event of a collision, such as figure 1 As shown, the ignition command is issued by the ECU, and the gas generated by the explosion of the generator 3 pushes the pre-tightening glue stick 8 in the steel pipe 2 to move to achieve pre-tightening. After the pre-tightening is completed, the locking block 10 in the mandrel assembly 5 is required to be locked at the first time. Currently The traditional design is to use the acceleration (acceleration greater than 2.0g) of pulling out the seat belt webbing 1 to make the inertia pawl contact with the inner teeth of the case (frame 11) to lead out the locking block 10 or because the acceleration (deceleration) of the vehicle body is greater than 0.45 g Make the pendulum fall to open the pawl to achieve locking. All the above locking needs the locking block 10 to slide from the initial position to the locking position, and the consistency of each locking time is poor (the fluctuation range is 3~5ms)

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