Ningbo Joyson Electronic has patented a seat belt pretensioner for vehicles. The device includes a frame, drive wheel, spool, gas generator, and power transmission element to retract the seat belt in response to high acceleration. A ratchet ring prevents seat belt extraction. GlobalData’s report on Ningbo Joyson Electronic gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Ningbo Joyson Electronic, was a key innovation area identified from patents. Ningbo Joyson Electronic's grant share as of February 2024 was 64%. Grant share is based on the ratio of number of grants to total number of patents.
Seat belt pretensioner for vehicle with gas-driven retraction mechanism
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A newly granted patent (Publication Number: US11926280B2) discloses a pretensioner designed for the lap seat belt of a seat belt device in a vehicle. The pretensioner includes a frame, a ball housing, a drive wheel, a rotating spool connected to the drive wheel, a ratchet ring, a spring, and at least one ball-shaped power transmission element. When activated, the gas-driven power transmission element contacts the drive wheel to rotate the spool, retracting the seat belt. The ratchet ring prevents the spool from rotating in a direction that allows extraction of the seat belt webbing, ensuring safety during sudden accelerations.
Furthermore, the patent details additional features such as a ramp in the ball housing for the transmission element to travel in a spiral path, ratchet teeth on the ratchet ring engaging with housing teeth to retract the seat belt, and a seal member preventing gas leakage from the pipe. The design also includes a spring to bias the ratchet ring towards the ball housing, enhancing the effectiveness of the pretensioner. These innovative elements work together to provide a reliable and efficient pretensioner for seat belt devices in vehicles, improving overall safety and protection for passengers in the event of sudden acceleration or impact.
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