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

Source: United States Patent and Trademark Office (USPTO). Credit: Ningbo Joyson Electronic Corp

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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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.