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kuai technology reported on october 4 that great wall motors officially released a statement on the "tank 300 seat belt break" incident reported online.it was confirmed that the accident vehicle was modified and a third-party transfer mortise lock was added. the seat belt breakage incident was indeed caused by modification, not a product quality issue.

the principle analysis is as follows:

first, at the moment of the accident, the seat belt retractor was pre-tensioned and detonated, and the third-party transfer lock was pulled violently and disengaged. at this time, the force was as high as 1.8kn or more. this greatly reduces the restraint of the occupants by the seat belt system, which in turn causes the occupants to move abnormally.

second, the pretensioned end piece was then pretensioned and detonated. after the installed third-party transfer latch was disengaged, the seat belt system was in a free and relaxed state. the small lock at the connection between the pre-tightening end piece at the lower end of the b-pillar and the seat belt is in a free state. it is affected by the dual effects of the pre-tightening force of the pre-tightening end piece and the abnormal forward movement and dive force of the occupant, causing an abnormality with the lower trim panel of the b-pillar. impact damage. excessive acceleration causes the small lock head to deform, weakening the mechanism to prevent inertial dissociation, and eventually disengagement occurs.

great wall motors stated that when the seat belt is worn correctly, it can closely fit the waist and shoulders of the occupants. during the detonation preloading process, the shoulder and waist webbing will be tightened, effectively reducing the amount of inertial dive of the occupants, thereby playing an important role in protecting the occupants.

as a key safety accessory, seat belts must not be modified without permission and must be worn correctly.. if later users have doubts about this issue, we are willing to work with the user to entrust a third-party appraisal agency to conduct appraisal.

the following is the full text of the official description: