1-1 S12-8212010BD SAFETY BELT ASSY - FR SEAT LH 1-2 S12-8212010 SAFETY BELT ASSY-FR LH 2 S12-8212050 LATCH PLATE ASSY-FR SAFTY BELT LH 3-1 S12-8212020BD SAFETY BELT ASSY - FR SEAT RH 3-2 S12-8212020 SAFETY BELT ASSY-FR RH 4 S12-8212070 LATCH PLATE ASSY-FR SAFTY BELT RH 5 S12-8212120 ADJUSTMENT TRACK 6 S12-8212018 COVER 7 S12-8212030 SAFTY BELT ASSY-RR SEAT LH 8 S12-8212090 SAFTY BELT ASSY-RR SEAT MD 9 S12-8212040 SAFTY BELT ASSY-RR SEAT RH 10 S12-8212100 SNAP RING 11 S12-8212043 COVER Body accessory safety belt is a safety device for restraining passengers in collision and avoiding secondary collision between passengers and steering wheel and instrument panel or rushing out of the vehicle in collision, resulting in death and injury. Automobile safety belt, also known as seat belt, is a kind of occupant restraint device. Automobile safety belt is recognized as the cheapest and most effective safety device. In the equipment of vehicles, many countries are forced to equip safety belts. Main structural composition of body accessory safety belt (1) Webbing webbing is a belt with a width of about 50mm and a thickness of about 1.2mm woven from synthetic fibers such as nylon or polyester. According to different purposes, it can achieve the required strength, elongation and other characteristics of the safety belt through weaving methods and heat treatment. It is also part of absorbing the energy of conflict. For the performance of seat belts, national regulations have different requirements. (2) The retractor is a device that adjusts the length of the safety belt according to the sitting posture and body of the passengers, and retracts the webbing when not in use. It is divided into ELR (emergency locking retractor) and ALR (automatic locking retractor). (3) Fixing mechanism the fixing mechanism comprises a buckle, a lock tongue, a fixing pin, a fixing seat, etc. Buckle and latch are devices for fastening and unfastening seat belt. Fixing one end of the webbing on the body is called the fixing plate, the fixing end of the body is called the fixing seat, and the fixing bolt is called the fixing bolt. The position of the shoulder safety belt fixing pin has a great impact on the convenience of wearing the safety belt. Therefore, in order to adapt to passengers of various shapes, the adjustable fixing mechanism is generally selected, which can adjust the position of the shoulder safety belt up and down. Working principle of body accessory safety belt The function of retractor is to store the webbing and lock the webbing pulling out. It is the most complex mechanical part in the safety belt. There is a ratchet mechanism inside the retractor. Under normal circumstances, passengers can pull the webbing freely and evenly on the seat. However, once the continuous pulling process of the webbing from the retractor stops or when the vehicle encounters an emergency, the ratchet mechanism will make a locking action to automatically lock the webbing and prevent the webbing from pulling out. Mounting fixings are lugs, inserts and bolts connected with vehicle body or seat components. Their installation position and firmness directly affect the protection effect of safety belt and the comfort of passengers