Driving safety responsibility: Yongsheng spiral springs supply driving safety
　　
News sources: spiral springs | constant force spring, Yongsheng springs
  
Though the spiral springs is small, but with tremendous applications,it is widely used in automotive safety field.

The emergence of prestressing force type car seat belt is an automotive safety application with spiral springs. The car seat belts is an essential part of the car, its function is when the car speeding or hit,car seat belt tightens in time, to guarantee the safety of the people inside the car. When the car is moving normally, the seat belt can timely relax, do not make the person feels oppressing sensation. But the traditional springs can't solve this problem.

Spiral springs as one of the springs, it is widely uesd in car safety belt nowadays. Spiral springs are made of stainless steel belt rolled by a specific machine,the center of the spring is connected with the power shaft. When the external force make the shaft relatively rotating with spring, the spring rolls on the power shaft and stored kinetic energy,when the external force disappears, the spring produces torsion to drive the power shaft, then the stored kinetic energy can be output.

Comparing with the same type specifications, the prestressing force power spring can store the torsion of 25% to 40% more than others,they can provide more rotation number under the same space. As we all know,when normal driving,the safety belt only plays a weaker spring tension, it will not make the passengers have too much pressure. Once in the event of emergency, such as collision belt can lock up immediately, the passenger will be firmly fixed on the seat. When a car collision or having an emergency brake, it will produce a great inertia force, then makes drivers, passengers have a second collisions with the car's steering wheel, windshield, backrest objects, etc.
it is easy to cause serious damage to the passengers, or even make them quit seats or be thrown out of the car. The seat belt can make driver and passenger ride on the seat, in case of secondary collision. And its cushion can absorb a large number of kinetic energy, and reduce the damage to the driver and passengers.
   
The car has entered thousands of families, the driving safety become issues which people are widely care about. A good seat belt not only needs a good effect of prestressing force, but also a high quality springs, to avoid the spring being broken during the emergency.

Yongsheng precision spring firstly to use spiral springs five times rolling technology,the performance of precision spring  is 120% of the average springs,with a longer lifetime.