SAFETY TENSIONING DEVICE FOR AUTOMOBILES

A safety tensioning device includes a base (1), a handle (2), a winding mechanism and a first bundling strap (3). The first bundling strap (3) is disposed on the main rotating shaft (5) and the winding mechanism. The winding mechanism includes a box (101), a coil spring component (7) and a winding shaft (8) passing through the box (101) with two ends exposed out of the box (101). One end of the winding shaft (8) is attached to the coil spring component (7), a centrifugal self-locking mechanism (9) to stop the winding shaft (8) winding when a rotation speed is too fast, is attached to another end of the winding shaft.