Multi-stage transmission tensioning device for automobile safety

A multi-stage transmission tensioning device for automobile safety, comprising a base group (1) having a base and a handle group (2) having a handle;

• wherein the base group (1) and the handle group (2) are connected through a multi-stage transmission group (3);
• the multi-stage transmission group (3) comprises a transmission shaft (25) for pivoting both with the base of the base group (1) and the handle of the handle group (2), a main rotating shaft (28) fixed on the base and used for winding a long strap (31), and a transmission wheel fixed on the transmission shaft (25);
• the transmission wheel realizes a rotation state required for binding, a non-rotation state required for locking, and a free state required for unlocking under the action of the base group (1) and the handle group (2);
• a handle of the handle group (2) is composed two handle side plates (13) combined together by a handle fixing plate (19) and a handle fixing shaft (18), the two handle side plates (13) is provided with corresponding mounting holes for receiving the transmission shaft (25) and an active pawl (14);
• three pins are extended from the rear portion of the active pawl (14), and the handle fixing plate (19) is provided with three through holes for three pins of the active pawl (14) to pass through, the ends of the two side pins are respectively connected with a puller (15), and the middle pin is sleeved with an active pawl spring (17) and the end of the middle pin passes through the corresponding through hole.