In the technical solution, the elastomer connected to the front of the handle hand plate tensioner button is simple, easy and fast to control the locking keys on both sides of the handle button and the bayonet latch on both sides of the eccentric button body. Engagement separation to achieve mutual engagement of the eccentric button body and the handle. And at the same time, the sliding shaft is movably connected in the bar-shaped waist hole, and the sliding shaft can slide along the bar-shaped waist hole. When the strap is connected to the eccentric buckle, the strap can be adjusted up and down, easy to install, and the strap can be easily tightened. The strap and the eccentric buckle are tighter than the conventional eccentric buckle.

Of course, the above is only a typical example of the present invention. In addition, the tensioner GB of the present invention may have other specific embodiments and any technical solution formed by equivalent substitution or equivalent transformation falls within the scope of the claims of the present invention.