Tensioner with retractable handle

A tensioner with retractable handle, comprising:

• a sheet metal base, provided with a centre shaft installed in a middle of the sheet metal base;
• a sheet metal handle, comprising a tightening part and a handle, wherein a bottom of the tightening part is rotatably connected to the middle of the sheet metal base through the centre shaft, and a top of the tightening part is fixedly connected to a bottom of the handle;
• an upper baffle, wherein both side ends of the upper baffle are slidably connected to both sides of an upper part of the tightening part, and a bottom of the upper baffle is symmetrically connected with two downward lower tongue parts;
• a lower baffle, wherein both sides of the lower baffle are slidably connected to both sides of a rear end of the sheet metal base;
• a lower connecting plate, wherein a bottom of the lower connecting plate is rotatably connected to the both sides of the rear end of the sheet metal base, and the lower connecting plate is interlocked with the lower baffle;
• and
• a spring retaining plate, wherein a bottom of the spring retaining plate is rotatably connected to both sides of a front end of the sheet metal base;
• wherein a second hole is provided in a rear of the lower baffle, a top front of the lower connecting plate is connected to a front standing plate matching with the second hole, and a top rear of the lower connecting plate is connected to an upper tongue part.