strip holes and the keys at least two guiding paper convexes are provided on the bottom of the paper outputting guiding plate 33 the guiding paper convexes fit the paper outputting guiding roller for pressing the outputted paper to output the cut paper smoothly preferably a barb connector is provided on the paper outputting guiding plate 33 the paper outputting guiding plate is connected with the left core unit frame 17 and the right core unit frame 23 via the barb connector a rotated button 24 is provided on the outer of the right core unit frame 23 which is installed on the connecting shaft 30 for adjusting easily in installing process the paper reel frame 64 comprises a left frame and a right frame the left frame is opposite to the right frame frame convexes are provided on the surface of the left frame that is opposite to the right frame the frame convexes are for supporting the paper reel 63 the diameter of the paper shaft of the paper reel 63 is 1 5 inches the diameter of the paper shaft of the paper reel 63 also can be 2 inches or 2 25 inches adapters are respectively connected with the frame convexes provided on the left frame and the right frame when the.