f direction fig9 through the first gear assembly 130 simultaneously the second gear assembly 140 is rotated in the e direction fig9 so that the r ring gear member 112 is rotated in the g direction fig9 through the second gear assembly 140 as a result the tape guide post units 115 and 114 are shifted as shown in fig6 so as to pull out the magnetic tape from the tape cassette and later described torsion coil springs 135 and 145 see fig1 b and 12c are twisted so as to fix the tape guide post units 115 and 114 to their respective final positions thus the magnetic tape is loaded wound over an angular range of approximately 220 u00b0 around the rotary drum unit 104 rotating the intermittent gear member 152 causes the pinch roller mechanism 107 to operate so that a pinch roller 107 a presses the magnetic tape against a capstan 107 b thereby pinching the magnetic tape the magnetic tape is driven pinched and held by the pinch roller 107 a and the capstan 107 b so as to run back and forth along the rotary drum unit 104 so that information may be recorded on the magnetic tape next a description will be given of the gear mechanism 120 0039 fig1 a through 10c are a top plan view a front view and a bottom plan view respectively of the gear mechanism 120 fig1 is an enlarged version of fig1 c fig1 a is a perspective view of the gear member 121 fig1 b is an exploded perspective view of the first gear assembly 130 and fig1 c is.