tape under a constant pressure in a play mode and separate them in a stop mode application_number US 26799588 A description a tape tension mechanism embodying the invention is described below in detail referring to the drawings fig1 shows an inventive tape tension mechanism in a tape player including a rotary head it should be noted however that the rotary head and a cassette are omitted from the drawings in fig1 reference numeral 1 designates a mode cam gear including a slot cam 2 and a position regulating pin 3 and movable between different positions corresponding to respective tape modes when the mode cam gear 1 is positioned in a play position shown in fig1 its position regulating pin 3 positionally regulates a regulated arm 5 lower right arm in the drawings of a tension control member 4 to position it at a lower position in the drawing when the mode cam gear 1 is positioned in stop and fast winding modes shown in fig2 it does not engage the tension control member 4 the mode cam gear 1 is configured so that its slot cam 2 for example controls a reel brake the tension control member 4 is pivotably supported by a pivot 4a when the regulated arm 5 is urged by the position regulating pin 3 of the mode cam gear 1 as shown in fig1 the tension control member 4 is pivoted in the clockwise direction to its non control position and when disengaged from the position regulating pin 3 of the mode cam gear 1 as shown in fig2 the tension.