Device for detecting the position of a tape in a magnetic tape recording and/or reproducing apparatus

A device for detecting the position of a magnetic tape in a recording/reproducing apparatus including drawing out means for drawing the tape out from a tape cassette, the tape having a layer of magnetic material on a side facing outwardly from said cassette, said device comprising:

• means for transporting said tape within said cassette during a fast forward or rewind mode, said tape being drawn outside said cassette by the drawing out means during operation in either a recording or reproducing mode;
• tape guide pole means for making contact with a side of said tape which is opposite the side having the magnetic layer thereon, said tape guide pole means entering into the tape cassette when it is placed in an operational position, and for making contact with said opposite side of the tape;
• tension arm means having said tape guide pole means thereon, said tension arm means being located at a first position where the tape guide pole means contacts the tape within the cassette during the fast forward or rewind mode and moving to a second position so that the tape guide pole means contacts the tape drawn out from the cassette during the recording or reproducing mode, said tape guide pole means acting as a tension pole when the tension arm means is at said second position;
• and
• detection heads embedded in a side of said tape guide pole means for making contact with said opposite side of said tape for detecting a tape position designating signal recorded on said magnetic layer, and said detection head being operative during said fast forward, rewind, recording and reproducing modes, said tape guide pole means having an inclined top guide part for guiding and directing said magnetic tape to make contact with the detection head when said cassette is placed in the operating position of said recording reproducing apparatus.