| 摘要 |
<p>S01091 MODE CHANGING APPARATUS IN A TAPE RECORDER In a tape recorder of the type having a first or drive gear rotatable with the capstan by a motor, a second or driven gear rotated by the drive gear when in meshing engagement therewith and having a toothless portion to permit rotation of the drive gear independently of the second gear when the latter is disposed in a rest position with its toothless portion facing the first gear, an actuator in the form of a cam rotatable with the second gear and engaging a lever by which, for example, a head carriage is moved to its operative position for establishing the playback mode of the tape recorder in response to turning of the second gear, and a latching assembly normally holding the second gear in its rest position and being actuable, for example, for selection of the playback mode, to permit angular displacement of the second gear from its rest position into meshing engagement with the first or drive gear so as to be driven by the latter in a substantially complete revolution whereupon the latching assembly again holds the second gear substantially in its rest position; a drive circuit is selectively operative to drive the motor at to different speeds, and a drive control circuit is operable simultaneously with actuation of the latching assembly to changeover the drive circuit from driving the motor at the higher of the two speeds to driving the motor at the other or slower of the two speeds which, for example, is standard for the playback mode. When the stop mode of the tape recorder is again selected, the drive control circuit again causes the motor to be driven at the higher speed.</p> |
