JPS6341630Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is a reciprocating type having a reproducing function of a magnetic tape in a first direction as well as a reproducing function in a second direction opposite to the first direction. The present invention relates to a tape recorder, and particularly to a display device that displays the running direction of a magnetic tape. Due to its simplicity, a tape recorder installed in a car, called a car stereo, can perform playback operations not only in the first direction but also in a second direction, which is the opposite direction to the first direction. Those configured as follows are generally popular. In such a reciprocating tape recorder, when performing a fast-forward operation, the first direction becomes the fast-forward direction when the playback operation is performed in the first direction, and the second direction becomes the rewind direction. Further, when reproduction is performed in the second direction, the second direction is the fast forward direction, and the first direction is the rewind direction. Therefore, such a tape recorder is required to have a function of displaying in which direction the tape is being played back and in which direction it is being fast-forwarded. The present invention aims to provide an optimal running direction display device for such a reciprocating tape recorder, and will be described in detail below with reference to the illustrated embodiments. In the figure, reference numeral 1 denotes a running direction changeover switch that is switched when the operation is switched between the first direction and the second direction, and its movable terminal 1a
is connected to the power supply via resistor 2. 3 is
This is a first switch which is normally closed and opened when a fast forward operation in the first direction is performed, and one terminal 3a is grounded. Reference numeral 4 denotes a second switch which is normally closed and is opened when a fast forward operation in the second direction is performed, and one terminal 4a is grounded. 5 is a first switching transistor whose base is connected to the power supply via the terminal 3b of the first switch 3 and the resistor 6, and whose collector is connected to the power supply via the resistor 7; It is connected to a fixed terminal 1b which is a first direction terminal of the running direction changeover switch 1 . 8, the base is the second
A second switching transistor is connected to the power supply through the terminal 4b of the switch 4 and the resistor 9, and has a collector connected to the power supply through the resistor 7, and its emitter is connected to the power supply through the resistor 9 . Fixed terminal 1c which is a terminal in two directions
It is connected to the. 10 is a first light emitting diode whose anode is connected to the fixed terminal 1b of the running direction changeover switch 1 and the emitter of the first switching transistor 5; its cathode is connected to the first switch 3 via the diode 11; It is connected to terminal 3b. Reference numeral 12 has an anode connected to the fixed terminal 1c of the running direction changeover switch 1 and the second
A second light emitting diode is connected to the emitter of the switching transistor 8, and its cathode is connected to the terminal 4b of the second switch 4 via the diode 13. 14 is a magnet rotor that rotates as the reel shaft (not shown) rotates; 15 is a reed switch that is turned on and off by the rotation of the magnet rotor 14; one of the open/close terminals is grounded and the other is grounded; It is connected to the cathodes of diodes 16 and 17. Further, the anodes of the diodes 16 and 17 are connected to the first light emitting diode 10 and the second light emitting diode 1, respectively.
Connected to the cathode of 2. The present invention is constructed as described above, and its operation will be explained next. In the regeneration operation state in the first direction, the traveling direction changeover switch 1 is located on the fixed terminal 1b side as shown, and the first switch 3 and the second switch 4 are both in the closed state. In such a state, the first switch 3 and the second switch 4
Since the bases of the switching transistor 5 and the second switching transistor 8 are grounded, the transistors 5 and 8 are in an off state. Therefore, in this state, the resistor 2, running direction changeover switch 1 , first light emitting diode 10,
A current flows through the diode 11 and the first switch 3 , and the first light emitting diode 10 lights up.
Therefore, in such a state, the first light emitting diode 10
is in a lit state, and the second light emitting diode 12 is in an off state, and the user can recognize that the tape recorder is in a playback operation state in the first direction by lighting the first light emitting diode 10. .
If a fast-forward operation in the first direction is performed while the playback operation is being performed in the first direction, the drive mechanism enters the fast-forward state and the first switch 3 is opened. When the first switch 3 is opened, a base current flows to the base of the first switching transistor 5 via the resistor 6, and the first switching transistor 5 is turned on. Therefore, in such a state of fast forwarding in the first direction, a parallel circuit is connected between the collector and emitter of the first switching transistor 5, the resistor 2, and the running direction changeover switch 1 from the power source, and the light emitting diode 10, the diode 16, and the reed switch 15 are connected. A current flows through it. Therefore, in such a state, the first reed switch 15 is turned on and off due to the rotation of the reel shaft.
The light emitting diode 10 is caused to blink. Therefore, in such a state, the first light emitting diode 10 is in a blinking state and the second light emitting diode 12 is in an off state, and the user can move the tape recorder in the first direction by blinking the first light emitting diode 10. It is possible to recognize that the camera is in a fast-forwarding state. The fast-forwarding operation in the first direction is performed as described above, but next, the fast-forwarding operation in the second direction, that is, the rewinding operation will be explained. If a fast forward operation is performed in the second direction while a reproduction operation is being performed in the first direction, the drive mechanism enters the fast forward state in the second direction and the second switch 4 is opened. When the second switch 4 is opened, a base current flows to the base of the second switching transistor 8 via the resistor 9, and the second switching transistor 8 is turned on. As a result, the second
Between the collector and emitter of switching transistor 8, second light emitting diode 12, diode 1
A current flows through the reed switch 7 and the reed switch 15. Therefore, in such a state, the second light emitting diode 12 is caused to blink by the on/off operation of the reed switch 15 as the reel shaft rotates. In addition, in such a state, the first switch 3
Since it is in the closed state, current flows from the power source through the resistor 2, the driving direction changeover switch 1 , the first light emitting diode 10, the diode 11, and the first switch 3 , and the first light emitting diode 10 lights up. Therefore, in such a state, the first light emitting diode 10 is in a lighting state and the second light emitting diode 12 is in a blinking state, and the user can see that the playback direction of the tape recorder is in the first direction due to the lighting of the first light emitting diode 10. Furthermore, by blinking the second light emitting diode 12, it is possible to recognize that fast-forward operation is being performed in the second direction, that is, that the tape recorder is in the rewind operation state in the first direction usage state. As described above, each operation is displayed when the running direction selector switch 1 is in the first direction, which is the fixed terminal 1b side, but when it is in the second direction, which is the fixed terminal 1c side, the above-mentioned operations are reversed. Since the following operations will be performed, a description of these operations will be omitted. In this embodiment, a case has been described in which a light emitting diode is used as the light emitting element, but it is of course possible to use a lamp or the like. Further, although the case has been described in which mechanical switches are used as the traveling direction changeover switch 1 , first switch 3 , and second switch 4, electronic switches can also be used. Furthermore, a reed switch was used as an on/off switch that turned on and off as the reel shaft rotated, but now an electronic switch is turned on and off by the output of an oscillation circuit that oscillates while the reel shaft is rotating. It can also be configured. As explained above, the running direction display device of the present invention can perform playback, fast forwarding and rewinding in the first direction usage state, and By displaying the direction of travel during playback, fast-forwarding, and rewinding operations in two-way usage, the number of display elements can be reduced, making it easier to run reciprocating tape recorders that are miniaturized like car stereos. Ideal as a direction display device.

[Brief explanation of the drawing]

The illustrated circuit is one embodiment of the driving direction display device of the present invention. Explanation of main drawing numbers, 1 ... Traveling direction switch, 3 ... First switch, 4 ... Second switch,
5...first switching transistor, 8...
Second switching transistor, 10...first
Light emitting diode, 12... second light emitting diode,
15...Reed switch.

Claims (1)

[Scope of utility model registration request] In a reciprocating tape recorder capable of performing a playback operation in a first direction and a second direction opposite to the first direction, switching the operation in the first direction and the second direction a running direction changeover switch that is switched accordingly, a first switch that is opened when a fast forward operation is performed in the first direction, and a second switch that is opened when a fast forward operation is performed in the second direction;
A first light emitting element that is turned on by the current supplied through the running direction changeover switch and the first switch during a regeneration operation in a first direction; A second light emitting element is turned on by the current supplied through the second switch, and repeats on/off operations as the reel shaft rotates, and when in the on state, the second light emitting element lights up by the current supplied through the second switch. and an opening/closing switch that allows a drive current to flow through the first light emitting element and the second light emitting element, and in a state where the traveling direction changeover switch is on the first direction side, the opening/closing switch is activated during fast forward operation in the first direction. The first light emitting element is made to blink by supplying a drive current to the first light emitting element through the opening/closing operation of the switch, and the supply of a drive current to the first light emitting element by the first switch during fast forwarding operation in the second direction causes the first light emitting element to blink. The first light emitting element is turned on and the second light emitting element is turned on and off by supplying a drive current to the second light emitting element through the opening/closing operation of the opening/closing switch, and the running direction changeover switch is moved to the second direction side. In a certain state, when the fast forwarding operation is performed in the second direction, the second
The second light emitting element is caused to blink by supplying a drive current to the light emitting element, and the second light emitting element is turned on by supplying a drive current to the second light emitting element by the second switch during fast forward operation in the first direction. A traveling direction display device for a reciprocating tape recorder, characterized in that the first light emitting element is made to blink by supplying a drive current to the first light emitting element by opening and closing the opening/closing switch.