JPS6022763A - Cartridge type tape recorder - Google Patents

Abstract

PURPOSE:To ensure a smooth and stable stopping operation of a tape from a quick traversing mode by turning off the 2nd switching circuit by a time constant circuit with a delay of a fixed time in a stop operation mode and driving a motor at a low speed via a current limiting resistance. CONSTITUTION:When a quick traverse operation is stopped, the Q output of a flip-flop circuit 7 is set at L level. Thus the 1st switching circuit 9 is turned off and the revolution of a motor 14 is quickly stopped. While the 2nd switching circuit 12 is kept on for a period of time decided by a time constant circuit 13. Meanhile a current limited by a resistance 16 flows to the motor 14, and the motor keeps its revolutions at a low speed for a fixed period of time and is stopped. Therefore the tape driving is not stopped suddenly but stopped after driving at a low speed for a little while. Thus the tape is never drawn between a reel and a tape guide.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cartridge type tape recorder, and in particular, is designed to prevent the tape from sagging when the tape is stopped from fast-forwarding.

As shown in FIG. 1, in a tape car or cartridge in which tape 2 is stored in a cartridge case 1 in an endless manner, the tape 2 is
In some cases, the image is fast-forwarded at a speed of about 0 times.

However, when fast forwarding is performed at such a high speed and then suddenly stopped, the pinch roller 3 and capstan 4 will stop immediately, but! Due to the inertial force of the I-/L 15 and the slack of the tape 2, the tape 2 is pulled into the gap between the reel 6 and the tape guide 6 and stopped, and then when the tape 2 is fast-forwarded again at high speed, the tape 2 is pulled in. The tape 2 is often bent and damaged by being pulled suddenly.

The present invention eliminates these conventional drawbacks, and one embodiment thereof will be described below with reference to FIG. 2.

Reference numeral 7 is a flip and freon 1 circuit, which controls a first switching circuit 9 consisting of a tape switch 9b, and a diode 10. A second switching circuit 12 made up of transistors 12a and 12b is controlled via a resistor 11. Furthermore, this second switching circuit 12 has a capacitor 13a.
The operation is controlled by a time constant circuit 13 consisting of a resistor 13b and a resistor 13b. Reference numeral 14 denotes a motor for running the tape, and the motor 14 is connected in series with the first switching circuit 9 between a power supply 15 and ground, and a resistor 16 and a resistor 16 are connected in parallel with the first switching circuit 9. 2
A series circuit of switching circuits 12 is connected.

With the above configuration, if a fast forward operation is now performed, the Q output of the flip-flop circuit 7 will go to the H level, which will turn on the first switching circuit 9, start the motor 14, and turn on the capnut button. By rotating at high speed, the tape is fast-forwarded at high speed.

On the other hand, the H level of the flip-flop circuit 7 charges the capacitor 13a of the time constant circuit 13 via the diode 10, and turns on the second switching circuit 12 via the resistor 11.

Then, when a stop operation is performed to stop the fast-forward operation, the Q output of the flip-flop circuit 7 becomes L level, thereby turning off the first switching circuit 9 and causing the motor 14 to rapidly rotate. is about to be stopped, but the second switching circuit 12
The on state continues for the time determined by , and during this time motor 1
A current limited by a resistor 16 flows through the motor 1
4 maintains a low speed rotation state for a certain period of time and then stops.

Therefore, the tape runs rapidly even if the stop operation is performed:
(The tape is not stopped, but is moved to low speed running for a short time and then stopped, so that the tape will not be drawn between the reel and the tape guide.)

It goes without saying that the time constant circuit 13 and the resistor 16 are set to values that will allow the tape to stop smoothly and safely.

The present invention has a simple structure as described above, and is capable of smoothly and stably stopping the tape when it is stopped from high-speed fast forwarding, and has great practicality.

[Brief explanation of drawings]

FIG. 1 is a schematic internal view of a tape cartridge, and FIG. 2 is a circuit diagram of an embodiment of the present invention. 7...Flip-flop circuit, 9...
First switching circuit, 12... Second switching circuit, 13... Time constant circuit, 14...
...Motor, 1θ...Resistance. Name of agent: Patent attorney Toshio Nakao and 1 other person-A
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Claims (1)

[Claims] a first switching circuit for controlling a tape running motor; a series circuit including a current limiting resistor connected in parallel with the first switching circuit; and a second switching circuit; It is equipped with a time constant circuit for controlling the operation, and when the tape is fast-forwarded, the first. Second
The second switching circuit is turned on, and both switching circuits are turned off when the stop operation is performed, and during the stop operation, the second switching circuit is turned off after being delayed for a certain period of time by the time constant circuit, and during this time the motor is connected to the current limiting resistor. A cartridge type tape recorder configured to be rotated at low speed through a cartridge.