JPS59119570A - Floppy disk device - Google Patents

Abstract

PURPOSE:To prolong the life of a device and the life of a medium by detecting the medium being inserted and driving a spindle motor, and detecting the completion of the insertion of the medium from the stabilization of an index period to a specific interval and stopping the spindle motor. CONSTITUTION:When the medium is inserted into the device, a medium sensor A detects that and generates a medium sensor output 1, and a latch circuit D receives it and generates an output 5. An AND gate E receives this latch circuit output 5 and medium sensor output 1 generates an output 6, which operates a control circuit G through an OR gate F to start the spindle motor M. When the medium is set around a spindle at this time, an index sensor B generates an index sensor output 2. This is received by a checking circuit C, which generates a checking circuit output 4 when the interval is constant. Then, the output 4 is received to reset the latch circuit output 5, and the control circuit G stops the spindle motor M through the AND gate E and OR gate F.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a floppy disk device, and more particularly to a floppy disk device for writing and reading binary information on and from a floppy disk as a medium.

In conventional floppy disk drives, in order to correctly and quickly load a medium, it is necessary to keep the spindle motor rotating during loading.

However, since there was no means to detect that a medium was loaded, it was necessary to keep the spindle motor constantly rotating in order to always set the medium correctly, which significantly shortened the life of the device.

If the controller does not output an appropriate motor start/stop signal, the spindle motor will not rotate even when a medium is loaded, and the medium will not be properly loaded, causing damage to the medium and significantly shortening the life of the medium.

That is, the conventional 70 tsupee disk device.

This method has the drawback of shortening the life of the device as well as the life of the medium.

SUMMARY OF THE INVENTION An object of the present invention is to provide a 70-tsupee disk device that can improve the life of the device and the life of the media.

That is, the purpose of the present invention is to detect that a medium has been inserted and start the spindle motor, to detect that the insertion of the medium has been completed when the index period becomes one step apart, and after the detection, to start the spindle motor. By making it possible to stop the spindle motor and also to rotate the spindle motor by an external signal from an external signal line when required by the controller, the spindle can be automatically rotated when a medium is loaded, thereby solving the above drawback. The purpose is to provide a floppy disk device.

A 70-twee disk device of the present invention includes a medium sensor that detects insertion of a medium and generates a medium sensor output, an index sensor that detects an index of the medium and generates an index sensor output, and an index sensor that detects an index of the medium and generates an index sensor output. A check circuit that generates a check circuit output after confirming that the output is supplied at specified intervals; and a latch circuit that is set by the medium sensor output and reset by the check circuit output to generate a latch circuit output.

The spindle motor is configured to include a start/stop circuit for starting/stopping the spindle motor based on the latch circuit output and an external signal for controlling rotation of the spindle motor.

That is, the floppy disk device of the present invention includes a floppy disk IUfull system in which the rotation of a spindle motor can be controlled by an external signal, a medium sensor that detects insertion of a medium, and an index that detects an index. A sensor, a check circuit that verifies that the index is coming at a specified interval, and a set/receiver that receives the output of this check circuit and the output of the medium sensor.
The spindle motor is configured to include a latch circuit that performs resetting, and a start/stop circuit that receives the output of the latch circuit and the external signal and starts and stops the spindle motor.

Next, five embodiments of the present invention will be described with reference to the five drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

In the 70-tip disk device shown in FIG.
It is connected to one input of ND gate E. Index sensor output 2, which is the output of index sensor B that detects the index, is input to check circuit C, and check circuit output 4, which is the output thereof, is connected to the reset terminal of the latch circuit. The latch circuit output 5, which is the output of the latch circuit, is connected to the other terminal of the AND gate E, and the AND circuit output 6, which is the output of the AND gate E, is connected to the other terminal of the AND gate E.
connected to one terminal of the Signal input terminal HJ: The input external signal 3 is connected to the other terminal of OR gate Fp. The output of the OR circuit Cuff is connected to the control input of a control circuit G of the spindle motor M, and this control circuit G is connected to the spindle motor.

Note that the AND gate E, the OR gate F, and the control circuit G constitute a start/stop circuit.

A specific example in which light is used for index sensor B and medium sensor A is shown in FIG.

The function of the above-mentioned configuration to achieve the above purpose will be explained using the time chart shown in FIG. 3.

Now, when the medium (1) is inserted into the floppy disk device, the medium sensor A detects it and outputs High as the medium sensor output 1, and the latch circuit that receives this sets the latch circuit output 5. AND gate E which receives this latch circuit output 5 and medium sensor output 1 sets AND gate output 6.

The control circuit G for controlling the spindle motor M is actuated via the OR gate F to start the spindle motor M.

Here, when the medium I is set on the spindle, the index sensor B outputs an index sensor output 2. Check circuit C receives this and outputs check circuit output 4 if the interval is constant.

This check circuit output 4 resets the latch circuit output 5, and the control circuit G acts to stop the spindle motor M via the AND gate E and 6R gate F.

External signal 3, which is input to external signal input terminal H, is O.
It is connected to the other terminal of the R gate F, and the spindle motor can also be rotated by this.

The floppy disk device of the present invention is improved by adding a check circuit! 7. The spindle motor can be started when the medium is inserted and stopped when rotating at a constant speed.
This has the effect of not only improving the lifespan of the device but also improving the lifespan of the medium.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a schematic diagram illustrating the relationship between the medium sensor and index sensor shown in FIG. 1, and the medium, and FIG. 3 is similar to FIG. 1. 2 is a time chart for explaining the operation of the embodiment shown in FIG. A...Medium sensor, B...Index sensor, C...Check circuit, D...
・Latch circuit, E...AND gate, F...
...OR gate, G...control circuit, M...
...Spindle motor, H...Signal input terminal, ■...Medium, 1...Medium sensor output, 2...Index sensor output, 3. ...
...External signal, 4...Check circuit output, 5.
...Latch circuit output, 6...AND circuit output, 7...OR circuit output. Agent Patent Attorney Uchihara -

Claims (1)

[Claims] a medium sensor that detects insertion of a medium and generates a medium sensor output; an index sensor that detects an index of the medium and generates an index sensor output; and the index sensor output is supplied at regular intervals. a latch circuit that is set by the medium sensor output and reset by the check circuit output to generate a latch circuit output; and a latch circuit that generates a latch circuit output by confirming that the medium sensor output 1. A floppy disk drive comprising: a start/stop circuit for starting/stopping the spindle motor according to an external signal for controlling the spindle motor.