JPS59178650A - Floppy disc device - Google Patents

Abstract

PURPOSE:To set a disc easily and surely by providing photoelectric converting means in two places and discriminating the front or rear face of a disc on a basis of detection outputs of their window hole positions and switching the rotation direction of the disc and magnetic heads in accordance with this discrimination result. CONSTITUTION:If the set direction of a floppy disc 11 is not correct, the transmitted light or the reflected light from the disc is not made incident to detecting parts 21 and 22, and the error of insertion direction is displayed on a display device 30. If the set direction is correct and the front face is set, a photoelectric conversion signal is outputted from only the detecting part 21, and a motor 26 is rotated forward, and a magnetic head 28 is brought into contact with the disc 11 to record and reproduce information on the front face. If the set direction is correct and the rear face is set, the photoelectric conversion signal is outputted from only the detecting part 22, and the motor 26 is rotated backward, and a magnetic head 29 is brought into contact with the rear face to record and reproduce information correctly. If no signals are outputted from both detecting parts 21 and 22, a fault is displayed on the display device 30. Thus, the disc is set easily and surely.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to a floppy disk device used as an auxiliary storage device of a computer.

(b) Technology background: A P-disk device is a device in which a disk coated with a magnetic material is set in a drive means and rotated, and a magnetic head is applied to the disk to write and read programs and data. is housed in a jacket to protect it from dust and scratches, forming a floppy disc.

(1'i Prior Art and Problems) Figure 1 shows such a conventional floppy disk.This disk 2, which serves as a magnetic medium as shown in Figure 1(a), has an index hole 1, and this disk. It consists of a jacket 3 as shown in FIG. A radially long insertion hole 5 and a drive shaft insertion hole 6 are bored.Note that 7 is a display section for displaying the recorded contents of the jacket 3 and a call.

By the way, since the jacket 3 of such a floppy disk is approximately square, when it is inserted into a floppy disk device to write or read data, it may be inserted in the wrong direction. Therefore, the position of the index hole detection window 4 is detected by the photoelectric conversion means in the device, and only when the desired photoelectric conversion output is obtained, the rotation of the disk 2 and the contact of the magnetic head are started. It is possible to write and read data using the .

However, when inserting a floppy disk, it is easy to insert the floppy disk with the front side and the back side wrong, and in this case, the conventional floppy disk device operates only when it is inserted correctly, causing the problem that it must be reinserted.

The present invention has been made in view of the above-mentioned problems in the prior art. Photoelectric conversion means are provided at two locations, and based on the detection output of the window hole position, it is determined whether the disk is front or back. It is an object of the present invention to provide a floppy disk device which switches the rotational direction of the disk and the magnetic head based on the determination result, thereby facilitating and ensuring the insertion of a disk into the floppy disk device.

5) Structure of the Invention And to achieve this object, the present invention provides disk front and back detection means for photoelectrically detecting the position of a window hole provided on the floppy disk side, and -1- a motor for driving the disk, and a rotational direction of the motor and a motor for driving the disk; The device is configured to include a control means for controlling the operation.

(F) Embodiments of the Invention Below, embodiments of the invention will be specifically described with reference to the drawings.

FIG. 2 shows the floppy disk 11 used in the present invention, and 12, 13 and 14, 15 respectively indicate the window holes 4 of the floppy disk 11 when the floppy disk 11 is set in the floppy disk device.
(Assuming that FIG. 2 shows the normal set state, the drive shaft will be at a point symmetrical position with respect to the center of the drive shaft insertion hole 6 when it is turned over.

This is a light emitting element that illuminates the window hole 4'' (shown as a dotted line), and a light receiving element that receives the light that has passed through the window hole 4.4 degrees.
- Construct an example.

FIG. 3 is a block connection diagram of a floppy disk device that drives this floppy disk 11 to write and read data. In the same figure, 21.22
1 is a detection unit serving as a front/back detection means for detecting the front and back sides of the Fronby disk 11, and converts the light transmitted through the window hole 4 or the light reflected onto the disk surface through the window hole 4 into a photoelectric conversion element. 14.15, and detects the position of the window hole 4, that is, the front or back surface of the Frembie disk 11, by the current output corresponding to the amount of received light. 23 calculates the calculation output data shown in the following table based on the outputs of the detection units 21 and 22. 24 calculates the front and back judgment circuit 2
A motor controller connected to 3 outputs a signal to rotate the disk drive motor forward or reverse. 25 is a motor drive circuit, and 26 is a motor connected to the morph drive circuit W325. Further, 27 is a head switching unit connected to the front/back determining circuit 23, and 28 and 29 are magnetic heads connected to this head switching unit 27, which are arranged on both sides of the disk. 30 is floppy disk 11
This is an indicator that indicates that the device has been inserted incorrectly or that the device is abnormal.

Next, the operation of the floppy disk device having the above configuration will be explained with reference to the above table.

First, if the floppy disk 11 set in the floppy disk device is placed on the back or front side and the setting direction is incorrect, the transmitted light or reflected light from the disk will not reach either of the detection units 21 and 22, which are light receiving elements. Since it does not enter, the front/back determining circuit 23 displays on the display 30 that the insertion direction of the floppy disk 1 is incorrect, and gives an instruction to reinsert the floppy disk 11.

Next, when the floppy disk 11 is inserted into the floppy disk device in the correct direction and the floppy disk 11 is the front side at this time, a photoelectric conversion signal of a predetermined level is output from the detector 21 to the front/back determination circuit 23. Based on this output, the motor controller 24 controls the motor 26 to rotate in the normal direction, and the magnetic navel 2B is brought into contact with the front side of the disk. Therefore, data must be written to or read from the front side of the disk.

Conversely, even if the floppy disk 11 is set in the correct direction, if the floppy disk 11 is on the back side, a photoelectric conversion signal is output only from the detection section 22, and based on this output, the motor controller 24 outputs a photoelectric conversion signal. The motor 26 is reversely controlled, and another magnetic hem 1'29 is brought into contact with Y4 on the back side of the disk.

Therefore, data is written to or read from the front side of the disk. In other words, the motor 2G is rotated in the normal direction.

By reversing it, you can store, write, and read data in the correct direction on the disk.

In addition, when the floppy disk 11 is transferred to a floppy disk device, the rain detection section 21.22
When a photoelectric conversion signal -J- of a predetermined level is received from 1 to 1, it can be considered that 1117 is due to the device or rotation fl'3.
Display based on the output of ÷! :S30, prompting, for example, to check the device.

In this way, the error in the setting direction of the floppy disk 11 is corrected, and the driving direction of the motor 2G and the magnetic heads 2B and 29 to be used are switched according to the front and back sides of the floppy disk that is set in the correct direction. You can write or read data on either the front or back side of the disc.
This can be done reliably and quickly without replacing the floppy disk 11.

(G) Effects of the Invention As explained in detail above, the floppy disk device of the present invention can facilitate and ensure the floppy disk centing, and can operate normally even if the floppy disk is installed in either direction. This provides advantages such as being able to perform efficient write and read operations.

[Brief explanation of the drawing]

Figure 1 (al is a front view of the disk body of the floppy disk, Figure 1 fbl is a front view of the jacket, Figure 2 is a perspective view of the floppy disk used in this invention,
FIG. 3 is a block connection diagram of the floppy disk device of the present invention. 11... Floppy disk, 4... Window hole, 21.
22...Disc front and back detection means, 23°24.27
...Control means, 2G...Drive motor, 28.29
...magnetic head.

Claims (1)

[Claims] Disk front/back detection means for photoelectrically detecting the position of a window hole provided on the floppy disk side, separate magnetic fields that are attached to and separated from the back and front surfaces of the disk, and a motor for driving the disk. and a control means for switching the rotational direction of the motor and the operation of the respective magnetic throats with respect to the disk based on the output of the front/back detection means.