JPS5826367A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To surely discriminate front and back side by providing a means for front and back side detection for a part of a container containing the magnetic disc, and discriminating the front and back side of a magnetic disc. CONSTITUTION:With a floppy disc cassette 1 loaded at a specified position in making a side A upside, light from a light emitting element 13 reaches a photodetector 14 through an index hole 16 and an output with low level is obtaned, and this output is inverted to a signal of high level at an inverter 17 and inputted to an OR gate 18, where a side A signal is obtained. In this case, since a light emitting element 13a and a photodetector 14a are shut with the cassette 1, no high level signal is obtained from an inverter 17a, allowing to detect the loading taking the side A over surely.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording and reproducing device C1, and more specifically, a magnetic recording and reproducing device configured so that a storage body containing a magnetic disk can be turned over and used is made of cardboard. Inside a storage body made of synthetic resin or the like (a magnetic disk 7 containing a disc-shaped magnetic disk, the storage body is used).

. . Some magnetic disk storage bodies (floppy disk cassettes) can be used with the front and back sides turned over, and in this case, there is of course a mechanism to accommodate the flipping of the magnetic recording/playback device (floppy disk device side). There is.

However, since there was no way to automatically detect the front and back sides of a floppy disk cassette, the operator had to visually check the label displayed on the side of the storage unit (cassette) to determine whether the floppy disk cassette was operated incorrectly. Repetition of crops often occurred. In other words, for example, if a C floppy disk device is installed in a program computer, and the surface (A side) of the magnetic disk (floppy disk sheet) is moved, it is necessary to check which side of the cassette is the surface C2. It was not possible to determine this on the device side.

The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional magnetic disk storage, and it is possible to reliably detect the front and back sides of a magnetic disk storage body, and to notify the operator of information such as incorrect installation. The object of the present invention is to provide a magnetic recording/reproducing device configured as described above.

In order to achieve the above object, the present invention adopts a structure in which a detection means for front/back discrimination is provided on the magnetic disk storage body side, and this is detected by the detection means to discriminate the front/reverse side of the magnetic disk. The present invention will be described in detail below along with two embodiments shown in the drawings, in which the same reference numerals are given to the middle portion of each embodiment.

1 and 2 show an embodiment of the present invention,
The floppy disk cassette (magnetic disk storage body), which is indicated by the reference numeral 1 as a whole in the figure, is made of synthetic resin or the like.It is made of a pair of cassettes (3) and one frame is integrated. A disk-shaped floppy disk sheet (magnetic disk) 2 is accommodated.

A side display section 3 is formed on the front side of the floppy disk cassette 1 in the mounting direction, on which a label or the like indicating that the floppy disk cassette 1 is the A side or the 8th side is attached.

A center hole 4 is formed in the center of the cassette (storage body), and index openings K15 are provided on both sides of the center hole 4.
．． 5 is formed. Further, an opening 6 into which a magnetic head is inserted is formed on the front side (second side) in the mounting direction of the cassette.

By the way, a cutout 7 is formed by cutting off the corner (the second corner) on the front side in the mounting direction of the floppy disk cassette 1, and the other corner on the same side is a flat part 8.

By the way, a switch means 9, exemplified as a microswitch, is fixed on the apparatus main body side facing the cut-off part 7, and an actuator 10 thereof is provided facing the cut-off part 7.

(4) Furthermore, a pair of left and right positioning unit assemblies 11 are provided on the main body side of the apparatus for regulating the forward limit of the floppy disk cassette.

Next, the operation of this embodiment configured as above will be explained.

For example, as shown in FIG. 1, when the floppy disk cassette 1 is installed with side A facing up (2) along the guide of the device main body (not shown), the floppy disk cassette 1 comes into contact with the positioning assembly 11 and stops. In this state, the cutout portion 7 does not come into contact with the actuator 10 even though it is correctly installed. For example, if the detection circuit is configured as shown in FIG.
Since it does not become N and remains open, the power supply voltage of 10 V becomes T.
rL is added to inverter 12', which is inverted and becomes LOW.
A level signal is output, and it is detected that the cassette is loaded with side A facing down.

On the other hand, if it is installed with the back side as the -L side, the flat part 8 will come into contact with the actuator 10 and the microswitch 9 will be turned on, so the TTL inverter 12' (the voltage across the two sides will be L)
The output becomes OW level, the output becomes HIGH level, and it is detected that the device is mounted with the 8th side turned negative. Based on such side signals, a lamp is installed in a part of the device that is visible to the operator to indicate whether or not it has been installed incorrectly, and by lighting or flashing this lamp, it is extremely easy for the operator to identify incorrect installation. I can let you know.

FIG. 3 explains a second embodiment of the present invention, and shows a structure in which a reflector 12 made of aluminum foil or the like is provided on the side A. A light emitting element 13 such as an LED and a light emitting element 14 such as a bottom transistor are provided on the main body side, and when the floppy disk cassette 1 is installed in a predetermined position of the device, the light receiving element 14 receives the reflected light from the reflector 12 of the light emitting element 13. Then, it detects that this is side A.

The reflector 12 is not provided on the 8th surface side, so even if the light from the light emitting element 13 is reflected on the 8th surface, the amount of light reflected back to the light receiving element 14 is extremely small.
The output from the light-receiving element 14 (7) can also be used to easily indicate whether it has been installed incorrectly, and has the same effect as the first embodiment described above. .

FIG. 4 shows a third embodiment of the present invention.
Second, a through hole 15 is formed in a part of the floppy disk cassette 1. A light emitting element 13 and a light receiving element 14 are provided on the main body side of the apparatus to detect when a floppy disk cassette is inserted into a fixed position.

Therefore, when the floppy disk cassette 1 is loaded with side A facing up as shown in FIG. Since the device is exposed, it can be reliably detected that the device is attached with the A side facing up.

When mounted with the 8th side facing upward, the optical path of the light emitting element 13 is blocked, so there is no output from the light receiving element 14, confirming that there is an 8th side. In the case of this embodiment (2), it is possible to use the output of the light receiving element 14 to display a lamp indicating incorrect attachment (8).

FIG. 5 explains a fourth embodiment of the present invention, in which a protrusion 16 is provided on a part of the side A of the floppy disk cassette 1, and this protrusion is provided on the side of the main body of the device. A microswitch 9 is provided with an actuator 10 engaging part 16.

Therefore, when the floppy disk cassette 1 is installed in a predetermined position, the protrusion 16 comes into contact with the actuator 10, and the microswitch 9 is turned on, so that the A side is turned on.
If the actuator 10 is mounted with the 8th side facing ``-'', the microswitch 9
is not turned on, and it is confirmed that there are 8 sides.

Of course, even if the structures shown in FIGS. 4 and 5 are adopted, the same effects as the embodiments shown in FIGS. 1 to 3 can be obtained.

FIG. 6 (- indicates a fifth embodiment of the present invention, in which an index opening 5 and an index hole 16 formed in a floppy diskette 2 are used. In other words, in this embodiment (2), only one opening 5 for the index is provided, and a luminescent line for detecting the index hole 16 through this opening 5 is provided on the main body side of the device. A sensor 13 and a light receiving element 14 are arranged with a cassette in between.

In addition, another set of light emitting elements 13a and light receiving elements 14 is placed in a symmetrical position alongside one set of light emitting elements 13 and light receiving elements 14.
A is provided.

Next, the operation of this embodiment configured as described above will be explained with reference to the circuit diagram of FIG.

The floppy disk cassette 1 is A as shown in FIG.
When the light emitting element 13 is mounted in a predetermined position with its surface facing up, the light beam from the light emitting element 13 passes through the index hole 13 and reaches the light receiving element 14, yielding a LOW level output. OR
Inputted to the gate 18, an index ball detection signal is obtained, and a side A signal is obtained which detects that the ball is mounted with the A side facing upward. At this time, since the light emitting element +3a and the light receiving element +4a are cut off by the fu U-1 disk sumo wrestler, the inverter 17a or 1 is connected to I(
It is detected that the A-side is mounted with the A-side facing upward without any IGH-level begging.

-1,000, if installed with 8 sides closed, -1-
Contrary to the above case, the light emitting element 13 and the light receiving element 14 are cut off, whereas the light emitting element +3a and the light receiving element 14a are electrically connected, so that the inverter 17 outputs HI.
The GH level is set not only by the output but also by the inverter 17a or I.
:) HIGHIy bevel Shinbun is output, which is input to the OR gate 1st and becomes Zide B Shinbun - which detects that it is attached with the 8th side set to -.

It should be noted that each of the following embodiments (1) (-1) shows an embodiment in which a floppy disk cassette is placed in a horizontal position, but the present invention is not limited thereto. However, it can generally be applied to devices that perform magnetic recording and reproduction using a storage body containing a magnetic disk.

(11) 16... Protruding portion 17... Inverter If the storage body is installed not only in a horizontal position but also in a vertical position, the same effect can be obtained in C2.

As is clear from the explanation given in -1- below, according to Akira Kimen, a structure is adopted in which detection means for front/reverse discrimination is provided on the magnetic disk storage side, and this is detected by the detection means using valve I7 to perform front/reverse discrimination. Therefore, it is possible to reliably detect the front and back sides of the magnetic disk//container, and also to notify the operator of incorrect mounting, thereby making it possible to retain the recording medium.

[Brief explanation of the drawing]

Figures 1 and 2 are perspective views and control circuit diagrams illustrating one embodiment of the present invention, and Figures 3 to 6 are different from each other.1)
FIG. 7 is a perspective view showing another embodiment of the present invention, and FIG. 7 is a control circuit diagram of the embodiment shown in FIG. 1... Floppy disk cassette 2... Floppy disk sheet 7... Cut off? lx
B...Flat part 9...Ma, f cross, f Tsuchi 10
...Actuator 11...Positioning part A JJ13
...Light emitting element 14...Light receiving element 15...
・Toukou (12) Patent applicant Tsuyoshi Kato, patent attorney representing Gyanon Electronics Co., Ltd.

Claims (1)

[Scope of Claims] 1) A magnetic recording and reproducing device that uses one magnetic head and can use both sides of the magnetic disk by reversing the magnetic disk, wherein a storage body (a A magnetic recording and reproducing apparatus characterized in that a part thereof is provided with a detection means for front and back discrimination, and this detection means is used as a detection means to detect J-niri to discriminate the front and back sides of a magnetic disk.2) The detection means is a magnetic disk. 2. The magnetic recording and reproducing apparatus according to claim 1, wherein the detection means is a cutout formed at a front corner of the storage body in the mounting direction, and the detection means is a microswitch. 3) The detection means is a reflector provided on one side of the magnetic disk storage body, and the detection means is a light emitting element that irradiates the reflector with light and a light receiving element that detects the reflected light from the reflector. A magnetic recording and reproducing device according to claim 1, characterized in that: 4) The detection means is a through hole formed through -771: of the magnetic disk storage body, and the detection means is a light emitting element placed across the magnetic disk storage body to detect the through hole. 2. The magnetic recording and reproducing device according to claim 1, wherein the magnetic recording and reproducing device is a light receiving element. 5) The magnetic recording and reproducing device according to claim 1, wherein the detection means is a protrusion provided on one side (two protrusions) of the magnetic disk storage body, and the detection means is a microswitch. Apparatus. 6) The detection means is a pair of index balls formed opposite to the 142F of the magnetic recording storage body, and the detection means is configured to detect the index balls. The magnetic recording and reproducing device according to claim 1, characterized in that there are two sets of light emitting elements and light receiving elements, one pair per L block and arranged symmetrically with respect to the center of the magnetic disk storage body. Device.