JPS6145477A - Display device for the volume of information - Google Patents

Abstract

PURPOSE:To set up the position of a display member at the writing of information by forming the display member for displaying the volume of information recorded on a recording medium and its recording margine on a holding body such as a cassette for holding the recording medium. CONSTITUTION:A magnetic disc 2 is stored in a jacket 1 and a display device 10 for displaying the volume of information is formed in the jacket 1. A display window 3 is formed on the display device 10 and numerals such as 0-10 are scaled on one side of the display window 3. The display member 4 colored black and the ground 5 colored white are formed in the display window 3 and the numeral corresponding to the border between the white and black is read out to detect the volume of information. For instance, unrecording status of 4/10 is displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a total amount display device for displaying the amount of information recorded on a recording medium.

Conventionally, for example, with tape cassettes for audio or VTR, it was possible to know the tape position by comparing the outer circumference of the tape roll wound around the winding shaft with the scale provided on the cassette. It was not possible to know the amount of information recorded within. Furthermore, floppy magnetic disks used for external storage in electronic computers are even equipped with such means.
do not have.

For this reason, just by looking at the cassette (for magnetic tape) or jacket (for magnetic disk) from the outside, it is difficult to tell how much information has been recorded on the recording medium, or how much room there is left to record. I couldn't easily check to see if it was still there. In other words, to confirm the amount of information mentioned above, you can either drive the recording medium from beginning to end and read out all of the information, or write the amount of information on the surface of the cassette or jacket and read it to determine the amount of information. I had to. For this reason, the above-mentioned confirmation often takes time and lacks accuracy.

The information amount display device of the present invention eliminates the above-mentioned drawbacks, and allows the amount of information recorded on the recording medium or the recording space to be displayed on the holder (cassette, jacket, card, etc.) that holds the recording medium. A display member is provided for display. The position of the display member can be set when writing information to the recording medium.

Hereinafter, the present invention will be explained in detail using figures.

FIG. 1 shows an example in which the present invention is applied to a jacket used in a floppy disk device. In FIG. 1, a magnetic disk 2 (part of which is exposed at the center hole) is housed in a jacket 1. As shown in FIG. The jacket 1 is provided with a display device 10 for displaying the amount of information. The display device 10 has a display window 3, and numbers from O to 10, for example, are scaled on one side of the display window. A display member 4 colored black and a base 5 colored white can be seen in the 0 display window 3. The amount of information can be determined by reading the numbers corresponding to the boundaries between black and white as described above. For example, in FIG. 1, 4/10 represents unrecorded data.

FIG. 2 shows a case where the jacket 1 shown in FIG. 1 is loaded into a magnetic recording device. In addition, FIG. 2 shows the case where the jacket 1 is cut along the dashed line 8 shown in FIG. 1 and then viewed from the direction of the arrow 9. The jacket 1 is inserted into a groove 12 provided in a guide 11 in a jacket loading section of the device, and loaded in a fixed position. A display device 10 is provided above the jacket 1 that houses and holds the magnetic disk 2, and is provided with a display member 4 and a moving member 6 for moving the display member 4. When the movable member 6 is moved along the groove 7 shown in FIG. 1, the display member 4 is also moved.

The moving member 6 is fitted with a driving member 13, and the driving member 13 is fixed to a belt 14 that is moved by rotation of a pulse motor 15. Therefore, the positions of the moving member 6 and the display member 4 (that is, the display position of the amount of recorded information) can be determined by signals input to the terminal 16 of the pulse motor 15.

FIG. 3 shows an electric circuit for controlling the pulse motor 15 etc. shown in FIG. 2.

In Figure 3, in the conventional floppy disk device, C
PU (computing unit) 18, FDC (floppy disk system M
l) x9, DRU (works as an interface - <drive unit) 20. It consists of a magnetic head 21 and a drive motor 22 (used for rotating the magnetic disk 2 and moving the magnetic head 21). In this embodiment, a controller 23 and a pulse motor 15 are newly provided, and while a write signal is input to the magnetic head 21, the pulse motor 15 is driven by the controller 23, and the belt 14 shown in FIG.
The moving member 6 is moved in the direction of the arrow 17 via the driving member 13. As a result, the information recorded on the m% disc 2 can be displayed on the display member 4.

The above explanation uses a floppy disk as an example, but V
It can be applied to tape cassettes for TR or audio, magnetic cards, etc., and the amount of recorded information or recording room can be displayed by rotating the display member like the hands of a clock. good.

[Brief explanation of drawings]

FIG. 1 is a plan view of a magnetic disk jacket having an embodiment of the information display device of the present invention, FIG. 2 is a cross-sectional view showing the mechanism of the main part of a floppy disk device using the jacket shown in FIG. The figure is a block diagram showing the main configuration of the electric circuit of the second illustrated floppy disk device. 1--1-jacket 2-111 magnetic disk 3
-----Display window 4-1---Display member 6---
- Moving member 10-----Display device 13----
Drive member 14----Belt 15----Pulse motor 23----Controller 21----One magnetic head

Claims (1)

[Claims] a display member that is movably provided on a part of a holder that holds a recording medium for recording information and displays the amount of information recorded on the recording medium or recording room; and a moving member that moves the display member. An information amount display device comprising: