JPH0216461Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disk jacket, and particularly to a disk jacket having an easy and reliable chucking structure.

When recording and reproducing data using a so-called floppy disk, which is a circular magnetic sheet housed in a flat, envelope-shaped jacket, the magnetic sheet must be rotated within the jacket. Therefore, openings were formed at the top and bottom of the jacket, and a chuck mechanism consisting of a pair of upper and lower parts was inserted into each of the pair of openings, and the almost central part of the magnetic sheet was clamped and driven from above and below. Therefore, the chuck mechanism becomes complicated, and in particular, since the upper part of the chuck mechanism is lowered from above, there is a problem in that the degree of freedom in mounting the jacket is reduced.

The present invention has been developed in view of these problems, and includes a jacket in which a disk-shaped recording medium having a center hole is rotatably housed therein, and a jacket consisting of a pair of upper and lower halves; A head insertion opening provided in at least one of the halves, a drive means insertion hole provided in the lower half into which a drive means for driving the disk-shaped recording medium is inserted, and an inner surface of the upper half. a ring-shaped rib provided at a position corresponding to the driving means insertion hole; a gap provided between a lower end of the ring-shaped rib and the disc-shaped recording medium; A chuck ring comprising a gap for rotating the disc-shaped recording medium while floating in the gap when the medium is rotated, and a chuck ring made of a magnetic material disposed in the ring-shaped rib so as to be movable up and down, a chuck ring that is magnetically attracted to a magnet provided on the upper part of the driving means and grips the disc-shaped recording medium between the chuck ring and the upper part of the driving means; an engaging part provided on the chuck ring; and the ring. a regulating portion provided at the lower end of the shaped rib and engaging with the engaging portion of the chuck ring to restrict downward movement of the chuck ring; The positioning portion provided on the upper part of the driving means is inserted into the center hole of the disk-shaped recording medium, and the chuck ring is magnetically attracted by the magnet to cause the chuck ring and the driving means to be connected to each other. According to a disk jacket, the disk jacket is configured to grip the disk-shaped recording medium from above and below by an upper portion thereof, and rotate the disk-shaped recording medium with the disk-shaped recording medium floating in the gap. It is something.

An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a floppy disk according to an embodiment of this invention includes a circular magnetic sheet 1 which is a disk-shaped recording medium. magnetic sheet 1
A positioning hole 2 is formed in the center of the sheet 1, and an engagement hole 3 is formed at a position eccentric to the center of the sheet 1. The magnetic sheet 1 is rotatably housed in a flat jacket 6 formed by joining a pair of upper and lower halves 4 and 5. Ribs 7 are formed on the peripheral edges of the upper and lower halves 4 and 5, respectively (see Figure 2), and these ribs 7 form a certain gap between the upper and lower halves 4 and 5. . Further, an opening 8 which is an insertion hole for inserting a driving spindle is formed in the center of the lower half 5, and an opening 9 for inserting a head extending radially with respect to this opening 8 is formed.

A pad insertion opening 10 is formed in the upper half 4 of the jacket 6 in correspondence with the opening 9, and a ring-shaped rib is provided at a position corresponding to the opening 8 on the lower surface of the jacket 6, as shown in FIG. A cylindrical portion 11 consisting of the following is integrally arranged. A ring-shaped locking piece 12 that protrudes inward is connected to the lower end of this cylindrical portion 11. And this cylindrical part 11
A chuck ring 13 made of a magnetic material such as magnetic stainless steel is housed inside the chuck ring 13 so as to be movable up and down, and when the flange portion 14 of this ring 13 engages with the locking piece 12, the ring 13 is moved downward. The movement of the ring 13 is restricted, and the ring 13
1 so that it does not fall out. Also, between the upper half 4 and the magnetic sheet 1 and between the magnetic sheet 1 and the lower half 5, liners 15 and 16 made of, for example, a nonwoven fabric impregnated with a lubricant are arranged, respectively. A notch 17 is formed in the liner 15 that corresponds to the opening 10 in the upper half 4, and a notch 18 is formed in the liner 16 to correspond to the opening 9 in the lower half 5, respectively, to prevent insertion of the pad and the magnetic head. It seems like there is no such thing.

Next, let's talk about the drive mechanism on the device main body side.
As shown in FIG. 3, a spindle 21 serving as a driving means is fixed to the output shaft 19 of the motor 20, and a positioning pin 22 is protruded from the center of the upper part of the spindle 21. Further, a ring-shaped permanent magnet 23 is fixed to the upper surface of the spindle 21. Further, a drive pin 24 is provided eccentrically with respect to the center of the spindle 21, and is urged upward by a spring 25 built into the spindle 21.

Therefore, when the magnetic sheet 1 is attached to the main body of the apparatus while being housed in the jacket 6, the spindle 21 is inserted into the jacket 6 through the spindle insertion opening 8 of the jacket 6, as shown in FIG. The positioning pin 22 engages with the positioning hole 2 formed in the center of the magnetic sheet 1, and the magnetic sheet 1 is positioned. Furthermore, the permanent magnet 23 magnetically attracts the chuck ring 13 and holds the magnetic sheet 1 in the axial direction of the spindle 21. Furthermore, the drive pin 2 on the spindle 21 side
4 engages with the engagement hole 3 of the magnetic sheet 1. Therefore, the rotational force of the motor 20 is transmitted to the magnetic sheet 1 via the pin 24. Moreover, at this time, the magnetic sheet 1 is positioned by the positioning pin 22, and is held by the permanent magnet 23 and the chuck ring 13 in the vertical direction, so that the lower end of the cylindrical portion 11 and the magnetic sheet 1 are held in the vertical direction. It will be rotated smoothly while suspended in the gap formed between them. The rotating magnetic sheet 1 comes into contact with the magnetic head 26 inserted through the head insertion opening 9 of the jacket 6, and predetermined recording and reproduction is performed. At this time, the pad 27 inserted through the opening 10 of the jacket 6 presses the magnetic sheet 1 onto the magnetic head 26 with an appropriate contact pressure.

As described above, according to the present invention, the disk-shaped recording medium is configured to be chucked from above and below by the chuck ring disposed in the jacket and the magnet provided in the drive means. There is no need to insert the chuck mechanism consisting of the upper and lower parts into the jacket from the upper and lower directions, respectively, which simplifies the chuck mechanism and increases the degree of freedom in mounting the jacket.

Furthermore, the downward movement of the chuck ring is regulated by the engaging part of the chuck ring engaging with the regulating part provided at the lower end of the ring-shaped rib, so that the chuck ring will not be moved downward more than necessary. This may cause the entire chuck ring to escape downward from within the ring-shaped rib and be moved to other parts of the jacket through the gap between the disk-shaped recording medium and the ring-shaped rib, resulting in unchuckability or recording/reproduction failures. can be reliably prevented. Therefore,
In order to prevent the chuck ring from moving to other parts through the above-mentioned gap, it is not necessary to make the chuck ring thicker in the vertical direction than necessary, and by increasing the thickness of the chuck ring, the weight of the chuck ring increases and the weight of the whole jacket is increased. It is possible to prevent the disk jacket from becoming heavy and placing an excessive load on the disk jacket attachment mechanism, and from being susceptible to damage due to the disk jacket falling.

Furthermore, when the engaging part of the chuck ring engages with the regulating part, the tip of the chuck ring is regulated so that it comes into contact with the upper surface of the disc-shaped recording medium supported on the lower half side. If the disk jacket is not in use, the entire weight of the chuck ring will be applied to the top surface of the disk-shaped recording medium, effectively preventing deformation such as bending of the disk-shaped recording medium. can do.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a floppy disk according to an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view of the same, and FIG. 3 is a vertical cross-sectional view of a main part of the main body of the device equipped with the floppy disk. In the symbols used in the drawings, 1...magnetic sheet, 2...positioning hole (center hole), 3...engaging hole, 4...upper half, 5...lower half, 6...jacket, 8... ...Driving spindle insertion opening (driving means insertion hole), 9...Head insertion opening, 11
...Cylindrical part (ring-shaped rib), 12...Ring-shaped locking piece (regulating part), 13...Chuck ring, 1
4...flange part (engaging part), 21... spindle (driving means), 22... positioning pin (positioning part), 23... permanent magnet, 24... drive pin.

Claims (1)

[Claims for Utility Model Registration] A jacket in which a disc-shaped recording medium having a center hole is rotatably housed therein and is composed of a pair of upper and lower halves; and a jacket provided in at least one half of the pair of upper and lower halves. a drive means insertion hole provided in the lower half into which a drive means for driving the disk-shaped recording medium is inserted; and a drive means insertion hole in the inner surface of the upper half. a ring-shaped rib provided at a position; a gap provided between a lower end of the ring-shaped rib and the disc-shaped recording medium; A chuck ring comprising a gap for rotating the medium while floating in the gap, and a magnetic material disposed in the ring-shaped rib so as to be movable up and down,
a chuck ring that is magnetically attracted to a magnet provided on the upper part of the driving means and grips the disc-shaped recording medium between the chuck ring and the upper part of the driving means; an engaging part provided on the chuck ring; a regulating portion provided at a lower end of the ring-shaped rib and engaging with the engaging portion of the chuck ring to restrict downward movement of the chuck ring, and inserting the driving means into the lower half. The positioning part inserted into the hole and provided on the upper part of the driving means is inserted into the center hole of the disk-shaped recording medium, and the chuck ring is magnetically attracted by the magnet to cause the chuck ring and the driving means to be attached to each other. The disc jacket is configured to grip the disc-shaped recording medium from above and below by the upper part of the disc jacket, and rotate the disc-shaped recording medium with the disc-shaped recording medium suspended in the gap.