JPH0765530A - Disc cartridge - Google Patents

Abstract

(57) [Abstract] [Purpose] A magnetic disk sheet 4 is rotatably housed in a cartridge body constituted by combining an upper shell 2 and a lower shell 3 and the magnetic disk sheet 4 is cleaned. In the disk cartridge (3.5 inch micro-floppy disk) provided with the means, the uniform cleaning effect can be obtained on both upper and lower sides of the magnetic disk sheet 4. [Structure] A cleaning member 15 is welded to the lower shell 3 side as a disk cleaning means. In this cleaning member 15, a liner (nonwoven fabric) 17 as a disk cleaning material that is in contact with the upper and lower surfaces of the magnetic disk 4 is attached to a sheet-shaped lifter member 16 that is bent so as to sandwich the magnetic disk sheet 4 from above and below. Composed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a disk cartridge,
In particular, the present invention relates to a disc cartridge having a cleaning means for cleaning the disc therein.

[0002]

2. Description of the Related Art First, an example of a disk cartridge incorporating a cleaning means will be described with reference to FIGS. What is shown in the figure is a disk cartridge for magnetic recording generally called a 3.5-inch micro-floppy disk. In the figure, reference numeral 1 denotes a cartridge body, and the cartridge body 1 is made of a plastic upper shell 2 and a lower shell. The magnetic disk sheet 4 is rotatably housed in the cartridge body 1.

A center hub 5 made of metal is attached to the center of the magnetic disk sheet 4, and the center hub 5 is exposed to the outside through a center hole 6 formed in the center of the lower shell 3. When the cartridge is mounted on the disk drive device, the center hub 5 is magnetically attracted to the disk table on the disk drive device side, and the magnetic disk sheet 4 is rotationally driven.

Head windows 7 and 8 are formed in the upper shell 2 and the lower shell 3 of the cartridge body 1 so that a part of the magnetic disk sheet 4 is exposed. The disk cartridge is mounted in a disk drive device. In this state, the recording / reproducing magnetic head is inserted from the head windows 7 and 8 and slidably contacts the magnetic disk sheet 4.

Further, a shutter 9 for opening and closing the head windows 7 and 8 is attached to the cartridge body 1, that is, the head windows 7 and 8 are opened by the shutter 9 when the disk cartridge is not in use (storage state). When the magnetic disk sheet 4 is closed and protected from dust and the disk cartridge is mounted in the disk drive device, the shutter 9 is slid laterally by the shutter opening mechanism on the disk drive device side to open the head windows 7 and 8. The internal magnetic disk sheet 4 is exposed. Reference numeral 10 is a write protector for preventing erroneous erasure.

The conventional disk cleaning means in the disk cartridge (3.5 inch micro-floppy disk) constructed as described above is composed of liners 11 and 12 arranged above and below the magnetic disk sheet 4, as is apparent from FIG. . That is, the liners 11 and 12 are formed of a non-woven fabric in an annular shape so as to cover the recording surface of the magnetic disk sheet 4 almost entirely except for the head windows 7 and 8, and these are formed in the peripheral portions of the upper and lower shells 4 and 4, respectively. 5 is welded to the inner surface side.

A lifter 13 made of a metal plate is obliquely attached to the inner surface of the lower shell 3 by welding and caulking, and a plurality of ribs 14 project from the inner surface of the upper shell 2 corresponding to the lifter 13. It is arranged so that the liners 11 and 12 are pressed against the magnetic disk sheet 4. When the magnetic disk sheet 4 is rotated in this state, dust attached to both surfaces of the magnetic disk sheet 4 is adsorbed by the liners 11 and 12, whereby the magnetic disk sheet 4 is cleaned.

[0008]

However, in the conventional disc cartridge constructed as described above, the liner 1 as the disc cleaning means is used.
Since 1 and 12 are formed to cover substantially the entire recording surface of the magnetic disk sheet 4 except the head windows 7 and 8, a large amount of liner fragments are easily generated during manufacturing and assembly, which is a cause. As a result, many defective products were generated, which reduced the yield. Further, even after the assembling, the liner pieces and dust taken into the inside of the liner fell off, causing an error during recording and reproduction.

Conventionally, since the lifter 13 for pressing the liner against the magnetic disk sheet is provided only on the lower shell 3 side, the cleaning effect is not uniform on the upper and lower surfaces of the magnetic disk sheet 4, that is, the magnetic disk sheet. 4 has a problem that the cleaning power on the upper surface side is lower than that on the lower surface side.

The present invention has been made for the purpose of solving the above problems.

[0011]

In order to achieve the above-mentioned object, the present invention has a disc body rotatably housed in a cartridge body constructed by combining an upper shell and a lower shell and cleaning the disc. A disk cartridge in which a cleaning member for cleaning the disk is arranged. A liner as a cleaning material is attached, and a cleaning member having such a structure is welded to either one of the upper shell and the lower shell in the vicinity of the bent portion of the lifter member.

[0012]

In the disk cartridge of the present invention constructed as described above, the cleaning member presses the disk from both upper and lower surfaces, so that the upper and lower surfaces of the disk can be uniformly cleaned. Also, with this cleaning member, the area used by the liner is smaller than before,
Moreover, since pressure is constantly applied to the used part, the fragments of the liner do not fall off, and errors are reduced.

[0013]

Embodiments of the present invention will be described below with reference to FIGS. 3 to 8. The portions corresponding to those of the conventional example shown in FIGS. 1 and 2 are designated by the same reference numerals and the description thereof will be omitted. To do.

The disk cleaning means in the disk cartridge (3.5-inch micro-floppy disk) of this embodiment uses one cleaning member 15 for simultaneously cleaning the upper and lower recording surfaces of the magnetic disk sheet 4 to rotate the magnetic disk sheet 4. It is configured by being attached to the inner surface side of the lower shell 3 substantially perpendicular to the direction.

That is, the cleaning member 15 is a tongue portion 16a, 16b of a lifter member 16 made of a PET (polyethylene terephthalate) sheet which is bent by about 180 ° so as to sandwich the magnetic disk sheet 4 from above and below.
A liner (nonwoven fabric) as a disk cleaning material that contacts the upper and lower recording surfaces of the magnetic disk sheet 4, respectively.
17 is attached.

The upper and lower tongue pieces 16a and 16b of the lifter member 16 are formed symmetrically with respect to the main body of the lifter member 16 so that the liner 17 makes good contact with the recording surface of the magnetic disk sheet 4, respectively. It has a predetermined angle. The length a of the adhered portion of the liner 17 at the tips of the tongue portions 16a and 16b of the lifter member 16 is long enough to cover the width of the recording surface of the magnetic disk sheet 4.

Further, at the sticking portions of the liner 17 on the tongue portions 16a and 16b, the width of the liner 17 becomes wider from the bent portion side of the lifter member 16 toward the free end portion side. , 16b are provided with an angle b on the leading edge. This is because the liner 17 hits (pressure) the magnetic disk sheet 4 by the lifter member 1.
Since it is expected that it will become weaker as it gets farther from the bent portion of 6, the liner 17 of the tongue pieces 16a and 16b is accordingly increased.
This is because the liner 17 hits the magnetic disk sheet 4 substantially uniformly over the entire length by attaching the angle b to the sticking portion.

Further, in the cleaning member 15 of this example, concave holes 18a and 18b for clearance adjustment are provided near the bent portion of the lifter member 16. That is, the recessed holes 18a and 18b are provided at symmetrical positions with respect to the center bending line of the lifter member 16. By forming the recessed holes 18a and 18b by embossing, as shown in FIG. When the lifter member 16 is bent, the concave surfaces 18a, 18a
The convex portions on the opposite surface side of b are brought into contact with each other, whereby the internal clearance of the cleaning member 15, that is, the clearance between the upper surface side and the lower surface side of the lifter member 16 is determined. Therefore, the internal clearance of the cleaning member 15 is adjusted by changing the depths of the concave holes 18a and 18b (protruding amounts of the convex portions), and the liner 17 is adjusted.
The contact of the magnetic disk sheet 4 with the magnetic disk sheet 4 can be adjusted.

FIG. 8 shows the manufacturing process of the cleaning member 15 of this example. First, as shown in FIG. A, an adhesive 21 is applied to the base material 20 of the lifter member made of PET film.
Is applied, a liner (nonwoven fabric) 17 is placed thereon, and the rollers 22a and 22b are sandwiched and adhered. Next, as shown in FIG. 4B, concave holes 18a and 18b for clearance adjustment are formed by die pressing. Then, the base material (PE
T film) 20 is punched out in the shape of a cleaning member as shown by the broken line in FIG. 6C, and the tongue pieces 16a and 16b of the cleaning member 15 thus obtained are bent at a predetermined angle c as shown in FIG. As shown in FIG. 6E, the lifter member 16 is bent approximately 180 ° from the center so that the liners 17 face each other.

The cleaning member 15 manufactured in this manner is then attached to the lower shell 3 near the bent portion.
Is welded to the inner surface side (this welded portion is shown as a welded portion 19 in FIG. 5). The location where the cleaning member 15 is welded is selected on the outer surface of the storage portion for the magnetic disk sheet 4 on the inner surface side of the lower shell 3.

The disk cartridge (3.5 inch micro-floppy disk) of the present example configured as described above
In the above, when the magnetic disk sheet 4 is rotated, dust adhering to the upper and lower recording surfaces of the magnetic disk sheet 4 is adsorbed by the liner 17 of the cleaning member 15, thereby cleaning the magnetic disk sheet 4. Done.

In this cleaning means,
Since the cleaning member 15 uniformly presses the magnetic disk sheet 4 from both upper and lower sides, the cleaning force on the upper surface side of the magnetic disk sheet 4, which has conventionally been weaker, is increased, and the magnetic disk sheet and the recording surfaces on both upper and lower sides of the magnetic disk sheet 4 are increased. Can be effectively cleaned.

In addition, in the cleaning member 15, the use area of the liner (nonwoven fabric) 17, which has been a cause of an error due to its fallen object, is significantly smaller than that of the conventional one (about 1/16), and the used portion Since the pressure is always applied, the non-woven fabric fragments and the like do not fall off, and as a result, the error during recording and reproduction is greatly reduced.

Further, in the cleaning member 15 of this embodiment, the liner 17 is adhered evenly to the magnetic disk sheet 4 by forming an angle b on the sticking portions of the liner 17 on the tongue portions 16a and 16b of the lifter member 16. And a good cleaning effect can be obtained.

Further, in the cleaning member 15 of this example, the contact of the liner 17 with respect to the magnetic disk sheet 4 can be adjusted by changing the depths of the clearance adjusting recessed holes 18a and 18b.

Although the so-called 3.5-inch micro-floppy disk is shown as an example of the disk cartridge in the above-mentioned embodiments, the present invention is also applicable to a magneto-optical disk cartridge, MD (mini disk) and the like. Of course, it can be widely applied.

[0027]

As is apparent from the above description, according to the present invention, an even cleaning effect can be obtained on both the upper and lower sides of the disk, and errors caused by the liner (nonwoven fabric) are reduced. It is possible to provide a high-quality disc cartridge having an excellent cleaning function.

[Brief description of drawings]

FIG. 1 is a perspective view of a disk cartridge (3.5 inch micro floppy disk).

FIG. 2 is an exploded perspective view of a conventional disc cartridge.

FIG. 3 is an exploded perspective view of the disc cartridge of the embodiment.

FIG. 4 is a plan view of a lower shell of the disc cartridge of the embodiment.

FIG. 5 is a perspective view of a cleaning member.

FIG. 6 is a plan view (developed state) of the cleaning member.

FIG. 7 is a cross-sectional view of a main part of a cleaning member.

FIG. 8 is an explanatory diagram of a manufacturing process of the cleaning member.

[Explanation of symbols]

 2 Upper shell 3 Lower shell 4 Magnetic disk sheet 15 Cleaning member 16 Lifter member 16a, 16b Tongue portion 17 Liner (nonwoven fabric)

Claims (1)

[Claims] 1. A disk cartridge comprising a cartridge body constituted by combining an upper shell and a lower shell in which a disk as a recording medium is rotatably housed and a cleaning member for cleaning the disk is arranged. In the cleaning member, liners as disc cleaning materials that come into contact with the upper and lower recording surfaces of the disc are attached to the tongue portions of a sheet-like lifter member that is bent so as to sandwich the disc from above and below. A disk cartridge constituted by fixing the cleaning member to either one of the upper shell and the lower shell near the bent portion of the lifter member.