JPS5823321A - Floppy drive head cleaning diskette - Google Patents

Abstract

PURPOSE:To obtain sufficient cleaning effects, by providing chemical agent charging openings of the jacket of a cleaning diskette so that the openings can not be overlapped to a platen and a jacket folding. CONSTITUTION:In chemical agent discharging openings 55 and 56 for cleaning, a center line 57 in the radial direction of the openings is titled with respect to a side of a jacket 18 and the openings are opened near the corner of a plane of the jacket 18 apart from folding parts 49 and 50 of the ridge of the jecket 18 and the lowering in the strength of the jacket can possibly be suppressed. The openings are opened at the length and location up to the innermost circumference from a track 5 of a disc 20. The opening is not provided at the jacket near the left side of an opening for the head viewed from the jacket side so that the disc 20 is out of contact with any of the platen 8 or a form pad 9.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cleaning diskette for removing dirt from a magnetic head of a drive into which a floppy disk is loaded.

The magnetic head of a floppy disk drive records and plays by contacting the surface of the floppy disk that rotates at high speed, so magnetic particles and binder generated by rubbing the magnetic layer of the disk adhere to the head, causing damage to the head. If the gap closes or the distance between the disk and the head increases, not only will calculation errors occur, but the head surface will become rough and damage the disk surface, requiring frequent cleaning of the head surface.

Regarding head cleaning, since it is difficult to manually clean the head surface built into the floppy drive device from the outside, a cleaning diskette is inserted into the drive and the head is scrubbed with a rotating cleaning disk. It looks like this.

FIG. 1 shows a conventionally known cleaning diskette, in which a disk-shaped cleaning disk (2) with a rotating shaft hole (1) and a white cleaning disk (2) is housed in a jacket (3). The illustrated sheet on the side 0 side of the jacket (3) is provided with an approximately half-moon-shaped chemical injection opening (4), and the opening (4) is located on the track 00 (5) of the cleaning disk (2) and on the innermost periphery. The opening (4) does not reach the opening, and both the left and right sides of the moving position (7) of the head (6) are open, but when using the drive with a disk for recording and playback, the head (6) to the left in contact with the disk surface, the platen (8) and foam pad (9) are pressed against the outside of the jacket on the side opposite to the head, so the conventionally known method as shown in FIG. When the cleaning diskette is inserted into the drive, the platen (8) directly contacts the surface of the cleaning disk (2) through the chemical injection opening (4), and the platen (8)
) is not only worn out, the surface of the disk (2) becomes dirty, the cleaning effect is significantly destroyed, and the drive is also damaged.

In addition, in order to maintain the strength of the jacket (3), the opening (4) in FIG.
Or the disc (
2) Even the outermost track 00(5) cannot be used sufficiently for cleaning.

Furthermore, due to the semicircular opening (4), the ratio of the area wetted by the cleaning chemical in the circumferential direction of the disk (2) and the area not wetted by the cleaning chemical differs depending on the radial position of the disk, which causes uneven head wiping. There was a drawback that it occurred.

Therefore, it was considered to have chemical injection openings (10) on both sides of the jacket (3) as shown in Figure 2. 9) and not only cause problems,
The inner edge of the opening (10) is the jacket folded part (11).
Track 00 (5
), the strength of the jacket is reduced, and since there is no index hole, the drive head cannot be loaded and cleaning is not possible. Note that (12) is an opening for the head.

In Figure 3, a fan-shaped chemical injection opening (13) is provided to enable even cleaning from track 00 (5) to the innermost track.
If the inner edge of 3) is extended to the folded part (11) of the jacket, it will not be possible to fully clean up to track 00 (5), and if it is expanded to become the inner edge of the opening (14), after folding, this part cannot be used to insert the disc. In addition to the difficult task of removing the folded part (11), the folded part (11) must be punched out, which significantly reduces the strength of the jacket. Furthermore, there is the disadvantage that index holes are not provided and a portion of the foam pad (9) comes into contact with the disc (2).

In Fig. 4, the drug solution injection opening (15) does not cover the folded part (11) of the jacket.
The platen (8) and foam pad (9) of the drive come into contact with the disk (2) as shown, and the strength of the jacket (3) is severely reduced due to the large number of openings.

Figure 5 shows that the cleaning disk (2) is attached to the platen (8).
) and the foam pad (9), but the folded part (
11), the track 00 (5) cannot be cleaned, and the folded part (11) is also punched out and the inner edge of the opening (
17), the disadvantage remains that the strength of the jacket is significantly reduced.

In addition, the cleaning disk (2) shown in Figures 1 to 5
As shown in FIG. 6, each of these is a disk-shaped sheet whose entire surface is white and has a rotating shaft hole (1) drilled therein.

The present invention eliminates all the drawbacks of various known or future cleaning diskettes as described above.

7 to 17 show embodiments of the present invention. 7th
The figure is an illustration of the present invention, illustrating a suitable range for providing a cleaning chemical injection opening on the side 0 side of the jacket (18) as a dotted pattern. , the radius (R) where the magnetic head (6) moves on the cleaning disk (20)
1) and the radius (R2), excluding the folded part (11) of the jacket edge, the jacket (1)
The angle between the vertical center line (M) of 8) and a straight line passing through the center (19) of the jacket is expressed as follows.

Points between angle A = 20 degrees and angle B = 70 degrees (21, 22, 2
3, 24, 25) excluding the area shown in (21, 25, 27), avoiding the vicinity of the round opening (26) of the jacket (18), and the angle C = 20 degrees. Angle D=70
An area (35) which is the area shown by (29, 30, 31, 32, 33) plus the area shown by (30, 34, 31) between degrees,
Avoiding the foam pad (9), draw the angle E = 55 degrees and the center line (
The area (40
) and (33, 36, 32), and the center line (M) so as to avoid the platen (8) from the area shown by (37, 41, 42, 43, 38) between the corner F and the center line. The area parallel to (
44, 41, 45, 46) and (41, 24
, 23, 42) can be provided with a drug solution injection opening.

FIG. 8 shows an embodiment of the present invention, in which a cleaning disk (20) with a rotating shaft hole (1) and a white cleaning disk (20) is attached to a jacket (
This jacket (18) has folded parts (49) and (50) on the edge of one side of the sheet folded at the fold line (48), and the folded parts (49) and (50) on both sides.
49) to the edge of the other side of the sheet (51) to form a rectangular envelope and insert the cleaning disk (20
) is inserted, and then the folded portion (50) is heat-sealed (51) to the edge of the opposing sheet to house the disc (20).

The jacket (18) has a rotary shaft round window (52) that is slightly larger than the rotary shaft hole (1) of the disk (20) on the sheet on the side 0 side shown in the figure and the sheet on the back side 1 side.
and the small index hole (5) on the disc (20).
There are two round openings (26) slightly larger than 3).
A notch (54) is provided to prevent damage when the jacket (18) is bent.

In FIG. 8, (55) and (56) are chemical solution injection openings for cleaning, and the radial center line (5
7) is inclined with respect to the side of the jacket (18), and the folded portions (49) (50) of the edge of the jacket (18) are
) is opened closer to the joint part of the surface of the jacket (18) which is further away from the outer surface of the jacket (18) to suppress a decrease in the strength of the jacket as much as possible, and the length from the track 00 (5) of the disk (20) to the innermost track, and the disc (20
) so that it can be sufficiently cleaned up to track 00 of the disk (20), and by not providing an opening in the jacket part near the left side of the head opening (12) when viewed from the side 0 side of the jacket. Platen (
8) or the foam pad (9). In addition, two small round openings (26) through which the index hole (53) of the disk (20) can be seen are placed in the round window for the rotating shaft on the opposite side of the head opening (12) with respect to the center of the jacket (18). An example of the present invention is shown in which it is provided near the edge of (52) and can be cleaned by head loading.

FIG. 9 also shows an embodiment of the present invention, and the upper right opening (56
) and openings (58) and openings (59) (60
), and these three openings form three wet and dry zones with the cleaning liquid in the circumferential direction of the disk (20), thereby increasing the cleaning effect.

FIG. 10 also shows an embodiment of the present invention, in which when the cleaning diskette is held in the hand and inserted into the drive, the fingers (61) of the hand holding the cleaning diskette are placed so that they do not touch the disk (20) as shown in FIG. The opening (58) in Figure 9 is made smaller and the fingers of the hand (
Openings (62), (63), and (64) are provided so that the surface of the jacket portion that is in contact with 61) is wide, and the angles indicating the positions of the openings are indicated in the figure.

FIG. 11 also shows an embodiment of the present invention, in which the opening in the upper half of the jacket (18) is removed and the jacket surface where there is a risk of fingers touching the disk surface when held in the hand is particularly widened, and the opening (65) ( 66).

FIG. 12 also shows an embodiment of the present invention, and the opening (65) in FIG.
is expanded upward to form an opening (67), and an opening (68) may be additionally provided.

FIG. 13 also shows an embodiment of the present invention, in which the head opening (12) is expanded in the circumferential direction to form an opening (69). Note that an opening (70) may be further provided.

In the examples of the present invention shown in FIG. 13, each side of the jacket has a length of 8.
The embodiment of the present invention shown in FIG. 14 has openings (71), (72), and (73) in a so-called mini diskette with a length of 5.25 inches.
and its position in angle. The two small round openings of the previous example are combined into one small opening (74) from the drive mechanism. (75) is the platen, (7
6) indicates the position of the foam pad.

To give an example of the material of the cleaning disk (20) of the present invention, it is made by randomly arranging 100% polyester long fibers, intertwining and dispersing them to form a laminated sheet, and applying heat and pressure without using an adhesive. A sheet made by self-fusion of fibers is punched out into a disk shape. Figures 16 and 17 show a portion of this cleaning disk.
This shows the arrangement of fibers at a magnification of 0 times. Polyester fibers with a thickness of 2 to 4 denier are either in a compressed state (77) as shown in Figure 16, or in a straight state (77) as shown in Figure 17. 78).

In addition, this cleaning disk has a bulky property of 3 grammage
．． OZ/YD2 (approximately 102g/m2), has a gripping strength of 60-65 pounds (27-30Kg), and the elongation at break ranges from 40% of the straight fiber type to 107% of the compressed fiber type, and has high energy absorption. It maintains excellent durability and life until breakage, and has excellent tear strength. In addition, the yarn does not fray at the cut end, has excellent air permeability, and is made of 100% polyester, so the relative humidity is 98%.
The moisture content is only 0.5%, it maintains the same physical properties when wet and dry, has excellent dimensional stability, and maintains rigidity with little shrinkage when wet. In addition, it has excellent resistance to deterioration such as mold and weather resistance, and the operating temperature is 1.
It can withstand temperatures from 77 degrees to 210 degrees.

In addition, it exhibits excellent chemical resistance to acids and alkalis with a pH range of 0.1 to 10 at room temperature, and extremely high resistance to organic solvents such as hydrocarbons, aliphatic alcohols, and ketones. It also shows good resistance to inert halogen solvents such as carbon trichloride and carbon tetrachloride. Regarding wear resistance, the basis weight is 6.0OZ/YD2 (203g/
m2) ■ Shrinkage fiber type is available using a taper type abrasion tester (
It can withstand 3600 wears under a load of 500g.

As described above, the cleaning disk used in the present invention has characteristics suitable for infiltrating the cleaning chemical solution and wiping the head during cleaning.

The cleaning chemical solution is one that does not damage the disk (20) or the magnetic head (6), such as low boiling point Freon TF or Freon TF containing 9% isopropyl alcohol.
, a mixture of 91% isopropyl alcohol and 9% water is poured onto the surface of the cleaning disk (20) from the chemical injection opening and diffused to wet the surface of the cleaning disk (20), so that the cleaning chemical liquid impregnates and wets the disk (20) in the circumferential direction. The dry areas should be arranged in a radial pattern, alternating with dry areas.

This cleaning diskette according to the present invention is inserted into the drive, and while rotating the disk (20), the head (6) is brought into contact with the surface of the disk (20) through the head opening (12), and the head (6) is brought into contact with the surface of the disk (20) in the direction (7). The head alternately contacts the dry surface of the rotating disk and the surface moistened with the cleaning chemical solution, and the head is alternately washed with the cleaning chemical solution and wiped with the dry disk surface to wipe away dirt from the head. It is meant to be removed.

As shown in FIG. 15, the cleaning disk (20) of the present invention has a ring (79) with a black ring (79) printed in black that does not transmit or reflect light on the annular portion whose radius is the index hole (53). It is. If the disc (20) is made of a material such as a synthetic sheet or synthetic paper and transmits or reflects light, a black ring (79) like this
and an index hole (53) in the black ring.
), the drive can accurately detect the rotational position of the disk and load the head.

The diameter of the index hole (53) is d1, the diameter of the small round opening in the jacket is d2, the width of the black ring (79) is W, the distance from the center (19) to the innermost edge of the drug injection opening is R1, and the distance of the black ring (79) is R1. Assuming that the distance to the inner edge is R3 and the distance to the outer edge of the round opening of the jacket is R4, there is a relationship shown in the following equation.

d1≦d2≦W R4≦R3+W≦R1 If the disk does not transmit or reflect light, it is not necessary to provide the black ring as shown in FIG.

In the above example, various modifications such as making the shape of the chemical injection opening of the jacket circular or oval, or increasing or decreasing the number of openings as appropriate are all included in the present invention.

According to the present invention, the cleaning chemical injection opening provided in the jacket of the cleaning diskette can be fully used for cleaning up to track 00 of the disk, and head loading is possible, and the disk comes into contact with the platen or foam pad of the tribe. Because it does not damage the cleaning diskette and drive, it can be cleaned smoothly.It also minimizes the decrease in strength due to openings in the jacket, and the disk can be cycled dry and wet multiple times, so the cleaning effect is great, and it does not damage the head. It is an industrially very important invention that exhibits many remarkable effects.

[Brief explanation of drawings]

Fig. 1 is a plan view of a conventionally known example, Fig. 2 is a plan view of a first conventional example, Fig. 3 is a plan view of a second conventional example, Fig. 4 is a plan view of a third conventional example, and Fig. 5. is a plan view of the fourth conventional example, FIG. 6 is a plan view of a conventionally known cleaning disk, FIG. 7 is a plan view of an embodiment of the chemical liquid injection opening of the present invention, and FIG.
9 is a plan view of the second embodiment of the invention, FIG. 10 is a plan view of the third embodiment of the invention, and FIG. 11 is a plan view of the third embodiment of the invention. Plan view of the fourth embodiment, 12th
13 is a plan view of the sixth embodiment of the present invention, FIG. 14 is a plan view of the seventh embodiment of the present invention, and FIG. 15 is a plan view of the seventh embodiment of the present invention. 16 is a partially enlarged view of the cleaning disk embodiment of the present invention; FIG. 17 is also a partially enlarged view of the cleaning disk embodiment of the present invention; 20...Cleaning disk 18. ...Jacket 5...Track 00 55, 56, 58, 59, 62, 63, 64, 65, 6
6, 67, 68, 69, 70, 71, 72, 73...
Chemical solution injection openings 11, 49, 50...Folded portion on the edge of the jacket 12...Openings for the head 26, 74...Small round opening 52...Round window for the rotating shaft Applicant Yoshiro Nakamatsu

Claims (1)

[Claims] A cleaning disk is placed in the jacket, and a chemical solution injection opening is provided in the jacket at the length and position from track 00 of the disk to the innermost track, and the opening end of the first track 00 is formed by the folded part of the edge of the jacket. The jacket is placed in a position where it cannot be hidden, and there is no opening in the jacket near the left side of the head opening provided in the jacket when viewed from the side 0 side of the jacket, and two small round openings are placed close to each other. A floppy drive head cleaning diskette, characterized in that the floppy drive head cleaning diskette is provided on the opposite side of the head opening with respect to the center of the disk, and near the edge of the rotary shaft round window of the jacket.