JPH0447371B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a magnetic head cleaning disk cartridge for cleaning a magnetic head by being attached to a magnetic recording rereading apparatus using a magnetic disk cartridge.

[Prior Art] FIG. 7 is an exploded perspective view of a conventional magnetic head cleaning disk cartridge. This disk cartridge includes a cartridge case 51 consisting of an upper case 51a and a lower case 51b, a liquid-absorbing cleaning disk 52 rotatably housed in the cartridge case 51, and Magnetic head insertion port 53
It mainly consists of a shutter 54 that opens and closes the shutter.

When this magnetic head cleaning disc cartridge is not in use, the magnetic head insertion slot 5
If dirt enters the cleaning disk 52 from 3 and soils the cleaning disk 52, the cleaning function will be reduced, so the magnetic head insertion port 53 is always closed by the shutter 54 when not in use. It's becoming like that. And this shutter 5
In order to maintain the shutter 4 in the closed state, the shutter 54 is always elastically biased in the closed direction by a spring member (not shown) provided in the cartridge case 51.

When using this magnetic head cleaning disc cartridge, open the magnetic head insertion opening 53 of the cartridge case 51 by moving the shutter 54 with one hand against the elasticity of the above-mentioned spring member.
Hold the cylinder containing the cleaning liquid with your other hand, and insert the nozzle of the cylinder into the magnetic head insertion slot 5.
3 and pour the cleaning liquid into the cleaning disk 52 to impregnate it.

Thereafter, the shutter 54 is released to automatically close the magnetic head insertion port 53, and the cleaning disk cartridge is loaded into the recording/reproducing apparatus to be cleaned. When installed in the recording/reproducing apparatus, the shutter 54 is automatically opened by the rotary lever, and the sliding surface of the magnetic head comes into contact with the cleaning disk 52.

In this state, the magnetic head is cleaned by rotating the cleaning disk 52 impregnated with cleaning liquid.

[Problem that the invention seeks to solve]

By the way, in this conventional magnetic head cleaning disk cartridge, the magnetic head insertion port 53 is
Since the opening is used as a cleaning liquid inlet, it is necessary to open the shutter against the elasticity of the spring member each time to inject the cleaning liquid, and then hold the shutter in that position by hand to maintain the open state. Therefore, the work of injecting the cleaning liquid is extremely troublesome.

Further, when cleaning liquid is injected from the magnetic head insertion port 53 as in the conventional magnetic head cleaning disk cartridge, the cleaning liquid is impregnated and retained in the portion of the cleaning disk 52 facing the magnetic head insertion port 53. On the other hand, the starting torque of a recording/reproducing device is relatively small.
Therefore, when the above-mentioned magnetic head cleaning disk cartridge is installed in a recording/reproducing device and an attempt is made to start cleaning the magnetic head, the magnetic head or (as well as) the pad presses against the portion of the cleaning disk 52 impregnated with cleaning liquid. This has the drawback that the cleaning disk 52 becomes stuck and its adhesion prevents the cleaning disk 52 from starting.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic head cleaning disk cartridge which eliminates the drawbacks of the prior art and allows efficient cleaning of magnetic heads.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides a magnetic disk drive system comprising a case having a magnetic head insertion port and a drive shaft insertion port at predetermined locations, and a liquid-absorbing cleaning disk rotatably housed inside the case. In the head cleaning disk cartridge, at least two injection holes for injecting cleaning liquid are provided in the circumferential direction at locations opposite to the magnetic head insertion port with the drive shaft insertion port of the case in between. This is a characteristic feature.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view of a magnetic head cleaning disk cartridge according to a first embodiment of the present invention.
Shown with shutter removed.

This magnetic head cleaning disk cartridge includes a cartridge case 1 made of hard synthetic resin, a liquid-absorbing cleaning disk 2 with a diameter of about 85 mm rotatably housed in the cartridge case 1, and It mainly consists of a shutter (not shown) that opens and closes the magnetic head insertion opening 3 of the cartridge case 1.

A drive shaft insertion opening 4 is formed approximately in the center of the cartridge case 1, and the cleaning disk 2
A hub 5 provided at the center of the drive shaft is disposed to face the drive shaft insertion port 4 of the drive shaft.

At a position opposite to the magnetic head insertion opening 3 with the drive shaft insertion opening 4 of the cartridge case 1 in between,
Three injection holes 6a, 6b, and 6c each having a diameter of about 4 mm are formed to penetrate the side wall of the cartridge case 1.

The distance R of the injection holes 6a, 6b, 6c from the disk rotation center O is set such that R2<R1=R3, and each injection hole 6a, 6b, 6c is
The hole diameter c is designed to be slightly larger than the outer diameter of a cylinder containing a cleaning liquid (not shown) or the nozzle diameter of a dropper.

The cleaning disk 2 can be made of a liquid-absorbing material such as rayon, polyester, polyamide, etc. In particular, long fibers of polyester are dispersed in a non-directional and irregular shape, intertwined to form a sheet, and then bonded. It is preferable that the adhesive is self-fused by heat and pressure without using any agent. In particular, the cleaning disk 2 made of this material has the feature that when droplets of cleaning liquid (for example, trifluoroethane) are dropped, the cleaning liquid (for example, trifluoroethane) is evenly dispersed and impregnated in a substantially circular shape centered on the droplet position.

FIG. 2 is a plan view of the cleaning disk 2, and FIG. 3 is a sectional view taken along the - line in FIG. As mentioned above, the cleaning disk 2 is made of a so-called nonwoven fabric in which fibers are interlaced in a non-directional and irregular manner, and has numerous irregularities formed on its surface. Therefore, even if the collar portion 7 of the metal hub 5 is fixed to the inner peripheral portion of the cleaning disk 2, the attachment strength is weak, and there is a fear that the hub 5 and the collar portion 7 may come apart while the cleaning disk 2 is rotating. In order to solve this problem, in this embodiment, a ring 8 having a flat surface made of synthetic resin, preferably the same synthetic resin as the cleaning disk 2, is prepared, and this ring 8 is used as the cleaning disk. It is heat-sealed 9 to the inner circumferential portion of 2 (see FIG. 2). The flat lower surface of the ring 8 and the collar portion 7 of the hub 5 are then joined together by appropriate means such as heat fusion or adhesion. This ensures that the cleaning disk 2 and the hub 5 are connected reliably, and there is no fear that the cleaning disk 2 and the hub 5 will come apart while the cleaning disk 2 is rotating.

For thermal fusion, if the melting point of the ring 8 is lower than the melting point of the cleaning disk 2, the cleaning disk 2 will not be deformed into waves. Furthermore, if the ring 8 or the cleaning disk 2 is made of a transparent material through which ultraviolet rays can pass, an ultraviolet curing resin is applied between the cleaning disk 2 and the ring 8, and ultraviolet rays are irradiated, the unevenness of the cleaning disk 2 Adhesive strength can be increased.

FIG. 4 is an explanatory diagram showing the impregnation state of the cleaning liquid injected from each injection hole 6a, 6b, and 6c. In the figure, the shaded area shows the cleaning liquid impregnated area 10, and a wrapped area is formed between the adjacent impregnated area 10. T is a cleaning track with which the magnetic head comes into contact, and the magnetic head is cleaned by reciprocating between the cleaning disks 2 in the radial direction of the disk 2. T1 is the innermost circumference of the cleaning track T, T2 is the outermost circumference of the cleaning track T,
are shown respectively.

As shown in the figure, each impregnated area 10 of the cleaning liquid is arranged so as to sufficiently cover the cleaning track T.
A wrap portion is formed on the cleaning track T, and the injection holes 6a, 6b, 6c are arranged so that the wrap portion sufficiently covers the innermost circumferential portion T1.
The position of is set. Since the cleaning disk 2 rotates at a constant speed, the peripheral speed of the innermost circumferential portion T1 of the cleaning track T is slower than that of the outermost circumferential portion T2. Therefore, when the magnetic head moves to the innermost circumference T1 side, there is a concern that the cleaning effect will not be fully exerted, so by impregnating and retaining a sufficient amount of cleaning liquid in the innermost circumference T1 side, the attenuation of the cleaning effect can be prevented. It is prevented.

Figure 5 shows the above-mentioned polyester long fibers in a non-directional manner.
FIG. 3 is a diagram showing the permeation characteristics of a cleaning liquid in a cleaning disk which is irregularly dispersed and intertwined to form a sheet and is self-fused by heat and pressure without using an adhesive.

In this characteristic test, trafluoroethane was used as the cleaning liquid, and when 0.05cc was sprayed once on the cleaning disk,
The maximum permeation diameter (permeation amount) of the cleaning liquid is measured for each basis weight.The maximum and minimum values of the measurements are taken multiple times for each basis weight and are plotted in the diagram. The range of variation in the amount of penetration is indicated by diagonal lines. As is clear from this figure, the cleaning disk having the above-mentioned structure has the advantage that the cleaning liquid has good permeability and there is little variation in the amount of impregnation.

FIG. 6 is a plan view of a magnetic head cleaning disk cartridge according to a second embodiment of the present invention.

This embodiment differs from the first embodiment as follows:
These are the formation positions of injection holes 6a, 6b, and 6c. That is, in the case of this embodiment, the injection holes 6a, 6b, 6c
The distance R from the disk rotation center O is R1>R2
>R3.

Since the other configurations are the same as those of the first embodiment, their explanation will be omitted.

Further, in the above embodiment, three circular injection holes were provided, but they do not necessarily have to be circular.
Moreover, the number can also be selected as appropriate.

〔Effect of the invention〕

As described above, in the present invention, a hole for injecting a cleaning liquid is formed in the case on the side opposite to the magnetic head insertion port with the drive shaft insertion port in between. Therefore, there is a time lag between the time the cleaning disk cartridge filled with cleaning liquid is inserted into the recording/playback device and the cleaning disk begins to rotate until the part impregnated with and holding the cleaning liquid reaches the magnetic head. During this time, the rotational torque of the disk increases, so the starting of the cleaning disk is not hindered.

Further, as shown in the embodiment, if at least two injection holes are provided and the distances of the injection holes from the disk rotation center are different, the cleaning liquid can be injected and impregnated over a wide area of the cleaning disk. The cleaning effect can be achieved evenly.

[Brief explanation of the drawing]

1 is a plan view of a magnetic head cleaning disk cartridge according to a first embodiment of the present invention, FIG. 2 is a plan view of a cleaning disk used in the cartridge, and FIG. 3 is a cross section taken along the line -- in FIG. 4 is an explanatory diagram showing the state of impregnation of the cleaning liquid into the cleaning disk, and FIG. 5 is a characteristic diagram showing the relationship between the basis weight of the cleaning disk and the amount of cleaning liquid permeated.
FIG. 6 is a plan view of a magnetic head cleaning disk cartridge according to a second embodiment of the present invention;
The figure is an exploded perspective view of a conventional magnetic head cleaning disk cartridge. 1...Cartridge case, 2...Cleaning disk, 3...Magnetic head insertion slot, 6a, 6
b, 6c...Injection hole, 10...Impregnation area, O...
Disk rotation center, R1, R2, R3... Distance from the disk rotation center.

Claims (1)

[Scope of Claims] 1. A magnetic head cleaning disk cartridge comprising a case having a magnetic head insertion port and a drive shaft insertion port at predetermined locations, and a liquid-absorbing cleaning disk rotatably housed inside the case. A magnetic head characterized in that at least two injection holes for injecting a cleaning liquid are provided in the circumferential direction at locations opposite to the magnetic head insertion port with the drive shaft insertion port of the case in between. Cleaning disc cartridge.