JPH0433532Y2 - - 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/reproducing apparatus using a magnetic disk cartridge.

[Conventional technology]

FIG. 8 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 disk cartridge is not in use, the magnetic head insertion slot 5
If dirt enters the cleaning disk 52 from the shutter 3 and soils the cleaning disk 52, the cleaning function will be reduced.
Therefore, the magnetic head insertion port 53 is always closed. In order to keep the shutter 54 closed, the cartridge case 51
The shutter 54 is always elastically biased in the closing direction by a spring member (not shown) provided therein.

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 rotating lever, and the sliding surface of the magnetic head comes into contact with the cleaning disk.

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

[Problem that the invention attempts to solve]

By the way, in this conventional magnetic head cleaning disk cartridge, the magnetic head insertion port 53 is
Since this 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 attached to 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.

In order to overcome these drawbacks, the present inventor proposed a magnetic head cleaning cartridge in which an injection hole 6 for injecting cleaning liquid is provided in a location other than the magnetic head insertion port of the cartridge case.

If the injection hole is too large, dirt will enter the cartridge case through that part and reduce the cleaning effect, so the size of the injection hole is designed to be slightly larger than the nozzle of the cleaning liquid injection cylinder. . Therefore, a portion of the cleaning liquid injected into the cartridge case leaks onto the cartridge case from the gap between the injection hole and the nozzle. This has the problem that the top surface of the cartridge case gets wet and spoils its appearance.

It is an object of the present invention to provide a magnetic head cleaning disk cartridge which eliminates the drawbacks of the prior art and is easy to handle without deteriorating its appearance.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention comprises a case having a magnetic head insertion hole and a drive shaft insertion hole at predetermined locations, and a magnetic head equipped with a liquid-absorbing cleaning disk rotatably housed inside the case. The head cleaning disk cartridge is characterized in that the case is provided with an injection hole for injecting a cleaning liquid, and a liquid absorbent for preventing leakage is provided on the outer periphery of the injection hole.

〔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 consists of a cartridge case 1 made of hard synthetic resin and having a pair of flat case pieces fixed to its periphery, and a liquid absorbent case 1 rotatably housed inside the cartridge case 1. The main components are a cleaning disk 2 having a diameter of about 85 mm, and a shutter (not shown) for opening and closing 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, 6c with a diameter of about 4 mm
is formed to penetrate the side wall of the cartridge case 1.

By forming the case piece on the side where the injection holes 6a, 6b, and 6c are formed from a transparent material, it becomes easy to check the degree of dirt on the cleaning disk 2.

As shown in FIG. 6, a counterbore-like stepped portion is formed around the outside of the injection hole 6, and a ring-shaped liquid absorbent 11 made of, for example, sponge or felt is fixed thereto.

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 to use self-fusion by heat and pressure without using any agent. In particular, the cleaning disk 2 made of this material has the feature that when a droplet of cleaning liquid (for example, trifluoroethane) is dropped, the cleaning disk 2 is uniformly spread 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 non-woven 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 adhesive strength is weak, and there is a fear that the collar portion 7 and the hub 5 may separate 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 indicates the area 10 impregnated with the cleaning liquid, and a wrapped area is formed between the area 10 and the area 10 impregnated with the cleaning liquid. The magnetic head is cleaned by moving the magnetic head back and forth in the radial direction of the disk 2 between the cleaning tracks T with respect to the cleaning disk 2 with which the magnetic head comes into contact. T1 indicates the innermost circumference of the cleaning track T, and T2 indicates the outermost circumference of the cleaning track T, 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 is designed. 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 sufficient cleaning liquid in the innermost circumference T1 side, the reduction in 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, trifluoroethane 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.

In this example, a cleaning disk with a penetration amount of about 11 mm is used, and the diameter of the injection hole 6 is set to about 1/3 (3.5 to 4.5 mm) of the penetration amount, thereby eliminating unnecessary Prevents overflow.

FIG. 7 is an enlarged sectional view of essential parts for explaining a magnetic head cleaning disk cartridge according to a second embodiment of the present invention.

This embodiment differs from the first embodiment as follows:
The inner diameter of the liquid absorbing liquid 11 is made slightly smaller than the diameter of the injection holes 6a, 6b, and 6c, and the inner circumference protrudes inside the injection hole 6, thereby improving the absorption of the cleaning liquid that is about to leak out. It is a point.

In addition, by pasting a film on the outer surface of the liquid absorbent 11 or by blinding the outer surface of the liquid absorbent 11 itself to make it smooth and eliminate liquid permeability, it is possible to hold it by hand or load it into a drive device. However, it can reduce the possibility of liquid adhering to other objects.

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

In the embodiment described above, the injection hole was provided at a position opposite to the magnetic head insertion port, but the present invention is not limited to this.
Preferably, it may be located anywhere other than the shutter movement area.

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 idea]

As mentioned above, the present invention provides a liquid absorbent around the outside of the injection hole, which immediately absorbs and retains the cleaning liquid that is about to spill out from the injection hole onto the cartridge case, so that it does not flow out onto the cartridge case. This eliminates the possibility of deteriorating the appearance or causing problems in handling.

Furthermore, if a hole for injecting the cleaning liquid is formed at a location other than the magnetic head insertion port as in the above embodiment, the cleaning disk cartridge filled with the cleaning liquid can be installed in the recording/reproducing apparatus.
There is a time lag between when the cleaning disk starts rotating and when the part impregnated with cleaning liquid and held there reaches the magnetic head, and the rotational torque of the disk increases during that time, which prevents the cleaning disk from starting. I've never had anything like that happen.

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

[Brief explanation of drawings]

1 is a plan view of a magnetic head cleaning disk cartridge according to a first embodiment of the present invention; FIG.
The figure is a plan view of a cleaning disk used in the cartridge, FIG. 3 is a cross-sectional view taken along the line - in FIG. 2, and FIG.
Figure 5 is a characteristic diagram showing the relationship between the basis weight of the cleaning disk and the amount of cleaning liquid permeated.
The figure is an enlarged sectional view of the vicinity of the injection hole of the magnetic head cleaning disk, FIG. 7 is an enlarged sectional view of the vicinity of the injection hole for explaining the second embodiment, and FIG. 8 is an enlarged sectional view of the vicinity of the injection hole of the magnetic head cleaning disk of the prior art. It is an exploded perspective view. 1...Cartridge case, 2...Cleaning disk, 3...Magnetic head insertion slot, 6a, 6
b, 6c...Injection hole, 10...Impregnation area, 11...
...Liquid absorption, O...Disk rotation center, R1, R
2, R3...Distance from the center of disk rotation.

Claims (1)

[Scope of utility model registration request] In 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 cleaning liquid is placed in the case. A magnetic head cleaning disk cartridge characterized in that an injection hole is provided for injection, and a liquid absorbent is provided around the outside of the injection hole.