JPH02276014A - Cleaning unit for floppy disk device - Google Patents

Abstract

PURPOSE:To easily and surely clean a floppy disk device by arranging a cleaning member only in the magnetic head inserting aperture of a jacket. CONSTITUTION:A cleaning aperture part 1c conforming to the magnetic head inserting aperture part is possessed, and a cleaning felt 6 to be the head cleaning member applied with a cleaning agent possesses a larger dimension than the aperture part 1c by a pressing marging. Further felt pressing plates 7 and 9 has a shape extended in the tangent direction of the rotation of the recording medium, a part corresponding to the center part of the cleaning aperture part 1c is bent and expanded on a magnetic head 11 side. In addition, by moving the head 11 or a pad 12 on the cleaning member 6 provided at the head inserting aperture part in the access direction, the floppy disk device is cleaned. Thus usability is improved, and the magnetic head 11 and upper and lower pads (negative pressure pad) 12 can be surely cleaned.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cleaning device for a floppy disk device, and more particularly to a cleaning device for cleaning a magnetic head and a pad device of a floppy disk device.

[Prior Art] In recent years, magnetic recording and reproducing devices have rapidly become more reliable and faster, and the magnetic heads and pad devices used in these devices are in contact with the magnetic recording medium for longer periods of time. , now used for sliding. Therefore, magnetic powder or dust may adhere to the magnetic head or pad device, and the magnetic powder or dust may damage the magnetic recording medium, or there may be magnetic powder or dust interposed between the magnetic head and the magnetic recording medium. A spacing loss occurs, and the electromagnetic conversion characteristics are greatly deteriorated, resulting in a decrease in the reliability of recording and reproduction. Therefore, a device for cleaning these magnetic powders and dust becomes indispensable.

Proposals regarding the cleaning device have already been made, but the one disclosed in Japanese Patent Publication No. 60-34183 is a device in which a cleaning means having a wet cleaning pad is provided inside a magnetic disk processing device. Furthermore, the one disclosed in Japanese Utility Model Application Publication No. 62-153607 is a magnetic disk for cleaning, which has a recording medium part 60a as shown in FIG. The disk-shaped magnetic medium 60 has a head cleaning portion 60b coated with the following.

[Problems to be Solved by the Invention] However, the above-mentioned Japanese Patent Publication No. 60-34183 provides a cleaning means for a magnetic disk processing device, which is a magnetic recording and reproducing device, so it cannot be used, for example, in an electronic still camera. This is not appropriate for equipment that needs to be compactly packed, such as a device, as there is no space for it.

Furthermore, during cleaning, the user must dispose of the cleaning liquid, which is not practical.

On the other hand, cleaning in the case of the device disclosed in Japanese Utility Model Application Publication No. 62-153607 is performed by inserting a cleaning magnetic medium 60 into a magnetic recording/reproducing device and rotating the medium 60 while making contact with a magnetic head. . However, when this is applied to a magnetic recording/reproducing device for a 2-inch floppy disk used in an electronic still camera, this device usually uses a negative pressure pad to bring the traveling medium into close contact with the magnetic head surface. It is used.

As described above, this cleaning medium 60 has an abrasive material coated on the surface of the head cleaning section 60b. Compared to the material of ordinary recording media, its surface condition is also different.
Also, flexibility is reduced.

Therefore, it becomes difficult to generate negative pressure in the negative pressure pad, and it becomes difficult for the cleaning portion 60b of the cleaning medium 60 to travel in close contact with the magnetic head, resulting in incomplete cleaning action.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an object of the present invention is to provide a cleaning device for a floppy disk device that is easy to use and can reliably clean the magnetic head and the upper and lower pads (negative pressure pads). .

[Means and effects for solving the problems] The cleaning device for a floppy disk device of the present invention is characterized in that a cleaning member is disposed only in the head insertion opening of the disk jacket, Cleaning is performed by moving the head or pad in the access direction over a cleaning member disposed in the head insertion opening.

[Example] The present invention will be explained below with reference to illustrated embodiments.

1 to 3 show a cleaning device for a floppy disk device (hereinafter referred to as a cleaning device) showing a first embodiment of the present invention. This cleaning device 15 is an example used for a 2-inch floppy disk device used in an electronic still camera, etc., and has a cleaning opening IC corresponding to an opening for inserting a magnetic head, and has a general external shape. jackets 1a and 1b having the same dimensions as the jacket of a 2-inch floppy disk for an electronic still camera; a chucking spring portion 2a; and a center hub 2 for positioning the cleaning felt 6;
a shutter 5, a cleaning felt 6, which is a head cleaning part disposed on the top surface of the cleaning opening IC, supported by a felt support part 1d of the jacket b, and coated with a cleaning agent to be described later; Both ends of the magnetic head 11 in the access direction of No. 6 are independently pressed in the direction of the magnetic head 11, and one end is attached to the jacket 1a with a screw 8. It is composed of two felt presser plates 7 and 9 screwed together with IO.

Note that the cleaning opening IC has a size a of the magnetic head window HW, which is the magnetic head insertion opening of a normal floppy disk case, as shown in FIG. 2-3.
The cleaning felt 6 has a positional shape that includes i x b 1, and the cleaning felt 6 has a size larger than the opening IC by the pressing distance.

Further, the felt pressing plate 7.9 has a shape extending in the tangential direction of the rotation of the recording medium, and a portion corresponding to the center of the cleaning opening IC is distorted and bulged toward the magnetic helad 11 side. . Note that the felt presser plates 7 and 9 may be constructed using wire such as piano wire.

The cleaning agent applied to the felt 6 is, for example, silicon nitride 513N4. Titanium oxide TiO Silicon dioxide S jO2r Alumina 2' A, Q O Boron carbide B4C etc. engineering 2 3
'' A material such as ceramics that improves the cleaning effect due to the friction between the felt 6, the magnetic head 11, and the negative pressure pad 12, and does not cause wear of the magnetic head 11 is selected. It is necessary to select an abrasive quality that does not generate dust due to the friction of the access movement of the magnetic head.

Note that this cleaning device 15 has a jacket l.
By making the external shapes of a and lb match the 2-inch floppy disk as described above, by making the center hub 2 the same size, and by making the felt presser plates 7, 9, etc. in a shape that does not protrude outward from the jacket, It must be able to be inserted into the applicable floppy disk device.

Next, the operation of the cleaning device 15 of the first embodiment configured as above will be explained. First, when the cleaning device 15 is inserted into a floppy disk device whose magnetic head and negative pressure pad are to be cleaned, the cleaning felt 6 comes into contact with the magnetic head 11 and the negative pressure pad 12 (see FIG. 2 (B7)). In this state, the magnetic head 11 of the floppy disk device is accessed over the entire access range X.

(See Figure 3). Due to this access movement, the magnetic spatula 11 or the negative pressure pad 12 slides into contact with an appropriate pressing force due to the elasticity of the cleaning felt 6, thereby cleaning. In this case, the contact force is not dependent on the suction force of the negative pressure pad 12, but is due to the pressing force of the felt 6, so that magnetic powder and dust attached to the surface of the magnetic pad 11 and the surface of the negative pressure pad 12 can be removed. It will definitely be done. In addition, since the effective cleaning surface of the cleaning felt 6 is the same size as the opening 1c, which is not narrower than the head window HW, the magnetic head 11 can be moved over the entire access range as described above, resulting in efficient cleaning. can be done.

The upper surface of the cleaning felt 6 and the magnetic helad 11
On the opposite side, the felt pressing plate 7.9 presses both end surfaces of the felt as described above, and only the felt 6 is exposed in the portion corresponding to the dimensions a IX b J of the head window HW. (See Figures 2 and 3). Therefore, even if the floppy disk device is equipped with an upper pad, the above-mentioned cleaning operation will not cause problems such as damage to the upper pad.

Next, a cleaning device according to a second embodiment of the present invention will be explained with reference to FIGS. 4.5.6. In the cleaning device of this embodiment, whereas the cleaning felt 6 of the first embodiment is fixed, the rotation of the spindle 55 is controlled by a displacement conversion mechanism using an eccentric cam 21b and a vibrating frame 24. 29 is given relative movement with respect to the jacket, and the cleaning is performed by the vibration.

The structure of this cleaning device includes a jacket (not shown) having the same external dimensions as the jacket of a 2-inch floppy disk in which the entire device is housed, a chucking spring 21a, a PG yoke 22, and an eccentric cam 21b for vibration.
a center hub 21 which integrally has a center hub 21 which is loosely supported by the jacket; a support hole 24a is pivotally supported by a pin 30a fixed to the jacket, and a driven drive driven by the eccentric cam 21b; The magnetic head 1 has a portion 24b.
A vibrating frame 24 having an opening for cleaning in the part accessed by the vibrating frame 24, a cleaning felt 29 disposed on the opening of the vibrating frame 24, and a cleaning felt 29 screwed onto the vibrating frame 24 with screws 26 and 28. felt presser plates 25 and 27 that press the felt 29, and the driven frame 2 of the vibrating frame 24.
Spring 31 for pressing and following the eccentric cam 21b
and the protrusion 24 of the vibrating frame 24 which is a spring guide for the spring 31.
c and a protrusion 30b provided on the jacket.

Note that this cleaning device also has an external shape similar to that of the vibrating frame 24.
The external size of the floppy disk shall not be larger than that of a 2-inch floppy disk. Regarding the cleaning section, in order to prevent interference, the cleaning opening has a width C2 in the vibration direction of the head window HW mentioned above, which is the dimension b1 in Fig. 3.
It is set larger by the amplitude.

Regarding the material of the cleaning felt 29, since the felt 29 itself is used for cleaning while vibrating, a material that generates less dust due to friction than the felt 6 used in the first embodiment is selected, which has a negative impact on the floppy disk device. It is necessary to avoid giving

In addition, since this cleaning device is used by rotating the center hub 21, the center hub 21 is equipped with a PG joke 2.
is installed. This center hub 21 is shown in FIG.
In the example shown in ), there is only one PG yoke, which rotates at the same speed as during normal recording and reproduction. However, if it is necessary to lower the frequency of the vibration frame 24 for cleaning purposes, by adding two or three PG jokes 2, the vibration period can be changed without changing the drive circuit of the floppy disk device. can.

That is, the output pulse of the PG sensor (not shown) due to one PG joke 2 is as shown in FIG. 5(A).
One pulse is output per rotation of the center hub 21, and the speed of the spindle is controlled by the period T. However, when two PG jokes 2 are provided, one pulse is output every half rotation of the center hub 21 as shown in FIG. Rotation is obtained and the vibrating frame also vibrates slowly.

Regarding other structures, for example, cleaning felt 2
9 and the shapes of the felt presser plates 25 and 27 are the same as those of the first embodiment, so a description thereof will be omitted.

The operation of the cleaning device of the second embodiment configured as above will be explained. First, when this cleaning device is inserted into a corresponding floppy disk device, the center hub 21 is fitted into the spindle 55 of the floppy disk device. When the spindle 55 is rotated, the cleaning felt 29 of the vibrating frame 24 vibrates in the direction Y shown in FIG.

Further, the magnetic head 11 and the negative pressure pad 12 are also caused to reciprocate in the access direction X at the same time. On the other hand, to explain the adhesion state of magnetic powder and dust, as shown in Figure 6,
a on the magnetic helad 11 with respect to the sliding direction Z of the recording medium
It often adheres to the shoulder portion of the negative pressure pad 12, or at a shoulder portion such as portion b on the negative pressure pad 12. Therefore, the head]. If the felt 29 is vibrated not only in the access direction X of 1 but also in the vibration direction Y as described above, a more effective lining effect can be achieved.

Regarding the frequency of vibration of the vibrating frame 24, the rotational speed of the recording medium during normal recording and reproduction is 3600 rpm, and if this speed is too fast for the cleaning operation, the PG joke Two numbers of 2,
Or by adding more vibration frames 24
It is possible to vibrate slowly to further enhance the cleaning effect.

In the cleaning device of this second embodiment, since the felt 29 vibrates relative to the jacket,
Upper pad (not shown) pressed against the upper surface of the felt 29
It also has a remarkable effect on cleaning.

Next, the cleaning device of the third embodiment of the present invention is of a wet cleaning type, and its configuration is similar to that of the second embodiment, as shown in FIG. Cleaning is performed by moving the cleaning member relative to the jacket using a conversion mechanism.

The structure of this cleaning device includes a jacket (not shown) having the same external dimensions as the jacket of a 2-inch floppy disk in which the entire device is housed, a chucking spring 41a, a PG yoke 42, and a plurality of cam protrusions for excitation. A center hub 41 integrally has a cam 41b having a cam 41c and a cam recess 41d, and is supported loosely by the jacket, and a support hole 43c is pivotally supported by a pin 44 fixed to the jacket, Driven pins 43d, 43e and drive arms 43a, 43 driven by the cam 41b
b, a vibrating frame 43 having an opening 43f for cleaning in a portion accessed by the magnetic head 11, and a cleaning felt 4 disposed over the opening of the vibrating frame 43.
9, and screws 46, 48, 46', 48' to the vibration frame 43.
felt presser plates 45, 47 which are screwed together and press the felt 49, and the driven pin 43d of the vibrating frame 43.

Spring 5 for causing 43e to follow cam 41b without play
1a, 51b and spring guides for the springs 51a, 51b, and projections 50a, 50b fixed to the jacket.
It is made up of.

Note that this cleaning device also has an external shape similar to that of the vibrating frame 43.
It shall not be larger than the external size of a 2-inch floppy disk, including the Regarding the cleaning section, in order to prevent interference with the cleaning opening, the width c3 in the vibration direction is set to be larger than the dimension b1 in FIG. 3 by the amplitude with respect to the above-mentioned head window HW.

Further, since this cleaning device is used by rotating the center hub 41, the center hub 41 is provided with a PG yoke. The fact that the period of vibration is changed depending on the number of PG jokes 2 is the same as in the second embodiment, so the explanation will be omitted.

Additionally, a cleaning felt 49 is attached to the vibrating frame 43.
Since this is for a wet type, a frame portion 43h for preventing the solvent from scattering is provided around the entire supporting portion of the felt 49. In addition, it has a supporting portion 43g with a step (=J) for holding the felt 49.Furthermore, the felt holding plates 45 and 47 hold the felt 49.
9 is a wet type, and because it is necessary to support its weight, it is fixed with two screws 46, 46' or 48, 48', and the felt 49 is pressed by two protruding parts 45a or 47a, respectively. and holds it.

The operation of the cleaning device of the third embodiment configured as described above will be explained, omitting the parts common to the cleaning device of the second embodiment. The cleaning device of the third embodiment is characterized by being a wet type as described above, and the cleaning is performed by impregnating the felt 49 with alcohol or fluorinated ethylene as a solvent, which is more superior to dry cleaning. This provides a good cleaning effect.

To explain the vibration operation for cleaning of this cleaning device, the vibration frame 43 is driven by a cam 41b, and a plurality of protrusions 41c provided on the cam 41b.
The frequency and amplitude of the vibration are determined by the recess 41d. Further, as in the second embodiment, the number of rotations of the center hub 41 can be reduced by increasing the number of PG jokes 2 disposed on the center hub 41. In this way, the frequency and amplitude of the vibration frame are determined by the cam 41b and the PG joke 2, and the frequency and amplitude are determined not only by the cleaning effect of the felt 49 but also by taking into account the resonance point of the vibration system of the vibration frame 43. It is necessary to determine the for example,
Either set the frequency to be lower than the resonance point and increase the amplitude to a certain extent to obtain a noticeable cleaning effect, or set the frequency to exceed the resonance point.
Whether the cleaning effect is improved by slightly vibrating the amplitude or not is decided based on a comprehensive judgment that also takes into account the effect on the floppy disk device.

Note that also in the cleaning device of this third embodiment,
As shown in FIG. 7(A), a space is provided between the felt presser plates 45 and 47 in which the upper pad 52 can be pressed, so that the upper pad 52 can be cleaned at the same time.

[Effects of the Invention] As described above, according to the cleaning device of the present invention, the cleaning device has a shape that conforms to the external dimensions of the jacket of the recording medium, and furthermore, a presser plate is provided in the head window portion that is the insertion opening for the magnetic head. (i) The cleaning device can be handled in the same way as a floppy disk jacket, and cleaning can be performed easily.

(ii) Since the felt is forced to slide against the cleaning surface without depending on the action of the negative pressure pad, cleaning is performed reliably.

(＋＋＋ ＞Since the head window is used, cleaning can be performed in the entire access range of the magnetic head, and
The upper pad can also be cleaned.

(1v) It is also possible to perform more effective cleaning by utilizing the rotational force of the spindle.

It is possible to provide a cleaning device for a floppy disk device that provides many remarkable effects such as the following.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a cleaning device for a floppy disk device showing a first embodiment of the present invention, FIG. 2(A),
(B) is a front view of the main part of the cleaning device shown in FIG. 1 and a sectional view taken along line DD in FIG. Figures 4(A), 4(B), and 4(C) each show a cleaning device for a floppy disk device according to a second embodiment of the present invention; A) is E- in Figure 4 (13)
E sectional view, FIG. 4(B) is a main part front view, FIG. 4(C) is a FF sectional view in FIG. 4(B), and FIGS. 5(A) and (B) are The output waveform of the PG sensor during one rotation of the disk of the cleaning device shown in Fig. 4 is shown, and Fig. 5 (A) shows the output waveform of the PG sensor when there is only one PG yoke.
B) is a waveform diagram in the case of one or two PC yokes, Figure 6 (A)
, (B) is a front view of the main parts showing the state of adhesion of magnetic powder, etc. on the magnetic head and negative pressure pad of a 2-inch floppy disk device, and a sectional view taken along line H-H in the same front view. ), (B) is a front view of main parts of a cleaning device showing a third embodiment of the present invention, and a cross-sectional view taken along line GG in the front view; FIG. 8 is a front view of a conventional cleaning magnetic disk. It is. IC......Cleaning opening (opening for head insertion) 6...Cleaning felt (cleaning part)

Claims (2)

[Claims] (1) A cleaning device for a floppy disk device, characterized in that a cleaning member is disposed only within the magnetic head insertion opening of the disk jacket. (2) The floppy disk drive according to claim 1, wherein the cleaning member is supported by a displacement conversion mechanism for performing relative movement with the disk jacket body based on the driving force of a spindle motor of the floppy disk device. Cleaning device for disk devices.