JPS62162273A - Magnetic head supporting mechanism - Google Patents

Abstract

PURPOSE:To previously prevent the generation of off-track by fitting an elastic member for pressing magnetic heads fitted to respective gimbal plates in a direction vertical to the surface of a flexible disk and providing at least one of the elastic members with an off-track preventing means. CONSTITUTION:A lower slider 13 applied pressing force with a prescribed load to the lower magnetic head 7 by a press spring 14 and supports the lower gimbal plate 11 by its leading contacts 13a, 13b and an upper slider 19 supports the upper gimbal plate 17 by its leading contact 19a. Since the lower gimbal plate 11 supports the lower magnetic head 7 through the two gimbal plate contacts 13a, 13b, the lower head 7 is not rotated even if the flexible disk 25 is shifted at its position in the vertical direction, and the upper magnetic head 9 is also kept at the parallel state with the head 7 by the pressing force of the magnetic head 9 side. Thus, the generation of off-track can be previously prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a magnetic head support mechanism, and more particularly, to a magnetic head support mechanism, and more particularly, to a magnetic head support mechanism, and more particularly, to a magnetic head support mechanism, a magnetic head support mechanism, and more specifically, a magnetic head support mechanism, and more specifically, a magnetic head support mechanism, and more specifically, a magnetic head support mechanism, and more particularly, a magnetic head support mechanism, and more specifically, a magnetic head support mechanism, and more specifically, a magnetic head support mechanism, and more specifically, a magnetic head support mechanism, and more specifically, a magnetic head support mechanism, and more specifically, a magnetic head support mechanism, and more specifically, a magnetic head support mechanism, and more specifically, a magnetic head support mechanism, and more specifically, a magnetic head support mechanism, and more specifically, a magnetic head support mechanism, and more specifically, a magnetic head support mechanism, and more specifically, a magnetic head support mechanism. The present invention relates to a magnetic head support mechanism of a magnetic recording/reproducing device that reads data.

[Background of the invention]

A magnetic recording and reproducing device that writes information on both the front and back sides of a flexible disk or reads information written on both the front and back sides of the disk is, for example,
It is shown in the publication No.-15866.

In the magnetic recording/reproducing apparatus having the above configuration, the magnetic head support mechanism is configured such that two magnetic heads sandwich both the front and back surfaces of the flexible disk. , it is possible to write twice as much information as a magnetic recording/reproducing device that writes information on one side of a flexible disk.

However, in conventional devices of this kind, one of the two magnetic heads is kept fixed, and the second magnetic head facing this magnetic head is mounted on the carriage via a gimbal plate. Because it is attached to the Herad arm.

When the second magnetic head loads the flexible disk, the first magnetic head, which is kept fixed, and the flexible disk come into contact with a relatively large force, and the mW generated at that time causes scratches on the flexible disk. Considerable care must be taken to prevent damage to the flexible disc or premature wear of the flexible disc.

In view of the above points, the present inventors mounted the first and second magnetic heads on the panpal plates, respectively, and located them on the back side of the pair of lugival plates.
A pivot is attached to each gimbal plate that elastically presses the magnetic head mounted on the flexible disk in a direction perpendicular to the surface of the flexible disk. Soften the shock.

An attempt was made to prevent scratches and early wear on flexible discs.

As a result, although good results were obtained in terms of preventing scratches and early wear of flexible discs,
On the other hand, if a positional shift occurs in the vertical direction of the flexible disk surface, the torsional rigidity of the gimbal plate on which the magnetic head is mounted is not very large, so the magnetic head rotates and off-track occurs. It was done.

[Purpose of the invention]

The present invention was made as a result of studies to solve the above-mentioned problems of the prior art, and its purpose is to write information on both the front and back sides of a flexible disk, or to write information on both the front and back sides of a flexible disk. In a magnetic recording/reproducing device that reads information written on a flexible disk, when a magnetic head loads the flexible disk, the ul
Not only can the flexible disk be prevented from being scratched or prematurely worn out by alleviating the ll, but also the occurrence of off-track can be prevented even if misalignment occurs in the vertical direction of the flexible disk surface. It is an object of the present invention to provide an improved magnetic head support mechanism.

[Summary of the invention]

In order to achieve the above object, the present invention provides a magnetic head support structure in which a pair of gimbal plates each having two magnetic heads mounted thereon are attached to a carriage so that the respective magnetic heads sandwich both the front and back sides of a flexible disk. In the mechanism, located on the back of the pair of gimbal plates mentioned above,
An elastic member is attached to each gimbal plate to press the magnetic head attached to the flexible disk surface in a direction perpendicular to the surface of the flexible disk, and at least one of the elastic members is provided with off-track prevention means. That is.

[Embodiments of the invention]

The present invention will be explained below based on an embodiment shown in FIGS. 1 to 5. FIG. A partially enlarged view of the figure, Figure 3 is a cross-sectional view of the entire magnetic recording and reproducing device,
FIG. 4 is a longitudinal cross-sectional view of FIG. 3, and FIG. 5 is a perspective view of the entire carriage indicated by reference numeral 3 in FIG.

In FIG. 3, which is a cross-sectional view of the entire magnetic recording and reproducing apparatus, and FIG. 4, which is a vertical cross-sectional view of FIG. 3, 1 is a chassis;
2 is a stepping motor; 3 is a carriage equipped with a magnetic head to be described later; 4a and 4b are guide shafts that slidably support the carriage 3;
The external shape is shown in Fig. 5 for easy understanding. In Figure 4,
5 is a disk drive motor attached to the bottom surface of the chassis 1; 6 is a cassette chamber that accommodates a disk cassette; the cassette chamber 6 includes a top plate 6a, a bottom plate 6b, and a side plate 6;
C, and the top plate 6a of the cassette chamber 6
Cassette guides 6a' and 6b' are connected to the lower plate 6b, respectively, and are located on the entrance side of the disk cassette. The carriage 3 is composed of a base member 8 on which a lower magnetic head 7 is attached, and a head arm 10 on which an upper magnetic head 9 is attached.
The bottom portions of the guide shafts 4a and 4b are slidably supported.

Here, the structure of the carriage 3 will be explained based on FIGS. 1 and 2. The lower magnetic head 7 is mounted on the lower gimbal plate 11, and the lower gimbal plate 11 is
It is adhesively fixed to a gimbal plate mounting portion 12 formed on the base member 8. The lower slider 13 is supported along a slider guide 8a connected to the base member 8, and a pressing force of a predetermined load is applied to the lower magnetic head 7 by a pressing spring 14.
and its tip contacts 13a and 13b.
supports the lower gimbal plate 11. A spring support member 15 that supports the push spring 14 is fixed to a slider guide 8a connected to the base member 8 via a screw 16. The upper magnetic head 9 is connected to the upper gimbal plate 17.
The upper gimbal plate 17 is adhesively fixed to a gimbal plate attachment portion 18 formed on the head arm 10. The upper slider 19 is supported along a slider guide 10a connected to the head arm 10, and a pressing force of a predetermined load is applied to the upper magnetic head 9 by a pressing spring 20.
and supports the upper gimbal plate by its tip contact 19a. A spring support member 21 that supports the push spring 20 is attached to the head arm 10 via a screw 22.
It is fixed to a slider guide 10a that is connected to the slider guide 10a.

Note that the head arm 10 has the upper slider 1 described above.
As is conventionally known, the upper magnetic head 9 is pressed against the vertical direction of the surface of the flexible disk 25 via a head pressing spring 23, a spring presser 24, etc.
It is designed to maintain a constant posture.

The present invention has the above-mentioned configuration.5 Next, the operation of the magnetic head support mechanism shown in the above embodiment will be explained.
In the above embodiment, on the back of the lower gimbal plate 11,
A lower slider 13 that elastically supports the lower magnetic head 7 via a push spring 14 is attached to the back of the upper gimbal plate 17, and a slider 13 that elastically supports the upper magnetic head 9 via a push spring 20 is attached. Top slider 19
is attached, when the upper magnetic head 9 loads the flexible disk 25,
The impact between the magnetic head 9 and the flexible disk 25 is caused by a push spring 2o that elastically supports the upper magnetic head 9.
At this time, the impact between the flexible disk 25 and the lower magnetic head 7 is also reduced by the magnetic force, and when the magnetic head 9 loads the flexible disk 25 with the head, the flexible disk 25 is prevented from being tinned or prematurely worn out. effectively prevented. In addition, in the above embodiment, the lower gimbal plate 11 connects the lower magnetic head 7 via the two gimbal plate contacts 13a and 13b.
Since the flexible disk 25 is supported in the vertical direction by pressure, the flexible disk 25 is kept in a parallel state with the lower magnetic head 7, thereby preventing the occurrence of off-track, which was observed in the prototype experiments conducted by the present inventors. When you are promoted to someone else, you can do it.

In the above embodiment, as an off-track prevention means, two gimbal plate contacts 13a and 13b which make point contact with the lower gimbal plate 11 are attached. 13
There is no problem in attaching b to the upper magnetic head support side, or both the upper magnetic head support side and the lower magnetic head support side, and the number of contacts that make point contact with the gimbal plate is limited to two. It is not something that will be done.

In addition, in the above embodiment, as an off-track prevention means, as described above, two contacts 13a and 1 and 3b which make point contact with the lower gimbal plate 11 are attached. Instead, as shown in FIGS. 6 and 7, a contact 13c that makes line contact with the gimbal plate 11 may be used, or a contact that makes surface contact with the gimbal plate 11 may be used. It's okay.

〔Effect of the invention〕

The present invention is as described above, and as is clear from the description of the illustrated embodiments, according to the present invention, information can be written on both the front and back sides of a flexible disk, or information written on both the front and back sides of the disk. In a magnetic recording/reproducing device that reads data, when a magnetic head loads a flexible disk, even if there is a misalignment between the magnetic head and the flexible disk, as well as in the vertical direction of the flexible disk surface, off-track can be prevented. It is possible to obtain an improved magnetic head support mechanism that can prevent the above problems.

[Brief explanation of drawings]

1 to 5 show one embodiment of the present invention, in which FIG. 1 is a vertical sectional view of the entire carriage 3 on which magnetic heads 7 and 9 are mounted, and FIG. 2 is a partially enlarged view of FIG. 1, and FIG. Figure 3 is a cross-sectional view of the entire magnetic recording and reproducing device, Figure 4 is a vertical cross-sectional view of Figure 3,
FIG. 5 is a perspective view of the entire carriage indicated by reference numeral 3 in FIG.
FIG. 7 is an enlarged perspective view of the gimbal plate contact shown at 13c in FIG. 3... Carriage, 7... Lower magnetic head, 8...
- Bay-entering member, 8a...Slider guide, 9...Upper magnetic head, 10...Head arm, 10a...Slider guide, 11...Lower gimbal plate, 12...
Gimbal plate mounting part, 13...lower slider, 13a
. 13b and 13c...lower gimbal plate contactor, 14
...Press spring, 15...Spring support member, 17...
Upper gimbal plate, 18...Gimbal plate mounting part, 19.
... Upper slider, 19a... Upper Jinjiru plate contactor. 20... Pressing spring, 21... Spring support member, 23...
・Head pressing spring, 24 ・Spring holder, 25 ・・
flexible disc.

Claims (1)

[Claims] A pair of gimbal plates equipped with one or two magnetic heads,
In a magnetic head support mechanism in which each magnetic head is attached to a carriage so as to sandwich both the front and back sides of a flexible disk, the magnetic head is located on the back side of the pair of gimbal plates and is attached to each gimbal plate. 1. A magnetic head support mechanism, characterized in that an elastic member is attached for pressing a magnetic head in a direction perpendicular to a surface of a flexible disk, and at least one of the elastic members is provided with off-track prevention means. 2. In the invention as set forth in claim 1, the magnetic head support mechanism wherein the off-track prevention means provided in the elastic member is constituted by a plurality of contacts that make point contact with the gimbal plate. . 3. The magnetic head support mechanism according to claim 1, wherein the off-track prevention means provided in the elastic member is constituted by a contact that makes line contact with the gimbal plate. 4. The magnetic head support mechanism according to claim 1, wherein the off-track prevention means provided in the elastic member is comprised of a contactor that makes surface contact with the gimbal plate.