JPS61294662A - Supporting mechanism for magnetic head - Google Patents

Abstract

PURPOSE:To reduce an impact force to a medium and shift from a track and to improve the follow-up performance of a head by setting rocking around an axis of rotation in the seek direction of the medium smaller than that around an axis of rotation perpendicular to the seek direction, for a head support means which is movable at right angles to the surface of a recording medium. CONSTITUTION:When a support arm 5 is lowered until it collides against a spot member 6, magnetic heads 7 and 8 are pressed against the medium 2 by a pressing member 12 with a proper pressing force. Even if the head 8 collides against the medium 2, its impact force is reduced by the vertical motion of the member 13 of a gimbals plate 11 to suppress the damage to the medium 2. Even if the medium 2 waves when moved at right angles to the seek direction, the member 13 and heads 7 and 8 move up and down following the medium 2 to suppress the damage to the medium 2. Further, even if the medium 2 waves, rocking motion around the axis of rotation perpendicular to the seek direction of the member 13 and heads 7 and 8 is suppressed by the member 14 to prevent the heads from shifting from a track.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a magnetic recording and reproducing device suitable for a magnetic recording and reproducing device in which recording and reproducing are performed while a magnetic head and a flexible planar magnetic recording medium (hereinafter referred to as media) are in contact with each other. This invention relates to a head support mechanism.

[Background of the invention]

In recent years, in order to increase the recording density of media, the magnetic layer of the media has been made approximately 1 μm, and the track width has also been increased from 100 to 2 μm.
As the magnetic head is becoming thinner to 00TP1, preventing damage to the magnetic layer due to the head sliding on the media surface and preventing deterioration of the magnetic head's ability to follow the media are extremely important issues that must be solved. It has become.

As a means to solve this problem, for example, as disclosed in U.S. Pat. A configuration is known in which the material is pressed against the surface. In this configuration, the positioning characteristics of the magnetic head with respect to the tracks of the media are extremely excellent, but during the recording or reproducing operation of the magnetic head, the ability to follow the undulations of the media is poor, and the positioning characteristics of one magnetic head relative to the other are poor. The magnetic head is struck through the media, and damage to the media cannot be avoided.

As a means for solving the above problem, as disclosed in Japanese Patent Publication No. 58-43826, one magnetic head is mounted on a gimbal plate that is pivotably supported with -degrees of freedom, and the other magnetic head is It is known to mount the device on a two-degree-of-freedom pivot-supported gimbal plate. In this configuration.

Although the gimbal plate has excellent followability to the media, there is a risk that the gimbal plate will vibrate out of plane and the vibration will damage the media.If an impact force is applied perpendicular to the media surface, the pivot There is a high risk of media damage.

As a means for solving the above problem, as disclosed in, for example, Japanese Patent Application Laid-open No. 51-124910,
A configuration in which a magnetic head is provided at the free end of a long leaf-spring arm is known. This configuration has disadvantages in that track deviation occurs due to media waviness and settling time is long.

[Purpose of the invention]

An object of the present invention is to address the drawbacks of the above-mentioned solutions, and to reduce the impact force on the medium during recording or reproducing operation of the magnetic head (hereinafter referred to as head loading), and to improve the ability of the magnetic head to follow the medium. To provide a magnetic head support mechanism which has excellent performance and can suppress track deviation.

[Summary of the invention]

The gist of the present invention is to provide a magnetic head support mechanism that holds a magnetic head in an operational relationship with one surface of a flexible planar magnetic recording medium, in which the magnetic head faces toward one surface of the medium or moves away from the surface of the medium. head support means movable as such and for pressing the magnetic head against a side of the medium with a force sufficient to maintain an intimate working relationship between the medium and the magnetic head; The head support means has a structure in which the swinging movement about the rotational axis in a direction perpendicular to the seek direction of the medium is set to be smaller than the swinging movement about the rotational axis in the seek direction of the medium. be.

As a result, it is possible to suppress the vibration of the magnetic head in areas where media track misalignment is likely to occur, and to suppress the vibration of the magnetic head in areas that have little effect on media track misalignment. It has excellent tracking performance and can prevent track misalignment, and since the magnetic head moves perpendicularly to the surface of the media, the impact force of the magnetic head on the media when loading the head can be kept to a minimum. .

[Embodiments of the invention]

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows an example of a magnetic head positioning device including a head support mechanism, in which magnetic heads are arranged on both sides of a medium.

In FIG. 1, a magnetic head positioning device 1 includes a carrier 3 provided slidably in the seek direction of a medium 2, a support arm 5 attached to the carrier 3 via a leaf spring 4, and a support arm 5. A blocking member 6 that prevents the medium 2 from moving more than a predetermined amount in a direction perpendicular to the surface of the medium 2, a first magnetic head 7 attached to the carrier 3, and a second magnetic head 8 attached to the support arm 5.

Head support means 9 for supporting the first magnetic head 7 on the carrier 3
and a head support means 10 for supporting the second magnetic head 8 on the support arm 5. The first magnetic head 7 and the second magnetic head 8 are placed facing each other with the medium 2 in between.

The head supporting means 9, 1o includes an asymmetrical gimbal plate 11 made of a thin plate spring material as shown in detail in FIG. A pressing member 12 that presses against the surface of.

As shown in FIG. 2, the gimbal plate 11 includes a first member 13 on which the first magnetic head 7 or the second magnetic head 8 is installed using an adhesive or the like, and both ends 13a and 13b of one side of the first member 13. It consists of a pair of second members 14.14a connected to and extending on both sides of the first member 13, and a third member 15 connected to the other ends of the second members 14, 14a. By fixing the frame-shaped third member 15 to the carrier 3 or the support arm 5 with an adhesive or the like, the gimbal plate 11 is fixed to the carrier 3 or the support arm 5. The pressing member 12 is made of a torsion spring, and one end of the pressing member 12 is a support piece 3a provided on the carrier 3.
The other end is pressed against the first member 13. The leaf spring 4 is fixed to the carrier 3 using screws 16. Covers 17 and 18 are provided around the first magnetic head 7 or the second magnetic head 8. The covers 17 and 18 also serve as a restraining member that restrains the gimbal plate 11 from approaching the media 2 more than a predetermined distance by the pressing member 12.

The covers 17 and 18 prevent the gimbal plate 11 from being significantly deformed by the pressing member 12 when the support arm 5 is rotated upward as shown in FIG.

The covers 17 and 18 have the function of reducing induced noise generated from the drive source by using electrically shielding materials.

The gimbal plate 11 is arranged to perform relative movement with the first Ta magnetic head 7 or the second magnetic head 8, and the direction of the relative movement and the second member 1.4.14.
In addition, the connection point (junction point) between the first member 13 and the second member 14° 14a is on the entrance side of the medium 2 with respect to the first magnetic head 7 or the second magnetic head 8 so that the extending direction of Arrange it so that

The pressing position of the pressing member 12 that presses the gimbal plate 11 is made to coincide with the position of the first magnetic head 7 or the second magnetic head 8 in the horizontal plane. The dimensions of the second members 14 and 14a and the pressing position of the pressing member 12 are set so that the displacement of the first magnetic head 7 or the second magnetic head 8 by the pressing member 12 is substantially parallel to the second member 15.

By bending the second member 14.14a, the gimbal plate 11 can have a large swing Q with the seek direction of the media 2 as the rotation axis Pi.
By making the horizontal width of a relatively large, the rotation axis P8 is pivoted in the direction perpendicular to the seek direction of the media 2.
can be set smaller than the swing Q.

The force with which the pressing member 12 presses the first magnetic head 7 or the second magnetic head 8 against the medium 2 is sufficient to maintain a close working relationship between the medium and the first magnetic head 7 or the second magnetic head 8. Set it to sufficient power. During head loading, the pressing force of the first magnetic head 7 and the second
This is done so that the pressing force of the magnetic head 8 is balanced.

The operation of the above embodiment during loading will be explained with reference to the schematic cross-sectional view of FIG. 4. First, the support arm 5 in the state shown in FIG.
When it is lowered until it collides with the blocking member 6, the fourth
It will be in the state shown in the figure. At this time, the first magnetic head 7 and the second magnetic head 8 abut against the meso-ear 2 with an appropriate pressing force by the pressing member 12 while facing each other. Further, even if the second magnetic head 8 collides with the media 2 by lowering the support arm 5, the impact force is not applied to the first member of the gimbal plate 11.
3 moves toward or away from one surface of the media 2, in other words, it moves up and down in a direction perpendicular to the surface of the media 2.

eased. Therefore, damage to the media 2 can be suppressed.

Furthermore, when the media 2 is moved in the arrow PJ force direction in FIG. The first magnetic head 7 and the second magnetic head 8 move in a direction substantially perpendicular to the surface of the medium 2 while following the medium 2, thereby preventing damage to the medium. Furthermore, even if the media 2 is undulated, the first member 13 of the gimbal plate 11, the first magnetic head 7 and the second
The swinging motion of the magnetic head 8 with its rotation axis perpendicular to the seek direction of the media 2 causes the second gimbal plate 11 to rotate.
Since this is suppressed by the functions of the members 14 and 14a, it is possible to prevent the media from mistracking.

5 to 7 show another embodiment of the present invention, and the same reference numerals as in FIGS. 1 to 4 indicate the same contents.

In the first embodiment shown in FIG. 5, the pressing member 12 for the first magnetic head 7 is removed, the rigidity of the gimbal plate 11 to which the first magnetic head 7 is attached is increased, and the pressing member 12 for the second magnetic head 8 is increased. It is designed to balance the pressure. Specifically, compared to the thickness of the gimbal @11 to which the second magnetic head 8 is attached.

The thickness of the gimbal plate 11a on which the first magnetic head 7 is attached is approximately 1.5 times as thick. In addition to increasing the thickness of the gimbal plate 11a, the rigidity can also be increased by increasing the width of each portion of the gimbal plate 11a. When the media 2 rotates, the second magnetic head 8
Since a pressing force of 10 to 20 g is applied by the pressing member 12, the first magnetic head 7 is balanced at a position sunk by 20 to 30 microns. Therefore, it is preferable to set the height of the entire magnetic head positioning device 20 to 30 microns higher. According to the first embodiment, one pressing member 12 can be removed.

Productivity improves.

In the second embodiment of FIG. 6, the two pressing members 12 are removed and the gimbal plate 11b on which the first magnetic head 7 is attached is provided.
The gimbal plate 11c to which the second magnetic head 8 is attached also functions as the pressing member 12. The first magnetic head 7 and the second magnetic head 8 are pressed against the media 2 by the reaction of the bending of the gimbal plate 11b and Lie. Note that the gimbal plates 11b and lie may be deformed to the media 2 side in advance to provide a desired elastic effect.According to the second embodiment, the production efficiency is further improved compared to the first embodiment. can improve sex.

In the third embodiment of FIG. 7, the pressing force of the pressing member 12 in the first embodiment of FIG. 5 may be applied to the support arm 5 instead of directly to the gimbal plate 11. In this case, it is necessary to balance the spring forces of the leaf spring 4, pressing member 12, and gimbal plate 11.

In the above embodiment of the present invention, the gimbal plates 11° 11a, l
lb, llc are all the first member 13, second member 14,
At least one gimbal plate of a pair of gimbal plates, in which the connection point 14a is disposed on the entrance side of the media 2, but is not limited thereto, is rotated by 180 degrees with respect to the media entrance direction. In addition, the relationship between the first magnetic head 7 and the second magnetic head 8 shown in each embodiment may be reversed, and the blocking member 6 may be added to the first magnetic head 7 side. .

〔Effect of the invention〕

The present invention provides a magnetic head support mechanism that holds a magnetic head in operational relationship with one surface of a flexible planar magnetic recording medium, in which the magnetic head is directed toward or away from one surface of the medium. head support means movable and for pressing the magnetic head against a surface of the medium with a force sufficient to maintain an intimate working relationship between the medium and the magnetic head; The means has a structure in which the swinging motion with the rotational axis in a direction perpendicular to the direction of the medium is set to be smaller than the swinging motion with the rotational axis in the seek direction of the medium, so that when the head is loaded, Thus, a magnetic head support mechanism is obtained which is capable of resisting impact force against the media, has excellent followability of the magnetic head with respect to the media, and can suppress track misalignment.

[Brief explanation of drawings]

1 to 4 show one embodiment of the present invention, FIG. 1 is a perspective view of the main part, FIG. 2 is an enlarged perspective view of the main part, and FIG. 8 is a vertical sectional view of the main part. FIG. 4 is a schematic explanatory diagram of the principle. 5 to 7 show other embodiments of the present invention. Fig. 5 is a longitudinal cross-sectional view of the main part showing another embodiment No. 1, Fig. 6 is a longitudinal cross-sectional view of the main part showing another embodiment No. 2, 7th 12th/2nd 3rd bamboo 3rd hard grass 4th day grass, 5″′ Item II 6th hard 7th hard/l＾ 3

Claims (1)

[Scope of Claims] 1. A magnetic head support mechanism that holds a magnetic head in operational relationship with one surface of a flexible planar magnetic recording medium, wherein the magnetic head faces one surface of the medium or the other surface thereof. head support means movable away from the medium and for pressing the magnetic head against a side of the medium with a force sufficient to maintain an intimate working relationship between the medium and the magnetic head; , the head support means has a configuration in which the swinging movement about the rotational axis in a direction perpendicular to the seek direction of the medium is set smaller than the swinging movement about the rotational axis in the seek direction of the medium. A magnetic head support mechanism characterized by: 2. The head support means includes a first member on which the magnetic head is installed, and a pair of second members connected to both ends of one side of the first member and extending on both sides of the first member; The magnetic head support mechanism according to claim 1, further comprising a third member connected to the other end of the second member. 3. The head support means includes a blocking member that prevents the third member from moving in a direction perpendicular to the surface of the medium during recording or reproducing operation of the magnetic head. A magnetic head support mechanism according to claim 2. 4. The magnetic head support mechanism according to claim 2, wherein the head support means includes a pressing member that presses the magnetic head against one surface of the medium. 5. The magnetic head support mechanism according to claim 1, wherein the head support means includes a restraining member that prevents the head support means from approaching the medium more than a predetermined distance. 6. The magnetic head support mechanism according to claim 2, wherein the first member, the second member, and the third member are formed from a single thin plate-like elastic member. 7. The magnetic head support mechanism according to claim 1, wherein the magnetic heads are disposed facing each other on both sides of the medium by means of the head support means. 8. The magnetic head is installed on one surface of the medium, and an elastic pad is installed on the other surface of the medium to face the magnetic head. Magnetic head support mechanism.