JPS62267962A - Recording or reproducing device - Google Patents

Abstract

PURPOSE:To stabilize the flexible disk of the rotation time under non-contact state to anstabilizing member, to eliminate the rotation unevenness of a sheet and to stabilize the contact of a head and sheet by providing the slope for positive pressure generation that the head is inclining toward the relief bottom part in the vicinity of the head relief groove parts of the upper and down stream sides in the disk rotating direction of the stabilizing member. CONSTITUTION:At the time of rotation of a disk 1, a proper positive pressure is caused by a slope 51f at the upper stream side and at the downstream side, a positive pressure is caused by the slope 51d, so the disk is pressed to the direction apart from a stabilizing member 51, namely to the lower part in the figure, and the fear of the contact becomes eliminating at both the upper stream and downstream sides. And in this case, the positive pressure acts on the disk 1 at the part of the upper and lower stream both ends of the recessed groove part 51c of the disk 1, namely the vital part approximately of the deformation due to the projection of the head 4. In this way the prevention of the contact of the disk 1 and stabilizing member 51 can more effectively be achieved.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a recording or reproducing device that uses a flexible disk sheet as a recording medium, and in particular to a recording or reproducing device that uses an air flow generated by the rotation of the sheet to stabilize head touch. The present invention relates to a recording or reproducing device.

[Conventional technology]

In general, in the above-mentioned recording or reproducing apparatus, when a recording or reproducing head (hereinafter abbreviated as head) is brought close to a disk rotating at high speed, the airflow generated by the rotation of the disk causes the head and disk to face each other. This results in the disadvantage that the state cannot be kept stable and good, resulting in deterioration of recording or reproducing performance.

In order to solve this problem, in recent years a stabilizing member has been installed on the opposite side of the head with the disk in between, as will be explained later in FIG.
Efforts have been made to maintain a stable and good facing state between the head and the disk by causing the air flow generated by the disk not only between the head and the disk but also between the stabilizing member and the disk.

In Figure 6, l is a flexible recording medium.
A disk, for example a magnetic disk, has a center core 2 made of plastic, for example, attached to its center, and is attached to a spindle 3a of a disk rotation motor 3 in a center hole 2a of the center core 2, for example, as shown in FIG. It is rotated in the direction of arrow A inside at a predetermined speed (for example, 3.60 Or p m in the case of a still image recording or reproducing device). Reference numeral 4 denotes a recording or reproducing head, for example a magnetic head, which is supported by a head movable table 7 (FIG. 7). be moved. As a result, concentric or spiral recording tracks are formed on the recording surface of the disk 1 when recording signals. As mentioned above, reference numeral 5 denotes a stabilizing member which is provided in a relationship facing the head 4 with the disk 1 in between, for the purpose of stabilizing the portion of the disk 1 that passes through the head 4, and is shown in detail in FIG. As shown, in order to avoid collision with the head, the disk facing surface has a concave groove 5c having a rectangular cross section and a constant opening width in accordance with the moving path of the head 4 in the direction of arrow B in FIG. The disk facing surface has an upstream facing surface 5a and a downstream facing surface 5b with the concave groove portion 5C as a boundary in the rotational direction A of the disc l.
It is divided into two parts. Reference numeral 6 denotes a back plate provided as necessary, and has a long hole 6a, through which the head 4 projects toward the disk l side.

[Problems to be Solved by the Invention] As shown in FIG. On the other hand, the tip of the head 4 slightly protrudes into the concave groove 5c of the stabilizing member 5, or the head 4 has its tip slightly protruding into the groove 5c of the stabilizing member 5, or the head 4
The back plate 6 protrudes and faces the recording surface of the disk 1 so as to be at the same level as the stabilizing member 5.
The recording surface of the disc 1 is opposed to the recording surface of the disc 1 at a distance greater than that of the recording surface of the disc 1.

When the disk 1 is rotated in the direction of arrow A in such a state, the disk 1 is rotated due to the influence of the airflow accompanying the rotation of the disk 1.
A positive pressure is generated between the upstream facing surface 5a of the stabilizing member 5, and the disk 1 is pushed down in this area, while the
Negative pressure is generated between the disk 1 and the downstream facing surface 5b, and a phenomenon occurs in which the disk 1 is attracted toward the stabilizing member 5 against its rigidity.

As a result, as shown in FIG. 7, the downstream facing surface 5b of the stabilizing member 5 and the disk 1 tend to come into contact with each other, and when they come into contact, the stabilization of the opposing state between the head 4 and the disk 1 is inhibited. Further, a situation may occur in which the abrasive (for example, SiO2°TiO2, etc.) contained in the binder in the magnetic layer of the disk 1 causes scratches on the opposing surface 5b of the stabilizing member 5. Then, the abrasive that is separated from the disk 1 due to the contact and released is adsorbed to the scratches on the stabilizing member 5, which deteriorates the surface of the stabilizing member 5 and puts an abnormal load on the motor 3 that rotates the disk 1, causing the servo to malfunction. It may not work properly. In addition, the abrasive adsorbed on the stabilizing member 5 further promotes the peeling off of the abrasive contained in the binder in the magnetic layer of the disk l, which circulates around the vicinity of the head 4 and accelerates wear of the head 4. Situations may also occur.

All of these phenomena are caused by the contact between the disk 1 and the stabilizing member 5 caused by negative pressure.

The present invention has been made in view of the above circumstances, and it is possible to maintain the facing state between the head and the flexible disk in a stable and good manner by a simple means, and there is less risk of damage to the stabilizing member and the disk. It is an object of the present invention to provide a recording or reproducing device equipped with a stabilizing member.

SUMMARY OF THE INVENTION An object of the present invention is to provide a recording or reproducing device that can maintain a stable and good facing state between a head and a flexible disk by simple means, and can prevent damage to the stabilizing member and the disk. shall be.

[Means for solving problems]

In order to achieve such an object, the present invention includes a recording or reproducing head that is movable in the radial direction of a flexible disk, and is provided so as to face the head across the disk, and that moves according to the moving path of the head. In a recording or reproducing apparatus equipped with a disc stabilizing member having a concave groove portion, the stabilizing member has a disc stabilizing member that is located upstream of the concave groove portion of the stabilizing member in the rotational direction of the disk, and in the vicinity of the concave groove portion, facing toward the bottom of the concave groove portion. A slope that slopes toward the bottom of the groove was provided on the downstream side and in the vicinity of the groove.

[Effect]

With this configuration, a predetermined level of positive pressure is generated by the upstream and downstream inclined portions near the groove portion of the stabilizing member, thereby stabilizing the distance between the head and the sheet.

〔Example〕

First, FIG. 1 shows the disk facing surface of the stabilizing member in an embodiment of the present invention viewed from diagonally above, and FIG. 2 shows the stabilizing member installed in the device. In the figure, arrow A indicates the direction of rotation of the disk 1, and arrow C indicates the direction of the center core 2.

The stabilizing member 51 shown here is located near the concave groove 51c on the upstream side in the rotational direction of the disk l with the concave groove 51c for allowing the head 4 to escape.
Here, a slope 51 for generating positive pressure is adjacent to the concave groove portion 51c.
f along the upstream ridgeline 51g and the concave groove portion 51c.
It is installed so that it is inclined towards. On the other hand, on the downstream disk facing surface 51b, there is a slope 5 for generating positive pressure near the groove 51c, that is, in this case, adjacent to the groove 51c.
1d along the downstream ridgeline 51e and the concave groove portion 51
It is provided so as to be inclined towards c. Slope 51f
In order to generate an appropriate level of positive pressure between the portion of the disk 1 that passes through the slope 51f when the disk 1 rotates in the direction of the arrow, and to prevent contact with the disk, the second
As shown in the figure, the portion of the disk 1 that passes through the slope 51f has a substantially required acute angle in its traveling direction, that is, an acute angle that allows the required positive pressure to be obtained at a predetermined rotational speed of the disk 1. It is formed with a predetermined inclination angle based on the deformed shape of the portion of the disk l that passes through the slope 51f so as to achieve the following.

Similarly, the slope 51d has a second
As shown in the figure, the portion of the disk 1 that passes through the slope 51d is formed at a substantially required acute angle in its traveling direction, that is, an acute angle that allows the required positive pressure to be obtained at a predetermined rotational speed of the disk 1. It is formed with a predetermined inclination angle based on the deformed shape of the portion of the disk 1 that passes through the slope 51d.

According to the stabilizing member 51 having the above structure, when the disk l rotates in FIG. 2, appropriate positive pressure is generated by the slope 51'' on the upstream side, and positive pressure is generated by the slope 51d on the downstream side. , the disk is pressed downward in the figure, that is, in a direction away from the stabilizing member 51, and the fear of contact on both the upstream and downstream sides is eliminated.In this case, the positive pressure is applied to the top of the concave groove 51c of the disk l. - Since it acts on the disk 1 at both ends on the downstream side, that is, at the almost critical point of its deformation due to the protrusion of the head 4, it becomes possible to more effectively prevent contact between the disk 1 and the stabilizing member 51. .

FIG. 3 shows a disk-facing surface of a stabilizing member according to another embodiment of the present invention, viewed obliquely from above.

If positive pressure is to be more actively obtained on the upstream side in the disk rotational direction, the entire upstream disk facing surface may be configured with a slope 52f for generating positive pressure, as shown in FIG.

As another embodiment, as shown in FIG. 4, a head escape groove 5 is formed so that the opening width on the disk center side, that is, in the direction of arrow C, is larger than the opening width on the disk outer circumferential side.
3c as well, by providing an inclined surface 53f for generating positive pressure on the upstream side, positive pressure can be positively obtained on the upstream side. In this case, even if the disk is subjected to uneven tension by the center core, a stable gap between the disk stabilizing members can be obtained on both the inner and outer circumferences of the disk.

In addition, as shown in Fig. 5, in order to make the force due to positive pressure on the downstream side approximately equal on the inner and outer circumferential sides of the disk, it is configured so that it becomes thicker toward the C direction, and the upstream side An inclined surface 54f may be provided.

〔effect〕

As explained above, by providing a slope for generating positive pressure that slopes toward the bottom of the head relief in the vicinity of the head relief groove on the downstream side in the direction of disk rotation of the stabilizing member, the flexible disk can be stabilized during rotation. This has the effect of stabilizing the head without contacting the stabilizing member, eliminating uneven rotation of the sheet, and stabilizing the contact between the head and the sheet.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the stabilizing member of the present invention, FIG. 2 is a longitudinal sectional view showing an embodiment of the vicinity of the head of the present invention,
3, 4, and 5 are perspective views showing other embodiments of the present invention, FIG. 6 is a perspective view showing an embodiment of a recording device using a conventional stabilizing member, and FIG. 7 is a perspective view showing another embodiment of the present invention. FIG. 2 is a longitudinal cross-sectional view of the vicinity of a head of a recording device using a conventional stabilizing member. 51 is a stabilizing member, 6 is a back plate, l is a flexible disk, and 4 is a head. 100 30 zf Ji LA solid 3e 5i C 'hc

Claims (1)

[Claims] A recording or reproducing head movable in the radial direction of a flexible disk, and a disk stabilizing member provided to face the head with the disk interposed therebetween and having a concave groove portion corresponding to the movement path of the head. In the recording or reproducing device, a slope inclined toward the bottom of the groove is provided on the upstream side of the groove of the stabilizing member in the rotation direction of the disk and in the vicinity of the groove, and on the downstream side and in the vicinity of the groove. A recording or reproducing device characterized in that a slope inclined toward the bottom of the groove is provided near the groove.