JPS6278765A - Recording and reproducing device for flexible magnetic sheet - Google Patents

Abstract

PURPOSE:To prolong the lifetime of both magnetic sheet and magnetic head by providing a control member having a slide contact part at the front or back side of the rotational direction of a flexible magnetic sheet against the slide contact part of a stabilizing member centering on the position of the magnetic head. CONSTITUTION:A magnetic head 4 is held between a stabilizing member 1 and a control member 2 via the upper and lower surface sides of a magnetic sheet against the radium direction of this sheet 3. Then the spaces between the upstream and downstream stabilizing parts 1a and 1b of the slide contact part of the stabilizing member 1 set on the upper surface side of the sheet 3 is smaller than the space between the upstream and downstream control parts 2a and the 2b of the slide contact part of the control member 2 set on the lower surface side of the sheet 3. Thus a stable head touch is secured by the member 1 and the deflection of the sheet 3 is suppressed by the member 2. Therefore the push-in degree of the member 1 and the projection degree of the member 2 can be reduced. This decreases the flaws on the sheet 3, thereby prolonging the lifetime of both sheet 3 and head 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a flexible magnetic sheet recording and reproducing device that records and reproduces signals by rotating a flexible magnetic sheet and bringing a magnetic head into contact with the flexible magnetic sheet.

[Technical background of the invention and its problems]

2. Description of the Related Art In recent years, so-called electronic still cameras, which capture images using a solid-state image sensor or the like and record them as still images in a memory, have been attracting attention. In this electronic still camera, a flexible magnetic sheet is generally used as the image memory. Magnetic sheets have a larger storage capacity than semiconductor memories, but due to the demands for improved image quality and miniaturization of electronic still cameras, it is desired that they have a high recording density so that sufficient capacity can be obtained with smaller diameter sheets.

In order to increase the density of magnetic recording, it is required that the sliding contact between the magnetic head and the magnetic sheet be extremely stable and good.

Therefore, a flexible magnetic sheet recording and reproducing apparatus as shown in FIGS. 8 and 9 has been proposed. 8 and 9, a magnetic head 4 is provided with a magnetic sheet jacket in which a magnetic sheet 3 is housed in a flat package 7,
The magnetic sheet 3 is sandwiched between a stabilizing member 1 provided on the opposite side of the magnetic head 4.

This stabilizing member 1 has a pair of opposing surfaces facing the magnetic sheet 3 at positions facing forward and backward in the rotational direction of the magnetic sheet 3 with the position of the magnetic head 4 as the center. 3 is sandwiched between these opposing surfaces and the magnetic head 4 and rotates.

However, when this stabilizing member 1 is provided, when the stabilizing member 1 is pushed in, the surface runout of the magnetic sheet around the stabilizing member 1 is large, which may affect the head touch. Furthermore, in order to suppress the magnetic sheet surface runout, the stabilizing member 1 has to be pushed strongly;
In addition to increasing running scratches that occur on the magnetic head 4,
This results in faster wear.

Furthermore, as shown in FIG. 10, it has been proposed to provide a regulating member 2 at a position opposite to the stabilizing member 1 to improve head touch, but it is difficult to adjust the height of the regulating member 2 and assembly is difficult. This has the disadvantage that it is not only difficult, but also that the torque for rotating the magnetic sheet 3 becomes large.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and provides a flexible magnetic sheet recording and reproducing device that suppresses surface runout of a magnetic sheet, stabilizes head touch, and reduces the risk of shortening the life of the magnetic sheet and magnetic head. The purpose is to provide.

[Summary of the invention]

In order to achieve the above object, the present invention includes a spindle to which a flexible magnetic sheet is attached and rotates around a predetermined axis; a head, and a slide that is provided with a flexible magnetic sheet sandwiched between the magnetic head and comes into contact with the flexible magnetic sheet on the front side and the rear side in the direction of rotation of the flexible magnetic sheet around the position of the magnetic head. A stabilizing member having a contact portion, and a readable magnetic sheet sandwiched between the stabilizing member and the stabilizing member, and rotation of at least the flexible magnetic sheet relative to the sliding contact portion of the stabilizing member around the position of the magnetic head. Provided is a flexible magnetic sheet recording/reproducing device characterized by comprising a regulating member having a sliding contact portion on the front side in the rotational direction or on the rearward side in the rotational direction.

[Embodiments of the invention]

The present invention will be described in detail below with reference to the drawings.

In FIGS. 1 to 4, a flexible magnetic sheet 3 housed in a flat package 7 is attached to a spindle 5 and rotates at a predetermined rotational speed in the direction of the arrow.

A stabilizing member 1 for obtaining a stable sliding contact state between the magnetic sheet 3 and the magnetic head 4 during high-speed rotation includes a pair of sliding contact portions facing the magnetic sheet 3 and an upstream side with the position of the magnetic head 4 as the center. It has a stabilizing section 1a and a downstream stabilizing section 1b. The stabilizing member 1 is attached to the apparatus main body so as to be in sliding contact with the magnetic sheet 3 on the opposite side of the magnetic head 4, and the regulating member 2 is attached so as to be in sliding contact with the magnetic head 4 side.

At this time, the upstream stabilizing part 1a and the downstream stabilizing part 1b are arranged such that the stabilizing member l comes into sliding contact with the magnetic sheet 3 in the radial direction of the magnetic sheet 3 at an interval narrower than the sliding contact interval of the regulating member 2. and the interval between the upstream regulating section 2as and the downstream regulating section 2b.
The interval is determined.

In this way, the stabilizing member 1 and the regulating member 2 are located at positions such that the magnetic head 4 is sandwiched between the upper and lower surfaces of the magnetic sheet 3 in the radial direction of the magnetic sheet 3.

The distance between the sliding contact part of the stabilizing member 1 on the upper surface of the magnetic sheet 3, the upstream stabilizing part 1a, and the downstream stabilizing part 1b is determined by the sliding contact part of the regulating member 2 on the lower surface of the magnetic sheet 3, the upstream regulating part 1b, and the upstream stabilizing part 1b. Part 2
By making the distance narrower than the distance between the stabilizing member l and the downstream regulating part 2b, a more stable head touch is ensured by the stabilizing member l,
The regulating member 2 suppresses the surface runout of the magnetic sheet 3.

As a result, the stabilizing member 1 needs to be pushed in only a small amount or the regulating member 2 needs to protrude only a little, which leads to a reduction in scratches that occur on the magnetic sheet 3 and extends the lifespan of the magnetic sheet 3 and the magnetic head 4. .

[Other embodiments of the invention]

Next, FIG. 5 shows a second embodiment of the present invention.

In FIG. 5, the upstream regulating part 2a1 and the downstream regulating part 2b of the regulating member 2 can be adjusted in position by adjusting screws 9 wound in opposite directions to widen or narrow the contact interval in the direction of rotation of the magnetic sheet 3. is being done. At this time, by changing the interval between the contact portions, the homogeneous A property of the magnetic sheet 3 changes little by little. As a result, the contact force between the magnetic head 4 and the magnetic sheet 3 is changed, and the magnetic head 4
By installing , it is possible to suppress the position where the surface runout is greatest without changing the position.

Next, FIG. 6 shows a third embodiment of the present invention.

Generally, the upstream side of the magnetic sheet 3 tends to have larger surface runout than the downstream side of the magnetic sheet 3, but when the surface runout on the upstream side of the magnetic sheet 3 is particularly large, it is necessary to regulate only the upstream side of the magnetic sheet 3. A sliding contact portion of the member 2 is provided, and at this time, the upstream side of the magnetic sheet 3 runs stably, and the radial touch is good.

Furthermore, since the area of the regulating member 2 that comes into sliding contact with the magnetic sheet 3 is reduced, friction loss is reduced and the required torque of the drive motor (not shown) for the magnetic sheet 3 is reduced. Therefore, the motor becomes smaller and the drive power source also has a smaller capacity, which is particularly advantageous for devices such as electronic still cameras that require small size, light weight, and low power consumption.

Note that the sliding contact portion of the regulating member 2 may be provided only on the downstream side of the magnetic sheet 3.

Furthermore, FIG. 7 shows a fourth embodiment of the present invention.

This is configured so that the regulating member 2 moves in conjunction with the magnetic head 4, and the length of the magnetic sheet 3 of the regulating member 2 in the radial direction is shortened, so that only the periphery of the magnetic head 4 has an upstream regulating section. 2a and the downstream regulating portion 2b are brought into sliding contact. By reducing the contact area of the regulating member 2 to the magnetic sheet 3 in this way, the torque acting as a rotational drive source for the magnetic sheet 3 can be further reduced.

〔Effect of the invention〕

As described in detail above, according to the present invention, the surface runout of the magnetic sheet is suppressed, making it resistant to vibrations, shocks, etc., ensuring good head touch and stable output, as well as preventing scratches occurring on the magnetic sheet. The lifetime of the magnetic sheet and magnetic head can be extended.

[Brief explanation of drawings]

FIG. 1 is a partially sectional side view showing an embodiment of the flexible magnetic sheet recording/reproducing device of the present invention, FIG. 2 is a partially sectional side view taken in a direction perpendicular to FIG. 1, and FIG. Top view of Figure 1,
Fig. 4 is a perspective view showing the present invention, Fig. 5 is a partially sectional side view showing a second embodiment of the invention, and Fig. 6 is a partially sectional side view showing a third embodiment of the invention. 7 is a partially sectional side view showing a fourth embodiment of the present invention, FIG. 8 is a partially sectional side view showing a conventional flexible magnetic sheet recording/reproducing device, and FIG. 9r1! J is a partially sectional side view taken in a direction orthogonal to FIG. 8, and FIG. 1θ is a partially sectional side view showing a conventional flexible magnetic sheet recording/reproducing device #. l...Stabilizing member 2...Regulating member 3...Magnetic sheet 4...Magnetic head 5...Spindle agent Patent attorney Noriyuki Ken Yudo Takehana Kikuo No. l Figure 2 Figure 3 Figure 5 Figure 6 Figure 7

Claims (2)

[Claims] (1) A spindle to which a flexible magnetic sheet is attached and rotates around a predetermined axis; a magnetic head that records and reproduces signals by contacting the rotatably driven flexible magnetic sheet; On the other hand, a sliding contact portion is provided sandwiching the flexible magnetic sheet and comes into contact with the flexible magnetic sheet on the front side and the rear side in the rotational direction of the flexible magnetic sheet with the position of the magnetic head as the center. a stabilizing member having;
The stabilizing member is provided with the flexible magnetic sheet sandwiched therebetween, and at least forward in the rotational direction of the flexible magnetic sheet with respect to the sliding contact portion of the stabilizing member with the position of the magnetic head as the center. 1. A flexible magnetic sheet recording/reproducing device comprising: a regulating member having a sliding contact portion on the side or on the rear side in the rotational direction. (2) The sliding contact portion of the regulation member is movable toward the front side in the rotation direction of the flexible magnetic sheet, the rear side in the rotation direction, or the radial direction of the flexible magnetic sheet. A flexible magnetic sheet recording and reproducing device according to claim 1.