JPH02247868A - Double-side recording and reproducing device - Google Patents

Abstract

PURPOSE:To facilitate the assembly work and to prevent abrasion of a magnetic sheet and a magnetic head by forming integrally a stabilizing member for generating positive and negative pressures between itself and the magnetic sheet and providing the magnetic heads holding the sheet between them. CONSTITUTION:A stabilizing plate 21 has a protrusion part 20 on the opposite side to the magnetic sheet 11, and is provided freely forwards and backwards against one side recording surface 22 of the magnetic sheet 11. Since inclined surfaces 23 and 24 of the protrusion part 20 are situated on the upperstream side and the downstream side of the rotating direction of the sheet 11 respectively, a positive pressure between the inclined surface 23 and the sheet 11 while a negative pressure between the inclined surface 24 and the sheet 11 are generated in accordance with the rotation of the sheet 11 at high speed. The magnetic head 30 is provided opposite to the inclined surface 23 holding the sheet 11 between them, and the magnetic head 29 is provided by penetrating a through hole 28 on the inclined surface 24, so that the recording surface 31 of the sheet 11 is brought into contact with the head 30 while the recording surface 22 with the head 29 by the positive pressure and the negative pressure respectively. By this method, the assembly work is facilitated while the abrasion of the magnetic sheet and the magnetic head can be suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a double-sided recording and reproducing device that can perform magnetic recording and reproducing using both sides of a magnetic sheet.

<Prior Art> Conventionally, there is a double-sided recording and reproducing device that performs magnetic recording and reproducing using both sides of a magnetic sheet, as shown in FIG. has been done. That is, on the husband's side of the front and back surfaces of the A1 sheet 11, magnetic heads 12 that can be slidably contacted with the front and back surfaces of the magnetic sheet 11 are arranged with the positions of sliding contact with the magnetic sheet 11 shifted accordingly. It is set up. At a position facing each magnetic head 12 with the magnetic sheet 11 in between, a regulating member 13 is disposed to sandwich the magnetic sheet 11 together with each magnetic head 12 to achieve a good head touch. Moreover, each regulating member 13 is formed integrally with the magnetic head 12 disposed on the side where each regulating member 13 is located.
The magnetic head member 14 has a generally U-shaped cross section. Therefore, by pressing these magnetic head members 14 from the front and back sides of the magnetic sheet 11 and sandwiching the magnetic sheet 11, the head touch is stabilized.

Another conventional example disclosed in, for example, Japanese Patent Laid-Open No. 63-18573 is as shown in FIG. The configuration of this example is almost the same as that of the conventional example described above, but here, each magnetic head member 14 arranged with a magnetic sheet 11 in between is arranged along the recording surface of the magnetic sheet (Fig. They are located so that they are offset from each other (in the left and right direction). In other words, the magnetic head member 1 positioned in this way
By sandwiching the magnetic sheet 11 between the magnetic heads 12 and the regulating member 13, each magnetic head 12 is brought into a state in which it reliably comes into sliding contact with each recording surface of the magnetic sheet portion located between the magnetic head 12 and the regulating member 13.

<Problems to be Solved by the Invention> In the conventional double-sided recording/reproducing apparatus as shown in FIGS. , each magnetic head 1
2 must be adjusted separately and very precisely,
There was a problem that the work was complicated and difficult.

In addition, in these conventional examples, each magnetic head 12
The acting force that causes the magnetic sheet 11 to slide into contact with the magnetic sheet 11 is a biasing force that causes the regulating member 13 to push the magnetic rate 11 toward the respective magnetic heads 12, and the two sets of regulating members 13 and the magnetic heads 12 simultaneously Since a frictional force is applied to the magnetic sheet 11, there is a problem that not only is it difficult to rotate the magnetic sheet 11, but also the magnetic sheet 11, the magnetic head 12, etc. are easily damaged and worn.

Means for Solving the Problems> A double-sided recording and reproducing apparatus according to the present invention includes: a first magnetic head that is provided to be movable forward and backward with respect to one recording surface of a magnetic sheet and that can come into sliding contact with the recording surface; a first stable member facing the magnetic sheet and movable back and forth, generating a negative pressure between the magnetic sheet and the magnetic sheet as the magnetic sheet rotates to draw the magnetic sheet into sliding contact with the first magnetic head; a second stabilizing member facing the surface and integrally formed with the first stabilizing member and generating positive pressure between the magnetic sheet and the magnetic sheet as the magnetic rate rotates to move the magnetic sheet away; a second magnetic head that is located opposite to the second stable member with a magnetic sheet in between, is provided so as to be movable forward and backward relative to the other recording surface of the magnetic sheet, and can come into sliding contact with the recording surface; It is characterized by:

As the magnetic sheet rotates at high speed, negative pressure is generated between the magnetic sheet and the stabilizing member provided on the side of the first magnetic head, causing the first magnetic head to protrude close to the magnetic sheet. The magnetic sheet is drawn to the magnetic sheet and brought into sliding contact with the magnetic sheet to perform magnetic recording and reproduction on one recording surface of the magnetic sheet.

At the same time, as the magnetic sheet rotates at high speed, a positive pressure is generated between the magnetic sheet and a second stable member integrally formed with the first stable member, causing the magnetic sheet to move into the second stable member. At the same time, the second magnetic head slides into contact with the other recording surface of the magnetic sheet in this state so as to push the magnetic sheet back toward the second stable member, and magnetic recording and reproduction on the other recording surface is performed. It will be done.

<Embodiment> An embodiment of the double-sided recording/reproducing apparatus according to the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 1, which is a perspective view of this embodiment, and FIG. 2, which is a cross section taken along the line A-A in FIG. A double-sided recording device main body (hereinafter simply referred to as the device main body), which is not shown and is equipped with a drive source for driving high-speed rotation, includes a stabilizing plate 21 having a protrusion 20 formed on the side facing the magnetic sheet 11. It can move forward and backward with respect to the recording surface 22 on one side of the magnetic sheet 11 facing the magnetic sheet 11, and in the radial direction of the magnetic sheet 11 (arrow
direction).

The magnetic sheet 11 is provided on the surface of the protrusion 20 located on the upstream side in the rotational direction of the magnetic sheet 110 that faces the magnetic sheet 11.
The magnetic sheet 1 gradually increases toward the downstream side in the direction of rotation.
An inclined surface 23 is formed which is inclined so as to approach the free rotation N of the magnetic sheet 11. As the magnetic sheet 11 rotates at high speed, positive pressure is generated between the inclined surface 23 and the magnetic sheet 11, and the magnetic sheet 11 This acts to keep the surface away from the inclined surface 23 side.

Further, the surface of the protrusion 20 located on the downstream side of the inclined surface 23 facing the magnetic sheet has an inclined surface that gradually moves away from the free rotation surface N of the magnetic sheet 11 as it goes downstream in the rotational direction of the magnetic sheet 11. As the surface 24 is formed and the magnetic sheet 11 rotates at high speed, negative pressure is generated between the inclined surface 24 and the magnetic sheet 11, which acts to draw the magnetic sheet 11 toward the inclined surface 24.

Furthermore, in this embodiment, a surface 25 of the stabilizing plate 21 formed on the upstream side of the inclined surface 23 facing the magnetic sheet 11;
and the magnetic sheet 11 of the stabilizing plate 21 formed between the inclined surfaces 23 and 24, which facing surface 26, and the magnetic sheet of the stabilizing plate 21 formed downstream of the inclined surface 24. 11, each of the surfaces 27 facing the magnetic sheet 11
The flat opposing surface 26 is formed substantially parallel to the free rotation surface N to promote the generation of positive pressure and negative pressure on each of the inclined surfaces 23 and 24.
By making the magnetic sheet 11 follow this opposing surface 26, the magnetic sheet 11 generated by the respective inclined surfaces 23 and 24 is
It has the effect of suitably smoothing out the deflection of. By the way, in this specification, the free rotation surface N refers to the surface of the magnetic sheet 11 when the magnetic plate 11 attached to the drive source of the device main body rotates steadily without any external force acting on it other than the rotational driving force. It refers to a rotating surface.

A through hole 28 is formed approximately at the center of the downstream inclined surface 24 of the stabilizer plate 21 so as to penetrate the stabilizer plate 21 approximately perpendicularly to the free rotation surface N of the magnetic sheet 11 . Further, in the device main body, a magnetic head 29 is attached to the through hole 28.
It is provided so that it can move forward and backward with respect to the recording surface 22 on one side of the magnetic sheet 11 and can move along the radial direction of the magnetic sheet 11 (in the direction of arrow C in the figure) together with the stabilizing plate 24 when it is pushed into the magnetic sheet 11. There is. Furthermore, a magnetic head 30 is located at a position facing the upstream inclined surface 23 of the stabilizing plate 21 with the magnetic sheet 11 in between, and a magnetic head 30 is arranged so as to be movable forward and backward with respect to the other recording surface 31 of the magnetic sheet 11 and to be able to move around the radius of the magnetic sheet 11. The magnetic head 29 and the stabilizing plate 21 are provided in the main body of the apparatus so as to be movable along the direction.

Further, in this embodiment, an inclined member 32 having an inclined surface 23 on the upstream side of the stabilizer plate 21 is fitted into a guide hole 33 formed in the stabilizer plate 21 so as to be able to move forward and backward relative to the magnetic sheet 11. . Further, a tension spring 34 is interposed between the lower end of the inclined member 32 in the figure and the bottom of the guide hole 33, and the lower end of the stabilizer plate 21 in the figure is penetrated by the inclined member. A screw 35 abutting the lower end in the figure 32 is screwed together, and by rotating the screw 35, the position of the inclined surface 23 relative to the magnetic sheet 11 can be changed, and the positive pressure generated can be adjusted. It has become.

Therefore, by rotating the magnetic sheet 11 at high speed and positioning the stabilizer plate 21 at a predetermined position close to the magnetic sheet 11, a positive pressure can be applied between the inclined surface 23 of the upstream portion of the stabilizer plate 21 and the magnetic sheet 11. occurs and the magnetic sheet 11
is moved away from this inclined surface 23, and as a result, the inclined surface 23
A recording surface 31 on one side of the magnetic sheet 11 comes into sliding contact with a magnetic head 30 that is positioned protruding from the magnetic head 30, and magnetic recording and reproduction on this recording surface 31 is performed. At the same time,
The inclined surface 24 of the downstream part of the stabilizer plate 21 and the magnetic sheet 11
Negative pressure is generated between the magnetic sheet 11 and the recording surface 2 on the other side of the magnetic sheet 11 to draw the magnetic sheet 11 toward the inclined surface 24 and to the magnetic head 29 protruding from the inclined surface 24.
2 are in sliding contact with each other, and magnetic recording and reproduction on the recording surface 22 is performed.

Further, as shown in FIG. 3, a perspective view of another embodiment, and FIG. 4, a sectional view taken along the line B-B in FIG. A stabilizing plate 41 having a concave portion 40 formed approximately in the center of the side that faces the stabilizing plate 41 can move forward and backward with respect to the recording surface 22 on one side of the magnetic sheet 11 facing the stabilizing plate 41, and can move in the radial direction of the magnetic sheet 11 (in the figure). It is provided so as to be movable along the direction of arrow C).

The recess 4 located on the upstream side in the rotational direction of the magnetic sheet 11
On the surface facing the magnetic sheet 11 of
Slanted surface 42 that slopes away from the free rotation surface N of
is formed, and as the magnetic sheet 11 rotates at high speed, a negative pressure is generated between the inclined surface 42 and the magnetic sheet 11, which acts to draw the magnetic sheet 11 toward the inclined surface 42.

Further, the surface of the concave portion 40 located on the downstream side of the inclined surface 42 facing the magnetic sheet 11 has an inclined surface that gradually moves away from the free rotation surface N of the magnetic sheet 11 as it goes downstream in the rotational direction of the magnetic sheet 11. As the surface 43 is formed and the magnetic sheet 11 rotates at high speed, positive pressure is generated between the inclined surface 43 and the magnetic sheet 11, and the magnetic sheet 11
acts to move away from the inclined surface 43 side.

Furthermore, in this embodiment, a surface 45 facing the magnetic sheet 11 of the stabilizing plate 41 formed on the upstream side of the inclined surface 43;
and a surface 46 of the stabilizing plate 41 formed between the sloped surface 42 and the sloped surface 43 facing the magnetic sheet 11, and a magnetic field of the stabilizing plate 41 formed downstream of the sloped surface 43. Each of the surfaces 47 facing the sheet 11 is connected to the magnetic sheet 11.
It is formed of a flat surface approximately parallel to the free rotation surface N of the stabilizer plate 41 to promote the generation of negative pressure and positive pressure generated on each of the inclined surfaces 42 and 43. The flat opposing surfaces 45 and 47 are formed by making the magnetic sheet 11 follow these opposing surfaces 45 and 47, thereby forming the respective inclined surfaces 42 and 47.
It has the effect of suitably smoothing the deflection of the magnetic sheet 11 caused by the magnetic sheet 43.

A through hole 48 passing through the stabilizing plate 41 substantially perpendicularly to the free rotation surface N of the magnetic sheet 11 is formed in the substantially central portion of the upstream inclined surface 42 of the stabilizing plate 41. . Further, in the device main body, a magnetic head 49 is installed in the through hole 4.
8, it is provided so that it can move forward and backward with respect to the recording surface 22 on one side of the magnetic sheet 11, and is movable together with the stabilizing plate 41 along the radial direction of the magnetic sheet 11 (direction of arrow C in the figure). ing. Further, at a position facing the downstream inclined surface 43 of the stabilizer plate 41 with the magnetic sheet 11 in between,
The magnetic head 50 is connected to the other recording surface 31 of the magnetic sheet 11.
The magnetic head 49 is provided in the apparatus main body so as to be able to move forward and backward with respect to the magnetic sheet 11 and to be movable together with the magnetic head 49 and the stabilizer plate 41 along the radial direction of the magnetic sheet 11.

Further, in this embodiment, an inclined member 52 having an inclined surface 43 on the downstream side of the stabilizer plate 21 is fitted into a guide hole 53 formed in the stabilizer plate 41 so as to be able to move forward and backward relative to the magnetic sheet 11. . Further, a tension spring 34 is interposed between the lower end of the inclined member 32 in the figure and the bottom of the guide hole 53, and the lower end of the stabilizer plate 41 in the figure is penetrated by the inclined member. A screw 35 that comes into contact with the lower end in the figure 52 is screwed together, and by rotating the screw 35, the position of the inclined surface 43 relative to the magnetic sheet 11 can be changed and the generated positive pressure can be adjusted. It has become.

Therefore, by rotating the magnetic sheet 11 at high speed and positioning the stabilizing plate 41 at a predetermined position close to the magnetic sheet 11, a negative force can be created between the inclined surface 42 on the upstream side of the stabilizing plate 41 and the magnetic sheet 11. Pressure is generated and the magnetic sheet 11
At the same time, the recording surface 22 on one side of the magnetic sheet 11 comes into sliding contact with the magnetic head 49 protruding from the inclined surface 42, and magnetic recording and reproduction on the recording surface 22 is performed. At the same time, positive pressure is generated between the inclined surface 43 on the downstream side of the stabilizer plate 21 and the magnetic sheet 11, and the magnetic sheet 11 is moved away from this inclined surface 43.
As a result, the recording surface 3 on one side of the magnetic sheet 11 is exposed to the magnetic head 50 located protruding from the inclined surface 43.
1 comes into sliding contact, and magnetic recording and reproduction on this recording surface 31 is performed.

By the way, in the embodiment described above, the inclined surface 23.42 that generates positive pressure between the magnetic sheet and the magnetic sheet is configured so that the distance between the inclined surface 23 and the magnetic sheet 11 can be finely adjusted by rotating the screw 35. , inclined surface 24.4 that generates negative pressure
2 may also have a similar configuration so that the distance to the magnetic sheet can be finely adjusted, and of course, these m adjustment mechanisms may not be provided. In addition, in this embodiment, the stabilizer plate 21.41
and a magnetic head 29. arranged on the side of the stabilizer plate 21°41.
Although it is provided separately from the magnetic head 29°4
9 and the stabilizers 21, 4] may be integrally formed with the stabilizers 21, 4] accurately positioned in advance.

<Effects of the Invention> According to the double-sided recording/reproducing device of the present invention, the stabilizing members that generate positive pressure and negative pressure between the magnetic sheets as the magnetic sheet rotates are integrally formed, and the magnetic sheet By installing magnetic heads on the side where this integrated stable member is placed and the opposite side of the magnetic sheet, magnetic recording and reproducing is performed on both sides of the magnetic sheet. Compared to the case where two stabilizing members are provided, the positioning and adjustment of each member and assembly work are easier, reducing costs. At the same time, the frictional resistance of the stabilizing member against the magnetic sheet is reduced, reducing driving torque. Abrasion of the magnetic sheet and magnetic head can be suppressed.

[Brief explanation of drawings]

1 is a perspective view showing an embodiment of a double-sided recording/reproducing apparatus according to the present invention, FIG. 2 is a sectional view taken along the line A-A in FIG. 1, and FIG.
The figure shows a sealed view showing another embodiment, FIG. 4 is a sectional view taken along the line B-B in FIG. 3, and FIGS. It is a diagram. In the drawing, 11 is a magnetic sheet, 12, 29, 30°49.
50 is a magnetic head, 21.41 is a stabilizing plate, 22.31 is a recording surface, 23, 24, 42, 43 are inclined surfaces, 28.48
is a through hole, and 29, 30°49.50 is a magnetic head. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6/

Claims (1)

[Claims] a first magnetic head that is movable forward and backward with respect to one recording surface of the magnetic sheet and capable of slidingly contacting the recording surface; By generating a negative pressure between the sheet and the first
a first stable member that is attracted to and comes into sliding contact with the magnetic head; and a first stable member that faces the recording surface and is formed integrally with the first stable member, and that creates a positive relationship between the magnetic sheet and the magnetic sheet as the magnetic sheet rotates. a second generating pressure to move the magnetic rate away;
a second stabilizing member located opposite to the second stabilizing member with the magnetic rate in between, and a second stabilizing member that is movable forward and backward relative to the other recording surface of the magnetic sheet and that is in sliding contact with the recording surface. What is claimed is: 1. A double-sided recording/reproducing device comprising: a magnetic head;