JPH04188459A - Signal recording and regenerating apparatus - Google Patents

Abstract

PURPOSE:To prevent the occurrence of spacing loss by providing a linking part for elastically linking an attaching part of a recording and regenerating element to a fixing part, and setting the linking position of the attaching part of the linking part at the retreating side of the running direction of a recording medium for the recording and regenerating element with respect to the linking position for the side of the fixing part. CONSTITUTION:A first magnetic head 6 is elastically supported at the tip part of a head carriage 5 through a first head supporting plate 7. A second magnetic head 15 is elastically supported with a second supporting plate 16 at the tip part of a head arm 9. The head supporting plates 7 and 16 are provided with concentric supporting frames 7a-7c to the outward from the center. The supporting frames are linked with tie bars 7d and 7e to each other. One end of the tie bar 7e is linked to the retreating side of the supporting frame 7a, and the other end is linked to the input side of the supporting frame 7b. Therefore, the acting point of the elastic returning force of the time bar 7e for offsetting the rotary moment for the supporting frame is located at the retreating side. The rotary moment becomes the cause of spacing loss. Thus, the occurrence of the spacing loss can be prevented.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a signal recording/reproducing device for recording and reproducing various information signals on a recording medium, and in particular, for recording and reproducing various information signals on a recording medium. Good accuracy (made so that it can be supported).

(Prior Art) Flexible disk devices (hereinafter referred to as FDDs) have been known that are used as external storage devices for computers and perform magnetic recording or reproduction of information on flexible magnetic disks.

In recent years, such FDDs have been rapidly becoming smaller and larger in capacity, and accordingly, higher density recording has been required.

Here, it has been generally known that for high-density recording, the width of the magnetic gap of the magnetic head can be narrowed to increase the recording frequency.

However, when the width of the magnetic gap is narrowed in this way, changes in the gap between the disk and the magnetic head (hereinafter referred to as "spacing") caused by, for example, warpage of the magnetic disk, have a significant negative impact on the output characteristics of the magnetic head. I'll give it away.

Therefore, it is necessary to stabilize the contact state between the magnetic head and the magnetic disk and to keep the spacing small. For this purpose, in a conventional FDD, a head support plate 1 having a structure as shown in FIG. 4 is used. It was getting worse.

The head support plate 1 is made of a flexible elastic material, and includes first to third concentric support frames 1a, Ib, lc extending outward from the center as shown in the figure. ing.

Further, a magnetic head 2 is attached to the first support frame 1a, and the third support frame IC is attached to a head arm (not shown), so that the magnetic head 2 can be attached to a head arm (not shown). It is attached to the arm via the head support plate 1.

Here, each of the support frames is connected to each other by a first tie bar 1d and a second tie bar 1e, and the first and second
The support frames 1a and lb are swingable relative to the third support frame 1c.

That is, the second tie bar 1e connects the first support frame 1a with respect to the second support frame 1b in a direction perpendicular to the relative running direction R of the head with respect to the disk (X direction in the figure) as shown in the figure. The elastic deformation (torsional displacement) of the second tie bar 1e allows the first support frame 1a to swing in directions A and B in the figure with respect to the third support frame 1c. ing.

Similarly, the first tie bar 1d connects the second support frame 1b to the third support frame IC in the relative running direction of the head 2 with respect to the disk (Y direction in the figure) as shown in the figure. Due to the elastic deformation of the first tie bar 1d, the first support frame 1a can swing in the directions C and D in the figure with respect to the third support frame 1c via the second support frame 1b. It looks like this.

In this way, conventionally, the magnetic head 2 is swingably attached to the head arm by the head support plate 1 as described above, which allows the head 2 to follow the disk surface. It was becoming possible to do so.

The head support plate 1 is urged by a spring (not shown) so as to come into pressure contact with the disk.

(Problem to be Solved by the Invention) By the way, the head 2 is
If the disk is rotated while supporting the fifth
As shown in FIGS. 4 and 5, the rotation of the disk 3 in one direction (R direction) and the pressing force by the subrig lift the head 2 on the disk exit side (right side in FIG. 5). Rotational moment MA in the A and B directions in the figure,
MB will occur.

Further, the conventional head support plate 1 as described above has a second
The tie bar 1d is freely swingable in both directions A and B in FIG.

Therefore, the rotational moment M in the A and B directions as described above
A. When MB occurs, one end of the head 2 easily floats up and separates from the disk 3 as shown in FIG. 5, resulting in a spacing loss. It was hot.

It is possible to prevent the spacing loss by increasing the pressing force of the pressing spring, but in that case, the frictional force between the disk 3 and the head 2 increases, and the durability of the disk etc. decreases. There are other negative effects such as

(Means for Solving the Problems) The present invention has been made in view of the above-mentioned circumstances, and provides magnetic recording that can prevent the occurrence of spacing loss due to the rotational moment generated when the disk rotates. The purpose is to provide a playback device.

In order to achieve this object, the present invention provides a recording/reproducing element that performs recording and/or reproducing by slidingly contacting a traveling recording medium, and a recording/reproducing element that is elastically connected to the recording medium. A signal recording/reproducing device comprising: a support plate for supporting at least one of the recording/reproducing elements; a connecting portion that is connected to the side and elastically connects the attachment portion to the fixing portion side, and the connecting portion is connected to the attaching portion at a position where the connecting portion is connected to the fixing portion side, and the connecting portion is connected to the fixing portion side. The present invention provides a signal recording/reproducing device characterized in that the exit side of the medium in the running direction is the exit side.

(Function) According to the present invention as described above, even if a rotational moment as described above occurs, this rotational moment can be canceled out and suppressed, thereby causing the exit side of the recording/reproducing element to be separated from the recording medium. This can prevent spacing loss from occurring.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail using FIGS. 1 to 3.

FIG. 1 is an exploded perspective view showing the configuration of a head support mechanism which is a main part of a magnetic recording and reproducing apparatus to which the present invention is applied. In the figure, 5 is a head carriage for transporting a first magnetic head 6; The disk 3 is driven by a drive means (not shown).
is driven along the radial direction (direction of arrow S in FIG. 1).

A first magnetic head 6 is mounted on the top surface of the tip of the disk carriage 5 through a first head support plate 7 for slidingly contacting the bottom surface of the disk 3 to perform recording or reproduction on the bottom surface of the disk. It has received overwhelming support.

In this embodiment, in order to prevent noise from entering the first magnetic head 6 from external circuits, a first shield link 8 is provided to surround the first magnetic head 6. is provided.

Further, as shown in the figure, a head arm 9 is supported on the helad carriage 5 so as to be elastically displaceable in the vertical direction via a leaf spring 10 and a support member 11. It is urged downward in the figure by a spring 12.

Note that the support member 11 is fixed to the head carriage 5 with fixing screws 13.

A second magnetic head 15 for recording or reproducing information on the upper surface of the disk 3 is resiliently supported by a second support plate 16 on the lower surface of the tip of the head arm 9.

Further, a second shield link 17 for preventing noise from entering the second magnetic head 15 is fixed so as to surround the second magnetic head 15.

This second magnetic head 15 is disposed facing the first magnetic head 6, and its upward position in FIG. 1 is regulated by a pivot 18 provided on the head arm 9. The support plate 16 allows it to swing about a pivot 18 as a fulcrum.

Further, each of the head support plates 7.16 in this embodiment is constructed as shown in FIGS. 2(A) and 2(B).

Note that these head support plates are symmetrical to each other, so that by explaining one support plate 7, the description of the other support plate will be omitted by giving the same suffixes (a-a). .

That is, these head support plates 7.16 are made of a flexible elastic material, and as shown in the figure, first to third concentric support frames 7a, 7b extend outward from the center. , '7c.

Further, the magnetic head 6 is attached to the first support frame 7a, and the third support frame 7c is attached to the helad carriage 5,
This allows the magnetic head 6 to be attached to the head carriage 5 via the head support plate 7.

Here, the support frames 7a, 7b, and 7c are connected to each other by a first tie bar 7d and a second tie bar 7e, and are connected to each other by a first tie bar 7d and a second tie bar 7e.

7b is swingable relative to the third support frame 7c.

That is, the second tie bar 7e is formed into a substantially crank shape as shown in the figure, and is connected to the first tie bar 7e in a direction perpendicular to the relative running direction of the head 6 with respect to the disk 3 (X direction in the figure).
The support frame 7a is connected to the second support frame 7b, and one end of this tie bar 78 is connected to the first support frame 7a.
The other end is connected to the exit side of the second support frame 7b, and the other end is connected to the entrance side of the second support frame 7b.

Further, the middle part of the second tie bar 7e in the longitudinal direction is located in the relative running direction of the head 6 with respect to the disk 3 (Y direction in the figure).
The arm portion 7f is extended to form an arm portion 7f.

The second tie bar 7e allows the first support frame 7a to swing in the directions A and B with respect to the third support frame 7c via the second support frame 7b. .

On the other hand, the first tie bar 7d connects the second support frame 7b to the third support frame 7C in the relative running direction of the head 6 with respect to the disk 3 (Y direction in the figure) as shown in the figure. Due to the elastic deformation of the first tie bar 7d, the first support frame 7a can swing in the directions C and D in the figure with respect to the third support frame 7c via the second support frame 7b. It looks like this.

In the head support mechanism as described above, during recording or reproduction, the pressing spring 12 presses the helad arm 9 downward in FIG. Pressure is applied.

In this state, the disk 3 is rotationally driven in the downward direction R in FIG. 1 by a driving means (not shown), so that each of the magnetic heads 6.15 comes into sliding contact with each surface of the disk 3 to perform recording or reproduction. It will be done.

At this time, the first magnetic head 6 is connected to a recording/reproducing circuit (not shown) via a first flexible printed circuit board (hereinafter referred to as FPC) 19, and similarly, the second magnetic head 15 is connected to the first flexible printed circuit board (hereinafter referred to as FPC) 19. It is connected to a recording/reproducing circuit (not shown) via the second FPC 20, and signals are exchanged between each head 5, 16 and the recording/reproducing circuit.

Also, during such recording and reproduction, the head support plate 7
．． When rotational moments MA and MB that cause spacing loss as described above act on each head 6.15 supported by the head support plates 7 and 16, these moments are offset by the head support plates 7 and 16. .

That is, due to the elastic deformation (torsional displacement) of the second tie bar 78, the first support frame 7a becomes the second support frame 7.
The tie bar 7e can be swung in the A%B direction in the figure with respect to the third support frame 7C via the support frame 7C, but as shown in FIG. As mentioned above, since the connecting positions of both ends are displaced forward and backward in the running direction of the disk 3 (exit side and approach side), the rotational moments MA and MB that cause the spacing loss mentioned earlier can be reduced. The point of action of the elastic return force E of the tie bar 7e for offsetting the first support frame 7a is on the exit side.

As a result, the elastic return force Ep is smaller than the elastic return force E required to offset the rotational moment when the point of action is located in the center, so it is more efficient than the conventional method. Good (rotating moment MA, MB
This can suppress the contact pressure of the head 6.15 with the disk 3 (spacing loss can be prevented from occurring).

It goes without saying that the more the connection point is located on the exit side, the smaller the elastic return force Ep is than the elastic return force Ep required when the connection point is located on the entry side.

Furthermore, since the arm portion 7f acts as a leaf spring, the elastic return force of the arm portion 7f also increases due to the rotation moments MA, M.
This will cancel out B.

In addition, in this embodiment, the arm portion 7f is provided in the longitudinal direction of the tie bar 7e to make the entire length longer. Therefore, the amount of displacement in the height direction (Z direction) of the first support frame 7a is This can further improve the followability of the head 6.15 to the disk 3.

(Effects of the Invention) As is clear from the above description, according to the present invention, the manner in which the elastic restoring force is applied by the support plate is set depending on the manner in which the rotational moment that causes spacing loss is applied to the recording/reproducing element. By doing so, this rotational moment can be efficiently suppressed.

As a result, it is possible to improve the followability of the recording/reproducing element to the recording medium without particularly increasing the pressing force on the recording/reproducing element, and it is possible to prevent spacing loss from occurring.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the main parts showing an embodiment of the present invention, Figs. 2 (A) and (B) are perspective views showing the structure of the head support plate, and Fig. 3 shows the operating state of the present invention. FIG. 4 is a front view of the head and the magnetic head support plate, FIG. 4 is a perspective view of the conventional magnetic head support plate, and FIG. 5 is a front view of the magnetic head and the magnetic head support plate showing the operating state of the conventional example. 3...Magnetic disk (recording medium), 6.15...Magnetic head (recording/reproducing element), 7.16
...Head support plate (support plate), 7a, 7b, 7cm support frame, 16a, 16b, 16cm--Support frame, 7d, 7e...
- Tie bar (connection part), 16d, 16e... Tie bar (connection part) 7f, 16f... Arm part. Small 1t! 1 R-iii 19L! Body-invading steel χ2I! 1 E pressure spring l? The insertion force E of the insertion spring

Claims (1)

[Scope of Claims] A recording and reproducing element that performs recording and/or reproducing by being in sliding contact with a traveling recording medium, and a support plate that elastically supports this recording and reproducing element with respect to the recording medium. A signal recording/reproducing device comprising: at least a mounting portion to which the recording/reproducing element is attached; and one end connected to the mounting portion and the other end connected to a fixed portion. and a connecting part that elastically connects the connecting part to the fixing part, and the connecting position of the connecting part to the mounting part is set to the exit side in the running direction of the recording medium with respect to the recording/reproducing element, rather than the connecting position to the fixing part. A signal recording and reproducing device characterized by: