JPH04188460A - Signal recording and regenerating apparatus - Google Patents

Abstract

PURPOSE:To increase the following range of a recording and regenerating element with respect to the displacement in the height of a recording medium by providing an arm part along the vicinity of the outer surface of an attaching part at the intermediate part of a linking part in the longitudinal direction for a supporting plate which supports the recording and regenerating element. CONSTITUTION:Head supporting plates 7 and 16 are formed of elastic material. First and concentric supporting frames 7a-7c are provided to ward the outside from the center. The supporting frames 7a-7c are mutually linked with tie bars 7d and 7e. One end of the tie bar 7e is linked to the retreating side of the supporting frame 7a. The other end is linked to the input side of the supporting frame 7b. The intermediate Part of the tie bar 7e in the longitudinal direction is made to extend into the relative running direction of a head 6 with respect to a disk 7, and an arm part 7f is formed. At this time, the arm part 7f is provided in the longitudinal direction of the tie bar 7e. Therefor the entire length is made long. Thus, the displacement amount in the direction of the height of the supporting frame 7a can be made large. In this way, the following range of the recording and regenerating range for the displacement in the direction of the height of the recording medium can be made large, and the following property of the recording and regenerating element can be improved.

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 to a signal recording/reproducing device that improves the followability of a recording/reproducing element to the recording medium. It is.

(Prior Art) A flexible disk device (hereinafter referred to as FDD) has traditionally been used as an external storage device for computers, and magnetically records or reproduces information on a flexible magnetic disk.
) is known.

These flexible FDDs have been rapidly becoming smaller and larger in capacity in recent years, and accordingly, higher recording density 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, warping or waviness of the rotating magnetic disk, will affect the output of the magnetic head. This will have a significant negative effect on the characteristics.

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 concentric support frames 1a, lb, and 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 movable with respect to the third support frame IC.

That is, the second tie bar 1e connects the first support frame 1a to the second support frame ib 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. Due to the elastic deformation (torsional displacement) of the second tie bar 1e, the first support frame 1a can swing relative to the third support frame 1c in directions A and B in the figure, and It is freely displaceable in the height direction (two directions).

Similarly, the first tie bar 1d connects the second support frame 1b to the third support frame 1c 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 is also movable in the height direction (Z direction).

In this way, conventionally, the magnetic head 2 is attached to the head support plate 1 such as described above so as to be freely displaceable with respect to the head arm, so that the head 2 follows the disk surface. I was starting to get it.

Further, the magnetic heads 2 supported by the head support plate 1 as described above are arranged on both sides of the disk 3 as shown in FIG. 5(B), and the disk is held between the pair of heads. It has become.

The head support plate 1 is biased by a spring (not shown) so as to come into pressure contact with the disk, and the lower head support plate 1 is bent downward as shown in the figure.

(Problem to be Solved by the Invention) By the way, the head 2 is
When the disk 3 is rotated while supporting the head, if the disk 3 undulates upward as shown in FIG. 5(A), the head support plate 1 has been bent downward in advance. Therefore, due to its elastic return force, this deflection (
The head 2 follows the disk 3 and is displaced upward until it reaches the position.

However, after the head support plate 1 is no longer bent, the head 2 cannot follow the disk 3.

Here, the conventional head support plate 1 can follow twisting displacement to some extent, but since the amount of displacement in the height direction is extremely small, the range in which the head 2 can follow the waviness of the disk 3 in the height direction is extremely limited. The problem is that it is small.

On the other hand, as shown in FIG. 5(C), when the disk 3 undulates downward, the head support plate 1 reaches its limit of deflection, so excessive contact pressure is applied to the magnetic head 1. There is a risk that this head, disk, etc. may be damaged.

(Means for Solving the Problems) The present invention has been made in view of the above-mentioned circumstances, and is intended to improve the tracking range of a recording/reproducing element for the displacement in the height direction that occurs when a recording medium such as a disk runs. It is an object of the present invention to provide a signal recording and reproducing device that can be made larger.

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 and reproducing elements; a connecting part that is connected to the fixed part side and elastically connects the mounting part to the fixed part side, and an arm part is provided along the vicinity of the outer periphery of the mounting part in the middle part in the longitudinal direction of the connecting part. The present invention provides a signal recording and reproducing device characterized by:

(For A) According to the present invention as described above, since the attachment is provided at the connecting part for connecting the part to the fixed part side, and the arm part along the part is provided, the above-mentioned attachment is not possible. It is possible to increase the amount of displacement in the height direction of the section.

As a result, it is possible to widen the tracking range of the recording/reproducing element with respect to the displacement in the height direction of the recording medium, and it is possible to improve the followability of the recording/reproducing element with respect to the recording medium.

(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 structure of a head support structure 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 that transports a first magnetic head 6. , the disk 3 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 helad 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 opposite to 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 have a plane-symmetric configuration with respect 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 suffix (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 7e 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. The head 6.15 is pressed against the disk 3 while the head 6.15 is pressed against the disk 3, and the head support plate 7 at the bottom in the figure
The head 6 is positioned below by deforming the tie bars 7d and 7e.

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 shown in FIG. 3 act on each head 6.15 supported by the head support plates 7.16, are canceled out.

That is, due to the elastic deformation (torsional displacement) of the second tie bar 7e, the first support frame 7a becomes the second support frame 7.
It is designed to be able to swing in directions A and B in FIG. 2 with respect to the third support frame 7c via the support frame 7a.
, , 7b, the connecting positions of both ends of the tie bar 7e are respectively displaced forward and backward in the traveling direction of the disk 3 (the exit side and the entrance side), as described above, so that the connection position of the both ends of the tie bar 7e with respect to the
The rotational moment MA, M that causes spacing loss to occur by separating the disk 3 (right side in Figure 3) from the disk 3.
The point of action of the elastic return force Ep of the tie bar 7e for offsetting the force B on 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).

Note that it goes without saying that the more the connection point is located on the exit side, the smaller the elastic return force tap is 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 rotational moment MA,
This will offset MB.

In addition, in this embodiment, the arm portion 7f is provided in the longitudinal direction of the tie bar 7e to increase the overall length, so that the amount of displacement in the height direction (two directions) of the first support frame 7a is increased. This makes it possible to further improve the tracking ability of the head 6.15 with respect to the disk 3.

That is, when the disk 3 is displaced upward during rotation, the head support plate 7 and the head 6 are displaced upward following the displacement of the disk, as shown in FIG. 3(A).

In addition, if the disk 3 is displaced downward during rotation,
As shown in FIG. 3(C), the head support plate 7 and the head 6 are displaced downward following the displacement of the disk.

Since the amount of displacement of the head, etc. at this time is larger than that of the prior art due to the provision of the arm portion 7f, it is possible to widen the tracking range of the head 6 with respect to the disk 3.

In the above embodiment, the arm portion 7f is parallel to the outer periphery (side) of the first support frame 7a, which is the head mounting portion, but the arm portion according to the present invention is not limited to this. For example, this arm portion is not attached to the first support frame 7.
It may be formed so as to draw an arc close to the outer periphery of a.

In addition, although the above-mentioned embodiment applies the present invention to a magnetic speech recording and reproducing device, it is obvious that the present invention may be applied to a signal recording and reproducing device using a recording and reproducing method other than magnetic. It is.

(Effects of the Invention) As is clear from the above description, according to the present invention, the attachment is achieved by providing an arm along the part at the connecting part for connecting the part to the fixed part side. The above-mentioned mounting can increase the amount of displacement in the height direction of the part.

Thereby, it is possible to increase the range in which the recording/reproducing element follows the displacement in the height direction of the recording medium, and it is possible to improve the followability of the recording/reproducing element to the recording medium.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a main part showing an embodiment of the present invention, FIGS. 2(A) and (B) are perspective views showing the structure of a head support plate, and ) is a front view of a magnetic head and a magnetic head support plate showing the operating state of the present invention, FIG. 4 is a perspective view of a conventional magnetic head support plate, and FIG. 5(A)
(B) and (C) are front views of a magnetic head and a magnetic head support plate for explaining the operating state of a conventional example. 3...Magnetic disk (recording medium), 6.15...Magnetic head (recording/reproducing element), 7.16
...Head support plate (support plate), 7a, 7b, '7c"
'Support frame, 16a, 16b', 16cm support frame, 7d, 7e... tie bar (connection part), 16d, 16e
... Tie bar (connection part), 7f, 16f... Arm part. χ111! l To Rjia! Il [Body color entrance side (B) first magnetic hand support plate χ2 concave

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: a signal recording/reproducing device, wherein the support plate includes at least a mounting portion to which the recording/reproducing element is attached; one end side is connected to the mounting portion; the other end side is connected to a fixed portion side; A signal recording and reproducing device, comprising: a connecting portion for elastically connecting the connecting portion to a fixed portion side, and an arm portion extending near the outer periphery of the attaching portion is provided at a longitudinally intermediate portion of the connecting portion.