JPH0737346A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To minimize the escaping amount of a magnetic head from a magnetic disk by moving the supporting point part of an arm for holding an upper head in the vertical direction with respect to the surface of the magnetic disk without fixing the supporting point part to a carriage. CONSTITUTION:An arm 5 can be moved up and down by a height-position determining screw 7. At the same time, the arm 5 is always energized upward by a pin 10 and a coil spring 9. The screw 7 is rotated through a rack 12 and a pinion 11, which are interlocked with an inserted floppy disk and moved. When the arm 5 is lowered by a specified amount, the magnetic disk is held by an upper head 2 and a lower head 1 from the both sides. The deflected amount of a plate-shaped spring 6 is converted into the load of the heads. Thus, the heads 1 and 2 follow the movement of the magnetic disk.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk device, and more particularly to a head support mechanism for the magnetic disk device.

[0002]

2. Description of the Related Art A conventional floppy disk device (hereinafter referred to as
FDD. 3) and FIG. 4 is known as a magnetic head (hereinafter, may be simply referred to as a head) support mechanism. The head support mechanism will be briefly described below. A carriage 111 that supports a head 116 disposed on one surface (hereinafter, referred to as a lower side) of a magnetic disk, and a head 117 disposed on the other surface (hereinafter, referred to as an upper side) of the magnetic disk. An arm 112 that supports a roller via a plate-shaped spring called a roll pivot 114 is connected by a roll pivot retainer 115. Arm 11 for this carriage 111
2 is pressed by the head load spring 113, and the magnetic disk is sandwiched between the lower head 116 and the upper head 117. This support mechanism is supported by a base 118, and the arm 112 pivots vertically in a fan shape with the roll pivot 114 as a fulcrum, and head-loads the magnetic disk 120 of the inserted floppy disk 119.

[0003]

However, in such an FDD, the floppy disk 119 is stored in the F disk.
When inserting / removing into / from the DD, the case of the floppy disk 119 or the shutter part hits the head 117 and the head 1
In order to prevent the breakage of the head 17, it is necessary to secure a certain amount of escape of the head 117 from the floppy disk 119, and in the conventional head-loading method in which the conventional roll pivot 114 pivots upward in a fan shape. However, it has been difficult to thin the FDD in order to secure this relief amount. That is, as shown in FIG. 5, even if only the head portion is taken up, the head 117 is
When retreating in the direction away from 20, the height dimension H1 is enough to allow the thickness of the case 121 of the floppy disk 119 and the shutter 122 to escape, but the head 117 rotates vertically in a fan shape. , Head 11
The rear part of 7 is still at the height H2, and collides with the case 121 or shutter 122 of the floppy disk 119 that has entered. Further, as shown in FIG. 4, it is necessary for the head load spring 113 to press the arm 112 from above, which is an obstacle to thinning.

The present invention solves such a conventional problem, and an object of the present invention is to provide a magnetic disk device having a head supporting mechanism which can be made thin.

[0005]

In order to achieve the above object, the present invention provides a carriage in which a head support mechanism supports a magnetic head disposed on one surface side of a magnetic disk, and the other of the magnetic disks. It is provided with an arm for supporting the magnetic head disposed on the surface side of the disk through a plate spring, and a means for connecting the arm to the carriage and for guiding the movement in a direction perpendicular to the magnetic disk.

[0006]

According to the present invention, since the arm can be moved perpendicularly to the magnetic disk surface by the above-mentioned structure, the amount of escape of the head from the case of the floppy disk or the shutter can be set to the minimum, and the magnetic disk device can be set. Can be made thinner.

[0007]

1 is a perspective view showing a head supporting mechanism of a magnetic disk apparatus according to an embodiment of the present invention, and FIG. 2 is a sectional view of a main part thereof. 1 and 2, 1 is a lower head and 2 is an upper head. Lower head 1
Is fixed to the carriage 3, a positioning screw 7 that determines the height position of the arm 5 is rotatably attached to the carriage 3 by a stopper ring 8, and a coil spring 9 that biases the arm 5 upward. A pin 10 that guides is installed upright. The pinion 1 is fixed to the shaft portion of the positioning screw 7, and the rack 12 is engaged with the pinion 11. The upper head 2 is supported by a head supporting member 4, and the arm 5 and the head supporting member 4 are connected by a plate spring 6. The arm 5 is provided with a screw hole 5a to which the positioning screw 7 is screwed, and
The pin 10 is inserted into the guide hole 5b via the coil spring 9.

The operation of the head support mechanism constructed as described above will be described below. The positioning screw 7 that determines the height of the arm 5 does not move in the vertical direction with respect to the carriage 3 and can freely rotate.
It is performed by a pinion 11 driven by 2.
Therefore, the arm 5 screwed onto the positioning screw 7 moves up and down by the rotation of the positioning screw 7. This vertical movement is positioned at the position where the rotation is stopped by the urging force of the coil spring 9 provided between the arm 5 and the carriage 3. When a floppy disk is inserted into the FDD, the rack 12 rotates the positioning screw 7 via the pinion 11 in conjunction with the insertion amount of the floppy disk, the arm 5 is lowered by a certain amount, and the upper head 2 moves the magnetic field inside the floppy disk. When it comes into contact with the disc, the leaf spring 6
Is deflected, and the amount of deflection is converted into a head load,
The heads 1 and 2 sandwich the magnetic disk and follow its movement. The reverse operation is performed when the floppy disk is ejected.

As described above, according to the above-described embodiment, for example, the clearance from the magnetic disk surface of the conventional upper head needs to be 3.2 mm or more, whereas in this embodiment, it is 2.2 mm. It is possible to reduce the thickness of the FDD device by 1 mm or more while preventing interference between the magnetic disk and the head.

[0010]

As is apparent from the above embodiment, the present invention is provided with means for moving and guiding the arm holding the head in the direction perpendicular to the magnetic disk surface. The amount of escape of the head from the disk can be set to a minimum, and by supporting the head on the arm via a plate-like spring, it is possible to ensure the followability of the magnetic head to the magnetic disk.

[Brief description of drawings]

FIG. 1 is a perspective view showing a head support mechanism of a magnetic disk device according to an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of the head support mechanism.

FIG. 3 is a perspective view showing a head support mechanism of a conventional magnetic disk device.

FIG. 4 is an operation explanatory view of the head support mechanism.

FIG. 5 is a sectional view showing a relationship between a magnetic head and a magnetic disk of the head support mechanism.

[Explanation of symbols]

 1 Lower Head 2 Upper Head 3 Carriage 4 Head Support Member 5 Arm 6 Plate Spring 7 Height Positioning Screw 8 Stopper Ring 9 Coil Spring 10 Pin 11 Pinion 12 Rack

Claims (1)

[Claims] 1. A magnetic head in which a head support mechanism of a magnetic disk device for sandwiching a magnetic disk between two magnetic heads and performing recording and reproduction on both sides of the magnetic disk is arranged on one surface side of the magnetic disk. A carriage that supports the magnetic disk, an arm that supports a magnetic head disposed on the other surface side of the magnetic disk via a plate-shaped spring, and the arm that is connected to the carriage and that is perpendicular to the magnetic disk. And a means for guiding the movement in a direction.