JPS61230686A - Head assembly for both-side magnetic recording disk device - Google Patents

Abstract

PURPOSE:To attain the control of penetration of a magnetic disk containing a pair of magnetic cores holding the disk, by providing a control member to either one of a carriage and an opening closing arm to control the approximate position of the arm to the carriage with contact secured with the other one. CONSTITUTION:A control screw 30 is screwed into the side of a magnetic head 13 via an attachment part 15 and the head part of the screw 30 touches the rear side of an opening closing arm 20. The screwing degree of the screw 30 to the carriage 11 is controlled for control of the most approximate position of the arm 20 for the carriage 11. The head 13 when assembled is projected by a distance l from an ideal contact plane B between a floppy disk F and a magnetic head 24. When the arm 20 is closed to the head 13 by the force of a load spring 26, the disk F is pressed and bent by the head 24 and the head 13 moves down. Then the position of the arm 20 is controlled for the carriage 11 together with the control of the screwed position of the screw 30 so that the head 24 is positioned correctly on the plane B.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a head assembly for a double-sided recording magnetic disk device.

"Prior art and its problems" The head assembly of a magnetic recording device that records on both sides of a flexible magnetic disk (floppy disk) basically consists of a carriage that moves across the floppy disk, and a carriage that moves across the floppy disk. It has an opening/closing arm provided on a carriage so as to be openable/closable, and both the carriage and the opening/closing arm support magnetic heads that engage with the front and back sides of the floppy disk. The opening/closing arm is biased toward the carriage by a load spring, but before the floppy disk is inserted, it is opened by another opening mechanism, and when the floppy disk is inserted, the opening mechanism opens the opening/closing arm and releases the load spring. The force causes the magnetic head to engage with the floppy disk.

In this engaged state, the floppy disk is sandwiched between the front and back magnetic heads and is bent. It is desirable that this bending area (penetration) is not unnecessarily large and that there is no variation. However, in conventional head assemblies, variations in the spring force of spring means such as load springs,
Instability factors such as variations in the mechanical position when assembling the magnetic head to the carriage and opening/closing arm, and variations in the mounting position when attaching the opening/closing arm to the carriage so that it can be opened and closed, directly result in variations in penetration. For this reason, there is a risk that the contact between the head and the disk becomes unstable, impairing the reliability of recording and reproduction, or that the disk is scratched and the recording is destroyed.

OBJECTS OF THE INVENTION It is an object of the present invention to solve these conventional problems and provide a head assembly that can adjust the penetration of a disk by a pair of magnetic cores that sandwich the disk.

"Summary of the Invention" In order to achieve this object, the present invention specifically makes it possible to finely adjust the closed position of the opening/closing arm with respect to the carriage, that is, the position of the opening/closing arm with respect to the gear ridge when a pair of magnetic cores sandwich a disk. This system was developed based on this idea, and is characterized in that an adjustment member is provided on either the carriage or the opening/closing arm to abut the other and adjust the approach position of the opening/closing arm to the carriage.

"Embodiments of the Invention" The present invention will be described below with reference to illustrated embodiments. 1 to 3 show a first embodiment of the present invention. The gear ridge 11 moves in the direction of arrow A, that is, in the radial direction across the floppy disk F, by a guide device and a drive device (not shown).
A magnetic head 13 is attached via a flexure (plate spring) 12. The end of the carriage 11 opposite to the magnetic head 13 is a mounting part 15 for the opening/closing arm 20, and a plate spring integrally attached to the base of the opening/closing arm 20 is attached to the mounting part 15 by a fixing screw 22. 21 is fixed. The opening/closing arm 20 can be opened and closed around the handle 1 part 15 by the elasticity of the leaf spring 21.

As shown in FIG. 2, a magnetic head 24 is supported on the opening/closing arm 20 at the end opposite to the leaf spring 21 via a gimbal spring 23.

The gimbal spring 23 is a well-known spring that supports the magnetic head 24 rotatably about the circumferential axis C-C1 and the radial axis RR of the floppy disk F.

Further, a spring receiver 25 collinear with the fixing screw 22 is located at the upper part of the opening/closing arm 20.
A load spring 26 is sandwiched between the opening and closing arm 20 and the upper surface of the opening/closing arm 20. This load spring 26 presses the opening/closing arm 20 toward the carriage ll side, and the front and back sides of the floppy disk F are
It functions to bring the magnetic heads 24 and 13 into contact. This load spring 26 is stronger than the force of the flexure 12.

27 is an opening arm for opening the opening/closing arm 20 against the force of the load spring 26. The opening arm 27 engages with an opening mechanism (not shown), and the opening/closing arm 20 is normally opened when the floppy disk F is not loaded.

The present invention is characterized in that the adjustment screw 30 is screwed into the carriage 11 in the above head assembly. The adjustment screw 30 is screwed closer to the magnetic head 13 than the mounting portion 15, and its head is connected to the opening/closing arm 20.
It touches the back side.

Therefore, by adjusting the amount (height) of the adjustment screw 30 with respect to the carriage 11, the closest position of the opening/closing arm 20 to the carriage 11 can be regulated.

The height X position of the adjustment screw 30 is determined as follows. First, as shown in FIG. 3(a), the magnetic head 13 on the carriage 11 side projects by a distance from the ideal contact plane B between the floppy disk F and the magnetic head 24 in the assembled state. When the opening/closing arm 20 is closed against this magnetic head 13 by the force of the load spring 26, the load spring 26 is stronger than the flexure 12, so the floppy disk F is pushed by the magnetic head 24 and is bent, and comes into contact with the floppy disk F. The magnetic head 13 is lowered (see figure (b)
)). In the conventional device, there is no member that regulates the closed position of the opening/closing arm 20 at this time, so the magnetic head may 24 is -1- lower than the ideal contact plane B, resulting in variations in the penetration of the floppy disk F[7].

In order to set the lowered position of the magnetic head 24 to this ideal contact plane B, the present invention provides an adjustment screw 30 as shown in FIG.
Adjust the screwing position of the That is, the adjustment screw 30
Since its head abuts against the back surface of the opening/closing arm 20, the approach position of the opening/closing arm 20 to the carriage 11 can be regulated so that the magnetic head 24 is correctly positioned on the ideal contact plane B.

4 and 5 show another embodiment of the present invention, in which the present invention is applied to a head assembly in which the magnetic head 13 on the carriage 11 side and the magnetic head 24 on the opening/closing arm 20 side are supported in different ways. It is something. That is, unlike the first embodiment, the magnetic head 13 on the carriage 11 side is rotatable about the circumferential axis C-C1 and the radial axis R-R of the floppy disk F by the gimbal spring 28. It is supported by a carriage 11. On the other hand, the magnetic head 24 on the opening/closing arm 20 side is attached to the fixed plate 29.
It is completely fixed on top. The other points are the same as those of the first embodiment, including the adjustment screw 30, and the same components are given the same reference numerals and the description thereof will be omitted.

The present invention can be applied in exactly the same manner to such a manner of supporting the magnetic heads 13 and 24. That is, by adjusting the height position of the adjusting screw 30, the magnetic head 13 can be positioned on the ideal contact plane B with the floppy disk F.

In the above embodiment, the adjustment screw 30 is screwed onto the carriage II side, but even if the adjustment screw 30 is screwed in such a manner that its head abuts on the opening/closing arm 20 side, the same effect can be obtained. can be obtained. Further, an adjusting member other than the adjusting screw 30 may be provided on the carriage 11 or the opening/closing arm 20, but the adjusting screw 30 allows the easiest way to adjust the approach position of the opening/closing arm to the carriage.

"Effects of the Invention" As described above, according to the present invention, the approach position of the opening/closing arm to the carriage can be adjusted using the adjustment screw, so that the magnetic head can always be engaged with the floppy disk in a constant positional relationship. be able to. Therefore, the contact relationship between the magnetic head and the floppy disk can be made ideal, increasing the reliability of recording and reproduction, and since the magnetic head does not penetrate the disk more than necessary, the recording is not destroyed. It is possible to prevent accidents that may occur.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing an embodiment of the head assembly of the present invention, Fig. 2 is a perspective view of the opening/closing arm of Fig. 1 turned over, and Figs. 3 (a), (b), and (c). is a side view showing how the closed position of the opening/closing arm is adjusted by the adjustment screw;
4 and 5 show another embodiment of the present invention; FIG.
FIG. 2 is a perspective view similar to FIG. 2; F...Magnetic disk, 11...Carriage, 12.
...Flexiger (plate spring), 13...Magnetic head,
15... Mounting part, 20... Opening/closing arm, 21...
Leaf spring, 22... Fixing screw, 23.28... Gimbal spring, 24... Magnetic head, 25... Spring holder,
26...Load spring 26.27...Open arm, 30.
・Adjustment screw.

Claims (2)

[Claims] (1) A magnetic head that engages with both the front and back sides of the magnetic disk to perform recording and reproduction, is mounted on both a carriage that moves in a direction across a flexible magnetic disk and an opening/closing arm that is attached to this carriage so that it can be opened and closed. A head assembly for a double-sided recording magnetic disk device supporting a double-sided magnetic disk drive, characterized in that an adjustment member is provided on either the carriage or the opening/closing arm to abut on the other and adjust the approach position of the opening/closing arm to the carriage. Head assembly for magnetic recording disk devices. (2) The head assembly of a double-sided recording magnetic disk device according to claim 1, wherein the adjusting member is an adjusting screw screwed into the carriage or the opening/closing arm.