JPS62121958A - Floppy disk device - Google Patents

Abstract

PURPOSE:To satisfactorily retain the contact of a core part and to substantially improve the trackability of a head by giving the prescribed inclination angle to media and fitting the slid surface of a movable head so as to push the media. CONSTITUTION:In keeping the prescribed inclination angle theta, the media slid surface of the 1st head (movable head) is fitted on a gimbal 3 so that the media radius direction tip (core part) can be positioned below the end surface of the slid surface with respect to the media slid surface of the 2nd head (fixed head). Then a head pressure spring 7 applies a fixed pressure to hold the head 1 in parallel. Accordingly pressure corresponding to the inclination angle is additionally applied to the media, and the contact of the core part can be satisfactorily held. Thus the head can execute the stable following action against fluctuation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a floppy disk drive using a double-sided floppy disk as a recording medium, and particularly to a floppy disk device having a unique head mounting structure.

[Technical background of the invention and its problems] Floppy disk drives (hereinafter referred to as FDD) are widely used as external storage for information processing equipment. In this FDD, a head for reading and writing from and to a medium (floppy disk) and mechanical parts around the head are important components. Especially in recent years, with the increasing density of recording surfaces,
Needless to say, reading and writing from the head greatly affects reliability.

FD that handles double-sided floppy disks targeted by the present invention
D has a configuration in which heads are placed above and below the medium with the medium in between, and each of the upper and lower recording surfaces is read and written respectively.

A conventional head structure of this type of FDD is shown in FIG. In FIG. 3, 01 is a movable head provided corresponding to the recording section on one side of the disk, and is herein referred to as the S1 head. 02 is a fixed head provided corresponding to the recording section on one side of the lower side of the disk, and is herein referred to as an SO head. 03 is the gimbal, 04 is the arm of S1 head 01, 0
5 is an arm of the SO head 02.

Here, the S1 head 01 and the SO head 02 are adjusted so that their disk sliding surfaces are parallel to each other at the time of contact.

When driving a disk, S1 head 01 and SO head 0
Since there is a media between the two, a gap will be created by the thickness of the media. Although this is absorbed to some extent by the upward shift of the arm 04 and the gimbal 03, an upward force acts on the tip of the S1 head 01 in the disk radial direction. Therefore, due to undulations and other fluctuations during the rotation of the media, the tip of the S1 head 01 in the radial direction of the disk tends to float above the disk surface. At this time, the read/write section (core section) of the S1 head 01 is located at the tip in the radial direction of the disk, and for this reason, in the past, the head's tracking ability with respect to the media was poor, and malfunctions due to deterioration of compliance occurred. There was a problem that it was easy to occur.

C. Purpose of the Invention] The present invention was made in view of the above-mentioned circumstances, and aims to maintain good contact between the read/write portion (core portion) of the head and the disk surface, improve the followability of the head to the disk, and thereby improve reliability. An object of the present invention is to provide a floppy disk device that can ensure high performance.

[Summary of the Invention] The present invention provides a first head (for example, a movable head) provided with a disk sliding contact surface corresponding to a recording portion on one side of the upper side of a double-sided floppy disk, and a sliding contact surface of the first head (for example, a movable head) provided corresponding to a recording portion on one side of the lower side of the disk. The second head (for example, a fixed head) is attached at a predetermined inclination angle to the disk sliding surface of the second head (for example, a fixed head) so that the radial tip of the disk (read/write part; core portion) is located below the rear end of the sliding surface. With this structure, it is possible to always maintain good contact between the read/write part (core part) of the head and the disk surface, and the tracking performance of the head is greatly improved, resulting in reliable operation. Can be secured.

[Embodiments of the invention] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing the configuration of essential parts in an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a first head (here, a movable head) provided corresponding to the recording section on one side of the upper side of the medium (disc), and is hereinafter referred to as the S1 head. Reference numeral 2 denotes a second head (here, a fixed head) provided corresponding to the lower one-sided recording section of the medium, and is hereinafter referred to as an SO head. 3
is a gimbal that fixes the S1 head 1 to the arm and absorbs unnecessary external pressure applied to the S1 head 1. 4
is the arm of S1 head 1, and here S1 head 1
A constant pressure (approximately 18 g) is applied between the SO head 2 and the SO head 2 by a head pressure spring 7.

5 is an arm of the SO head 2, the end of which is fixed to the belt of the step motor. 7 is S1 as mentioned above
A head pressure spring applies a pressure of about 180 degrees between the head 1 and the SO head 2, and 8 is a leaf spring that supports the arm 4 rotatably about the 0 part as a fulcrum.

Here, the media sliding surface of the 81 head 1 is the S
The media is attached to the gimbal 3 at a predetermined inclination angle (θ) with respect to the media sliding surface of the O-head 2 so that the media radial tip (core portion) is located below the rear end of the media sliding surface.

Figure 2 shows the state of the head during drive operation when a medium is actually loaded in the above embodiment. The intervening media, Pl, is the read/write position of SO head 2! (core position), P2 is the read/write position (core position) of the S1 head 1.

In the above configuration, when no head pressure is applied, S1
An inclination angle (θ; specifically, θ-1° to 3°) as shown in Fig. 1 is maintained between the head 1 and the SO head 2, but during actual drive operation, As shown in FIG. 2, the media sliding surface of S1 head 1 is SO
It becomes parallel to the media sliding surface of the head 2 with the media (M) sandwiched therebetween by a predetermined head pressure.

At this time, the read/write part (core part) of the S1 head 1 is located at the tip of the medium (M) in the radial direction (insertion/ejection direction of the medium (M)), but as described above (the S1 head 1 is By tilting it in a corresponding state, the contact between the head tip, that is, the read/write part, with the media (M) will be affected by the pressure applied by the tilt, compared to the conventional mounting structure described above. can be stably followed.

As this evaluation method, [Compliance-AI/A
2 x 100%] (where A1 - output value, A2 - output value when pressure 5Q is intentionally applied to S1 head 1), the compliance measurement value (81 head, 2F data) is the same as the conventional one. It was improved by 12% (approximately 80% → 90%) compared to .

As mentioned above, the media sliding surface of the S1 head 1 is
A predetermined inclination angle (
By adopting a structure in which the head is attached at an angle of θ), the contact between the head and the media is good, and the followability can be greatly improved. This allows the signals (data) written on the medium to be read faithfully, and the data signals to be written faithfully, thereby reducing the frequency of errors and improving reliability.

Furthermore, by using a cushioning material such as damper rubber to create the above-mentioned angle (θ) between the 81 head and the gimbal for existing disk drives, the present invention can be easily achieved including the effect of countering resonance. can be realized.

In the above-mentioned embodiment, the floppy disk device uses a movable head as the head provided corresponding to the recording section on one side of the upper side of the medium, and a fixed head as the head provided corresponding to the recording section on the lower side of the medium. In this case, the movable head is given a predetermined inclination, but for example, the head provided corresponding to the recording section on one side of the upper side of the medium is a fixed head, and the head provided corresponding to the recording section on the lower side of the medium is a movable head. In a floppy disk device using a head, the fixed head may be configured to have a predetermined inclination similar to the above embodiment.

[Effects of the Invention] As detailed above, according to the floppy disk device of the present invention, the disk sliding surface of the first head provided corresponding to the upper single-sided recording section of the double-sided floppy disk is connected to the lower side of the disk. With respect to the disk sliding contact surface of the second head provided corresponding to the recording section, the disk is tilted at a predetermined angle so that the radial tip of the disk (read/write section; core section) is located below the rear end of the sliding contact surface. The attached structure allows good contact between the read/write part (core part) of the head and the disk surface to be maintained at all times, and the tracking performance of the head is greatly improved, ensuring highly reliable operation. can.

[Brief explanation of drawings]

FIG. 1 is a side view showing the configuration of essential parts in an embodiment of the present invention, and FIG. 2 shows the head state during drive operation when a medium is actually loaded in the above embodiment. 3 are side views showing the structure of a conventional head attachment. 1... Movable head (81 head), 2... Fixed head (So head), 3... Gimbal, 4.5... Arm, 7... Head pressure spring, 8... Leaf spring . Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] In a floppy disk device that uses a double-sided floppy disk as a recording medium, a first head that is provided corresponding to a recording section on one side of the upper side of the disk is provided with a sliding contact surface of the first head corresponding to a recording section on one side of the lower side of the disk. A floppy disk device having a structure in which the disk is attached at a predetermined inclination angle to the disk sliding surface of a second head such that the radial tip of the disk is located below the rear end of the sliding surface.