JPH0378156A - Floppy disk device - Google Patents

Abstract

PURPOSE:To keep the balance of a slider, to attain the traceability of a magnetic head for a disk, and to prevent insulation defect from occurring by arranging a fixed gimbal type magnetic head between a hard gimbal and a carriage via a cushioning material. CONSTITUTION:The cushioning material 10 is arranged between the hard gimbal 5 and a fixed arm 6, and the load center position of the slider 4 when the hard gimbal 5 is slided on a floppy disk 1 via the cushioning material 10 is set so as to be pressed with the tip of the cushioning material with an appropriate force. Thereby, a force intending to fluctuate a gap between the magnetic head 2 and the floppy disk 1 can be absorbed, and the magnetic head 2 can be slided with superior traceability in the radial direction and rotational direction of the disk. In such a way, structure in which the traceability of the magnetic head 3 for the disk 1 can be satisfied, and also, it is hard to generate the insulation defect in a coil wire can be realized.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a floppy disk device that is improved to prevent poor insulation of coil wires that occur in a magnetic head and resonance of a gimbal plate during recording, playback, and erasing. Regarding.

[Conventional technology]

In conventional floppy disk drives, the magnetic head slides on the floppy disk during access and moves in the radial direction of the disk, and during recording, playback, and erasure, it contacts the rotating floppy disk and slides relatively over the disk. However, a movable gimbal type magnetic head is used to perform the sliding movement in the radial direction and rotational direction of the disk with good followability. For example, a floppy disk device that can record on both sides of a floppy disk has a structure in which the disk is sandwiched between the slider sliding surfaces of two magnetic heads, but at least one of these two magnetic heads is mounted on a movable gimbal. For example, as shown in FIG. 3, a movable gimbal-type magnetic head 2 and a slider 4 of a fixed gimbal-type magnetic head 3 are brought into contact with side A of a floppy disk 1, and these two sliders 4.4, it has a structure in which a floppy disk 1 is inserted. In addition, in a movable gimbal type magnetic head, two points on a line that serve as the center of load for each sliding are placed on the gimbal plate around the slider (hereinafter, the gimbal plate of a movable gimbal type magnetic head is referred to as a gimbal). Two pairs of openings surrounding the gimbal are made, for example, U-shaped or arc-shaped openings that are symmetrical to each other.By opening a total of four such openings in the flexible and highly elastic gimbal, the magnetic head can be inserted into the disk. Maintains the balance of the slider when sliding relative to each other in the radial and rotational directions,
It is well known that the magnetic head achieves the ability to follow the disk.

[Problem to be solved by the invention]

Here, compared to a fixed gimbal type magnetic head, a movable gimbal type magnetic head has a gimbal plate, that is,
The drawback is that the gimbal has a complicated aperture shape, and the complicated process for creating such a complicated aperture in the gimbal reduces productivity and increases costs. In addition, as shown in FIG. 3, a movable gimbal type magnetic head 2
A fixed limb 6 is arranged perpendicularly to the gimbal 5' on the back side separating the floppy disk 1 of the gimbal 5', and adjusts the load center position of the slider 4 appropriately when sliding on the floppy disk 1 of the gimbal 5'. By pressing the tip with a certain amount of force, vibrations of the gimbal 5' when the magnetic head slides are absorbed, and the tracking performance when the magnetic head slides on the disk is improved. Even if the followability of the magnetic head to the disk is satisfied in this way, when the movable gimbal type magnetic head 2 and the fixed gimbal type magnetic head 3 slide pairwise in the radial direction and rotational direction of the floppy disk l, Each slider of 4.4
When recording and reproducing while maintaining the balance of the movable gimbal type magnetic head 2 and the fixed gimbal type magnetic head 3 with respect to the floppy disk 1, there is a slight difference between the gimbal 5' of the movable gimbal type magnetic head 2. There are also drawbacks such as resonance etc. occurring due to the difference in shape, and recording/reproducing waveforms becoming blurred, resulting in a decline in the functionality of the floppy disk device. Further, as shown in FIG. 3, an FPC (flexible printed circuit) 7 is provided on the back side of the gimbal 5' of the movable gimbal magnetic head 2, which separates the floppy disk 1, and this FPC 7 has a read/write core and an erase core, respectively. A coil wire is connected to the wound coil (in Fig. 3, one core 8, coil 9, and coil wire 9a are connected to each other).
), but during this connection, the edges of the gimbal plate, especially the openings 5' a, 5' b, 5' made in the gimbal 5' of the movable gimbal type magnetic head 2
There may also be a problem that the coil wire 9a hits the edges of c and 5' d, causing the insulation film covering the coil wire to peel off, resulting in poor insulation. Therefore, the present invention improves the disadvantages of the conventional floppy disk device, such as the high cost and vibration of the gimbal plate when the magnetic head slides, which are caused by the use of the movable gimbal type magnetic head. It is an object of the present invention to provide a floppy disk device with a structure that prevents insulation defects from occurring.

[Means to solve problems] The present invention provides a fixed gimbal type magnetic head in which a fixed gimbal type magnetic head is disposed on a carriage with a cushion material interposed between the hard gimbal of the fixed gimbal type magnetic head and the carriage, instead of the gimbal shape conventionally used in a movable gimbal type magnetic head. This achieved the above objectives. [For use]

According to the configuration of the present invention, the gimbal plate of the fixed gimbal type magnetic head, that is, the cushion material between the hard gimbal and the carriage absorbs the force that attempts to change the distance between the magnetic head and the floppy disk. However, when the magnetic head slides relative to each other in the disk radial direction and rotational direction, the magnetic head slides with good followability.

【Example】

The present invention will be specifically explained below by showing examples with reference to the drawings. FIG. 1 shows an example of the assembly of the magnetic head of the floppy disk device of the present invention. In this magnetic head assembly, a fixed gimbal type magnetic head 3 is used in place of the movable gimbal type magnetic head 2 shown in FIG. 4 are in contact with each other, and the floppy disk 1 is sandwiched between these two sliders 4.4. In the floppy disk device shown in FIG. 1 as well, the fixed limb 6 is disposed on the back side of the gimbal plate that separates the floppy disk by one.
In the floppy disk device shown in the figure, the space between the hard gimbal 5 and the fixed limb 6 is made of elastic materials and elastic bodies such as silicone rubber, springs, flexible resins such as UV resin (ultraviolet curing resin), and foamed plastics such as urethane foam. Cushion material ■0 is arranged, and this cushion material I
The center position of the load of the slider 4 when the hard gimbal 5 slides on the floppy disk 1 is pressed by the tip of the slider 4 with an appropriate force. This cushioning material 10 also separates the floppy disk 1 from the center and four corners of the back side of the floppy disk 1 as shown in FIG. The height of the connection part of the coil wire 9a, that is, FP
If the thickness or height exceeds the sum of the thickness of C7, the thickness of the coil wire 9a, and the bending of the connecting portion of the coil wire 9a, it will be pasted or joined, for example, as shown in Figures 2a and 2. The coil 9 etc. that protrudes from the back side of the hard gimbal 5 of the fixed gimbal type magnetic head 3 can penetrate through it.
Opening 11a and FP large enough to be covered by dodimbar 5
The fixed gimbal type magnetic head 3 is fixed to the carriage 11 by being fixed or bonded to a predetermined position of the carriage 11 provided with the groove 11b that fits with the C7. The floppy disk device of the above embodiment has a gimbal plate of a fixed gimbal type magnetic head with a cushion material,
In other words, it has a structure in which stones are attached to the center and four corners of the back side of the hard gimbal, and this cushioning material is used to protect the fixed gimbal type magnetic field when the magnetic head moves during access and when the floppy disk rotates during recording, playback, and erasure. It is sufficient that the balance of the slider of the head is maintained. For example, stones or stones may become clogged or bonded only at the four corners, or instead of at the four corners, stones or stones may form at two points near each end along the disk radial direction and rotational direction. The floppy disk device of the present invention can be modified in various ways within the scope of the claims, such as being joined together.

【Effect of the invention】

As is clear from the above embodiments, the floppy disk drive of the present invention is capable of attaching the fixed gimbal type magnetic head to the fixed gimbal type magnetic head by interposing the gimbal plate of the fixed gimbal type magnetic head, that is, the gimbal plate of the fixed gimbal type magnetic head, and the carriage with a cushion material between the gimbal and the carriage. l) - The gimbal plate has a movable gimbal type magnetic head with a gimbaled magnetic head that slides m pairs in the disk radial direction and rotational direction. There are no two pairs of openings to maintain the balance of the slider and to achieve the trackability of the magnetic head to the disk. Therefore, when connecting the coil wire to the FPC during the manufacturing of the magnetic head, the coating of the coil wire does not cover these openings. Insulation failures that may occur due to contact with edges and peeling are prevented. In addition, if cushioning material with approximately equal elasticity, such as restoring force and restoring response, is placed at at least four points on the back side of the hard gimbal that separates the floppy disk, this cushioning material can be used when the magnetic head moves during access and during recording. The vibration of the slider when the floppy disk rotates during reproduction and erasure is absorbed, and therefore the resonance of the gimbal plate when the magnetic head slides is prevented. As described above, the fixed gimbal type magnetic head has better productivity than the movable gimbal type magnetic head because the opening shape of the gimbal plate is simpler. It can be manufactured at a lower cost than conventional floppy disk devices that use heads.

[Brief explanation of drawings]

FIG. 1 is a partial side view showing an example of the magnetic head assembly part of the floppy disk device of the present invention, and FIGS. 2a and b are both views of the floppy disk device of FIG. The magnetic head assembly shows the state of the parts. Figure 2a is a perspective view of the fixed gimbal type magnetic head seen from the back side of the gimbal plate that separates the floppy disk, and Figure 2 shows the fixed gimbal type magnetic head. FIG. 3 is a perspective view of the gimbal plate when viewed from the floppy disk side. FIG. 3 is a partial side view showing an example of a part where a magnetic head is assembled in a conventional floppy disk device. 1... Floppy disk, 2... Movable gimbal type magnetic head, 3... Fixed gimbal type magnetic head, 4...
...Slider 5...Hard gimbal, 5'...
Gimbal, 5' as 5' b, 5' c, 5
' d...Opening, 6...Fixed limb, 7...FPC
(Flexible print circuit), 8..., 9... Coil, 9a... Coil wire, 10... Cushion material,
11... Carriage, 11a... Opening, llb...
·groove.

Claims (1)

[Claims] 1. A floppy disk device characterized in that a fixed gimbal magnetic head is disposed on a carriage with a cushion material interposed between the hard gimbal of the fixed gimbal magnetic head and the carriage.