JPS6349881Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flexible magnetic disk head device that is relatively easy to assemble and allows smooth insertion of magnetic disks.

A magnetic disk device, generally referred to as a floppy disk device, is constructed so that a flexible magnetic disk contained in a jacket, that is, a disk enclosure, can be inserted and removed in a plane direction that is the same as or almost parallel to the plane of rotation of the disk. There is. The head device of this disk device is constructed by fixing a resin-molded button-shaped magnetic head to a support base that can be moved in the radial direction of the disk, and the gap surface is flush with the resin mold surface. ing.
That is, the gap surface does not protrude from the resin mold surface. Therefore, there is little possibility that the magnetic head will interfere with the attachment and detachment of the disk. However, since resin molding technology is used, assembly of the head device is troublesome.

By the way, when both sides of a disk are used for recording and playback at the same time, it is necessary to hold the magnetic disk between the heads on both sides without providing pads, but conventionally one magnetic head was fixedly placed. , the head did not hit the magnetic disk very well. To solve this drawback, it is desirable to support both heads with gimbal springs. However, since the configurations of the gimbal support head and conventional resin molded heads are fundamentally different, it has been practically impossible to transfer the parts and assembly process of the gimbal support head to the resin molded head.

SUMMARY OF THE INVENTION An object of the present invention is to provide a flexible magnetic disk head device that is relatively easy to assemble and allows smooth disk insertion.

To achieve the above object, the present invention provides a head device for a magnetic disk device in which recording or reproduction is performed by inserting a flexible magnetic disk or a jacket containing the same from a plane direction that is the same as or approximately parallel to the rotation plane of the flexible magnetic disk. a magnetic head for recording or reproducing signals by slidingly contacting the disk; and a magnetic head configured to support the magnetic head and move in the radial direction of the disk, and for allowing displacement of the magnetic head. a head support base provided with a hole; the magnetic head is mounted at the center so that the recording or reproducing gap surface of the magnetic head protrudes from the main surface of the head support base; is fixed around the hole of the head support base, and is a non-gimbal-shaped head that does not include a portion for rotating the magnetic head in a radial direction of the disk and in a direction perpendicular to the radial direction. It has a support plate and an opening that slightly protrudes the gap surface of the magnetic head, is formed to cover the magnetic head and the head support plate, and guides the disk or the jacket containing the same to a predetermined position. and a cover attached to the head support base and having an inclined outer circumferential surface for controlling the head.

The present invention has the following effects.

(a) Since the head support plate is constructed in a non-gimbal shape, the head support plate is unlikely to be damaged or deteriorated even if a disk or jacket collides with the magnetic head.

(b) The combination of the inclined outer peripheral surface of the cover and the non-gimbaled head support plate makes it possible to insert the disk extremely smoothly.

(c) Since the magnetic head is supported by a non-gimbaled head support plate, track deviation is reduced.

(d) Since the magnetic head is not directly fixed to the head support base, but is mounted using a head support plate,
It becomes possible to use the same head support base for gimbal support, and costs can be reduced.

Next, embodiments of the present invention will be described with reference to the drawings.

The head portion of the floppy disk device according to the embodiment of the present invention shown in FIGS. 1 to 6 is for recording or reproducing data using the floppy disk 1 shown in FIG. 7. The floppy disk 1 shown in FIG. 7 includes a flexible magnetic disk 3 having a hole 2 in the center, and a paper jacket 4 for housing the flexible magnetic disk 3.
The jacket 4 is provided with an opening 5 for bringing the magnetic head into sliding contact with the disk 3, an opening 6 for holding the magnetic disk 3 between a turntable and a clamper, and the like. The other main surface of the jacket 4 is also formed in the same pattern.

The head device consists of a head support stand 7, a head support plate 8, a magnetic head 9, and a shield cover 10, as is most obvious from FIG. Of these, the head support stand 7 is a synthetic resin reciprocating stand generally called a carriage, and is used to send the head 9 in the radial direction of the disk 3 along the opening 5 of the jacket 4 shown in FIG. and is connected to the feed drive mechanism. Furthermore, this support stand 7 has a head 9.
A circular through hole 13 is provided for accommodating the coil portion 11 and lead wire 12, etc., and a ring-shaped protrusion 26 is provided for positioning the head support plate 8 and the shield cover 10. 8
It has an arm 7a that determines the lower limit of . In the case of a gimbal support type head, this arm 7a is
Acts as a fulcrum for gimbal support.

The head support plate 8 is a metal disk having no gimbal spring properties, and fixedly supports the magnetic head 9 so that the magnetic head 9 protrudes from its main surface, and is designed to close the through hole 13 of the support base 7. It is fixed to the support stand 7.

The magnetic head 9 holds a core 14 having a gap with a holder 15, and a coil 11 is attached to the core 14.
It is wound. Note that both ends 16 and 17 of the holder 15 on the disk radial direction are chamfered. Further, for convenience of illustration, both a recording/reproducing head and an erasing head are provided, although they are not shown separately in detail.

The shield cover 10 is made of silicon steel plate,
It has an opening 18 in its center for exposing the gap surface 9a of the head 9, and further has outer circumferential surfaces 20, 21 inclined toward the top surface 19 having the opening 18. This shield cover 10 is positioned by the outer peripheral edge of the ring-shaped protrusion 26 of the support base 7.
is fixed to. The positional relationship between the cover 10 and the head 9 is determined such that the gap surface 9a slightly protrudes from the top surface 19 of the cover, as is clear from FIGS. 2 and 3.

The magnetic head device constructed as described above is generally used in a floppy disk device of a single-sided recording/reproducing type. FIG. 6 shows this state of use, in which the floppy disk 1 with the jacket 4 is inserted parallel to the gap surface 9a, and the opening 5 of the jacket 4 is used to insert the floppy disk 1 onto one side of the magnetic disk 3. The gap surface 9a of the head 9 is brought into contact with the magnetic disk 3, and the other surface of the magnetic disk 3 is pressed with the pad 22 to obtain an appropriate contact pressure to perform recording or reproduction.
At this time, of course, the magnetic disk 3 is rotated by a disk rotating device to generate a relative scanning motion between the head 9 and the disk 3. When attaching or detaching the floppy disk 1, rotate the arm 23 as shown by the arrow 24 in order to separate the pad 22 from the head 9, thereby creating the necessary gap between the pad 22 and the head 9. The disc 1 is moved parallel to the gap surface 9a as shown by the arrow 25.

As is clear from the above, the head device of this embodiment has the following advantages.

(a) Since it is constructed by assembling the support base 7, support plate 8, magnetic head 9, and cover 10, assembly can be accomplished relatively easily.

(b) Since the cover 10 is made of a shielding material, there is no need to provide a special shielding mechanism, and the configuration is simplified.

(c) Since the cover 10 is provided with inclined surfaces 20 and 21 for guiding the disk 1, even when the disk 1 is attached or removed in a direction that collides with the head 9, the inclined surfaces 20, 21 The disk 1 is guided upward by the head 21, and there is no situation where the head 9 interferes with the attachment and detachment of the disk 1. Furthermore, damage to the head 9 is prevented.

(d) Since the gap surface 9a of the head 9 is made to protrude slightly from the cover 10, the pad 22 and the head 9
A state is obtained in which the magnetic disk 3 is held between the magnetic disk 3 and the magnetic disk 3, making it possible to keep the contact area of the head portion with the magnetic disk 3 to a minimum.

(e) Since the ring-shaped protrusion 26 is provided on the support base 7, it becomes possible to accurately position the support plate 8 and the cover 10.

(f) Since the ends 16 and 17 of the gap surface 9a are chamfered, it is possible to smoothly attach and detach the disk 1.

Although the embodiments of the present invention have been described above, the present invention is not limited thereto and can be further modified. For example, the outer peripheral surface of the cover 10 may have a conical shape. Further, if a shield is not required or provided separately, the cover 10 may be formed of synthetic resin or the like. Further, the shield cover 10 may be formed of another magnetic material such as permalloy. Alternatively, the configuration may be such that the arm 7a having the fulcrum is omitted. It is also applicable when the jacket 4 is not used. Furthermore, the support base 7 may be arm-shaped or block-shaped. Further, the support stand 7 may be movable in a direction other than the radial direction of the disk.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a head device according to the present invention;
2 is a front view of the head device shown in FIG. 1, FIG. 3 is a sectional view taken along the - line in FIG. FIG. 6 is a front view showing the head device in use, and FIG. 7 is a plan view showing the floppy disk. In the symbols used in the drawings, 1 is a floppy disk, 3 is a magnetic disk, and 7 is a head support stand.

Claims (1)

[Claims for Utility Model Registration] A head device for a magnetic disk device that performs recording or reproduction by inserting the disk or a jacket containing the same from a plane direction that is the same as or almost parallel to the rotation plane of the flexible magnetic disk. a magnetic head for recording or reproducing signals by slidingly contacting the disk; and a hole formed to support the magnetic head and move in the radial direction of the disk, and for allowing displacement of the magnetic head. The magnetic head is mounted at the center so that the recording or reproducing gap surface of the magnetic head protrudes from the main surface of the head support, and the peripheral edge of the magnetic head is attached to the head support. a non-gimbal-shaped head support plate that is fixed around the hole of the support base and does not include a portion for rotating the magnetic head in a radial direction of the disk and in a direction orthogonal to the radial direction; , which has an opening that slightly protrudes the gap surface of the magnetic head, is formed to cover the magnetic head and the head support plate, and is for guiding the disk or the jacket containing the disk to a predetermined position. a cover having an inclined outer peripheral surface and attached to the head support base.