JPH03214460A - Magnetic head supporting device - Google Patents

Abstract

PURPOSE:To prevent abnormal attraction from occurring even when a disk is abutted with the front edge of the inflow tapered part of a supporter by providing a notch to secure the inflow of an air current from an upstream side in the rotating direction of the magnetic disk at the inflow tapered part of the supporter. CONSTITUTION:Even when warpage exists in the disk 10 and the disk 10 is abutted with the front edge 6a of the inflow tapered part 6 of a supporting plate 3 due to excessive flexibility, the inflow of the air current from the upstream side in the rotating direction of the disk can be secured since the notch 8 is provided at the inflow tapered part 6 in this magnetic head supporting device, and no abnormal attraction occurs. In other words, the inflow of the air current to the tapered part 6 can be secured, and positive pressure can be surely generated at a protrusive plane part 5, which pushes up the disk 10.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head support device used in a magnetic disk drive device that records/reproduces information on/from a disk-shaped magnetic recording medium.

[Prior Art] A magnetic disk storage device that records/reproduces information on a disk-shaped magnetic recording medium (hereinafter referred to as a disk) is an external storage device for information processing devices such as computers and word processors. It is now widely used as a device.

One of these information processing devices records/records still image signals.
There is a device called a still video disc drive for playback. This disk moving device is mounted on a still video floppy camera, and is configured to record image information on the still video floppy disk by operations similar to those of a camera device using photosensitive film.

FIG. 3 shows an example of a magnetic head support device used in this type of still video floppy disk drive device, which is composed of a magnetic head 1 and a support body 2 that supports this magnetic head 1. has been done. The support body 2 includes a support plate 3 formed into a substantially rectangular shape in plan view, and a base 4 adhered to the lower surface of the support plate 3, and is attached to a carriage (not shown) via the base 4. On the upper surface of the support plate 3, there is a protruding surface portion 5 consisting of a flat surface having a substantially C-shape in plan view, and a protruding surface portion 5 in the disk rotation direction (direction of arrow R) i:. An inflow taper part 6 whose front edge on the flow side is tapered by cutting downward at an angle of 2 degrees with respect to the protrusion part 5, and an inflow taper part 6 which is surrounded on three sides by the protrusion part 5 and which faces the flow side in the direction of disk rotation. An open concave portion 7 is formed, and the magnetic head 1 supported within the concave portion 7 is fixed such that its gap forming surface 1a protrudes slightly (for example, about 30 μIn) beyond the protruding surface portion 5. has been done.

The magnetic head support device configured as described above allows the disk 10 to move at high speed when a flexible disk 10 with a diameter of 2 inches, also called a still video clip disk, is loaded onto the turntable of the agitating device. It faces the support plate 3 in a rotated state. As a result, an airflow is generated along the surface of the disk 10, and when the airflow flows into the inflow taper section 6 at the front edge of the support plate 3, the flow path formed between the disk 10 and the inflow taper section 6 ends. Positive pressure is generated due to the narrowing, and the airflow flowing from the inflow taper portion 6 to the portion 5a on the upstream side in the disk rotation direction of the protruding surface portion 5 is caused to flow into the concave portion 7.
When this happens, the distance between the disk 10 and the support plate 3 suddenly widens, and the pressure decreases. In other words, the upstream portion 5 of the protruding surface portion 5
a functions as a positive pressure generating surface, and the concave portion 7 functions as a negative pressure generating surface. In addition, the airflow flowing from the inflow taper portion 6 to both side portions 5b of the protrusion portion 5 along the disk rotation direction is as follows.
The disk 10 flows downstream on the flat surface and generates positive pressure, and eventually the disk 10 is attracted toward the bottom of the concave portion 7 and becomes depressed in a concave shape, generating tension. On the other hand, since the magnetic head 5 protrudes a certain amount from the protruding surface portion 5, the concave disk 10 is pushed upward by that portion, and the gap forming surface 1a is brought into close contact with the recording surface of the disk 10. This makes it possible to apply a desired load pressure to the magnetic head 1. [Problem to be solved by the invention] By the way, some commercially available disks are warped or have too much flexibility. When such a disk is attached to a drive device and rotated, the disk 10 comes into contact with the front edge 6a of the inflow taper section 6, and the flow path narrows at the end, as shown in FIG. A channel that widens toward the end may be formed at the cleavage location. When such a reverse taper phenomenon occurs in the inflow taper part 6, the airflow cannot flow into the surface of the support plate 3, and an abnormal adsorption occurs in which negative pressure is generated in the inflow taper part 6 and the protrusion part 5, and the head The touch becomes so bad that it becomes impossible to write or read signals.

The present invention has been made in view of the above circumstances, and its purpose is to provide a highly reliable magnetic head support device that does not cause abnormal adhesion even when a disk comes into contact with the leading edge of the inflow taper portion of the support. It's about doing.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a magnetic head for writing and/or reading signals on a flexible disk, and a magnetic head on the upstream side in the rotational direction of the disk. An inlet tapered portion is provided at the front edge of the disc, a recessed portion is provided downstream of the inlet tapered portion, and a support body for supporting the magnetic head is provided within the recessed portion. In the magnetic head support device, the magnetic head is brought into contact with the disk in such a way that airflow flowing into the surface of the support body generates negative pressure within the recessed portion, and the inflow taper portion is provided with an air flow on the upstream side in the rotational direction of the disk. We decided to provide a cutout to ensure the inflow of airflow from the

[Operation] According to the above means, even when the disk comes into contact with the front edge of the inflow taper section, the airflow flows into the inflow taper section through the notch, so the disk is immediately pushed up, and therefore the inflow taper section The reverse Taber phenomenon in the area is instantly resolved,
There is no need to worry about abnormal adsorption.

[Example] An example of the present invention will be described below with reference to FIGS. 1 and 2. Here, FIG. 1 is a plan view of the magnetic head support device, and FIG. 2 is an explanatory diagram of its main parts, and parts corresponding to those in FIGS. 3 and 4 described above are given the same reference numerals. be.

As shown in FIG. 1, this magnetic head support device includes an inlet tapered portion 6 in which a pair of notches 8 are carved in the L surface of the support plate 3.
A protruding surface portion 5 consisting of a flat surface having a substantially C-shape in plan view, and a recessed portion 7 surrounded on three sides by the protruding surface portion 5 and having an open downstream side in the disk rotation direction (direction of arrow R) are formed. The magnetic head 1 is supported and fixed within this concave portion 7. Therefore, when the disk is rotated at high speed at a position facing this support plate 3, airflow flows into the upper surface of the support plate 3 through the inflow taper part 6, and positive pressure is generated at the protrusion part 5, as in the conventional example. At the same time, negative pressure is generated in the recessed portion 7.

Even when the disk 10 comes into contact with the front edge 6a of the inflow taper section 6 as shown in FIG. 2 because the disk is warped or has too much flexibility, this magnetic head support device Since the inflow taper portion 6 is provided with the notch 8, the inflow of airflow from the upstream side in the direction of rotation of the disk is ensured, and abnormal adsorption of the disk, which has been a problem in the past, is prevented from occurring. That is, in the conventional example, when the disk comes into contact with the front edge of the inflow taper part and the reverse Taper phenomenon occurs,
Since the airflow is no longer able to flow in, negative pressure is generated in the inflow taper section that generates positive pressure and the protruding surface section downstream thereof, which causes abnormal adsorption of the disk, but in the above embodiment, the second As shown by the arrow in the figure, the airflow can reliably flow in through the notch 8, so even if the disk 10 comes into contact with the front a6a of the inflow taper section 6, the disk 10 will be pushed up immediately. The reverse taper phenomenon is instantly eliminated. This prevents abnormal suction in which negative pressure is generated at a location where positive pressure should be generated, and a good head touch can always be expected.

Other than that, the configuration of the parts of the above embodiment that are not particularly explained are the same as those of the conventional example.

In the above embodiment, notches 8 are provided at two locations in the inflow taper portion 6.
However, one or three or more notches 8 may be provided, and it is preferable that the number of the notches 8 and the locations where they are formed are appropriately selected depending on the shape of the support plate 3.

[Effects of the Invention] As explained above, according to the present invention in which a notch is provided in the inflow taper portion of the support, even when the disk comes into contact with the front edge of the inflow taper portion, the inflow taper portion is provided with a notch. Since the inflow of airflow into the inflow taper part is ensured, the reverse taper phenomenon is instantly eliminated, and therefore abnormal adhesion, where negative pressure is generated at a location where positive pressure should be generated, does not occur, resulting in a highly reliable magnetic head. A support device can be provided.

[Brief explanation of drawings]

1 and 2 relate to one embodiment of the present invention, FIG. 1 is a plan view of a magnetic head support device, FIG. 2 is an explanatory diagram of the main part thereof, and FIGS. 3 and 4 are related to a conventional example. 3 is a perspective view of the magnetic head support device, and FIG. 4 is an explanatory view showing a state in which the disk is in contact with the front edge of the inlet tapered portion. 1...Magnetic head, 3...Support plate, 5...
... Protruding surface portion, 6 ... Inflow taper portion, 6 a ... Leading edge, 7 Concave portion, 8 ... Notch, 10 ... Disc. Figure 1 12 Figure 4 et al. 3 Figure 1a

Claims (1)

[Claims] A magnetic head that writes and/or reads signals to and from a flexible magnetic disk, and an inlet tapered portion provided at the front edge on the upstream side in the rotational direction of the magnetic disk, and provided on the downstream side of the inlet taper portion. A concave portion is provided, and a support body for supporting the magnetic head is provided in the concave portion, and when the magnetic disk rotates, airflow flowing into the surface of the support body via the inflow taper portion generates a negative pressure in the concave portion. In the magnetic head support device for bringing the magnetic head into contact with the magnetic disk in such a manner that the magnetic head is brought into contact with the magnetic disk, the inflow taper portion is provided with a notch for ensuring the inflow of airflow from the upstream side in the rotational direction of the magnetic disk. Characteristic magnetic head support device.