JPH03214459A - Magnetic head supporting device - Google Patents

Abstract

PURPOSE:To surely generate positive pressure at the protrusive plane part of a supporter and to improve reliability by providing a recessed groove in which an upstream side is set as aperture end at both side parts of the protrusive plane part on the surface of the supporter. CONSTITUTION:When a disk is rotated at high speed at a position confronting with a supporting plate 3, an air current flowing in from the upstream side in a rotational direction to both side parts 5b of the protrusive plane part 5 via an inflow tapered part 6 is introduced to the recessed groove 8, and surely passes through to a downstream side. Therefore, the positive pressure can be surely generated at both side parts 5b. Also, the air current flowing in to the upstream side part 5a of the protrusive plane part 5 via the inflow tapered part 6 generates the positive pressure, and generates negative pressure at a recessed part 7.

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 drive device that records/reproduces information on a disk-shaped magnetic recording medium (hereinafter referred to as a disk) is an external storage device of an information processing device such as a computer or a word processor. It is now widely used as

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 records 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 disc drive device, which is composed of a magnetic head 1 and a support 2 that supports the magnetic head 1. ing. This support body 2 consists of 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 part 5 made of a flat surface having a substantially C-shape in plan view, and a front twill part on the upstream side in the disk rotation direction (direction of arrow R) is positioned downward at an angle of 2 degrees, for example, with respect to the protruding surface part 5. An inflow taper part 6 is formed by cutting off the inflow part 6 to form a tapered surface, and a gate recess part 7 surrounded on three sides by the protruding part 5 and opening the downstream side in the disk rotation direction is formed. The magnetic head 1 is fixed such that its gap forming surface 1 +i protrudes from the protruding surface portion 5 by a slight amount (for example, about 30 μm).

The magnetic head support device configured as described above is a 2-inch diameter iJ, also called a still video disc.
When the flexible disk 10 is loaded onto the turntable of the motion device, the disk 10 faces the support plate 3 while rotating at high speed. As a result, disk 10
An air current is generated along the surface of the support plate 3.
When the flow flows into the inflow taper section 6 at the edge, the flow path formed between the disk 10 and the inflow taper section 6 narrows at the end, so positive pressure is generated, and from this inflow taper section 6 the disk rotation of the protruding surface section 5 is caused. When the airflow flowing into the portion 5a on the upstream side in the direction reaches the concave portion 7, the distance between the disk 10 and the support plate 3 suddenly widens, so that the pressure decreases. That is, the upstream portion 5a of the protruding surface portion 5 functions as a positive pressure generating surface, and the recessed portion 7 functions as a negative pressure generating surface. Further, the airflow flowing from the inflow taper portion 6 to both side portions 5b of the protruding surface portion 5 along the disk rotation direction flows toward the downstream side on the flat surface and generates positive pressure, and eventually the disk 10 It is sucked toward the bottom of the surface, forming a concave depression, and tension is generated. - direction, magnetic head 1
protrudes from the protruding surface part 5 by a certain amount, so that 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.

[Problems to be Solved by the Invention] However, the above-mentioned conventional magnetic head support device has the following problems:
If the airflow flowing from the inflow taper portion 6 to both side portions 5b of the protruding surface portion 5 does not pass through to the downstream side in the disk rotation direction but flows out to the side of the support plate 3 on the way, this side portion 5b that should generate positive pressure There was a problem in that negative pressure was generated in the disk 10, causing abnormal adhesion to the disk 10 and deteriorating the head touch.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a highly reliable magnetic head support device in which the protruding surface portion of the surface of the support reliably generates positive pressure.

[A Thousand Steps to Solve the Problems] In order to achieve the object L, the present invention provides a magnetic head for writing and/or reading signals on a flexible disk, and a magnetic head for writing and/or reading signals on a flexible disk, and a a support body having a side portion and both side portions along the disk rotation direction as a protruding surface portion, and a portion surrounded on three sides by the protruding surface portion as a concave portion for supporting the magnetic head; In a magnetic head support device in which the magnetic head is brought into contact with the disk in such a manner that airflow flowing into the surface of the support generates positive pressure at the protrusion and negative pressure at the recess, Concave grooves extending along the disk rotation direction and having at least the upstream side as an open end are provided on both sides of the protrusion on the surface.

[Function] According to the above means, the airflow reliably passes from the upstream side to the downstream side in the disk rotation direction guided by the groove provided in the protruding surface portion of the support surface, so that negative pressure is generated at the protruding surface portion. There is no possibility that this will occur.

[Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3. Here, FIG. 1 is a plan view of the magnetic head support device, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG.
It is a sectional view taken along the line BB in the figure, and parts corresponding to those in FIG. 4 described above are given the same reference numerals.

As shown in FIGS. 1 to 3, this magnetic head support device has a projecting surface portion 5 formed of a flat surface approximately C-shaped in plan view on the upper surface of the support plate 3, and a projecting surface portion 5 formed of a flat surface having a substantially C-shape in plan view, and an upstream portion in the disk rotation direction (direction of arrow R). An inflow taper part 6 with a tapered front forest part on the side, a concave part 7 surrounded on three sides by the protruding part 5 and open on the downstream side in the disk rotation direction, and a pair of concave grooves 8 extending in the disk rotation direction. is formed, and a magnetic head l is supported and fixed within the portal recess 7. The groove 8 is a groove having a substantially ■-shaped cross section extending longitudinally through both side portions 5b of the protruding surface portion 5 along the disk rotation direction and reaching the inflow taper portion 6, and is formed over the entire length of the support hole 3. Both ends of the groove 8 are open ends.

Therefore, when a disk (not shown) is rotated at high speed at a position facing the support plate 3, the airflow flowing from the upstream side in the disk rotation direction to the both side portions 5b of the protruding surface portion 5 via the inflow taper portion 6 is guided into the groove 8. Therefore, positive pressure is reliably generated in the both side portions 5b. Further, the airflow flowing into the upstream portion 5a of the protruding surface portion 5 via the inflow taper portion 6 is similar to the conventional example.
Positive pressure is generated in the first-stream side portion 5a, and negative pressure is generated in the concave portion 7.

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, the concave grooves 8 for guiding airflow are provided in both side portions 5b of the protruding surface portion 5, and the protruding surface portion including the both side portions 5b, which has conventionally been at risk of causing abnormal suction, is Since the entire section 5 is designed to ensure that positive pressure is generated,
As a result, the disk is actively attracted to the concave portion 7, and a good head touch can always be obtained.

In the above embodiment, both ends of the groove 8 are open [one end], but one end of the groove 8 on the downstream side in the disk rotation direction is connected to the rear end (downstream end) of the both sides 5b of the protrusion 5. part) may be a closed end located nearby.

Further, in the above embodiment, the cross-sectional shape of the groove 8 is approximately ■-shaped, but the cross-sectional shape of the groove 8 may be approximately U-shaped, rectangular, etc.
It can be selected as appropriate.

[Effects of the Invention] As explained above, according to the present invention, in which grooves extending in the direction of disk rotation are provided on both sides of the protruding surface portion of the surface of the support, airflow flowing into both side portions when the disk rotates can flow into the grooves. Since it is guided by the groove and reliably passes through to the downstream side, positive pressure is reliably generated on the entire protruding surface including the parts on both sides, where there was a risk of abnormal adsorption in the past, and as a result, good head touch is always achieved. Therefore, it is possible to provide a highly reliable magnetic head support device.

[Brief explanation of drawings]

1 to 3 relate to one embodiment of the present invention, in which FIG. 1 is a plan view of a magnetic head support device, and FIG.
3 is a sectional view taken along the line B--B in FIG. 1, and FIG. 4 is a perspective view of a conventional magnetic head support device. 1...Magnetic head, 3...Support plate, 5
...Protruding surface portion, 5a...Upstream side portion, 5
b... Both sides, 6... Inflow taper part, 7...
...Concave portion, 8...Concave groove. 2nd figure 8

Claims (1)

[Claims] a magnetic head for writing and/or reading signals on a flexible magnetic disk; an upstream portion in the rotational direction of the magnetic disk and both side portions along the rotational direction of the magnetic disk as a protruding surface portion; and the protruding surface portion and a support whose portion surrounded on three sides is a concave portion for supporting the magnetic head, and when the magnetic disk rotates, airflow flowing into the surface of the support generates positive pressure on the protruding surface portion, thereby generating the magnetic head. In a magnetic head support device that brings the magnetic head into contact with the magnetic disk by generating negative pressure in the recessed portion, a magnetic head is provided on both sides of the protruding surface portion on the surface of the support body along the rotation direction of the magnetic disk. 1. A magnetic head support device comprising an extending groove having an open end at least on the upstream side.