JPS6319972Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention aims to maintain a constant floating height in a swing arm type floating head slider for recording and reproducing information on a rotating recording/reproducing disk.

FIG. 1 is a diagram showing an access method for a floating head slider in a conventional swing arm system. The swing arm 6, which has the floating head slider 1 attached to its tip, moves from B to C around the arm bearing 7.
, and is set at a predetermined position, and information is written to or read from the recording/reproducing disk 4.

2 is an explanatory diagram of the operation of the floating head slider 1 of FIG. 1, and FIG. 3 is a perspective view of the floating head slider 1 of FIGS. 1 and 2 turned over. In the figure, 2 is a floating surface, 3 is an air inflow slope, and two surfaces 2a, 2b and 3 each have a width W.
It is divided into b and 3b. Reference numeral 5 denotes a pressing spring for pressing the floating head slider 1 against the magnetic disk 4 with a predetermined pressure. F indicates the direction of the levitation force, and U indicates the rotation direction of the magnetic disk 4. In FIG. 2, when the magnetic disk 4 is at rest, the floating head slider 1 is in contact with the surface of the magnetic disk 4 due to the pressing force of the pressing spring 5.
When starts rotating at high speed in the direction indicated by arrow U, an air flow is generated, and this air flow flows in from the air inlet gradient 3. Then, pressure is generated on the floating surface 2 and a floating force F is generated, and the floating head slider 1 floats up and is stably held in the air at a point balanced with the pressing force of the pressing spring 5.

FIG. 4 is a diagram showing a change in the direction of the air flow flowing through the floating head slider 1 due to the movement of the swing arm 6. The direction of the flow of air near the surface of the magnetic disk 4 caused by the frictional force when the magnetic disk 4 rotates is tangential to the circumference of the magnetic disk 4. Therefore, assuming that the longitudinal direction of the floating surface 2 of the floating head slider 1 and the linear direction of the circumference of the magnetic disk 4 match at point A in FIG. 1, the air flow direction at this time is as shown in FIG. The direction is A→A, and the floating surface 2 of the floating head slider 1
It coincides with the longitudinal direction of a and 2b. Next, when the swing arm 6 is moved to record or reproduce the memory at the position B in FIG. direction is off, 4th
Air flows from the diagonal direction of the floating head slider 1 as shown in the diagram B→B. C in Figure 1
The same applies to points.

FIG. 5 is a diagram showing the pressure distribution in the width W direction generated on the floating surface 2a of the floating head slider 1. In the case of the direction A→A in FIG. It is distributed symmetrically along the branch line, but B→B
When air flows in obliquely, the resulting pressure distribution also becomes asymmetrical. The same applies to the C→C direction. In this way, in the case of an asymmetric pressure distribution, not only does the floating head slider 1 tilt with respect to the width direction, but also the flying height becomes low because the flying force F becomes small. This has a serious impact on information recording and reproduction.

As described above, the conventional floating head slider 1 has the drawback that the flying height fluctuates due to changes in the direction of air flow when the swing arm 6 moves.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above.The floating surface of the floating head slider facing the recording/reproducing disk is made circular, and the floating surface is symmetrically centered around the central axis of this circular shape. It is an object of the present invention to provide a floating head slider that can maintain a constant flying height even if the direction of air flow changes when the swing arm moves by cutting out the peripheral edge.

An embodiment of this invention will be described below with reference to the drawings. Figure 6 is a perspective view showing an upside-down floating head slider according to an embodiment of this invention. In the figure, 2 is a circular floating surface, and 3 is a portion obtained by cutting out the periphery of the floating surface 2 symmetrically with respect to the central axis of the circle, and this portion 3 and the floating surface 2 form a truncated cone shape. The portion 3 where the periphery of the floating surface 2 is cut out corresponds to the air inflow gradients 3, 3a, and 3b of the conventional example.

In the case of such a configuration, as shown in FIG. 7, no matter which direction of air inflow into the floating head slider 1 is A, B, or C, the levitation force generated in all directions is the same. It is easy to understand that. Therefore, even if the direction of air flowing into the floating head slider 1 changes, the flying height of the floating head slider 1 can be kept constant, and the performance of the magnetic head is stabilized.

FIGS. 8 and 9 are perspective views respectively showing other embodiments of this invention turned over. Fig. 8 shows an example in which the inside is hollowed out to reduce weight, and Fig. 9 shows an example in which both the upper and lower parts of the peripheral edge of the floating surface 2 are cut out so as not to disturb the air flow near the floating head slider.

In the above description, the floating head slider 1 for the magnetic disk 4 has been described, but it may also be an optical disk.

As described above, according to this invention, the floating surface of the floating head slider facing the recording/reproducing disk is made circular, and the periphery of the circular floating surface is cut out symmetrically to the central axis of this circular shape, so that the swing arm can be moved. The flying height of the floating head slider can be maintained constant even if the direction of the air flow changes, and as a result, information can be stably recorded and reproduced on the recording/reproducing disk.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the access method of the conventional floating head slider, Figure 2 is an explanatory diagram of the operation of the floating head slider in Figure 1, and Figure 3 is the conventional head slider shown in Figure 1 turned over. A perspective view showing
Fig. 4 is a plan view showing the change in the direction of the airflow flowing to the floating head slider due to the movement of the swing arm, Fig. 5 is an explanatory drawing showing the pressure distribution in the width direction of the floating surface of the floating head slider, and Fig. 6 is FIG. 7 is a perspective view showing the floating head slider according to an embodiment of the invention turned over; FIG. 7 is a plan view showing changes in the air flow flowing through the floating head slider of FIG. The figure is a perspective view of a floating head slider according to another embodiment of the invention, respectively turned upside down. In the figure, 1 is a floating head slider, 2, 2
a and 2b are floating surfaces; 3, 3a, and 3b are slopes for air inflow or portions obtained by cutting out the peripheral edge of the circular floating surface 2 symmetrically with respect to the central axis of the circle; 4 is a recording/reproducing disk;
6 is a swing arm. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] In a swing-arm type floating head slider for recording and reproducing information on a rotating recording/reproducing disk, the floating surface of the floating head slider facing the disk is circular, and the circular floating surface is symmetrical about the central axis of the circular disk. A floating head slider characterized by a cutout on the periphery of the surface.