JPS62110679A - Loader and unloader for floating type slider - Google Patents

Abstract

PURPOSE:To prevent a medium from wearing and damaging by loading a slider so as to approach from the front end of the slider onto a recording medium when the slider approaches to the recording medium, and unloading the slider so as to part from the rear end of the slider when the slider parts from the recording medium. CONSTITUTION:When loaded, the tip 5 of a leaf spring 4 makes approach a slider 1 to the plane of a medium 10 with an attitude of leaning forward by pressing the leaf spring 4 with an electromagnetic solenoid 8. At such a time, at the front part of the slider, a positive pressure is generated so far not to bring contact the medium with the slider, and afterwards, the rear end of the slider approaches and progresses to a table floating attitude. On the other hand, when unloaded, the slider leans forward by pulling the leaf spring 6 with the electromagnetic solenoid 8 in the opposite direction of the slider 1. At such a time and when the rotation of a disc is terminated, a dynamic pressure is reduced and the slider 1 tries to part from the medium 10 by the rigidity of a flexure 2. At such a time, the slider 1 parts from the medium 10 from its rear end. Therefore, a high pressure is applied at the front part, and an unloading is performed without generating a contact between the disc and the slider, and the medium does not receive a damage.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to loading and unloading of sliders in magnetic disk devices.
This invention relates to an unloading device.

Conventional technology Conventionally, magnetic disk drives have used hydrodynamic floating sliders that fly above the recording medium while keeping a constant minute gap by using the dynamic pressure generated between the disk heads as the medium travels. There is.

The magnetic transducer of this floating slider obtains higher recording density and output as it approaches the recording medium, so the slider must be lower in flying height. To achieve this, the medium,
The surface properties of each head are improved.

Problems to be Solved by the Invention When this floating slider is used in the contact start/stop (C3S) method, the magnetic recording medium surface and the slider surface are in contact with each other while the medium is stopped rotating, and the slider surface is left unattended for a long time. At this time, a phenomenon occurs in which the slider surface comes into close contact with the recording medium and cannot be easily removed.

If the disk begins to rotate in this closely-contact state, there is a possibility that it will not only damage the medium surface and destroy the recorded information, but also destroy the assembly mechanism such as the head flexure.

In addition, the media surface is not a perfect mirror surface, but has an arbitrary shape and undulations, so when the media starts or at low speed just before stopping, it runs in contact without floating, which can cause wear on the slider and media. there were.

Means for Solving the Problems The present invention maintains a distance between the medium and the slider to such an extent that no dynamic pressure is generated on the slider when the slider is not floating, such as when the slider is stopped or immediately before starting or stopping, and after a certain rotation, the slider is loaded and has an unloading mechanism during rotation. The mechanism is a loading mechanism that transitions to a stable flying state by moving the slider closer to the media surface than the front end during constant rotation of the medium.When unloading, move it away from the rear end to reduce dynamic pressure, and the slider loading mechanism is moved closer to the media than the media. There is no contact with the disk (no wear or scratches on the media or slider surface, and no close contact with the disk).

Embodiment An embodiment of the floating slider loading/unloading device of the present invention will be described below. The floating slider used in this embodiment is a self-loading negative pressure slider. The slider 1 is attached approximately to the center of a leaf spring-like flexure 2, and the flexure 2 is also fixed to an arm 3.

In the assembled state of the slider and flexure, the flexure 2 has degrees of freedom such as the vertical direction of the slider 1 and rotation around the center of the slider. A second leaf spring 6 for loading is arranged on the opposite side of the slider to the leaf spring-shaped flexure 2. One end of the first leaf spring 4 is fixed to the arm 3, the other end is bent at a substantially right angle toward the slider, and its tip 5 is pointed. When this tip 5 is bent toward the slider 1 by an external force as shown in FIG. 2, it is configured to push a point on the flexiair 2 located closer to the front end than the center of the slider 1. Also, one end of the second leaf spring 6 is fixed to the arm 3, and the other end is bent toward the slider 1, and its sharp tip 7 is located toward the rear of the center of the back surface of the slider 1 of the flexure 2. is glued to. The spring constant of this second leaf spring 6 is set to be sufficiently weaker than that of the flexure 2. Fig. 4 shows the relationship between the pressure between the slider 1 and the medium 10. Fig. 4A shows the slider 1 tilted forward, and it can be seen that when the slider 1 is tilted forward, the pressure between the front part of the slider 1 and the medium 10 increases.The slider 1 stops the rotation of the medium. During the rotation and when not floating, the distance is 0.1 mm or more so that no dynamic pressure is generated due to rotation and there is no contact with the medium.

This is due to the following reasons. In other words, it is sufficient to maintain a distance of 10 .mu.m between the medium and the slider so as not to generate dynamic pressure, but it is necessary to take into account the vibration of the medium during rotation and the assembly overlap in the assembly.

The amplitude of the vibration of the rotating medium is about 50 μm at maximum,
Further, it is usually difficult to reduce the assembly intersection to 40 μm or less.

Therefore, it is necessary to separate the head and medium by about 0.1 mm.

When loading the slider onto the medium from this state, the electromagnetic solenoid 8 pushes the leaf spring 4, so that the tip 5 of the leaf spring 4 pushes the front end of the slider towards the medium 10 from the center of the rear surface.
approach the surface while leaning forward. At this time, Figure 4A
As shown in , sufficient positive pressure is generated at the front of the slider to prevent the medium from coming into contact with the slider, and thereafter the rear end of the slider approaches and transitions to a stable flying position. Finally, the electromagnetic solenoid 8 returns to its original state, and along with this, the first leaf spring 4
The flexure 2 and the slider 1 return to their original state, and the rigidity of the flexure 2 and the dynamic pressure of the slider are balanced, and the flexure 2 and the slider 1 shift to a stable floating state.

On the other hand, during unloading, the second leaf spring 6 is pulled in the opposite direction to the slider 1 by means such as an electromagnetic solenoid, as shown in FIG. Then, a moment is applied to the slider 1 that causes it to lean forward. At this time, when the rotation of the disk is stopped, the dynamic pressure decreases and the slider 1 tends to move away from the medium 10 due to the rigidity of the flexure 2. At this time, the slider 1 is moved by the moment force from the second leaf spring 6.
is separated from the medium 10 from the rear end. Therefore, the same pressure is applied at the front as during loading (as shown in FIG. 4A), and unloading can be performed without the disk and slider coming into contact.

FIG. 4 shows temporal changes in the distance between the slider 1 and the surface of the medium 10 during loading. Loading and unloading is possible without contacting the media while repeating appropriate vibrations to a stable floating state of submicrons from a distance that does not generate dynamic pressure, and the slider and media are tightly attached without wear or damage. The phenomenon will also disappear.

[Brief explanation of drawings]

Fig. 1 is a bottom perspective view showing the external appearance of one embodiment of the floating slider loading/unloading device of the present invention, Fig. 2 is a side view showing the same in the loading state, and Fig. 3 shows the same in the unloading state. A side view, FIG. 4 is a pressure distribution diagram, and FIG. 5 is a graph showing changes in flying height during loading. 1...Slider 2...Flexure 3...Arm 4...First plate spring 6...Second plate spring 8...Electromagnetic solenoid 10... Name of media agent: Patent attorney Toshio Nakao (1 person) Figure 1 Figure 2 Figure 3

Claims (2)

[Claims] (1) A floating slider is provided movably so that it can approach or leave the magnetic medium, and when the slider approaches the recording medium, it is loaded so that it approaches the recording medium from the front end of the slider, and the slider Loading/loading of a floating type slider, characterized in that when the slider leaves the recording medium, it is unloaded so that the rear end is separated from the recording medium.
Unloading device. (2) The floating slider loading/unloading device according to claim 1, wherein a negative pressure slider is used as the dynamic pressure floating slider.